Visible-light-driven hydrogen production from water in a noble-metal-free system catalyzed by zinc porphyrin sensitized MoS 2 /ZnO
| Autor: | Hongwei Lu, Zhigang Zou, Yong-Hui Li, Zhenguo Ji, Zhi-Jun Ye, Ji-Ren Tu, Dapeng Cao, Yong-Jun Yuan, Zhen-Tao Yu, Bin Hu |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Process Chemistry and Technology General Chemical Engineering chemistry.chemical_element Zinc engineering.material Photochemistry Porphyrin Catalysis chemistry.chemical_compound chemistry Triethanolamine engineering Photocatalysis medicine Noble metal Visible spectrum medicine.drug Hydrogen production |
| Zdroj: | Dyes and Pigments. 123:285-292 |
| ISSN: | 0143-7208 |
| DOI: | 10.1016/j.dyepig.2015.08.014 |
| Popis: | Photocatalytic hydrogen production system using zinc oxide as a photocatalyst typically suffer from low efficiency because of the wide band gap of ZnO. Despite tremendous efforts, it is still a great challenge to design efficient visible-light-responsive ZnO-based photocatalysts for hydrogen production. Herein, a new system for visible-light-driven hydrogen evolution was constructed by using Zn(II)-5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin dye-sensitized MoS2/ZnO as a photocatalyst and triethanolamine as the sacrificial reductant. Even without any noble metal, the as-prepared composite photocatalyst loaded with 0.50 wt% MoS2 has a H2 production rate of 75 μmol h−1 g−1 under visible light irradiation (λ > 420 nm), and the turnover number with respect to zinc dye reaches 516 after 9 h visible light irradiation. This study might offer a new paradigm for constructing efficient, visible-light-responsive and noble-metal-free solar-to-H2 conversion system by using dye-sensitized semiconductor as the photocatalyst. |
| Databáze: | OpenAIRE |
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