Somnath Dhawale | Dr.Babasaheb Ambedkar Marathwada University (original) (raw)

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Papers by Somnath Dhawale

Research paper thumbnail of Noble metal-free CZTS electrocatalysis: synergetic characteristics and emerging applications towards water splitting reactions

Frontiers in chemistry, May 30, 2024

This review provides a comprehensive overview of the production and modification of CZTS nanopart... more This review provides a comprehensive overview of the production and modification of CZTS nanoparticles (NPs) and their application in electrocatalysis for water splitting. Various aspects, including surface modification, heterostructure design with carbon nanostructured materials, and tunable electrocatalytic studies, are discussed. A key focus is the synthesis of small CZTS nanoparticles with tunable reactivity, emphasizing the sonochemical method's role in their formation. Despite CZTS's affordability, it often exhibits poor hydrogen evolution reaction (HER) behavior. Carbon materials like graphene, carbon nanotubes, and C 60 are highlighted for their ability to enhance electrocatalytic activity due to their unique properties. The review also discusses the amine functionalization of graphene oxide/CZTS composites, which enhances overall water splitting performance. Doping with non-noble metals such as Fe, Co., and Ni is presented as an effective strategy to improve catalytic activity. Additionally, the synthesis of heterostructures consisting of CZTS nanoparticles attached to MoS 2-reduced graphene oxide (rGO) hybrids is explored, showing enhanced HER activity compared to pure CZTS and MoS 2. The growing demand for energy and the need for efficient renewable energy sources, particularly hydrogen generation, are driving research in this field. The review aims to demonstrate the potential of CZTS-based electrocatalysts for high-performance and cost-effective hydrogen generation with low environmental impact. Vacuum-based and non-vacuum-based methods for fabricating CZTS are discussed, with a focus on simplicity and efficiency. Future developments in CZTS-based electrocatalysts include enhancing activity and stability, improving charge transfer mechanisms, ensuring cost-effectiveness and scalability, increasing durability, integrating with renewable energy sources, and gaining deeper insight into reaction processes. Overall, CZTS-based electrocatalysts show great promise for sustainable hydrogen generation, with ongoing research focused on improving performance and advancing their practical applications.

Research paper thumbnail of Photocatalysts for hydrogen evolution

IOP Publishing eBooks, Mar 1, 2024

Research paper thumbnail of Multiwalled carbon nanotubes decorated with molybdenum sulphide (MoS2@MWCNTs) for highly selective electrochemical picric acid (PA) determination

Applied surface science, Mar 1, 2024

Research paper thumbnail of Polyaniline based highly selective electrochemical sensor for ascorbic acid determination: Performance studies towards real sample analysis

Journal of industrial and engineering chemistry/Journal of Industrial and Engineering Chemistry - Korean Society of Industrial and Engineering Chemistry, Feb 1, 2024

Research paper thumbnail of CTAB-Assisted Synthesis of FeNi Alloy Nanoparticles: Effective and Stable Electrocatalysts for Urea Oxidation Reactions

Research paper thumbnail of Interface Engineering of SRu-mC3N4 Heterostructures for Enhanced Electrochemical Hydrazine Oxidation Reactions

Catalysts

Hydrazine oxidation in single-atom catalysts (SACs) could exploit the efficiency of metal atom ut... more Hydrazine oxidation in single-atom catalysts (SACs) could exploit the efficiency of metal atom utilization, which is a substitution for noble metal-based electrolysers that results in reduced overall cost. A well-established ruthenium single atom over mesoporous carbon nitride (SRu-mC3N4) catalyst is explored for the electro-oxidation of hydrazine as one of the model reactions for direct fuel cell reactions. The electrochemical activity observed with linear sweep voltammetry (LSV) confirmed that SRu-mC3N4 shows an ultra-low onset potential of 0.88 V vs. RHE, and with a current density of 10 mA/cm2 the observed potential was 1.19 V vs. RHE, compared with mesoporous carbon nitride (mC3N4) (1.77 V vs. RHE). Electrochemical impedance spectroscopy (EIS) and chronoamperometry (i-t) studies on SRu-mC3N4 show a smaller charge-transfer resistance (RCt) of 2950 Ω and long-term potential, as well as current stability of 50 h and 20 mA/cm2, respectively. Herein, an efficient and enhanced activi...

