Balakrishna R Geetha

Balakrishna R Geetha
Jain University · Center for Nano and Material Sciences

Ph D

About

170
Publications
28,007
Reads
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3,380
Citations
Citations since 2017
111 Research Items
3062 Citations
20172018201920202021202220230200400600
20172018201920202021202220230200400600
20172018201920202021202220230200400600
20172018201920202021202220230200400600
Additional affiliations
March 2010 - March 2012
Jain University
Position
  • Associate Director and Professor
October 1999 - February 2010
Visvesvaraya Technological University
Position
  • Professor

Publications

Publications (170)
Article
Rapid urbanization and industrialization have significantly added to the complexity of wastewater treatment, particularly due to presence of non-segregated organic and aqueous phase, and technology to remove such mixed phase pollutants is essential. Photocatalytic iron based MOFs possessing a bandgap of 2.18 eV and a very high surface area ~1400 m2...
Chapter
Pesticides and insecticides are two important classes of compounds that are mainly used for agricultural purposes. Organophosphates are one of the main chemical classes that make pesticides and insecticides and often exhibit toxicity towards living organisms. Nerve agents, a subset of organophosphorus substances, have been developed and employed in...
Chapter
Quantum dots (QDs) are potential agents for solar energy conversion due to their size-dependent optoelectronic properties. QD-sensitized solar cells (QDSSCs) are potential candidates to meet the growing demand for clean energy due to facile and low-cost fabrication techniques. High performance is expected in this type of solar cell architecture due...
Article
Full-text available
Liquid-liquid separation is crucial in the present circumstances. Substitution of the conventional types of separation like distillation and pervaporation is mandatory due to the high energy requirement of the two. The separation of organic mixtures has a huge potential in industries such as pharmaceutical, fine chemicals, fuels, textile, papers, a...
Article
Electrochemical hydrogen evolution is an important research field to produce renewable energy. Nanostructured two dimensional (2D) materials such as g-C3N4 and MoS2 are potential electrocatalysts for hydrogen evolution reaction (HER). The incorporation of semiconducting material into 2D material enhances the hydrogen evolution. Here in, we have dev...
Article
Full-text available
Despite the advantages of high contaminant removal, operational flexibility, and technical advancements offered, the undesirable fouling property of membranes limits their durability, thus posing restrictions on their usage. An enormous struggle is underway to conquer this major challenge. Most of the earlier reviews include the basic concepts of f...
Article
In this study, titanium oxynitride with empirical composition of TiON is developed using a sol–gel and ammonia-gas-assisted thermal nitridation process. The obtained TiON phase is employed as the photoanodic electron transport layer (ETL) in a silver bismuth sulfide (AgBiS2) quantum-dot-sensitized solar cell (QDSSC) device and compared to a QDSSC c...
Article
Lithium/Sodium-ion batteries (LIB/SIB) have attracted enormous attention as a promising electrochemical energy storage system due to their high energy density and long cycle life. One of the major hurdles is the initial irreversible capacity loss during the first few cycles owing to forming the solid electrolyte interphase layer (SEI). This process...
Article
In this study, a solar energy-assisted reactor is developed and utilized for biodiesel production from Butea monosperma oil. The power generated by the developed solar photovoltaic (PV) modules could be essentially a clean and safe energy source. From the optimized conditions, a maximum yield of 94.3% Butea monosperma methyl ester (BMME) is achieve...
Article
Herein we demonstrate a high-performance full cell aqueous zinc ion battery with structurally engineered V3O7·H2O cathode and surface modified metallic zinc anode. We demonstrate that the capacity, rate performance and stability of V3O7·H2O cathode can be significantly improved via Zn²⁺ pre-intercalation, which acts as a pillaring agent to stabiliz...
Article
Perovskite quantum dots (PQDs) offer high photoluminescence quantum yields; however, due to their limited stability in aqueous media, to date their utilization in biomedical applications has been limited. The present work demonstrates highly fluorescent and stable aqueous PQDs that were synthesized using a facile engineered phase transfer method. L...
Article
In this study, Zr-based metal organic frameworks (Zr-MOFs) with different ligands such as terephthalic acid (UiO-66), 2-aminoterephthalic (UiO-66-NH2) and 2-methylimidazole (UiO-66-2M) are synthesized using hydrothermal method in order to investigate their ligand-dependent properties towards photocatalytic degradation of dyes molecules under solar...
