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Photo-catalytical Degradation of Diphenylarsinic Acid by TiO2 (P25)
Authors
滕应
王阿楠
骆永明
Publication date
1 January 2014
Publisher
Abstract
二苯砷酸(diphenylarsinic acid,DPAA)是经化学武器泄漏而产生的一种含苯基的有机砷化合物,具有较强的生物毒性,严重威胁生态环境的安全.目前关于降解DPAA方法的研究较少.前期研究发现利用光催化剂二氧化钛(P25)能快速降解DPAA,本实验在此基础上主要研究该催化剂对DPAA的吸附特征、光催化降解动力学及其影响因素,并利用活性氧猝灭剂实验进一步了解各活性氧基团在光反应中的贡献.结果表明,P25光催化降解DPAA可以分为表面吸附与光反应两个阶段,并可用Langmuir-Hinshelwood反应动力学模型拟合.溶液中离子强度和酸碱度的变化会引起光催化剂对DPAA吸附量的改变,..
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Last time updated on 29/11/2016