Mn掺杂TiO_2可见光催化降解水中Microcystin-LRVisible-light Photocatalytic Performance for the Degradation of Microcystin-LR in Water with Mn Doped TiO_2 Nanomaterial
王菲凤;
摘要(Abstract):
采用溶胶-凝胶法制备Mn掺杂改性的TiO_2纳米光催化剂,研究其可见光催化降解水中MC-LR的效果和动力学机理分析.结果表明:随水中MC-LR初始质量浓度增加,反应速率减小;投加此催化剂0.2 g·L(-1),对初始质量浓度0.1 mg·L(-1),对初始质量浓度0.1 mg·L(-1)的MC-LR水溶液可见光反应12 h后,降解率几乎达100%,矿化度为50.87%,且光催化反应过程符合准一级动力学,其降解表观速率常数为0.132 0 h(-1)的MC-LR水溶液可见光反应12 h后,降解率几乎达100%,矿化度为50.87%,且光催化反应过程符合准一级动力学,其降解表观速率常数为0.132 0 h(-1),矿化速率为0.047 5 h(-1),矿化速率为0.047 5 h(-1);FT-IR分析证实了,MC-LR光催化是吸附和化学氧化降解两个过程的协同作用.Mn-TiO_2纳米材料成为可见光催化去除水体中MC-LR高效节能的新方法.
关键词(KeyWords): Mn掺杂;TiO_2;可见光催化;矿化;MC-LR
基金项目(Foundation): 福建省科技厅高校产学研课题(2016Y4002);; 福建省科技重大专项专题(2015YZ0001-1)
作者(Authors): 王菲凤;
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