采用一步水热法制备Bi2MoO6/BiVO4复合光催化剂。利用X射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、高分辨透射电子显微镜(HRTEM)等手段对其晶体结构和微观结构进行了表征。结果表明， Bi2MoO6纳米粒子沉积在BiVO4纳米片表面从而形成异质结结构。紫外-可见漫反射光谱(UV-Vis DRS)表明所制备的Bi2MoO6/BiVO4异质结较纯相Bi2MoO6和BiVO4对可见光吸收更强。由于形成异质结结构及其光吸收性能使Bi2MoO6/BiVO4光催化活性有较大提高。可见光下(λ>420 nm)光催化降解罗丹明B (RhB)实验结果表明， Bi2MoO6/BiVO4光催化活性较纯相Bi2MoO6和BiVO4高。 Bi2MoO6/BiVO4样品光催化性能提高的原因是Bi2MoO6和BiVO4形成异质结，从而有效抑制光生电子-空穴对的复合，增大了可见光吸收范围及比表面积。%A Bi2MoO6/BiVO4 photocatalyst with a heterojunction structure was synthesized by a one-pot hydrothermal method. Its crystal structure and microstructure were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM). The FESEM and HRTEM images indicated that Bi2MoO6 nanoparticles were loaded on the surface of BiVO4 nanoplates to form a heterojunction. The ultraviolet visible (UV-Vis) diffuse reflection spectra (DRS) showed that the resulting Bi2MoO6/BiVO4 heterojunction possessed more intensive absorption within the visible light range compared with pure Bi2MoO6 and BiVO4. These excel ent structural and spectral properties endowed the Bi2MoO6/BiVO4 heterojunction with enhanced photocatalytic activity. It was found that the Rhodamine B (RhB) degradation rate with Bi2MoO6/BiVO4 was higher than that with pure BiVO4 and Bi2MoO6 under visible light (λ>420 nm) by photocatalytic measurements. The enhanced photocatalytic performance of the Bi2MoO6/BiVO4 sample can be attributed to the improved separation efficiency of photogenerated hole-electron pairs generated by the heterojunction between Bi2MoO6 and BiVO4, intensive absorption within the visible light range, and high specific surface area.
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