Subramanian Sakthinathan

National Taipei University of Technology · Department of Materials and Mineral Resources Engineering

Abstract: We described the use of a nanocomposite con-sisting of reduced graphene oxide and zinc tetraphenyl-porphyrin (RGO/Zn-TPP) for electrochemical sensing ofdopamine (DA). The surface of RGO was homogeneous-ly functionalized with Zn-TPP via non-covalentp-pinter-action. The nanocomposite was characterized by scanningelectron microscopy, UV-Vis...

A non-covalent functionalization based on a copper tetraphenylporphyrin/chemically reduced graphene oxide (Cu-TPP/CRGO) nanocomposite is demonstrated for selective determination of dopamine (DA) in pharmaceutical and biological samples. A homogeneous electron-rich environment can be created on the graphene surface by Cu-TPP due to the π-π non-coval...

A simple dopamine (DA) electrochemical sensor was developed based on a screen-printed carbon electrode (SPCE) modified with β-cyclodextrin entrapped graphite (GR/β-CD) composite for the first time. The polar hydroxyl groups on the β-CD rims interact with polar groups of edges of GR sheets resulting into the high dispersion ability of GR in β-CD sol...

The surfactant copper(II) complex, [Cu(sal-ala)(bpy)(DA)] (sal-ala = amino acid Schiff base, bpy = 2,2′-bipyridyl, DA = dodecylamine) has been synthesized and characterized by elemental analysis, UV–Vis, IR and EPR spectra. The critical micelle concentration (CMC) values of this surfactant copper(II) complex in aqueous solution was obtained from co...

Abstract: Hydrogen is the alternative renewable energy source for addressing the energy crisis, global warming, and climate change. Hydrogen is mostly obtained in the industrial process by steam reforming of natural gas. In the present work, CuCrO2 particles were attached to the surfaces of electrospun CeO2 nanofibers to form CeO2-CuCrO2 nanofibers...

Hydrogen can be employed as an alternative renewable energy source in response to climate change, global warming, and the energy problem. Methanol gas steam reforming (SRM) is the major method used in industry to produce hydrogen. In the SRM process, the catalyst nature offers benefits such as low cost, simplicity, and quickness. In this work, dela...

Nitrobenzene(NB) is frequently utilized in the production of numerous products and aromatic compounds. Highly toxic nitrobenzene (NB) and its derivatives mix with water resources and cause various serious effects on human health and the environmental ecosystem. It is vital to accurately detect highly dangerous aromatic nitro compounds in the water...

Electronic absorption spectroscopy was used to study the ETR of surfactant–cobalt(III) complexes containing imidazo[4,5-f][1,10]phenanthroline, dipyrido[3,2-d:2′-3′-f]quinoxaline and dipyrido[3,2-a:2′,4′-c](6,7,8,9-tetrahydro)phenazine ligands by using ferrocyanide ions in unilamellar vesicles of dipalmitoylphosphotidylcholine (DPPC) and 1-butyl-3-...

In this manuscript 'Feed two birds with one seed' strategy was followed to study the electrochemical ability and photocatalytic mineralization of pharmaceutical effluent nimesulide (NIM) drugs. Heterogeneous solid-direct Z-scheme catalysts have experienced many efforts in generating new materials to tackle environmental issues through exhibiting ap...

In this work, a graphitic carbon nitride/gadolinium molybdate (g-C3N4/Gd2MoO6) composite manufactured glassy carbon electrode (GCE) was used to detect nitrofurazone (NFZ) at the trace level. A quick and inexpensive electrochemical sensor for NFZ analysis is described in this paper. The material structure and properties were determined by scanning e...

In this article, both vanadium and copper elements have been anchored on graphitic carbon nitride (gCN) (denoted as V/Cu/gCN) via a thermal decomposition process as a novel nanosheet-photocatalyst for the removal of monocrotophos (MCP). The prepared nanosheet features were studied by utilizing XRD, UV-Visible absorption spectrometer, PL, FESEM, TEM...

