Keggin型铬取代杂多阴离子/阴离子交换树脂的可见光催化性能

应用化学, 2014, 31(8): 965-970. doi: 10.3724/SP.J.1095.2014.30533

Keggin型铬取代杂多阴离子/阴离子交换树脂的可见光催化性能

李梦婷 ^1, , 刘海城 ^2, , 曾星 ^3, , 徐孝南 ^4, , 邹晓梅 ^5, , 华英杰 ^6, , 王崇太 ^7,

1.海南师范大学化学与化工学院海口571158

2.海南师范大学化学与化工学院海口571158

3.海南师范大学化学与化工学院海口571158

4.海南师范大学化学与化工学院海口571158

5.海南师范大学化学与化工学院海口571158

6.海南师范大学化学与化工学院海口571158

7.海南师范大学化学与化工学院海口571158

基金项目: the Innovative Programs for National College Students,China(201211658041) 海南省重点科技计划项目(ZDXM20130088,ZDXM2014099) the Key Science and Technology International Co-operation Foundation of Hainan Province,China(2012-GH004,KJHZ2014-08) 国家自然科学基金资助项目(21161007) the Key Science and Technology Project of Hainan Province(ZDXM20130088,ZDXM2014099) 海南省国际科技合作项目(2012-GH004,KJHZ2014-08) 国家大学生创新项目(201211658041) Supported by the National Natural Science Foundation of China(21161007)

关键词：铬取代杂多阴离子 , 可见光催化剂 , 罗丹明B降解 , 总有机碳 , D301R树脂

Visible Light Catalysis of Keggin-type Cr-Substituted Heteropolyanion/Anion Exchange Resin

Keywords： Cr (Ⅲ)-substituted heteropolyanion , visible photocatalyst , rhodamine B degradation , total organic carbon , D301R resin

将Keggin型铬取代磷钨杂多阴离子PW11O39 Cr(Ⅲ)(H2O)4-(PW11Cr)负载于弱碱性阴离子交换树脂D301R表面,制备了固体光催化剂PW11Cr/D301R,并以模型污染物罗丹明B(RhB)的降解为探针评估了该催化剂的可见光催化活性,讨论了光催化反应机理,同时考察了催化剂剂量、溶液pH值和溶液中常见离子对RhB可见光催化降解反应的影响以及催化剂的稳定性.实验结果表明,当PW11 Cr/D301R的剂量为100 mg时,10μmol/L RhB水溶液暴露在200 W金卤灯下进行照射,RhB完全降解所需的时间仅为30 min,比PW11Cr均相体系缩短了3倍;反应180 min总有机碳(TOC)去除率约为84％.催化剂剂量、溶液pH值和溶液中存在的Cl-、SO42-和PO43-对RhB光催化降解反应的速率均有一定影响.催化剂循环实验显示经循环使用7次后催化剂的活性几乎没有损失.

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