Rajasekhar Viswanadha Srirama Pullabhotla

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• PhD
• Professor at University of Zululand

This study used a bioflocculant produced by Pseudomonas yamanorum as a reducing and stabilizing agent in the green synthesis of copper nanoparticles (CuNPs). Several techniques like UV-Visible absorption, Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), thermogravimetric...

Chemical flocculants are known to pose environmental risks due to their toxicity, prompting interest in biodegradable and eco-friendly bioflocculants as alternatives. Despite their environmental benefits, the industrial adorption of bioflocculants is hindered by their lower efficiency and high production costs. Nanotechnology offers promising solut...

uMhlathuze River in KwaZulu-Natal, South Africa, is a critical freshwater resource supporting industrial, agricultural, and domestic activities. However, its water quality is under threat from various anthropogenic pressures. This review synthesises existing literature to assess the river’s water quality, focusing on key contaminants, spatial and t...

Nanotechnology offers effective solutions for removing contaminants and harmful bacteria from polluted water. This study synthesized copper nanoparticles using a carbohydrate-based bioflocculant derived from Proteus mirabilis AB 932526.1. The bioflocculant is a natural polymer that facilitates the aggregation of particles, enhancing the efficiency...

This study investigated the catalytic potential of metal-loaded gamma alumina catalysts in the ozonation of 1,2-dichlorobenzene (DCB) under ambient reaction conditions. Different metal (Fe, Ni, and V) loaded gamma alumina catalysts were synthesized via wet impregnation technique and characterized using ICP-OES, FT-IR, BET, XRD, TEM, and SEM techniq...

A supercapacitor is a fascinating electrical device with advanced electrochemical properties, including high energy density, quick charge-discharge rates, remarkable cycle stability, and elevated specific capacitance. These characteristics distinguish a supercapacitor from other comparable electronic devices. Significant research and development ef...

Studying the utilization of natural products in the biosynthesis of silver nanoparticles (AgNPs) recently appears to be a fascinating area of research within nanotechnology. These nanoparticles exhibit biocompatibility and inherent stability, making them highly suitable for various industrial applications. The utilization of bioflocculant-synthesiz...

Nanotechnology is being used to solve a variety of environmental issues, including wastewater treatment. In the present study, a rapid eco-friendly method was applied to biosynthesize and optimize copper nanoparticles (CuNPs) from Kytococcus sedentarius. The CuNPs characteristics were identified using X-ray diffractometer (XRD), scanning electron m...

Enantiomeric analysis of chiral drugs is very significant, as their enantiomers display different pharmacological or toxicological behavior towards living systems. Among these drugs, β‐blockers are available as racemates, where their enantiomers display different pharmacological effects. Herein, we report enantioselective separation of two β‐blocke...

Traditional knowledge refers to the knowledge, methods, processes, and practices in a specific field of study that have been passed down to us from our ancestors through customs, traditions, folklore, literature, lifestyle, and habits. India, being the world's oldest civilization, possesses a vast reservoir of ancient knowledge that has the potenti...

Nanotechnology is a rapidly expanding field with diverse healthcare, agriculture, and industry applications. Central to this discipline is manipulating materials at the nanoscale, particularly nanoparticles (NPs) ranging from 1 to 100 nm. These NPs can be synthesized through various methods, including chemical, physical, and biological processes. A...

At low temperature and pressure (20 o C and 1 atm), the oxidation of 1,2-dichlorobenzene using ozone and metal (Mn, Ni, V, and Fe) supported on TiO2 catalysts was investigated in this study. The metal loaded on TiO2 catalysts were prepared using the wet impregnation method and characterized using FT-IR, XRD, SEM-EDX, BET, TEM, and ICP-OES technique...

The intriguing characteristics of nanoparticles have fueled recent advancement in the field of nanotechnology. In the current study, a microbial-based bioflocculant made from the SCOBY of Kombucha tea broth was purified, profiled, and utilized to biosynthesize iron nanoparticles as a capping and reducing agent. UV–visible absorption spectroscopy, t...