The widespread use of carbendazim insecticides has caused substantial concerns to human health due to their coexistence, high toxicity, and persistence. Therefore, it is crucial to develop a carbendazim detection more important for the protection of both humans and the environment safety. A graphitic carbon nitride/europium molybdate ( g -C 3 N 4 /...

In this Research, the “Get the two Mangoes with one stone” strategy was utilized to investigate the electrochemical detection and photocatalytic removal of mercury ions (Hg²⁺) using vanadium pentoxide doped graphitic carbon nitride (V2O5-gCN) nanosheets for the first time. The proposed materials can be better choice for environmental issues. In thi...

Infectious outbreaks are the foremost global public health concern, challenging the current healthcare system, which claims millions of lives annually. The most crucial way to control an infectious outbreak is by early detection through point-of-care (POC) diagnostics. POC diagnostics are highly advantageous owing to the prompt diagnosis, which is...

Hydrogen (H2) is under consideration as an alternative renewable energy transporter due to the energy crisis and climate change. In this research, CuCrO2-CeO2 nanopowders catalysts were synthesized through the glycine nitrate process and utilized in the SRM process. The prepared CuCrO2-CeO2 nanopowders were characterized by different characterizati...

The binding interaction of surfactant cobalt(III) complex, cis-[Co(bpy)2(HA)2](ClO4)3, in which bpy is 2,2-bipyridine and HA is hexadecylamine or cetylamnine with DNA was through intercalative mode via the long aliphatic chains present in the ligands. The binding was investigated by various techniques, electronic absorption, fluorescence spectrosco...

A novel electrochemical sensor on ZIF‐8 nanocomposites (Ag/ZnO/ZIF‐8) was developed to analyze the mercury ions (Hg²⁺). The ZIF‐8 materials are one of the 3‐dimentional porous MOFs with highly accessible pores and great surface area, which was prepared via the simple sol‐gel methods and its physio‐chemical properties were characterized v...

To address climate change, the energy crisis, and global warming, hydrogen (H2) can be used as a potential energy carrier because it is clean, non-toxic and efficient. Today, the mainstream industrial method of H2 generation is steam reforming of methanol (SRM). In this process, a zinc-based commercial catalyst is usually used. In this work, a ZnO-...

Delafossite CuAlO2/AIN thin films have been prepared by a facile and affordable spin coating method. The main purposes of this experiment were to explore the preparation of CuO on AlN film by a spin coating method and to form CuAlO2 by high-temperature annealing and also to explore the properties resulting from different temperature treatments. The...

In this manuscript, “Get two mangoes with one stone” strategy was used to study the electrochemical detection and photocatalytic mineralization of furaltadone (FLT) drug using Cu/Ni/TiO2/MWCNTs nanocomposites for the first time. The bi-functional nanocomposites were synthesized through a hydrothermal synthesis technique. The successfully synthesize...

In this study, CuCrO2–CeO2 nanofibers were prepared by the electrospinning method and the influences of different concentrations on the properties of CuCrO2–CeO2 nanofibers were studied. The electrospun fibers were heated at 700 °C for 1 h in a decompression environment of 1.1 Torr to generate the CuCrO2–CeO2 nanofibers. The crystalline phase of th...

The key to utilizing renewable energy is the development of new promising materials for electrocatalytic water splitting. Boron-doped reduced graphene oxide/multiwalled carbon nanotubes (B-RGO-MWCNT) composite decorated with CuFeO2 complex modified glassy carbon electrode (GCE) was applied to the water electrolysis (HER). The B-RGO-MWCNT composite...

Environmental pollution is a major threat that increases day by day due to various activi-ties. A wide variety of organic pollutants enter the environment due to petrochemical ac-tivities. Organic contamination can be unsafe, oncogenic, and lethal. Due to environmen-tal issues worldwide, scientists and research communities are focusing their resear...

Due to global warming, the energy crisis, and climate change, hydrogen is to be used as an alternate renewable energy source. In industry, hydrogen generation is mainly obtained by the natural gas steam reforming reaction. In this study, delafossite CuYO2 nanopowder was used as a catalyst for methanol steam reforming (MSR). The delafossite-structur...

