Metal chalcogenide based photocatalysts decorated with heteroatom doped reduced graphene oxide for photocatalytic and photoelectrochemical hydrogen production
| Autor: | Ali Rıza Özkaya, Seda Yılmaz, Fatma Karaca, Özlem Uğuz, Rana Muhammad Zunain Ayaz, Cevat Sarioglu, Duygu Akyüz, Atıf Koca |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Chalcogenide Heteroatom Oxide Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences law.invention chemistry.chemical_compound symbols.namesake law Hydrogen production Renewable Energy Sustainability and the Environment Graphene Doping 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Fuel Technology chemistry symbols Photocatalysis 0210 nano-technology Raman spectroscopy |
| Zdroj: | International Journal of Hydrogen Energy. 44:18836-18847 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2019.04.049 |
| Popis: | Heteroatom (N, B and P) doped reduced graphene oxide (RGO)-metal chalcogenide nanocomposites (RGO-Cd0.60Zn0.40S) were prepared by the solvothermal method, and then they were characterized with X-ray diffraction, Raman spectroscopy, transmission electron microscopy, high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, UV-Vis diffuse reflectance spectroscopy and photoluminescence techniques. Doping of RGO with heteroatoms of N, B and P increased charge-transfer capability of nanocomposites and thus, improved both photocatalytic and photoelectrochemical hydrogen production activities of them. N-doped RGO-Cd0.60Zn0.40S photocatalyst exhibited the highest photocatalytic hydrogen production rate (1114 mu molh(-1) g(-1)) in photocatalytic (PC) system amongst other and it was 1.5 times higher than that of RGO-Cd0.60Zn0.40S photocatalyst. Having a current density of 0.92 mAcm(-2), photoelectrochemical hydrogen production activity of N-RGO-Cd0.60Zn0.40S electrode was found to be 3 times higher than RGO-Cd0.60Zn0.40S photoelectrode without any applied bias potential under visible light irradiation in photoelectrochemical system. In general, these results clearly showed that heteroatom doping of RGO led to promising materials for renewable hydrogen production in the photocatalytic and photoelectrochemical systems. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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