Copper nanoparticles (CuNPs) are tiny materials with special features such as high electric conductivity, catalytic activity, antimicrobial activity, and optical activity. Published reports demonstrate their utilization in various fields, including biomedical, agricultural, environmental, wastewater treatment, and sensor fields. CuNPs can be produc...

Rust-free building materials are crucial for ensuring the durability and structural stability of constructions. Corrosion, a widespread issue affecting metals like steel, copper, and concrete, can be effectively managed with the help of corrosion inhibitors. One effective method for corrosion inhibition involves the application of corrosion-inhibit...

Green synthesis of nanoparticles from bacterial origin has become popular due to the advantages associated with it. Ochrobacrtum species supernatant of various pH (4, 7 and 10) was subjected to a filtered 1.0 mM AgNO3 solution, and the mixture was incubated at 37 ℃ for 48 h. This was done to reduce silver ions into elemental silver to form nanopart...

Nanotechnology has emerged as an effective means of removing contaminants from water. Traditional techniques for producing nanoparticles, such as physical methods (condensation and evaporation) and chemical methods (oxidation and reduction), have demonstrated high efficiency. However, these methods come with certain drawbacks, including the signifi...

The application of microbial flocculants in nanoparticle synthesis is attracting scientists to utilize them due to their eco-friendliness. This study was mainly focused on biosynthesizing and characterizing copper nanoparticles from a non-pathogenic microorganism Kytococcus sedentarius to produce bioflocculant. The formed copper nanoparticles (CuNP...

Oxidative degradation of 1,2-dichlorobenzene using different loadings of metal (Mn, Ni, V, and Fe) supported on CeO 2 was studied. All metal (Mn, Ni, V, and Fe) loaded CeO 2 catalysts were synthesized using the method called wet impregnation and the as-synthesized catalyst materials were characterized using different analytical instruments such as...

Catalytic oxidation is an oxidation process that converts volatile organics and water carbon in the presence of the catalyst. A catalyst is a substance that is used to accelerate the rate of reaction at a given temperature without itself being consumed during the reaction and it can be used repeatedly. This review presents catalytic oxidation of or...

Chiral organic pollutants, including pesticides, herbicides, medicines, flame retardants, and polycyclic musk, represent a significant threat to both the environment and human health. The presence of asymmetric centers in the structure of chiral pesticides introduces stereoisomers with distinct distributions, fates, biomagnification capacities, and...

The present work deals with the synthesis of a novel chiral derivatizing reagent (CDR), namely, N-(4-chloro-6-piperidinyl-[1,3,5]-triazine-2-yl)-D-phenylglycine and its use for stereoselective separation of (RS)-isoproterenol (ISP) in spiked human plasma. The synthesized CDR was utilized for the derivatization of ISP enantiomers, and the diastereom...

The water quality of Lake Nsezi in Richards Bay, South Africa was investigated for the possible influence of anthropogenic activities around the lake. Lake water was sampled for a period of one year from May 2014 to May 2015. Physicochemical and bacteriological analysis were compared to regulations of WHO, USEPA and DWAF WQG for aquatic environment...

The catalytic oxidation of environmentally unfriendly chlorinated organics is a powerful tool that can be used to completely mineralize these organic compounds. In this study, metals (Mn, Ni, V, and Fe) supported on zirconia have been investigated as catalysts in the oxidation of 1,2-dichlorobenzene. Metal supported on zirconia catalysts were prepa...

Studying the production of Iron (Fe) nanoparticles using natural substances is an intriguing area of research in nanotechnology, as these nanoparticles possess biocompatibility and natural stability, which make them useful for a variety of industrial applications. The study utilized Fe nanoparticles that were synthesized using a bioflocculant and a...

