Photoelectrochemical Investigation of Hole Scavengers for Photocatalytic Hydrogen Evolution Reaction on Perovskite-Type Niobate Nanosheets Bengisu Yilmaz, Uğur Ünal Chemphotochem, 2025 Hole‐scavengers are a crucial part of particulate photocatalytic systems. The use of hole‐scavengers increases the photocatalytic activity by preventing electron‐hole recombination. The holes are used in photo‐oxidation of the hole‐scavenger molecules increasing the probability of electrons involved in photoreduction of water. In this study, different hole‐scavengers utilized in photocatalytic water splitting reaction were tested. The impact of different hole scavengers on photocatalytic reactions were investigated on [Ca2Nb3O10]− 2D nanosheets mechanistically. Cyclic voltammetry and chronoamperometry tests were employed to assess the impact of hole scavengers on photocatalytic efficiency. The photoelectrochemical tests agree with the results of the photocatalytic reactions. Methanol and EDTA give the largest oxidation photocurrent and the best photocatalytic activity.
Enhanced Photocatalytic Properties of Restacked Unilamellar [SrTa2O7]2- Nanosheets of Aurivillius Phase Layered Perovskites Mohammadreza Khodabakhsh, Bengisu Yilmaz, Sadegh Firoozi, Davoud Fatmehsari Haghshenas, Ugur Unal ACS Omega, 2023 In the present work, unilamellar [SrTa2O7]2– perovskite nanosheets with variable lateral dimensions were synthesized via a high-yield, three-step liquid exfoliation route from layered Bi2SrTa2O9. The photocatalytic activity of the parent and exfoliated layered perovskites was evaluated for the photocatalytic dye degradation of Rhodamine B under UV light (254 nm) and reduction of water to H2 under the full solar spectrum. A comparative study of the photocatalytic behavior of unilamellar [SrTa2O7]2– perovskite nanosheets and parent layered structure showed a significant improvement in both hydrogen evolution (98.20 vs 3 μmol g–1) and Rhodamine B degradation time (180 vs 30 min), with the restacked nanosheets. The exfoliation of layered perovskites not only increases their specific surface area, providing more active sites, but also reduces the recombination probability of electrons and holes due to their unilamellar structure and reduced charge transport pathways. The synthesis and preparation of strong acid solids such as [SrTa2O7]2– perovskite nanosheets can be a promising approach for effective adsorption of pollutants with cationic nature and more efficient electron transfer between the dye and catalyst. Finally, the photocatalytic characteristics of the restacked unilamellar [SrTa2O7]2– nanosheets remained unchanged after three successive cycles of recycling–reusing.
RECENT SCHOLAR PUBLICATIONS
Insights into the synthesis and characterization of thiosemicarbazide and urea-based novel isotype II heterojunctions and their competing physicochemical properties in … S Hooshmand, B Yılmaz, U Ünal, MK Bayazıt International Journal of Hydrogen Energy 138, 903-913 , 2025 2025 Citations: 1
Photoelectrochemical Investigation of Hole Scavengers for Photocatalytic Hydrogen Evolution Reaction on Perovskite‐Type Niobate Nanosheets B Yilmaz, U Ünal ChemPhotoChem 9 (3), e202400297 , 2025 2025 Citations: 9
Machine learning–informed development of high entropy alloys with enhanced corrosion resistance HC Ozdemir, A Nazarahari, B Yilmaz, D Canadinc, E Bedir, R Yilmaz, ... Electrochimica Acta 476, 143722 , 2024 2024 Citations: 37
Understanding the enhanced corrosion performance of two novel Ti-based biomedical high entropy alloys HC Ozdemir, A Nazarahari, B Yilmaz, U Unal, HJ Maier, D Canadinc, ... Journal of Alloys and Compounds 956, 170343 , 2023 2023 Citations: 23
Enhanced Photocatalytic Properties of Restacked Unilamellar [SrTa 2 O 7 ] 2– Nanosheets of Aurivillius Phase Layered Perovskites M Khodabakhsh, B Yilmaz, S Firoozi, D Fatmehsari Haghshenas, U Unal ACS omega 8 (11), 10607-10617 , 2023 2023 Citations: 12
Evaluation of the electrochemical corrosion behavior of anodic aluminum oxide produced by the two-step anodization process B Yılmaz, G Hapçı Ağaoğlu, B Yüksel, G Orhan Anti-Corrosion Methods and Materials 67 (5), 509-518 , 2020 2020 Citations: 6
Synthesis and characterization of salt-impregnated anodic aluminum oxide composites for low-grade heat storage B Yilmaz, B Yüksel, G Orhan, D Aydin, Z Utlu International Journal of Minerals, Metallurgy and Materials 27 (1), 112-118 , 2020 2020 Citations: 19
MOST CITED SCHOLAR PUBLICATIONS
Machine learning–informed development of high entropy alloys with enhanced corrosion resistance HC Ozdemir, A Nazarahari, B Yilmaz, D Canadinc, E Bedir, R Yilmaz, ... Electrochimica Acta 476, 143722 , 2024 2024 Citations: 37
Understanding the enhanced corrosion performance of two novel Ti-based biomedical high entropy alloys HC Ozdemir, A Nazarahari, B Yilmaz, U Unal, HJ Maier, D Canadinc, ... Journal of Alloys and Compounds 956, 170343 , 2023 2023 Citations: 23
Synthesis and characterization of salt-impregnated anodic aluminum oxide composites for low-grade heat storage B Yilmaz, B Yüksel, G Orhan, D Aydin, Z Utlu International Journal of Minerals, Metallurgy and Materials 27 (1), 112-118 , 2020 2020 Citations: 19
Enhanced Photocatalytic Properties of Restacked Unilamellar [SrTa 2 O 7 ] 2– Nanosheets of Aurivillius Phase Layered Perovskites M Khodabakhsh, B Yilmaz, S Firoozi, D Fatmehsari Haghshenas, U Unal ACS omega 8 (11), 10607-10617 , 2023 2023 Citations: 12
Photoelectrochemical Investigation of Hole Scavengers for Photocatalytic Hydrogen Evolution Reaction on Perovskite‐Type Niobate Nanosheets B Yilmaz, U Ünal ChemPhotoChem 9 (3), e202400297 , 2025 2025 Citations: 9
Evaluation of the electrochemical corrosion behavior of anodic aluminum oxide produced by the two-step anodization process B Yılmaz, G Hapçı Ağaoğlu, B Yüksel, G Orhan Anti-Corrosion Methods and Materials 67 (5), 509-518 , 2020 2020 Citations: 6
Insights into the synthesis and characterization of thiosemicarbazide and urea-based novel isotype II heterojunctions and their competing physicochemical properties in … S Hooshmand, B Yılmaz, U Ünal, MK Bayazıt International Journal of Hydrogen Energy 138, 903-913 , 2025 2025 Citations: 1
