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徐珊,于艳,常亮亮,艾萧,陈经敏,袁澳铧,张宁.Bi₂MoO₆/纳米棒ZnO异质结对MB的可见光-压电协同降解性能研究[J].环境科学学报,2022,42(6):80-89

The enhanced degradation of methylene blue by Bi₂MoO₆ / ZnO nanorods heterojunction via synergistic visible light-piezoelectric effect

基金项目：陕西省高校青年创新团队：秦岭优势矿产资源开发及应用催化创新团队（陕教2020137号）；陕西省大学生创新创业训练计划项目（No.S202011396038）；商洛市科技计划项目（No.SK2019-82）；商洛学院应用催化科研团队项目（No.19SCX01）

摘要：采用水热法合成了一系列不同负载率的Bi₂MoO₆/纳米棒ZnO复合光催化剂.通过XRD、FT-IR、SEM、TEM、XPS、UV-Vis、EPR和PL等分析技术对合成的样品进行表征.在光/超声波条件下，以亚甲基蓝（MB）为目标降解物评价其压电-光催化性能.结果表明：Bi₂MoO₆/ZnO纳米棒（BZ-0.6）的降解速率常数约为ZnO传统光催化的9.25倍，其性能提升的主要原因在于ZnO的压电效应与Bi₂MoO₆/ZnO界面形成的异质结的耦合，有效地促进了电子和空穴的分离和转移.此外，同实验条件下，循环利用5次后Bi₂MoO₆/ZnO复合光催化剂降解率仍保持良好的稳定性.

Abstract：A series of Bi₂MoO₆/ZnO nanorods composite photocatalysts with different loading rates were synthesized by hydrothermal method. The synthesized samples were characterized with XRD， FT-IR， SEM， TEM， XPS， UV-Vis， EPR， and PL analysis techniques. Methylene blue （MB） was used as the target degradation product to evaluate its piezoelectric-photocatalytic performance under light/ultrasonic conditions. The results show that the degradation rate constant of Bi₂MoO₆/ZnO nanorods （BZ-0.6） is about 9.25 times higher than that of traditional ZnO photocatalysis. The main reason for the improvement of photocatalytic performance is the coupling of the piezoelectric effect of ZnO and the heterojunction formed at the interface of Bi₂MoO₆/ZnO， which effectively promotes the separation and transfer of electrons and holes. In addition， under the same experimental conditions， the degradation rate of Bi₂MoO₆/ZnO composite photocatalyst remained stable after 5 cycles.