Preprint
Full-text available
Integrated membranes are found to have tremendous application in treating oily waste water to produce potable water. The present work reports the use of graphitic carbon nitride (g-C 3 N 4 ) as a suitable membrane additive mainly because of its hydrophilic nature and strong functionality. Exfoliated g-C 3 N 4 offers high surface area and more activ...
Article
Monoelemental 2D materials such as arsenene (As) and antimonene (Sb) are creating great interest in materials research (since 2014) for designing various optoelectronic devices, energy production, and storage systems such as sensors, electrically modifiable displays, transistors, and catalysts owing to their unique properties like high surface area...
Article
The current work describes the synthesis of a new bio-waste derived cellulosic-carbon supported-palladium nanoparticles enriched magnetic nanocatalyst (Pd/Fe3O4@C) using a simple multi-step process under aerobic conditions. Under mild reaction conditions, the Pd/Fe3O4@C magnetic nanocatalyst demonstrated excellent catalytic activity in the Hiyama c...
Article
Silver bismuth sulphide (AgBiS2) ternary quantum dots are emerging as benign photon absorbers for solar cells. Higher absorption coefficient, easy processability and favourable bandgaps have enabled their potential use in solar cells. In this work, for the first time an in-situ (SILAR - Successive ionic layer adsorption and reaction) water protocol...
Article
Full-text available
Layered transition metal dichalcogenides hold tunable and promising photoelectrochemical properties. MoSe2 is a potential candidate of the transition metal dichalcogenide family, which attracted interests of various fields such as photocatalytic, electrocatalytic, energy storage, sensing and optoelectronic applications. MoSe2 demonstrates high surf...
Article
Water is a vital ingredient in all life forms and crucial for their survival. Yet, contamination of water by toxic effluents from various sources makes it lethal, posing a threat to the environment and health of living beings. Therefore, an effective and efficient method for the treatment of these effluents is the need of the hour. In continuation...
Conference Paper
Full-text available
Here in, we report the development of amine functionalized iron based (NH2-MIL-101(Fe)) metal organic frameworks (MOF) /polysulfone polymer-based membranes for removal of chromium, humic acid and chromium-humic acid complex by dead-end filtration method. The XRD, ATR-IR, BET and FESEM studies were carried out to confirm the formation of MOF and its...
Article
Full-text available
Nitrogenated graphene oxide-decorated copper sulfide nanocomposites (Cu x S-NrGO, where x = 1 and 2) are designed to be incorporated in polysulfone (PSF) membranes for effective fouling resistance of PSF membranes and their dye removal capacity. The developed membranes possess more hydrophilicity and an enhancement in pure water flux (PWF). Also, t...
Article
Full-text available
The continuous rise in crude oil prices over the last decades and crisis in feedstock availability together with food-versus-fuel debate has directed the utilization of industrial wastes for biodiesel production. Accordingly, the biodiesel or fatty acid methyl ester production has been largely explored and demonstrated with a wide variety of wastes...
Article
Full-text available
Nanostructured polymeric membranes are of great importance in enhancing the antifouling properties during water filtration. Nanomaterials with tunable size, morphology and composition, surface modification, and increased functionality provide considerable opportunities for effective wastewater treatment. Thus, in this work, an attempt has been made...
Article
Triclosan (TCS) is an antifungal and antimicrobic component used in various cosmetic, healthcare, and personal care products; therefore, many people are exposed to this compound. Literature and related studies have shown inflammatory skin conditions and endocrine disruption after exposure to TCS. Low concentrations of TCS released into environmenta...
Article
CsPbBr3 quantum dot (PQD) was interfaced with CdS quantum dot (QD), via modified hot injection method to form a heterostructure, across whose interface a significantly enhanced charge transfer is demonstrated. Formation of heterostructure (with retention of individual characteristics) was evidenced by various spectroscopy, microscopy and DFT tools....
Chapter
This chapter presents the background and contemporary research accomplishments dealing with smart architectural devices, photovoltaics. The evolution of photovoltaic devices, developments with open challenges, and future opportunities are analyzed and elaborated along with their response characteristic models and variations in graphical analysis. T...
Article
Of all the quantum dots, CsPbBr3 perovskite quantum dots (CPQDs) have been extensively studied for sensing and photocatalysis because of their desired photophysical properties such as optical absorption, high quantum yield and narrow emission bands. However their photo, thermal and aqueous instability has limited their use in real time applications...
Article
The search for non-toxic and non-heavy metal absorbers for solar cells is attracting lot of attention and this research has led to development of many non-toxic nanocrystal absorbers that have...
