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Bi2WO6光催化剂的制备及其可见光降解性能研究
Preparation of Bi2WO6 Photocatalyst and Its Visible Light Degradation Performance
【摘要】 采用水热法制备花球状Bi2WO6,通过扫描电镜、X射线衍射和紫外-可见光吸收对其进行表征。研究可见光条件下,反应体系pH、亚甲基蓝初始浓度和助催化剂对Bi2WO6光降解亚甲基蓝的性能影响。研究结果表明:碱性条件下,Bi2WO6光降解亚甲基蓝性能较好,在pH=13,0.10 g Bi2WO6对10 mg/L亚甲基蓝,降解60 min降解率可达到98.25%。加入助催化剂可以显著提高光催化活性,担载2%Pt助催化剂光催化降解性能最好,在pH=13,0.10 g Bi2WO6对50 mg/L亚甲基蓝,降解90min降解率可达到86.15%,比单独Bi2WO6光催化剂提高了49.52%。
【Abstract】 Flower globular Bi2WO6 photocatalyst was prepared by hydrothermal method and characterized by SEM, XRD, and Uv-vis. The effects of pH, initial concentration of methylene blue and co-catalyst on the photodegradation of methylene blue by Bi2WO6 were studied under visible light conditions. The results showed that under alkaline conditions, Bi2WO6 exhibited excellent photo-degration methylene blue performance. At pH=13, the photo-degradation rate of 10 mg/L methylene blue over 0.10 g Bi2WO6 reached 98.25 % after reaction of 60 min. Also, the addition of co-catalyst can significantly improve the photocatalytic activity. And by supported 2 % Pt co-catalyst over Bi2WO6, at pH=13, the photo-degradation rate of 50 mg/L methylene blue over reached to 86.15 % after degradation for 90 min, which was 49.52 % higher than the Bi2WO6 photocatalyst alone.
【Key words】 Bi2WO6; Pt; methylene blue; photocatalyst; degradation;
- 【文献出处】 广东化工 ,Guangdong Chemical Industry , 编辑部邮箱 ,2019年17期
- 【分类号】O643.36;O644.1
- 【被引频次】1
- 【下载频次】193