Improvement of the photocatalytic hydrogen production activity of g-C3N4 by doping selenides as cocatalysts
| Autor: | Feng-Ming Zhang, Hong Dong, Dou-Dou Yang, Xiao-Jun Sun, Jin-Zhi Wei, Hong-Liang Tang, Jing-Li Sheng, Xin Zhang |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Photoluminescence Mechanical Engineering Doping 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials law Photocatalysis General Materials Science Lamellar structure Calcination 0210 nano-technology Carbon nitride Hydrogen production |
| Zdroj: | Materials Science in Semiconductor Processing. 85:76-82 |
| ISSN: | 1369-8001 |
| DOI: | 10.1016/j.mssp.2018.05.024 |
| Popis: | Carbon nitride is emerging as leading candidate for photocatalyst which enables one to use light to drive hydrogen production reactions. However, noble-metal such as Pt was adopted to be effective co-catalyst to increase the activity of g-C3N4 in most reactions which is costly. Herein, a novel g-C3N4-based photocatalyst with NiSe2 and CoSe2 as cocatalysts (abbreviated as CN-CoNiSe) in absence of noble-metal applied in photocatalytic hydrogen production was devised with a lamellar structure through a calcination process of the mixture of Ni2+ doped ZIF-67 and g-C3N4 for the first time in this work. The optimum photocatalytic activity in hydrogen evolution for CN-CoNiSe photocatalysts with a Ni2+ doped ZIF-67 mass content in precursors of 5 wt% (854.1 μmol g−1 h−1) was up to 87.4 times as high as that of pure g-C3N4 (9.77 μmol g−1 h−1). The greatly improved photocatalytic activity of CN-CoNiSe photocatalysts was mainly attributed to the synergistic effect of NiSe2, CoSe2 and g-C3N4, which leads to enhanced charge transfer and separation rate based on the results of electrochemical experiments and photoluminescence. |
| Databáze: | OpenAIRE |
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