在盐酸质子化条件下,采用超声微波协助法成功制备了可见光型复合催化剂WO₃/g-C₃N₄。利用X射线多晶粉末衍射仪(XRD)、扫描电镜(SEM)、透射电镜(TEM)、紫外可见漫反射(UV-Vis)和BET比表面测试仪对样品进行了表征,并以罗丹明B(RhB)为目标降解物对其光催化性能进行研究。结果表明:复合催化剂样品是由片状的WO₃纳米片负载在g-C₃N₄表面组成的。当WO₃负载的质量分数为40%时,前驱物在500℃条件下煅烧2 h后所得样品的光催化性能明显好于同条件下制得的单一相WO₃和g-C₃N₄,在可见光(波长大于420 nm)照射下,5 h内对100 mL浓度为10^-5 mol/L罗丹明B橙溶液的降解高达98%。

The WO₃/g-C₃N₄ composite visible photocatalysts were successfully synthesized by an ultrasound-microwave-protonation process using HCl solution as solvent. The prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) and Brunauer-Emmett-Teller (BET) specific surface area and photogradation of Rhodamine B (RhB) for visible-light properties. This results show that the composite catalysts are composed of WO₃ nanosheets loading on g-C₃N₄ nanoplates. When the mass fraction of WO₃ is 40%, the sample prepared by heating the precursor at 500℃ for 2 h has better photocatalytic activity than that prepared by pure WO₃ and g-C₃N₄. The WO₃/g-C₃N₄ can photodegradate 98% 100 mL RhB solution with concentration of 10^-5 mol/L after 5 h visible-light (wavelength is larger than 420 nm) irradiation.

四川省教育厅项目(13ZB0137);四川理工学院人才引进资助项目(2012RC05);四川省大学生创新基金(20131062230)。