Sb2WO6/BiOBr 2D nanocomposite S-scheme photocatalyst for NO removal
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第21期
论文作者：Yanyu Wang Kai Wang Jinlong Wang Xiaoyong Wu Gaoke Zhang
摘 要：Photocatalysis technology is an efficient method for removing nitrogen oxides at low concentrations.Herein, dimension-matched Sb2WO6/BiOBr photocatalysts were synthesized at room temperature via precipitation-deposition way. Under visible light irradiation, the as-obtained Sb2WO6/Bi OBr photocatalysts showed enhanced photocatalytic performance compare with the pure Sb2WO6 and BiOBr for removal of NO. The optimal ratio for photocatalytic performance of Sb2WO6/BiOBr composite was found to be 30 wt.% of Sb2WO6, which showed excellent recycling property even after 5 runs. Moreover, in situ DRIFT was carried out to reveal the time-dependent evolution of reaction intermediates during photocatalytic NO oxidation. The probable photocatalytic mechanism was considered based on the active species capture experiments. The enhanced photocatalytic performance for the Sb2WO6/BiOBr composite photocatalyst perhaps is attributed to the interaction between BiOBr and Sb2WO6 and S-scheme charge transfer path.
Yanyu Wang，Kai Wang，Jinlong Wang，Xiaoyong Wu，Gaoke Zhang
Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology
摘 要：Photocatalysis technology is an efficient method for removing nitrogen oxides at low concentrations.Herein, dimension-matched Sb2WO6/BiOBr photocatalysts were synthesized at room temperature via precipitation-deposition way. Under visible light irradiation, the as-obtained Sb2WO6/Bi OBr photocatalysts showed enhanced photocatalytic performance compare with the pure Sb2WO6 and BiOBr for removal of NO. The optimal ratio for photocatalytic performance of Sb2WO6/BiOBr composite was found to be 30 wt.% of Sb2WO6, which showed excellent recycling property even after 5 runs. Moreover, in situ DRIFT was carried out to reveal the time-dependent evolution of reaction intermediates during photocatalytic NO oxidation. The probable photocatalytic mechanism was considered based on the active species capture experiments. The enhanced photocatalytic performance for the Sb2WO6/BiOBr composite photocatalyst perhaps is attributed to the interaction between BiOBr and Sb2WO6 and S-scheme charge transfer path.
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