Studying the production of Iron (Fe) nanoparticles using natural substances is an intriguing area of research in nanotechnology, as these nanoparticles possess biocompatibility and natural stability, which make them useful for a variety of industrial applications. The study utilized Fe nanoparticles that were synthesized using a bioflocculant and a...

The bacterial spread can pose a significant risk in the transmission of infectious diseases. Nanomaterials, including synthetic antibacterial nanoparticles, have emerged as a promising solution to combat bacterial infections due to their unique physicochemical properties. Metal nanoparticles have been shown to exhibit potent antimicrobial activity...

Over recent years, the ‘green’ chemistry approach to synthesizing nanoparticles has made significant developments. Because of their unique features, nanoparticles have received a lot of attention. The use of a bioflocculant to promote the environmentally friendly synthesis of copper nanoparticles is described in this paper. Copper nanoparticles wer...

In this work, we extracted, purified, and characterized two active pharmaceutical ingredients, levocetirizine and levosalbutamol (from commercial tablet formulations), and used them as chiral selectors for enantioresolution of gatifloxacin through thin-layer chromatographic (TLC) method. The silica gel was impregnated with a chiral selector for the...

We established a validated high‐performance liquid chromatography method utilizing Frovatriptan as a chiral derivatizing agent to separate the enantiomers of ketoprofen from commercially available tablet formulations. The chiral derivatizing agent facilitated the synthesis of diastereomeric derivatives of ketoprofen, which were separated on a rever...

Most drug structures lack appropriate chromophores that can be examined at wavelengths other than the generic UV part of the electromagnetic spectrum. Indirect spectrophotometric/spectrofluorimetric analysis involving chemical derivatization in which molecules lacking UV-Vis absorbing moieties are transformed into derivatives with good chromophores...

Bimetallic gold (Au) catalysts present an exceptional development trend toward enhancing the catalytic efficiency of the Au based catalysts. The aim of this review is to provide an insight into synergic effect of the bimetallic Au catalysts in enhancing the efficiency of various processes. The review covers some important aspects involving the effe...

In this study, we investigate the oxidation of cyclohexane using various percentages of Mn/ γ -Al 2 O 3 catalysts. The catalysts were characterized with various spectroscopic and microscopic techniques. The XRD showed the presence of γ -Al 2 O 3 and MnO only. However, the XPS showed that AlO, AlOH, Mn 2 O 3 and MnO 2 also exist. The TEM results of...

Microbial flocculants affect the aggregation of suspended solutes in solutions, thus, they are a viable alternative to inorganic and organic synthetic flocculants which are associated with deleterious health problems. Moreover, a potential solution for wastewater treatment. The study aimed to produce and characterize a bioflocculant from Proteus mi...

Bimetallic nanoparticles are a complex nanoscale combination of two metal constituents. The superior properties of bimetallic nanoparticles (BNPs) compared with monometallic nanoparticles have attracted much attention from both scientific and technological perspectives. In recent years, many fabrication techniques have been proposed, and the detail...

Electrochemical methods have become increasingly popular in the pharmaceutical and drug analysis sectors due to their numerous benefits, such as high sensitivity, selectivity, and specificity. Electrochemical-based nanomaterials are adjustable and can be influenced by the type of electrode used and the applied potential. Electroanalytical methods h...

Selective transformation of cyclohexane to cyclohexanol and cyclohexanone (mixture called KA oil) under mild reaction constitutes is one of the interesting but challenging reactions in green chemistry. In this work, we report mild reaction catalytic oxidation of cyclohexane over Fe supported SiO2 and γ-Al2O3 nanoparticles as novel catalysts at pH 3...

Selective oxidation of cyclohexane has gained substantial interest in the field of research due to the prominence of its products in industrial processes. Particularly, advanced oxidation processes (AOPs) constitute a positive technology for the oxidation of cyclohexane owing to their high oxidation potentials and environmental benign properties. T...

