Defect-rich cobalt pyrophosphate hybrids decorated Cd0.5Zn0.5S for efficient photocatalytic hydrogen evolution: Defect and interface engineering
| Autor: | Yansu Wang, Zhong-Yong Yuan, Xian-Wei Lv, Jin-Tao Ren, Chen-Chen Weng, Li-Jiao Gao |
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| Rok vydání: | 2022 |
| Předmět: |
Interface engineering
Materials science Composite number chemistry.chemical_element Pyrophosphate Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry chemistry Chemical engineering Photocatalysis Hydrogen evolution Quantum efficiency Cobalt Hydrogen production |
| Zdroj: | Journal of Colloid and Interface Science. 606:544-555 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2021.08.041 |
| Popis: | Photocatalysts with highly efficient charge separation are of critical significance for improving photocatalytic hydrogen production performance. Herein, a cost-effective and high-performance composite photocatalyst, cobalt-phosphonate-derived defect-rich cobalt pyrophosphate hybrids (CoPPi-M) modified Cd0.5Zn0.5S is rationally devised via defect and interface engineering, in which the co-catalyst CoPPi-M delivers a strong interaction with host photocatalyst Cd0.5Zn0.5S, rendering Cd0.5Zn0.5S/CoPPi-M with a remarkably improved efficiency of charge separation and migration. Besides, Cd0.5Zn0.5S/CoPPi-M exhibits a hydrophilic surface with ample access to electrons and a strong reduction ability of electrons. Benefiting from these advantages, the integration of defect-rich cobalt pyrophosphate and Cd0.5Zn0.5S enables Cd0.5Zn0.5S/CoPPi-M−5% with high photocatalytic H2 production rate of 6.87 mmol g−1h−1, which is 2.46 times higher than that of pristine Cd0.5Zn0.5S, and the notable apparent quantum efficiency (AQE) is 20.7% at 420 nm. This work provides a promising route for promoting the photocatalytic performance of non-precious hybrid photocatalyst via defect and interface engineering, and advances energy-generation and environment-restoration devices. |
| Databáze: | OpenAIRE |
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