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OALib Journal期刊
ISSN: 2333-9721
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布洛芬固定膜tio2光催化降解特性研究
DOI: 10.3969/j.issn.1000-2006.2013.04.017, PP. 90-94
Keywords: 布洛芬,固定膜,光催化,二氧化钛
Abstract:
采用小型光催化反应装置,以溶胶-凝胶法负载于玻璃纤维网上的固定膜tio2为催化剂对布洛芬(ibp)进行光催化降解,分析了吸附、光解、ibp初始浓度、溶液初始ph和投加h2o2剂量对tio2催化剂降解布洛芬的影响,并考察了ibp的矿化过程,对ibp降解中间产物进行定性分析。结果表明:吸附作用和在uv365下光解作用对降解布洛芬的影响不明显;ibp在较低浓度范围内,其降解呈伪一级反应,反应速率常数随初始浓度增大而减小;随着溶液初始ph的增大,ibp的光催化降解速率逐渐降低;h2o2投加剂量对ibp光催化降解影响显著,这是ibp在水中存在状态和tio2界面电荷性质受到ph影响所致,为提高光催化降解布洛芬速率,较适宜的h2o2投加剂量为2.5mg/l左右。光催化对ibp有较好的矿化作用。lc-ms分析表明,？oh攻击作用是ibp光催化降解的基本途径。
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