Biosynthesis of zinc oxide (ZnO) nanoparticles using natural products seems to be an interesting research to study in nanotechnology, as they (ZnO nanoparticles) are biocompatible and stable in nature, owing to their wide applications industrially. In this study, the bioflocculant-synthesized zinc oxide nanoparticles were used in the removal of var...

Selective oxidation of cyclohexane has gained substantial interest in the field of research due to the prominence of its products in industrial processes. Particularly, advanced oxidation processes (AOPs) constitute a positive technology for the oxidation of cyclohexane owing to their high oxidation potentials and environmental benign properties. T...

Zinc oxide (ZnO) nanoparticles have acquired ubiquitous attentiveness owing to their distinctive features, making them appropriate for a diversity of applications in many fields of life science. Green synthesis approach for nanoparticles has garnered substantial interest due to their immanent characteristics which include swiftness, costeffectivene...

Oxidative degradation of o -, m - and p -cresols using ozone in the presence of V 2 O 5 -supported metal (Mn, Fe, Ni) catalysts was studied under ambient reaction conditions. Metal (Mn, Fe, Ni) loaded V 2 O 5 catalysts were prepared using a wet-impregnation method, thereafter, characterized, and analyzed by use of the XRD, FT-IR, SEM-EDX, TEM, and...

The adage of new generation of fine chemicals process is the best process applied in the absence of conventional methods. However, many methods use different reaction parameters, such as basic and acidic catalysts, for example oxidation, reduction, bromination, water splitting, cyanohydrin, ethoxylation, syngas, aldol condensation, Michael addition...

A variety of flocculants have been used to aggregate colloidal substances. However, recently, owing to the adverse effects and high costs of conventional flocculants, natural flocculants such as microbial flocculants are gaining attention. The aim of the study was to produce and characterize a bioflocculant from Pichia kudriavzevii MH545928.1 and a...

Cobalt ferrite nanocomposite was synthesized and characterized by analytical techniques such as FESEM, EDS and XRD. The average crystallite size was found to be in the range of 10–12 nm with a cubic structure. Further, the nanocomposite was used for the detection of guanine (GU) and uric acid (UA) and found to be an efficient electrode modifier. Th...

Biolocculants are gaining attention in research due to their environmental friendliness and innocuousness to human in comparison to the conventional flocculants. The present study aimed to investigate the ability of fungi from Kombucha tea SCOBY to produce effective bioflocculant in bulk. A 16S rRNA gene sequence analysis was utilized to identify t...

Citation: Tsilo, P.H.; Basson, A.K.; Ntombela, Z.G.; Maliehe, T.S.; Pullabhotla, R.V.S.R. Isolation and Optimization of Culture Conditions of a Bioflocculant-Producing Fungi from Kombucha Tea SCOBY. Microbiol. Res. 2021, 12, 950-966.

The low microbial flocculant yields and efficiencies limit their industrial applications. There is a need to identify bacteria with high bioflocculant production. The aim of this study was to isolate and identify a bioflocculant-producing bacterium from activated sludge wastewater and characterise its bioflocculant activity. The identification of t...

The search for biodegradable, economical and sustainable extracellular biopolymers from microorganism has been on the rise globally since chemical flocculants have been found to be hazardous to the environment. Marine sediments have been reported to contain a wide array of unique, diversified and novel organisms than those found in terrestrial and...

The search for biodegradable, economical and sustainable extracellular biopolymers from microorganism has been on the rise globally since chemical flocculants have been found to be hazardous to the environment. Marine sediments have been reported to contain a wide array of unique, diversified and novel organisms than those found in terrestrial and...

This work reports the enantioresolution of (RS)-acebutolol (ACB) by a thin-layer chromatographic method involving colistin sulfate (CS) as chiral selector. For this purpose, glass plates of dimension (12 cm × 4 cm × 0.4 cm) were prepared and used in four different approaches. The chiral selector was used in four different approaches before or durin...