Research paper thumbnail of Bi 2 O 3 @Bi nanoparticles for ultrasensitive electrochemical determination of thiourea: monitoring towards environmental pollutants

Electrochimica Acta, 2021

Thiourea and other sulphur containing organic molecules are commonly present in industrial waste ... more Thiourea and other sulphur containing organic molecules are commonly present in industrial waste water and because of their toxic nature are environmental pollutants. Thiourea oxidation constructed on cost effective and proficient catalyst to substitute/alternative with noble metals (Pt, Au, Ir, Rh, Pd and others) based electrodes. Herein, this report for the synthesis of Bi 2 O 3 @Bi ( ∼4-5 nm) nanoparticles by using polyfunctional citric acid is a surface protecting molecule for electrocatalytic thiourea oxidation reactions as a one of the environmental hazardous monitoring system at room temperature. These as-synthesized nanoparticles were well characterized by scanning electron microscopy (SEM), Furrier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA) and further studied for electrochemical determination of thiourea (TU). These structural and morphological studies were further confirms the rhombohedral crystal structure with thermogravimetric analysis (TGA) shows 20 wt% citrate molecules on the surface of Bi 2 O 3 @Bi nanoparticles. The electrochemical studies on Bi 2 O 3 @Bi nanopar- ticle reveals that, it’s having ultra-low detection limit, higher sensitivity and better activity at ultralow potential for a current density of 11.2 mA/cm 2 for oxidation of thiourea (TU). Moreover, chronoamphro- metric (i-t) measurement shows proposed Bi 2 O 3 @Bi based system is having stable and long term current performance at a potential of 0.85 V vs. SCE towards the TU oxidation. This work affords with noble metal free electrocatalyst for novel appliance and remarkable consequence as a thiourea determination and conversion as a part of waste management.

Research paper thumbnail of Noble metal-free CZTS electrocatalysis: synergetic characteristics and emerging applications towards water splitting reactions

Frontiers in chemistry, May 30, 2024

This review provides a comprehensive overview of the production and modification of CZTS nanopart... more This review provides a comprehensive overview of the production and modification of CZTS nanoparticles (NPs) and their application in electrocatalysis for water splitting. Various aspects, including surface modification, heterostructure design with carbon nanostructured materials, and tunable electrocatalytic studies, are discussed. A key focus is the synthesis of small CZTS nanoparticles with tunable reactivity, emphasizing the sonochemical method's role in their formation. Despite CZTS's affordability, it often exhibits poor hydrogen evolution reaction (HER) behavior. Carbon materials like graphene, carbon nanotubes, and C 60 are highlighted for their ability to enhance electrocatalytic activity due to their unique properties. The review also discusses the amine functionalization of graphene oxide/CZTS composites, which enhances overall water splitting performance. Doping with non-noble metals such as Fe, Co., and Ni is presented as an effective strategy to improve catalytic activity. Additionally, the synthesis of heterostructures consisting of CZTS nanoparticles attached to MoS 2-reduced graphene oxide (rGO) hybrids is explored, showing enhanced HER activity compared to pure CZTS and MoS 2. The growing demand for energy and the need for efficient renewable energy sources, particularly hydrogen generation, are driving research in this field. The review aims to demonstrate the potential of CZTS-based electrocatalysts for high-performance and cost-effective hydrogen generation with low environmental impact. Vacuum-based and non-vacuum-based methods for fabricating CZTS are discussed, with a focus on simplicity and efficiency. Future developments in CZTS-based electrocatalysts include enhancing activity and stability, improving charge transfer mechanisms, ensuring cost-effectiveness and scalability, increasing durability, integrating with renewable energy sources, and gaining deeper insight into reaction processes. Overall, CZTS-based electrocatalysts show great promise for sustainable hydrogen generation, with ongoing research focused on improving performance and advancing their practical applications.

