Дас Абинаш
Московский институт электроники и математики им. А.Н. Тихонова
Профессиональные интересы
Должности
- Научный сотрудник — Московский институт электроники и математики им. А.Н. Тихонова, Департамент электронной инженерии
Био
- · Начал работать в НИУ ВШЭ в 2025 году.
- · Научно-педагогический стаж: 1 год 5 месяцев.
Образование
- 2021 · PhD: Национальный технологический институт Силчар
- 2015 · Магистратура: Национальный технологический институт Силчар, специальность «Прикладная физика», квалификация «Магистр наук»
Опыт работы
- · 2015 - 2021: Национальный технологический институт, Силчар, Индия
- · 2021 - 2022: Индийский технологический институт, Мадрас, Индия
Конференции (1)
Показать все
- · 2022: Международный научный форум FIT-M 2022 (Москва). Доклад: Photocatalysis: Feasible Solar Energy Application for Environmental Remediation
Идентификаторы исследователя
- ORCID:
0000-0001-7715-2617 - ResearcherID:
ABA-6351-2021 - Google Scholar: https://scholar.google.com/citations?hl=en&user=ZyXjZ-cAAAAJ
- Scopus AuthorID:
57193439148
Публикации (6)
The origin of enhanced photocatalytic performance in titanium dioxide via niobium doping: From experimental assessments to DFT insights
2026 · ARTICLE · en
Niobium-doped TiO2 (Nb-TiO2), demonstrates dual functionality as an efficient photocatalyst for dye degradation and a promising photoelectrocatalyst for water oxidation. Nb incorporation via a facile hydrothermal method was confirmed by XRD (Rietveld refinement), XPS, TEM, FT-IR, Raman, and BET analyses, indicating successful lattice doping and structural modification. Photocatalytic dye degradation experiments were conducted using a model organic dye under ultra-violet light irradiation. The niobium-doped TiO2 exhibited significantly enhanced photocatalytic activity over 98 % degradation of model dyes under UV light, compared to 43.8 % and 66 % for pristine TiO2, demonstrating its potential as an effective photocatalyst for dye degradation. In photoelectrochemical water splitting, a high oxidation current density of 0.56 mAcm−2 at a lower overpotential of 0.47 V vs. Ag/AgCl was obtained. DFT analysis revealed a narrowed bandgap and enhanced charge density distribution with Nb doping, supporting the experimental observations of improved photocatalytic and photoelectrochemical activity. Thus, an integration of photocatalytic dye degradation and photoelectrocatalytic harmoniously serves toward a sustainable approach for both environmental cleanup and clean energy generation.
Highly Oriented Nitrogen-Doped Flower-like ZnO Nanostructures for Boosting Photocatalytic and Photoelectrochemical Performance: A Combined Experimental and DFT Study
2025 · ARTICLE · en
A facile method to modify the ZnO catalyst by nitrogen doping and synthesis of a highly oriented flower-like structure is reported. The generated system exhibits an enhanced photoinduced charge separation through the lightning rod effect. A well-aligned structure and high aspect ratio of ZnO nanorods is confirmed by the XRD, FESEM and TEM analyses. Efficient photogenerated charge transfer is achieved upon light irradiation, as confirmed by PL and EIS studies. Density functional theory (DFT) calculations provide an atomistic understanding of the modified electronic structure of N-doped ZnO. N-doped ZnO with 5 wt % exhibits the best photocatalytic performance. When applied to the photoelectrochemical water splitting, the optimal catalyst can achieve a remarkable photocurrent density of 4.0 mAcm–2 at the lowest onset potential of 0.61 V vs Ag/AgCl (1.40 V vs RHE). The reported work demonstrates that rational design of doped materials opens up new avenues for catalyst development.