Wastewater treatment has become a global challenge with wastewater treatment cost fast increasing. Industrial processes such as downstream processes, wastewater treatment, and several fermentation processes depend largely on the use of flocculants. Synthetic flocculants, which are conventionally used in wastewater treatment, are hazardous to the en...

A green catalysts are designed for environmentally benevolent and economic process that exhibits various applications in chemical industries. This chapter focuses on various types of heterogeneous catalysts for oxidation of alcohols with other oxidant’s i.e. 30 percent H2O2, reduction of alkyl aromatics, and substituted aromatic’s, acylation of aro...

This chapter summarizes on the combination of cellulose nano crystal nano fibrils based materials with titanium oxide. These materials promotes a novel functional toward the formation of cellulose nano crystals/nano fibrils and titanium oxides for waste water treatment. There have been excellent comparability between photocatalysts TiO2 and cellulo...

A broad range of applications and interesting properties of core-shell nanoparticles (CSNs) such as catalysis, sensors, material chemistry, biology, and water purification have gained the huge interest of most researchers in recent years. The aim of the study was to synthesise Fe@Cu CSNs nanoparticles using a bioflocculant and to evaluate its poten...

Corchorus olitorius, a leafy vegetable with high nutrient content, is normally collected from the wild, in areas that are prone to cadmium (Cd) toxicity. However, studies on how Cd accumulation affects vegetative and reproductive traits of leafy vegetables in South Africa are limited. Therefore, this study tested the effect of Cd accumulation on C....

Nanotechnology addresses numerous environmental problems such as wastewater treatment. Ground water, surface water and wastewater that is contaminated by toxic organic, inorganic solutes and pathogenic microorganisms can now be treated through the application of nanotechnology. The study reports iron@copper (Fe@Cu) nanoparticles, iron nanoparticles...

Iron, the most ubiquitous of the transition metals and the fourth most plentiful metal in the Earth’s crust, is the structural backbone of our modern infrastructure. It is therefore ironic that as a nanoparticle, iron has been somewhat neglected in favour of its own oxides as well as other metals such as cobalt, nickel, gold, and platinum. This stu...

Wastewater remains a global challenge. Various methods have been used in wastewater treatment, including flocculation. The aim of this study was to synthesize iron nanoparticles (FeNPs) using a polymeric bioflocculant and to evaluate its efficacy in the removal of pollutants in wastewater. A comparison between the efficiencies of the bioflocculant...

Green synthesis of core–shell nanoparticles is gaining importance nowadays as it is viewed as being environmental friendly and cost effective. The present study aimed to synthesize iron@copper core–shell nanoparticles using a polysaccharide-based bioflocculant from Alcalegenis faecalis and to evaluate its efficiency in dye removal and river water a...

The ozone-initiated oxidation of 1,2-dichlorobenzene catalysed by manganese supported on metal oxide (γ-Al2O3 and SiO2) at ambient temperature and pressure conditions is reported in this study. Wet impregnation method was used to synthesize various percentages of Mn loading on γ-Al2O3 and SiO2 supports. The catalysts were characterised by FT-IR, SE...

There has been great progress in the ‘green’ chemistry approach for the synthesis of nanoparticles in recent years. Nanoparticles have gained special significance due to their unique properties. Herein we report a bioflocculant facilitated eco-friendly synthesis of copper nanoparticles (CuNPs). The copper nanoparticles were successfully synthesized...

Green protocols for synthesizing nanoparticles have demonstrated numerous benefits and advantages, which include environmental friendliness, good efficacy and possess less threat to human. The aim of this study was to biosynthesize, characterize and evaluate the effectiveness of biosynthesized iron nanoparticles. The bioflocculant was extracted usi...

A novel bacterium with bioflocculant-producing potential was amongst bacterial isolates isolated from soil sample at Tuzi Gazi, Richards Bay Harbour, Kwazulu-Natal, Republic of South Africa and screened for bioflocculant producing potential after cultivation using a production medium at 30 o C for 72 hours (160 rpm against 4g/L Kaolin clay suspensi...

