Bi_2WO_6光催化剂的制备及其可见光降解性能研究

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英文篇名：Preparation of Bi2WO6 Photocatalyst and Its Visible Light Degradation Performance 作者：车鑫 ; 杜悦 英文作者：Che Xin;Du Yue;Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, College of Chemical Engineering and Modern Materials, Shangluo University; 关键词：Bi_2WO_6 ; 助催化剂 ; 亚甲基蓝 ; 光催化 ; 降解 英文关键词：Bi_2WO_6;;Pt;;methylene blue;;photocatalyst;;degradation 中文刊名：广东化工 英文刊名：Guangdong Chemical Industry 机构：商洛学院化学工程与现代材料学院陕西省尾矿资源综合利用重点实验室; 出版日期：2019-09-15 出版单位：广东化工 年：2019 期：17 基金：陕西省大学生创新创业训练计划项目(20172725);; 陕西省自然科学基金项目(2018JQ2071) 语种：中文; 页：30-32 页数：3 CN：44-1238/TQ ISSN：1007-1865 分类号：O643.36;O644.1

摘要

采用水热法制备花球状Bi_2WO_6,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Bi_2WO_6光降解亚甲基蓝的性能影响。研究结果表明:碱性条件下,Bi_2WO_6光降解亚甲基蓝性能较好,在pH=13,0.10 g Bi_2WO_6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 Bi_2WO_6对50 mg/L亚甲基蓝,降解90min降解率可达到86.15%,比单独Bi_2WO_6光催化剂提高了49.52%。
        Flower globular Bi_2WO_6 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 Bi_2WO_6 were studied under visible light conditions. The results showed that under alkaline conditions, Bi_2WO_6 exhibited excellent photo-degration methylene blue performance. At pH=13, the photo-degradation rate of 10 mg/L methylene blue over 0.10 g Bi_2WO_6 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 Bi_2WO_6, 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 Bi_2WO_6 photocatalyst alone.

引文

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