Synthesis of Bi 2 WO 6 /g-C 3 N 4 photocatalyst and high degradation of Rhodamine B under visible light irradiation

作者：Wenjie Wang, Mengran Zhang, Binxia Zhao, Linxue Liu, Ruixuan Han, Nan Wang · 发表于：Pigment & Resin Technology · 年份：2021 · DOI：10.1108/prt-09-2020-0097 · 被引用次数：8 · 研究领域：Advanced Photocatalysis Techniques、Covalent Organic Framework Applications、Gas Sensing Nanomaterials and Sensors

Purpose The purpose of this paper is to improve the degradation efficiency of Rhodamine B (RhB) by new photocatalytic materials. Design/methodology/approach Binary Z-scheme g-C 3 N 4 /Bi 2 WO 6 photocatalytic material was synthesized by the one-step hydrothermal reaction. The construction of Z-scheme heterojunction led to the rapid separation of photogenerated electrons and holes, which would degrade RhB into small molecular substances to achieve the purpose of degradation. Findings It was found that Bi 2 WO 6 /25%g-C 3 N 4 displayed the highest photocatalytic activity, which was about 1.44 and 1.34 times higher than that of pure Bi 2 WO 6 and g-C 3 N 4 , respectively. According to the trapping experiments, the superoxide radical ( · O 2− ) was the major active species of the RhB decomposition in Bi 2 WO 6 /g-C 3 N 4 catalysts. Originality/value The successful synthesis of Z-scheme Bi 2 WO 6 /g-C 3 N 4 provides new ideas and references for the design of catalysts with high photocatalytic activity, which should have wide applications in the future.