期刊
RSC ADVANCES
卷 10, 期 63, 页码 38174-38183出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra06842j
关键词
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资金
- National Key R&D Program of China [2019YFC0408401, 2019YFC0408404]
- Postdoctor Science Foundation of China [2018M630275]
- Tianjin Key Science and Technology Program Foundation [18ZXSZSF00010, 19YFSLQY00060, 19PTZWHZ00030]
It is of great importance to design and fabricate heterojunction photocatalysts to improve photocatalytic performance. In this work, a novel ZIF-67/AgCl/Ag heterojunction photocatalyst was successfully synthesized by a facile chemical etching, deposition-precipitation, light-induced reduction approach. After chemical etching by a AgNO3 precursor, the crystal size of ZIF-67 decreased remarkably together with the replacement of Co2+ in the framework of ZIF-67 by Ag(+)via surface ion exchange. As a result, optical and electrochemical measurements indicated that the separation efficiency of light-induced electrons and holes obviously increased due to the formation of a ZIF-67/AgCl/Ag heterojunction and the surface plasmon resonance of Ag-0. Meanwhile, the corresponding kinetic rate constant of ZIF-67/AgCl/Ag was estimated to be 0.1615 min(-1), which was 17, 7.76 and 2.67 times as high as that of individual ZIF-67, AgCl and ZIF-67/AgCl, respectively. The ZIF-67/AgCl/Ag photocatalyst also exhibited good stability and reusability in the process of photodegradation. This work demonstrated a high efficiency photocatalyst for providing new sights into the preparation of a highly efficient MOF-based heterojunction photocatalyst and its potential applications in water purification.
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