Article
Full-text available
Successful integration of perovskite cell with silicon cell to form a tandem solar device has shown tremendous potential for outperforming the state-of-the-art single junction silicon devices. This tandem approach has enabled high efficiencies up to 29% within a short period of time and one can find sufficient work and various strategies being appl...
Article
The work reported here exploits the extraordinary features of Graphene Nanoribbons (GNR) and well‐known conductive Polypyrrole (PPy) polymer to develop a very good electrochemically active composite for sensing metal ions. A strong hydrogen bond and pi‐pi interaction between the two components facilitates an enhanced conductive 3D network that has...
Article
Quantum dot sensitized solar cells (QDSSC) are up-and-coming low cost third-generation solar cells technology. The distinctive properties of quantum dots (QDs) feature QDSSC as an optimistic future of photovoltaics. The real concern with these devices is the wide band gap semiconductors used as the electron transport layer. Electron transport layer...
Article
Full-text available
This study demonstrates that the gasoline can be used as a co-solvent towards the modification of feedstock such as waste cooking oil for the synthesis of biodiesel via transesterification reaction, where the gasoline is removed from the reaction solution after the treatment. Parametric studies including varying the amount of co-solvent with respec...
Article
In the realm of perovskite-based solar cells, the quest for lead-free absorber materials is the epicenter of research. The search has led to the development of various lead-free compounds that have the potential to deliver efficient, air-stable, low-cost, and environment-friendly perovskite solar cells. Inorganic lead-free halide double-perovskites...
Article
The present work reports the effective method for removal of dyes using graphene oxide (GO) and polysulfone (PSf) composite membranes. The membranes were prepared by phase inversion method using PSf with different concentrations of GO ranging from 1 to 4% and polyethylene glycol (PEG 4000 Da) was used as a pore forming agent. The prepared membranes...
Article
Though adsorption and separation processes using metal-organic frameworks (MOFs) for water treatment are highly promising, the disposal of adsorbed or rejected contaminants still remains a major challenge. Herein, we report photocatalytic (PC) MOF-embedded polysulfone (PSf) membranes for separation and degradation of those contaminants, thus provid...
Article
Considering the minus points of Polysulfide redox electrolyte we explored Lanthanum Strontium Manganite to see the possibility of its usage in Quantum dot sensitized solar cells (QDSSCs) as electrolyte. Variations in material morphology synthesized via different methods and its effect on device performance and charge transfer dynamics across counte...
Article
Quantum dot sensitized solar cells (QDSSCs) can capably align with other emerging photovoltaic technologies, because of their ability to generate multiple excitons, availability of dynamic absorption ranges, and power conversion efficiency approaching 15% and beyond. Although the light-harvesting ability of these QDSSCs has increased dramatically,...
Article
Building compatible surface on perovskite quantum dots (PQDs) for applications like sensing analytes in aqueous medium is highly challenging and if achieved by simple means can revolutionize disease diagnostics. In this context, this work reports the surface engineering of CsPbBr3 QDs via “simple ligand exchange process” to achieve water-compatible...
Article
Application of nanostructured polymeric membranes for wastewater treatment is growing exceptionally because of their tunable functionalities, size, composition and morphology which offer immense opportunities for wastewater treatment. Here, for the first time, pyrochlore-type ternary metal oxides are explored as ceramic fillers to prepare mixed mat...
Article
Keywords: 1T-MoS 2 QDSSCs Bottom up and top down approach Functionalized MoS 2 A B S T R A C T 1 T phase of MoS 2 has been recently established as a high photo and electro active catalyst for hydrogen generation and energy storage applications. The present study explores the possibility of utilizing its enhanced features for photovoltaic applicatio...
Article
Coronavirus pandemic has created havoc in the world. COVID-19 is now officially labeled as Severe Acute Respiratory Syndrome-related Coronavirus-SARS-CoV-2. Therefore, it is equally important to combat the virus both inside the human body as well as in the environment. These viruses, being RNA viruses, are found to be susceptible to ozone. Ozone be...
Article
Meeting the increasing global energy demand has pushed the energy storage research towards developing energy dense and safer electrochemical energy storage devices following sustainable and economic approach. In this regard,...
Chapter
Photocatalysis is gaining significant interest as an efficient process for several applications, such as hydrogen and oxygen production, degradation of toxic chemicals, CO2 reduction to produce hydrocarbons, and bacterial disinfection. The properties of photocatalysts are affected by several factors and modification in photocatalysts through anion...
Article
Quantum dot-sensitized solar cells (QDSSCs) have emerged as an attractive area of research, enabling the construction of efficient third-generation photoelectrochemical solar cells with a higher theoretical photon conversion efficiency of up to 44%. The power conversion efficiency (η) rates of several QDSSCs are lower than those of dye-sensitized s...
