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Palladium Single Atoms on TiO 2 as a Photocatalytic Sensing Platform for Analyzing the Organophosphorus Pesticide Chlorpyrifos
Author(s) -
Ge Xiaoxiao,
Zhou Peng,
Zhang Qinghua,
Xia Zhonghong,
Chen Shulin,
Gao Peng,
Zhang Zhe,
Gu Lin,
Guo Shaojun
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201911516
Subject(s) - chlorpyrifos , photocatalysis , detection limit , palladium , pesticide , selectivity , chemistry , catalysis , materials science , nanotechnology , nuclear chemistry , chromatography , organic chemistry , agronomy , biology
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)/TiO 2 as a photocatalytic sensing platform to directly detect chlorpyrifos with high sensitivity and selectivity. PdSA/TiO 2 , prepared by an in situ photocatalytic reduction of PdCl 4 2− on the TiO 2 , 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/TiO 2 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.