Lead (Pb) can enter the food chain through the consumption of contaminated plants and can cause serious health issues. However, research on how Pb accumulation affects morphology of leafy vegetables in South Africa is minimal. This study tested the effect of lead accumulation on vegetative and reproductive traits of Corchorus olitorius. Plants were...

The selective oxidation of cyclohexane to a mixture of cyclohexanol and cyclohexanone (KA oil) is one of the imperative reactions in industrial processes. In this study, the catalytic performance of manganese-supported gamma alumina (Mn/γ-Al2O3) catalysts is investigated in the selective oxidation of cyclohexane at ambient conditions using ozone. T...

Bioflocculant from Alcaligenis faecalis HCB2 was used in the eco-friendly synthesis of the copper nanoparticles. Nanoparticles were characterized using a scanning electron microscope (SEM), transmission electron microscopy (TEM), UV-visible spectroscopy, thermo gravimetric analysis (TGA) and Fourier Transform Infrared Spectroscopy (FT-IR). The tran...

We report the catalytic ozonation as a viable tool in the oxidative degradation of cresol isomers. SiO2-supported metal catalysts with 2.5 and 7.5 wt.% (Ni, Fe, Mn, V) were employed in this ozone initiated oxidation reactions. All catalysts were characterized using various analytical techniques such as XRD, FT-IR, SEM-EDX, TEM, ICP-OES, and BET-sur...

Nanotechnology offers a great opportunity for efficient removal of pollutants and pathogenic microorganisms in water. Copper nanoparticles were synthesized using a polysaccharide bioflocculant and its flocculation, removal efficiency, and antimicrobial properties were evaluated. The synthesized nanoparticles were characterized using thermogravimetr...

The oxidative degradation of a potential pollutant, m-cresol with ozone was investigated both in the absence and presence of a catalyst. The oxidation reaction was studied as a function of time, where aliquots were drawn in every reaction from 3 to 24 h and dissolved in an absolute ethanol. The resultant product mixtures were analyzed using FT-IR a...

We report the synthesis of high quality tin sulphide nanoparticles from tetrathiourea tin(II) chloride complex as a single molecular precursor. Thiourea ligand was used in the preparation of the complex due to its low toxicity and thermal stability. The reaction conditions were changed (reaction time, reaction temperature and nature of surfactant)...

Ozone initiated oxidation of environmentally unfriendly organic compounds is one of the powerful tools that is utilized to convert and/or completely mineralize these substances. Here we have adopted the adsorption phenomenon in combination with ozonation (0.123 mg/L) of the hazardous cresol isomers mounted in a glass column. An oxide of aluminum (γ...

Tetramethylthiourea lead(II) acetate complex was exploited as a single molecular precursor in the synthesis of PbS nanoparticles. Thermolysis of the Pb-complex was investigated by passivation with various amines having different alkyl chain lengths. Close to spherical particles with average particle sizes ranging from 9.97 to 112.64 nm; cubes with...

Tetrathiourea tin(II) chloride complex was used as a single molecular precursor for the synthesis of high quality tin sulfide nanoparticles with different morphologies. Energy-dispersive X-ray spectroscopy confirmed the metal to sulphur ratio as 1:1 with no impurity. The transmission electron microscopy images showed the close to spherical shapes w...

We report the low temperature synthesis of CdE (E = S, Se and Te) semiconductor nanoparticles capped by anacardic acid, an environmentally benign naturally occurring capping ligand. The cadmium chalcogen-ide nanoparticles were synthesized by reacting the reduced chalcogen powder with cadmium chloride to form the corresponding bulk material which wa...

