WO3/g-C3N4光催化剂的制备及降解双酚A研究

Study on Preparation of WO3/g-C3N4 Photocatalysts and Its Effect on Degradation of Bisphenol A

利用光催化实现双酚A污染物的降解消除具有重要意义和研究潜力。石墨相氮化碳(g-C3N4)是一类新发现的具有可见光响应的半导体催化剂,在g-C3N4中添加了WO3可解决单一g-C3N4的反应活性较低的缺点。文章首先制备了不同含量的WO3/g-C3N4样品,再利用多种测试方法对WO3添加后的g-C3N4进行特性表征,明确了WO3对于g-C3N4催化性能提升的理论可能性,最后考察了WO3/g-C3N4催化剂对于降解罗丹明B(Rhodamine B,RhB)和甲基橙(Methyl Orange,MO)和双酚A(bisphenol A,BPA)的作用效果。结果表明,WO3的添加对于RhB和MO的降解影响很小,而对于BPA的降解提升很大,这可能与15%WO3/g-C3N4样品能产生较多的高活性羟基自由基有关。

It is significant to accomplish the degradation of Bisphenol A by photocatalysis and it also has a great research potential.Graphitephase carbon nitride(g-C3N4)is a new type semiconductor catalyst with visible light response.The addition of WO3 on g-C3N4 can solve the disadvantage of low activity for pure g-C3N4.In this work,WO3/g-C3N4 heterogeneous photocatalysts with different content of WO3 were prepared first.And then a variety of methods were used to reveal the characteristic of the WO3/g-C3N4 photocatalysts,thus determining the theoretical feasibility of the catalytic activity improving.Finally,the photodegradation of Rhodamine B(RhB),Methyl Orange(MO)and Bisphenol A(BPA)was performed to investigate the effect of WO3/g-C3N4 photocatalysts.The results showed that the addition of WO3 weakly impacted on the degradation of RhB and MO,while significantly improved the degradation of BPA.The possible reason was the more high active hydroxyl radicals(·OH)generated by the 15%WO3/g-C3N4 samples.