A novel bismuth vanadate–silicon dioxide–graphene oxide (BiVO₄/SiO₂/GO) nanocomposite was synthesized successfully by using hydrothermal method. The as-prepared nanocomposite was characterized by various techniques, including X-ray diffraction (XRD), field emission scanning electron microscope (SEM), and Brunauer–Emmett–Teller (BET). The photocatalytic activity of nanoparticles was evaluated by measuring the removal efficiency of methylene blue (MB) in aqueous solution under visible light irradiation. The results indicated that BiVO₄, BiVO₄/SiO₂, and BiVO₄/SiO₂/GO exhibited the same diffraction peaks of monoclinic scheelite structure due to the higher content of BiVO₄ in the nanocomposite system. The BiVO₄ and BiVO₄/SiO₂ were uniformly agglomerated from irregular particles with the different level of aggregation and the size of several micrometers. In the meantime, BiVO₄ and SiO₂ particles were adhered firmly on the GO sheets in BiVO₄/SiO₂/GO nanocomposite. The BiVO₄/SiO₂/GO nanocomposite showed a much higher efficiency than the pure BiVO₄ and the BiVO₄/SiO₂ hybrid material for MB removal efficiency due to the considerably increased specific surface area and pore size by the adhesion of BiVO₄ and SiO₂ on GO sheets.

采用水热法成功合成了新型钒酸铋-二氧化硅-氧化石墨烯（BiVO ₄ / SiO ₂ / GO）纳米复合材料。制备的纳米复合材料具有多种技术特征，包括X射线衍射（XRD），场发射扫描电子显微镜（SEM）和Brunauer-Emmett-Teller（BET）。通过在可见光照射下测量水溶液中亚甲基蓝（MB）的去除效率来评估纳米颗粒的光催化活性。结果表明，BiVO ₄，BiVO ₄ / SiO ₂和BiVO ₄ / SiO ₂由于纳米复合体系中BiVO ₄含量较高，/ GO表现出相同的单斜白钨矿结构衍射峰。BiVO ₄和BiVO ₄ / SiO ₂从具有不同聚集程度和几微米大小的不规则颗粒均匀地团聚。同时，BiVO ₄和SiO ₂颗粒牢固地粘附在BiVO ₄ / SiO ₂ / GO纳米复合材料的GO片材上。与纯BiVO ₄和BiVO ₄ / SiO ₂相比，BiVO ₄ / SiO ₂ / GO纳米复合材料的效率要高得多。BiVO ₄和SiO ₂在GO片材上的粘附，显着增加了比表面积和孔径，从而提高了MB去除效率。