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Keggin型铬取代的磷钨杂多阴离子/二氧化钛纳米膜光催化剂的制备及可见光催化性能

邹晓梅 ,  陈艳 ,  朱兴旺 ,  刘高鹏 ,  郭心玮 ,  雷琴 ,  柯小雪 ,  李帅星 ,  华英杰 ,  王崇太

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引用本文: 邹晓梅, 陈艳, 朱兴旺, 刘高鹏, 郭心玮, 雷琴, 柯小雪, 李帅星, 华英杰, 王崇太. Keggin型铬取代的磷钨杂多阴离子/二氧化钛纳米膜光催化剂的制备及可见光催化性能[J]. 应用化学, 2016, 33(3): 320-329. doi: 10.11944/j.issn.1000-0518.2016.03.150258 shu
Citation:  ZOU Xiaomei, CHEN Yan, ZHU Xingwang, LIU Gaopeng, GUO Xinwei, LEI Qin, KE Xiaoxue, LI Shuaixing, HUA Yingjie, WANG Chongtai. Preparation of the Keggin Type Chromium Substituted Phosphotungstates/Titanium Dioxide Nano Film and Its Visible Photocatalytic Performance[J]. Chinese Journal of Applied Chemistry, 2016, 33(3): 320-329. doi: 10.11944/j.issn.1000-0518.2016.03.150258 shu

Keggin型铬取代的磷钨杂多阴离子/二氧化钛纳米膜光催化剂的制备及可见光催化性能

  • 1.

    海南师范大学化学与化工学院 海口 571158

    • 通讯作者: 王崇太,教授;Tel:0898-65730357;E-mail:wct581@sina.com;研究方向:光电催化;华英杰,教授;Tel:0898-65730357;E-mail:521000hua282@sina.com;研究方向:无机功能材料; 王崇太,教授;Tel:0898-65730357;E-mail:wct581@sina.com;研究方向:光电催化;华英杰,教授;Tel:0898-65730357;E-mail:521000hua282@sina.com;研究方向:无机功能材料
  • 基金项目:

    国家自然科学基金（21161007) 

    海南省国际科技合作重点项目（2012-GH004，KJHZ2014-08) 

    海南省应用技术研究与开发专项（ZDXM20130088，ZDXM2014099) 

    国家大学生创新项目（201411658027) 

    海南省大学生创新项目（20140055） 

摘要: 以钛酸四丁酯Ti（OC4H9）4为TiO2前驱体，Keggin型铬取代的杂多阴离子PW11Cr为可见光活性组分，采用溶胶-凝胶提拉法在玻片表面制备了PW11Cr/TiO2纳米膜光催化剂，并用UV-Vis DRS、IR、XRD、SEM和TEM等技术手段对催化剂的光吸收性质、化学组成、晶相和表面结构形貌等进行了表征；讨论了膜中PW11Cr和TiO2相互作用的方式；以染料模型污染物RhB的可见光催化降解为探针，评估了PW11Cr/TiO2光催化剂的可见光催化活性，讨论了光催化反应机理，并与TiO2的光催化反应机理进行了比较；考察了焙烧温度、PW11Cr剂量和溶液pH值对光催化活性的影响；最后用RhB的循环降解实验评估了催化剂的光催化稳定性。实验结果表明，PW11Cr/TiO2光催化剂对可见光有明显吸收，较低焙烧温度（100℃）下得到的膜为无定形结构，而较高焙烧温度（500℃）为纳晶结构；前者的光催化活性较高，在200 W金卤灯照射下降解10 μmol/L RhB，120 min的降解率为95%，4 h的COD去除率为72%；羟基自由基是导致RhB降解的主要氧活性物质；低的膜处理温度，高的PW11Cr负载量和溶液酸性有利于提高PW11Cr/TiO2膜的光催化活性；经循环重复使用10次，PW11Cr/TiO2膜的光催化活性仅有较少损失。

English

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  • 收稿日期:  2015-07-21
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