通过在BiVO₄上连续负载还原氧化石墨烯（rGO）和Au，成功合成出Au/rGO/BiVO₄三元复合材料。采用多种表征手段对材料的理化性质展开系统研究。结果表明，BiVO₄为十边形单斜晶系，rGO负载在BiVO₄外部，Au颗粒镶嵌在rGO上形成异质结。研究了Au/rGO/BiVO₄对亚甲基蓝和四环素的光降解作用。rGO的存在促进了电子转移，而Au则促进了可见光的吸收，提高了光催化活性。因此，Au/rGO/BiVO₄在可见光照射下表现出比rGO/BiVO₄和BiVO₄更强的光降解性能。

Au/rGO/BiVO₄, a ternary composite, is successfully synthesized by supporting the reduced graphene oxide (rGO) and gold on BiVO₄ in succession.The composite is characterized by various techniques to study its structure.Results show that BiVO₄ shows a decagonal-shaped monoclinic system, rGO is loaded on the outer of BiVO₄.Gold particles decorate onto rGO to form a heterojunction.The photodegradation of as-synthesized Au/rGO/BiVO₄ to methylene blue and tetracycline is studied.The existence of rGO promotes electron transfer, while gold facilitates the absorption of visible light to improve the photocatalytic activity.Therefore, Au/rGO/BiVO₄ shows a greater photodegradation performance than both rGO/BiVO₄ and BiVO₄ under the irradiation of visible light.

Umair Muhammad(1998-),男,硕士生,研究方向为BiVO₄基材料的合成及光催化降解,muhammadumair@mail.dlut.edu.cn