Article
Nanostructured transition metal dichalcogenides are demonstrated to be potential catalysts to produce molecular hydrogen through electroreduction of water. Finding an efficient and cost-effective catalyst as a substitute for a platinum-based catalyst for sustainable hydrogen production is still a major issue, more so for large-scale production. Her...
Conference Paper
Full-text available
We report the development of iron-based metal organic frameworks (Fe-MOFs) for the effective simultaneous detection of metal ions such as Cd 2+ , Pb 2+ and Cu 2+ in aqueous medium via electrochemical method. The XRD pattern indicated that the synthesized Fe-MOF belongs to the family of MIL-101(Fe) MOFs. The SEM images showed that the formed Fe-MOFs...
Article
Herein, we report a facile, large-scale synthesis approach to develop near-superhydrophobic crystalline single phase aluminium hydroxide (Al(OH)3/AH) particles via surface-grafting mediated functionalization using vinyltrimethoxysilane. The obtained XRD pattern and ATR-IR spectrum of the functionalized-AH (F-AH) showed the characteristic peaks corr...
Article
TiO2 nanoparticles (NPs), functionalized poly vinyl chloride (PVC) and polysulfone (PSf) were assembled together in different compositions to fabricate composite membranes with potential application in Cr (VI) and antifouling treatment. Here, TiO2 nanoparticles were synthesized via sol-gel process and Poly vinyl chloride chemically altered with 4-a...
Article
Oxidation stability is one of the most significant fuel quality standards for biodiesel and mainly distresses the stability of biodiesel. Therefore, the present work aims to report the Eucalyptus oil (EO) as a natural green antioxidant additive to evaluate the oxidation stability of biodiesel produced from dairy waste scum, Bauhinia variegata and B...
Article
The rapid, ultra-low detection, degradation and complete removal of pesticides demands the design of potential substrates. Herein, we discussed gold nanorods (Au NRs) as the potential substrate for the naked eye detection and degradation of two common and broad-spectrum pesticides; Chlorpyrifos (CPF) and Malathion (MLT) upto 0.15 ppt concentration...
Article
The perovskite family is comprised of a great number of members because of the possible flexible substitution of numerous ions in its system. These compounds have a broad range of applications due to their outstanding optoelectronic properties in solar cells, photodetectors, lasers, and light-emitting diodes (LEDs). Perovskite nanocrystals (PNCs) a...
Article
Polysulphide has proven to be an efficient electrolyte for QDSSC, but at the cost of corroding the counter electrode and degrading the sensitizer due to its high redox potential. In this view for the first time, we have used oxide nanoceramics as low cost, easily processable and highly porous solid-state electrolytes for QDSSCs. High residual poros...
Article
Inorganic cesium lead halide (CsPbX3, X = Cl, Br, I) perovskite quantum dots (PQDs) have recently attracted tremendous attention for optoelectronic and photonic applications. Here in we demonstrate a facile ligand exchange (LE) method to tune the band structure of CsPbBr3 nanocrystals (NCs) together with encapsulation of these NCs within TiO2 (TiO2...
Article
Counter electrodes are critical components of third generation solar cells. A simple strategy of utilizing isostructural analogue of graphene, namely 2D molybdenum di-sulphide as nanohybrid with CuS as counter electrode is explored in this work. Formation of heterostructure photoanode with CdSe/CdS quantum dots along with nano-hybrid counter electr...
Article
The potential of filter paper as a substrate material and 4-aminophenyl sulfone (APS) as a novel monomer for TFC fabrication is explored for the first time. A novel polyamide selective layer was developed using APS and trimesoyl chloride by interfacial polymerization, whereas the control TFC was prepared by replacing APS with m-phenylenediamine. Fo...
Article
CdSe/CdS core shelled quantum dots (QDs) were prepared by colloidal synthesis using a binary ligand system and a non-coordinating, reusable solvent n-octadecane (nOD). Both the synthesis of CdSe and CdSe/CdS core shelled quantum dots were achieved by hot injection technique at much lower temperatures than reported earlier. The use of binary ligand...
Article
This work attempts to address the challenge of trace level detection of uranyl ions using highly fluorescent perovskite quantum dots. The fluorescent probe CsPbBr3 perovskite quantum dots (PQDs) in toluene, synthesized via hot-injection method allows complete fluorescence quenching within seconds detecting ppb level concentration of uranyl ions. Th...