Anisotropic CuCrO2 thin films were successfully prepared on glass substrate by the electrospin-ning method followed by annealing at 600 °C. The directionality of the nanowires increased with increases in rotation speed. In addition, the structural formation and optoelectronic behav-ior of the CuCrO2 thin films have been studied by X-ray powder diff...

Delafossite CuCrO2 film was successfully prepared on a flexible plastic substrate using a heat transfer process. The metallic acetate of the first layer decomposed to form a carbonized layer for use as a release layer. The thin film was deposited on the first layer by chemical solution deposition and heat treated to form a CuCrO2 film. After that,...

A simple hydrothermal process has been used to prepare a carbon nanofiber/copper chromium dioxide (CNF/CuCrO2) composite for the selective detection of 4-nitrophenol (4-NP) and supercapacitor applications. The electrochemical sensor was developed with a glassy carbon electrode (GCE) modified with the CNF/CuCrO2 composite by the drop-casting method....

The CuAlO 2 delafossite complex was incorporated with nitrogen-doped reduced graphene oxide (N-rGO) and multiwalled carbon nanotubes (MWCNT) based nanocomposite (N-rGO-MWCNT/CuAlO 2 ) for the hydrogen evolution reaction (HER). The CuAlO 2 delafossite complex was made by self-combustion glycine nitrate process (GNP), and the N-rGO-MWCNT composite wa...

Hydrothermal synthesis of CuCrO 2 nanopowder for H 2 production by methanol steam reforming.

A glassy carbon electrode (GCE) coated with delafossite CuCrO2 loading on the nitrogen-doped reduced graphene oxide (N-rGO) and multiwalled carbon nanotubes (MWCNT) composite (N-rGO-MWCNT/CuCrO2) was applied to the hydrogen evolution reaction and Bisphenol-A (BPA) detection. First, the N-rGO-MWCNT composite was prepared by in situ chemical reductio...

Alacritous determination, linear dynamic range, quick response time, and selectivity are the pivotal indices for developing electrochemical sensors. The researchers in the society are interested in upgrading the electroanalytical performance of electroactive materials with its chemical components and structures. Therefore, we have successfully prep...

In the present study, a dopamine (DA) sensor was constructed based on a screen-printed carbon electrode (SPCE) combined with CuCrO2-TiO2 composite. The CuCrO2-TiO2 composite was prepared by a self-combustion glycine nitrate process (GNP) and used to the selective and sensitive detection of DA. The prepared CuCrO2-TiO2 composite-modified SPCE electr...

Designing supercapacitor devices using different active materials is an effective approach for the emergent development of materials in the energy storage applications at the current scenario. Herein, a series of materials, Bi2O3, Ag/Bi2O3, g-C3N4 and Ag/Bi2O3/g-C3N4 have been synthesized and characterized for the examination of supercapacitor appl...

Exploring the catalytic efficiency of ionic liquid supported on mesoporous material as heterogeneous organ catalysts for example, 1-Ethyl-3-methylimidazolium Triflate and 1- Ethyl-3-methylimidazolium chloride + AlCl3 (different ratio) immobilized on SBA-15 which contains 0.5% of platinum with regards to isomerization of n-pentane and n-hexane along...

A glassy carbon electrode (GCE) was modified with platinum (Pt)-supported ZSM-5 (GCE/ZSM-5/Pt) prepared by an ultrasonic-assisted hydrothermal method and applied to the electrochemical detection of cadmium (Cd²⁺) ions. Ultrasonic preparation is an emerging green technique for the preparation of active catalyst materials with enhanced optical, elect...

Methanol (CH₃OH) is a favorable fuel for direct methanol fuel cells (DMFCs) in compact devices. This work, we present a facile and simple approach to make divergent molar ratios uniform gold (Au) and palladium (Pd) nanoparticles (NPs) decoration on an activated graphite (AGR) electrode. The binary combination of these AGR/Au-Pd catalysts compositio...

Hydrogen (H2) is being considered as an alternate renewable energy carrier due to the energy crisis, climate change and global warming. In the chemical industry, hydrogen production is mainly accomplished by the steam reforming of natural gas. In the present study, CuFeO2–CeO2 nanopowder catalyst with a heterogeneous delafossite structure was prepa...

