期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 1, 页码 232-236出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201911516
关键词
chlorpyrifos detection; hydrogen evolution reaction; photocatalysis; single-atom catalyst; titanium
资金
- Beijing Natural Science Foundation [JQ18005]
- National Key R&D Program of China [2016YFB0100201]
- National Natural Science Foundation of China [51671003]
- China Postdoctoral Science Foundation [2018M630021]
Traditional methods for analyzing organophosphorus pesticide chlorpyrifos, usually require the tedious sample pretreatment and sophisticated bio-interfaces, leading to the difficulty for real-time analysis. Herein, we use palladium single-atom (PdSA)/TiO2 as a photocatalytic sensing platform to directly detect chlorpyrifos with high sensitivity and selectivity. PdSA/TiO2, prepared by an in situ photocatalytic reduction of PdCl42- on the TiO2, shows much higher photocatalytic activity (10 mol g(-1) h(-1)) for hydrogen evolution reaction than Pd nanoparticles (1.95 mol g(-1) h(-1)), and excellent stability. In the presence of chlorpyrifos, the photocatalytic activity of PdSA/TiO2 decreases. Through this inhibition effect the platform can realize a detection limit for chlorpyrifos of 0.01 ng mL(-1), much lower than the maximum residue limit (10 ppb) permitted by the U.S. Environmental Protection Agency.
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