Coralline-like Ni2P decorated novel tetrapod-bundle Cd0.9Zn0.1S ZB/WZ homojunctions for highly efficient visible-light photocatalytic hydrogen evolution
| Autor: | Xipeng Pu, Changhua Su, Hong Lai, Yanling Geng, Zhuwang Shao, Xiaozhen Ren, Hong Li, Dafeng Zhang, Xiao Meng |
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| Rok vydání: | 2021 |
| Předmět: |
Morphology (linguistics)
Photoluminescence Materials science Surface photovoltage 02 engineering and technology General Medicine 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Spectral line 0104 chemical sciences law.invention Catalysis Chemical engineering law Photocatalysis Calcination 0210 nano-technology |
| Zdroj: | Chinese Journal of Catalysis. 42:439-449 |
| ISSN: | 1872-2067 |
| DOI: | 10.1016/s1872-2067(20)63597-5 |
| Popis: | In this study, Ni2P-Cd0.9Zn0.1S (NPCZS) composites were synthesized by coupling tetrapod bundle Cd0.9Zn0.1S (CZS) and coralline-like Ni2P (NP) via a simple calcination method. CZS shows outstanding activity in photocatalytic hydrogen evolution (1.31 mmol h−1), owing to its unique morphology and heterophase homojunctions (ZB/WZ), which accelerate the separation and transfer of photogenerated charges. After coupling with NP, the photoactivity of NPCZS was enhanced, and the maximum hydrogen evolution rate of 1.88 mmol h−1 was reached at a NP content of 12 wt%, which was 1.43 times higher than that of pure CZS. The experimental results of the photocatalytic activity, viz. photoluminescence spectra, surface photovoltage spectra, and electrochemical test showed that the enhanced photoactivity of NPCZS should be attributed to the synergistic effects of the novel tetrapod-bundle morphology, heterophase homojunctions, and decoration of the NP co-catalyst. Moreover, the as-prepared NPCZS composites exhibited excellent photostability and recyclability. Herein, we propose a possible mechanism for the enhanced photocatalytic activity. |
| Databáze: | OpenAIRE |
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