Article
Full-text available
An electrochemical sensor is described for the determination of catechol (CT) based on the nanocomposite of lanthanum cobaltite supported on graphene nanosheets (LaCo/GNS). The nanocomposite was systematically examined by various analytical and spectroscopic methods. The LaCo/GNS-modified electrode exhibites good electrochemical activity towards CT...
Article
In this study, a new colorimetric chemosensor based on intramolecular charge transfer was designed for the qualitative and quantitative detection of uranyl ions at trace concentrations in environmental water samples. The probe exhibited color change from colorless to red upon binding with uranyl ions at physiological pH. This color change offered a...
Article
Prostate cancer is one of the primary causes of death around the world. As an important drug, flutamide has been used in the clinical diagnosis of prostate cancer. However, the over dosage and improper discharge of flutamide could affect the living organism. Thus, it necessary to develop the sensor for detection of flutamide with highly sensitivity...
Article
Full-text available
The study demonstrates the preparation of MnFe2O4 impregnated chitosan-microspheres (CMMS) as adsorbents for efficient removal of cationic thiazine dye, methylene blue. A facile approach with great economic and technical advantages to obtain highly crystalline manganese ferrite nanoparticles by solution combustion method is accounted. CMMS were cha...
Article
Two metal free organic dyes (TPCTh and TPCRh) with D-A-π-A configuration, having 3-cyanopyridine as auxiliary acceptor, thiophene π-linkers along with triphenylamine donor and cyanoacetic acid /rhodanine-3-acetic acid anchoring groups were successfully synthesized and utilized as sensitizers in the fabrication of dye-sensitized solar cells (DSSCs)....
Article
In this article, we investigated the role of potassium and Lithium hydroxide (KOH & LiOH) as precipitating agents on the physiochemical properties and electrochemical performance of MgCo2O4. Uniform cubic particles were obtained using lithium hydroxide. When LiOH was used as precipitating agents, discrete nanoparticles with uniform particle size we...
Article
A novel polymer poly(4,4′‐biphenylene sulfonyl succinamide) (PBSS) was synthesized via polycondensation reaction. Succinyl chloride and 4‐aminophenyl sulfone were used as reactive monomers and anhydrous AlCl3 was used as a catalyst. Both polysulfone (PSf) and PBSS were dissolved in N‐methyl‐2‐pyrrolidone (NMP) at different compositions to obtain a...
Article
The study demonstrates the fabrication of test strips made from newly synthesized ortho-Vanillin based colorimetric chemosensor (probe P) that could be employed as field deployable tool for rapid and naked eye detection of Cu²⁺. Upon addition of Cu²⁺ to the chemosensor, it exhibits rapid pink color from colorless and can be easily seen through the...
Article
The rapid quantification of drugs in biological samples has turned the hottest issue and ongoing challenge to protect human health. To address this issue, we designed and synthesized a tin phosphate entrapped graphene flakes (SnP/GRF) nanocomposite for the trace level electrochemical detection of antituberculosis drug isoniazid (ISZ). Moreover, the...
Article
Micrococcal nuclease (MNase) is an extracellular endo nuclease of Staphylococcus aureus (S. aureus). It digests single stranded nucleic acid. The existence of MNase is the gold standard to identify S. aureus and its content. The present study reports the ultra high sensitive and selective fluorescence platform for MNase detection, designed and deve...
Article
Full-text available
Photocatalysis has been recognized to be a promising process for the energy and environmental applications. Eventually, photocatalytic materials are largely modified in their physical and chemical structures. The former involves the size and shape dependent properties, while the latter involves the process of doping, composites, co-catalyst loading...
Article
Full-text available
The semiconducting thin film materials are the main key elements in the fields of photonic, electronic and magnetic devices. The preparation of materials in the form of thin films allows easy incorporation into various through changing the properties of materials and reducing the size. The core benefits of thin film systems are cost reduction and e...
Article
In this article, we have reported a one-step scalable synthesis of MgCo 2 O 4 nanostructures as efficient anode material for Li-ion batteries and investigated the role of post-synthesis calcination temperature (400, 600 and 800 °C)on its physiochemical properties and electrochemical performances. The XRD pattern of the calcinated sample at 400 °C (...
Article
A new 2-methoxy-4,6-bis(4-(4-nitrostyryl)phenyl)nicotinonitrile (W-NO 2 ) has been synthesized and the photovoltaic performances in dye‐sensitized solar cells (DSSCs) are investigated by utilizing it as co-sensitizer dye. From the study, its molar extinction coefficient value is found to be much higher than the N719 and the co-sensitized DSSC devic...