We report the synthesis and single X-ray structures of bis(dipiperidinyldithio-carbamato)zinc(II) and bis(ditetrahydroquinolinyldithiocarbamato)zinc(II) complexes. The complexes were thermolysed in hexadecylamine (HDA) and tri-n-octylphosphine oxide (TOPO) at different reaction temperatures to produce HDA and TOPO capped ZnS nanoparticles. The micr...

Bis(dipiperidinyldithiocarbamato)cadmium(II) (1) and bis(ditetrahydroquinolinyldithio-carbamato)cadmium(II) (2) were used as precursors for the synthesis of oleylamine (OA), decylamine (DA) and dodecylamine (DDA) capped CdS nanoparticles. The optical properties of these particles have been studied. The absorption spectra for the amine capped CdS pa...

Bismuth (Bi) nanoparticles have been prepared by a hybrid solution-based high temperature route. Capping groups such as tri-n-octylphosphine oxide (TOPO), oleylamine (OA) and hexadecylamine (HDA) were used to passivate the bismuth nanoparticles. Bismuth particles in the form of dots, branched nanorods and self assembled cubes were obtained at diffe...

Cadmium selenide (CdSe) quantum dots have gained increased attention for their potential use in biomedical applications. This has raised interest in assessing their toxicity. In this study, water-soluble, cysteine-capped CdSe nanocrystals with an average size of 15 nm were prepared through a one-pot solution-based method. The CdSe nanoparticles wer...

We report the synthesis of PVP-capped Au-CdSe hybrid nanostructures synthesized using the UV-irradiation method. The high resolution transmission electron microscopy (HRTEM) and powder X-ray diffraction (XRD) studies confirm the presence of the hybrid gold and CdSe nanoparticles.

PbS nanocubes and nanorods were successfully synthesized through a facile route using hexadecylamine (HDA) and tri-n-octylphosphine oxide (TOPO) as surfactants. The structure and morphology of the as-prepared PbS nanocrystals were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution TEM. The morphology o...

We report a simple route to HDA capped ZnTe nanoparticles using NaHTe and ZnCl2 as the tellurium and zinc sources respectively. The solution based high temperature route employs the use of readily available starting reagents. The particles synthesized at reaction temperatures of 230 °C and 270 °C were spherical in shape. The blue shift in the absor...

Cysteine and triethanolamine capped CdTe nanoparticles have been synthesized using a simple aqueous solution based method. This method involves the reaction of tellurium powder with sodium borohydride (NaBH(4)) in water to produce telluride ions (Te(2-)), followed by the simultaneous addition of an aqueous solution of cadmium chloride or other cadm...

We report the synthesis of lead piperidine and lead tetrahydroquinoline dithiocarbamate (DTC) complexes and their use as single source precursors for the preparation of anisotropic PbS nanoparticles. The complexes were thermolysed in coordinating solvents such hexadecylamime (HDA), tri-n-octylphosphine oxide (TOPO), oleylamine (OA) and decylamine (...

A simple method for the preparation of tri-n-octylphosphine oxide (TOPO) and hexadecylamine (HDA) capped CdTe particles have been employed in this study. The method involves the reduction of tellurium in water followed by the addition of the cadmium salt and thermolysis in TOPO and HDA. The influence of the reduction time (2, 4 and 6 h) of telluriu...

Water soluble triethanolamine (TEA) and cysteine capped ZnSe nanoparticles have been synthesized via simple solution based route. The method involves the reduction of selenium followed by the addition of the metal salt and capping group. The pH and metal salts were varied to study their effect on the optical properties and morphology of the particl...

Nanoparticles of lead sulfide, selenide and telluride have been synthesized by the reduction of sulfur, selenium or tellurium powder with sodium borohydride (NaBH4) to produce sulfide, selenide or telluride ions, followed by their reaction with a lead salt. In comparison to the chloride, nitrate or sulfate, considerable control of the product is po...

Multi twinned gold nanoparticles have been synthesized by an ultraviolet irradiation technique involving the reduction of a gold salt in the presence of polyvinyl pyrrolidone (PVP).