Research paper thumbnail of Photocatalysts for hydrogen evolution

IOP Publishing eBooks, Mar 1, 2024

Research paper thumbnail of Multiwalled carbon nanotubes decorated with molybdenum sulphide (MoS2@MWCNTs) for highly selective electrochemical picric acid (PA) determination

Applied surface science, Mar 1, 2024

Research paper thumbnail of Polyaniline based highly selective electrochemical sensor for ascorbic acid determination: Performance studies towards real sample analysis

Journal of industrial and engineering chemistry/Journal of Industrial and Engineering Chemistry - Korean Society of Industrial and Engineering Chemistry, Feb 1, 2024

Research paper thumbnail of CTAB-Assisted Synthesis of FeNi Alloy Nanoparticles: Effective and Stable Electrocatalysts for Urea Oxidation Reactions

Research paper thumbnail of Interface Engineering of SRu-mC3N4 Heterostructures for Enhanced Electrochemical Hydrazine Oxidation Reactions

Catalysts

Hydrazine oxidation in single-atom catalysts (SACs) could exploit the efficiency of metal atom ut... more Hydrazine oxidation in single-atom catalysts (SACs) could exploit the efficiency of metal atom utilization, which is a substitution for noble metal-based electrolysers that results in reduced overall cost. A well-established ruthenium single atom over mesoporous carbon nitride (SRu-mC3N4) catalyst is explored for the electro-oxidation of hydrazine as one of the model reactions for direct fuel cell reactions. The electrochemical activity observed with linear sweep voltammetry (LSV) confirmed that SRu-mC3N4 shows an ultra-low onset potential of 0.88 V vs. RHE, and with a current density of 10 mA/cm2 the observed potential was 1.19 V vs. RHE, compared with mesoporous carbon nitride (mC3N4) (1.77 V vs. RHE). Electrochemical impedance spectroscopy (EIS) and chronoamperometry (i-t) studies on SRu-mC3N4 show a smaller charge-transfer resistance (RCt) of 2950 Ω and long-term potential, as well as current stability of 50 h and 20 mA/cm2, respectively. Herein, an efficient and enhanced activi...

Research paper thumbnail of Bi 2 O 3 @Bi nanoparticles for ultrasensitive electrochemical determination of thiourea: monitoring towards environmental pollutants

Electrochimica Acta, 2021

Thiourea and other sulphur containing organic molecules are commonly present in industrial waste ... more Thiourea and other sulphur containing organic molecules are commonly present in industrial waste water and because of their toxic nature are environmental pollutants. Thiourea oxidation constructed on cost effective and proficient catalyst to substitute/alternative with noble metals (Pt, Au, Ir, Rh, Pd and others) based electrodes. Herein, this report for the synthesis of Bi 2 O 3 @Bi ( ∼4-5 nm) nanoparticles by using polyfunctional citric acid is a surface protecting molecule for electrocatalytic thiourea oxidation reactions as a one of the environmental hazardous monitoring system at room temperature. These as-synthesized nanoparticles were well characterized by scanning electron microscopy (SEM), Furrier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA) and further studied for electrochemical determination of thiourea (TU). These structural and morphological studies were further confirms the rhombohedral crystal structure with thermogravimetric analysis (TGA) shows 20 wt% citrate molecules on the surface of Bi 2 O 3 @Bi nanoparticles. The electrochemical studies on Bi 2 O 3 @Bi nanopar- ticle reveals that, it’s having ultra-low detection limit, higher sensitivity and better activity at ultralow potential for a current density of 11.2 mA/cm 2 for oxidation of thiourea (TU). Moreover, chronoamphro- metric (i-t) measurement shows proposed Bi 2 O 3 @Bi based system is having stable and long term current performance at a potential of 0.85 V vs. SCE towards the TU oxidation. This work affords with noble metal free electrocatalyst for novel appliance and remarkable consequence as a thiourea determination and conversion as a part of waste management.