Bimetallic Mo-Ni was successfully impregnated on acidic mesoporous alumino-silicates supports. The acidic mesoporous alumino-silicates for instance, SBA-15, MAS, KIT-6, FSM-16 having Si/Al ratio = 10 were synthesized by post-grafting method. The effect of different mesoporous supports and active metals have been investigated through various charact...

A hollow nanostructure is attractive and important in different fields of applications, for instance, solar cells, sensors, supercapacitors, electronics, and biomedical, due to their unique structure, large available interior space, low bulk density, and stable physicochemical properties. Hence, the need to prepare hollow nanotubes is more importan...

Cerium vanadate resembling the shape of a hedgehog were interconnected with carbon nanofibers to give a heterostructure (referred to as CeV/CNF) that exhibits efficient catalytic activity for the electrochemical detection of the drug nilutamide (NLT). The heterostructure material and its modification were characterized by XRD, Raman spectra, XPS, F...

In the present work, a reduced graphene oxide and multiwalled carbon nanotube (RGO/MWCNTFe 3 O 4 ) composite decorated with Fe 3 O 4 magnetic nanoparticles was prepared as an electrochemical sensor. The surface morphology of the prepared composite was identified by scanning electron microscopy and X-ray diffraction. The electrochemical properties o...

Delafossite CuFeO2 anisotropic thin films were prepared by electrospinning method with rotating collector. The pure phase CuFeO2 anisotropic thin films were prepared by heat treatment at 773K in the air for 600 sec and 1023K under nitrogen for 600 sec. Besides, an electrospinning process rotation speed influence on the CuFeO2 film formation. The de...

Pr2NiO4 (PNO) powders were synthesized by the glycine-nitrite process (GNP) for use as the cathode in an intermediate-temperature (500-800°C) solid oxide fuel cell (IT-SOFC). When PNO powder was calcined at 1200°C for 1h, the pure single phase with good crystallization K2NiF4-type structure was obtained. Moreover, samarium doped ceria (Ce0.8Sm0.2O1...

Reduced graphene oxide/cupric oxide (RGO/CuO) composites were developed by a simple, eco-friendly sonochemical method. This system has been explored as a potential electrocatalyst towards the electrochemical detection of flutamide. The prepared RGO/CuO composite was confirmed by scanning electron microscopy, energy dispersive X-ray spectroscopy, X-...

In this present work, the delafossite type CuCr1-xFexO2 (x = 0–1) nanopowder was prepared by a self-combusted glycine nitrate process used for the steam reforming of methanol (SRM). The effectiveness of hydrogen production was upgraded by the preparation of CuCr1-xFexO2 (x = 0–1). The prepared Cu based materials were characterized by field emission...

In this study, CuAl2O4 submicron tubes were synthesized by using electrospun Al2O3 nanofibers as a template. The electrospun Al2O3 precursor fibers were heat treated to form Al2O3 nanofibers. The Al2O3 nanofibers were used as the template, and the CuO layer was deposited on the Al2O3 nanofibers were dropped with copper nitrate methooxyethanol solut...

Zirconium incorporated mesoporous SBA-15 silica with Si/Zr ratios of 10, 20, 30 and 40 have been synthesized under hydrothermal conditions. The prepared mesoporous materials were characterized by suitable physical and chemical characterization technique. Besides, the catalytic activity of the prepared SBA-15/ZrO2 (10–40%) catalyst was used for benz...

An active platinum loaded sulphated zirconia supported SBA-15 catalyst (Pt/SO4/ZrO2-SBA-15) was synthesized and characterized using scanning electron microscope, transmission electron microscope, N2adsorption-desorptionisotherms. The different percentage level (10, 20 and 30 wt.%) of ZrO2 was loaded on SBA-15 by precipitation of zirconium oxychlori...

Herein, we describe the innovative and simple voltammetric method based on the samarium oxide (Sm2O3) decorated functionalized multiwall carbon nanotubes (Sm2O3/f-MWCNTs) using as an electrode material for the detection of catechol (CC). The as-prepared Sm2O3/f-MWCNTs composite was confirmed by using scanning electron microscopy (SEM), energy dispe...