Electrostatic Self-Assembly-Driven Heterojunction of Cubic CeO2/g-C3N4 Nanosheets for Efficient Photocatalytic Hydrogen Evolution and Photoelectrocatalytic Water Splitting: A Hybrid Experimental and Theoretical Study
2025 · ARTICLE · en
Nanohybrid catalysts hold great promise for photocatalysis and photoelectrocatalysis, with significant progress still to be made. We synthesize a graphitic carbon nitride (GCN)–CeO2 heterojunction via electrostatic self-assembly. Characterization confirms that CeO2 nanocubes are uniformly anchored onto layered GCN, forming a high-quality interface with abundant active sites. This architecture facilitates efficient separation of photogenerated charge carriers and an improved optical response, as further supported by density functional theory and finite-difference time-domain simulations, which reveal a modified band structure and optical response at the type-II heterojunction interface. The resulting hybrid exhibits excellent water splitting performance, with a photocurrent density of 5.70 mA cm–2 at a low onset potential of 0.43 V vs Ag/AgCl. The GCN–CeO2 photocatalyst shows an enhanced hydrogen evolution rate of 809.23 μmol g–1 h–1, which is 6.7 times higher than that of pure CeO2 and 3.2 times higher than that of the GCN photocatalyst. The reported findings highlight the promising potential of electrostatic self-assembly as an effective strategy for the development of efficient catalysts for solar fuel production.
Enhancement of Photocatalytic and Photoelectrochemical Performance of ZnO by Mg Doping: Experimental and Density Functional Theory Insights
2023 · ARTICLE · en
Doped ZnO nanostructures have shown great potential for solar energy applications. Considering the compatible ionic radius, Mg atoms can be doped into ZnO at different concentrations. The current work reports a combined experimental and DFT study on the influence of Mg dopant concentration on ZnO performance simultaneously for photocatalytic dye removal and photoelectrochemical water splitting. Among all the samples, Mg(3)-ZnO (3 at% Mg) exhibits superior sunlight-driven photocatalytic performance. The optimal Mg-ZnO shows an 8-fold increase in the photocatalytic activity compared to the pristine ZnO. Likewise, the most active photocatalyst shows high photoelectrochemical performance with a photocurrent response of 1.54 mA at the lowest onset potential, 11 times higher than the pristine ZnO. Tuning of the Mg content results in generation of extra charge carriers and a reduced recombination rate, which are the crucial factors responsible for enhanced photocatalytic and photoelectrochemical performance.
Mn-Modified ZnO Nanoflakes for Optimal Photoelectrochemical Performance Under Visible Light: Experimental Design and Theoretical Rationalization
2023 · ARTICLE · en
Doping of zinc oxide (ZnO) with manganese (Mn) tunes mid-bandgap states of ZnO to enhance its optical properties, and makes it into an efficient photoactive material for photoelectrochemical water splitting, waste removal from water, and other applications. We demonstrate that ZnO modified with 1 at.% Mn exhibits the best performance, as rationalized by experimental, structural and optical characterization, and theoretical analysis. ZnO doped with the optimal Mn content possesses improved light absorption in the visible region and minimizes charge carrier recombination. The doping is substitutional and creates mid-gap states near the valence band. Mn atoms break localized charge traps at oxygen vacancy sites and eliminate photoluminescence peaks associated with oxygen vacancies. The optimal performance of Mn-modified ZnO is demonstrated with photodegradation of Congo red and photoelectrochemical water splitting.
Ag-modified ZnO nanorods and its dual application in visible light-driven photoelectrochemical water oxidation and photocatalytic dye degradation: A correlation between optical and electrochemical properties
2022 · ARTICLE · en
In this work, Ag-ZnO composite was prepared at different weight percentages using a modified hydrothermal method for application to the photoelectrochemical (PEC) water oxidation and photocatalytic dye degradation. The resulting samples were studied using structural, surface, optical and photoelectrochemical (PEC) characterization methods. The surface plasmon resonance (SPR) of the optimal catalyst played an essential role in the synergistic improvement of the optical response and the photoinduced charge carrier separation process. The optimal Ag modified ZnO (3 wt% of Ag) showed superior photocatalytic and water oxidation performance. The inclusion of Ag has also played a vital role in the defect concentration and the Schottky junction at the metal–metal oxide interface. As a result, the PEC behavior of the optimal samples showed drastic improvements in terms of water oxidation current response under visible light illumination. Consequently, the photocatalytic performance of the samples also exhibits a linear relationship with the PEC water oxidation performance. The PEC and photocatalytic performance of the optimal sample showed almost five and seven times superior performance than the pristine ZnO in terms of photocurrent value and rate constant value, respectively. This can be attributed to the existence of the Schottky junction leading to the minimum charge transfer resistance and better charge transport across the interface. The superiority of the optimal sample is explained in terms of the physicochemical properties and electrochemistry of the material. To the best of the authors’ knowledge, this is the first report on the role of optimal Ag content in ZnO for its dual application. The combined study offering complete information, the work provides guidelines for noble metal-modified catalyst research moving forward.
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