The development of highly selective and sensitive electrochemical sensor for miniatures level finding of poisonous organophosphorus pesticides (OPP) in food and aquatic system has turned a hottest issue to protect living things and ecosystem. For that reason, for the first time, we developed a novel electrochemical sensor for the trace level detect...

In this study, Pr2CuO4 was fabricated as a cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs) application. The Pr2CuO4 cathode was prepared using a solid-state reaction and an electrospinning technique. The prepared cathode material was characterized by the suitable characterization technique. The Pr2CuO4 was coated on...

In this report, we have successfully prepared hexaammine cobalt (III) coordination complex [Co(NH3)6]3+ grafted on the reduced graphene oxide (RGO) composite modified glassy carbon electrode (GCE) for the electrochemical determination of morin (MR). The RGO/[Co(NH3)6]3+ composite was prepared by simple sonochemical technique. The as-prepared inorga...

The countless use of antibiotics in veterinary and human medicine causes serious health risk to the both human and animals. In this context, monitoring of the antibiotic drug in the veterinary and human pathological system is an important and provokes a universal challenge. Therefore, development of simple and sensitive inorganic materials with uni...

In the present work, we have prepared ecofriendly reduced graphene oxide decorated copper (II) ethylenediamine complex ([Cu(en)2]2+) (en = ethylenediamine) modified glassy carbon electrode (GCE) for the electrochemical detection of hydroquinone (HQ). The as-prepared composite was characterized by the SEM, EDX, XRD, UV and FT-IR. Moreover, an electr...

Herein, we are described a green route to prepare reduced graphene oxide supported cobalt inorganic complex nanocomposite (GRGO/[Co(bpy)3]) (bpy = 2, 2′-bipyridine) through facile and wet chemical approach. The formation of the nanocomposite was confirmed through suitable physical and chemical characterization techniques. The GRGO/[Co(bpy)3] nanoco...

We have described a multiwalled carbon nanotube (MWCNT) supported [Cu(sal-ala)bpy] (sal-ala = salicylalanine-alanine, bpy = 2,2′-bipyridine) inorganic nanocomposite that was successfully prepared and applied for the selective detection of dopamine (DA). The prepared nanocomposite was characterized using scanning electron microscopy (SEM), elemental...

We have successfully prepared simple and sensitive ethylenediamine ligand based cobalt (II) inorganic complex ([Co(en)3] 2+) (en = ethylenediamine) modified glassy carbon electrode (GCE) and used for the electro chemical detection of Ellagic acid (EA). The prepared inorganic complex was characterized by the suitable physical and chemical characteri...

Cerium oxide nanoparticles (CeO2 NPs) are favorable in nanotechnology based on some remarkable properties. In this study, the crystalline CeO2 NPs are successfully prepared by an efficient microwave combustion (MCM) and conventional route sol-gel (CRSGM) methods. The structural morphology of the as-prepared CeO2 NPs was investigated by various spec...

Three dimensional graphene-multiwalled carbon nanotube nano composite (3DG/MWCNTs−Nc) was synthesized by simple hydrothermal method for the amperometric determination of caffeic acid (CA). The prepared nanocomposite was characterized by scanning electron microscopic technique (SEM), ultraviolet-visible spectroscopy (UV), Raman spectroscopy and infr...

A gold tetra phenyl porphyrin/reduced graphene oxide (RGO/Au–TPP) nanocomposite film modified glassy carbon electrode (GCE) was prepared for the trace level detection of hydrazine. The prepared nanocomposite was characterized by scanning electron microscopy, X-ray diffraction studies, transmission electron microscopy, ultraviolet-visible spectrosco...

A reduced graphene oxide/platinum(II) tetraphenylporphyrin nanocomposite (RGO/Pt-TPP)-modified glassy carbon electrode was developed for the selective detection of hydrazine. The RGO/Pt-TPP nanocomposite was successfully prepared via noncovalent π–π stacking interaction. The prepared nanocomposite was characterized using nuclear magnetic resonance,...