摘要
以水热自组装法合成的新型杂多酸盐[PMo_8V_6O_(42)][Co(Phen)_2][Him]_2·2H_3O·3H_2O(1),通过红外光谱、拉曼光谱、紫外-可见光谱、光电子能谱和X粉末衍射等技术手段进行表征。以此物质为催化剂光催化降解亚甲基蓝染料废水。分别讨论催化剂投加量、亚甲基蓝废水初始浓度、废水溶液酸度(p H)对亚甲基蓝降解率的影响。实验结果表明:催化剂投加量为50 mg/L、亚甲基蓝初始浓度为4 mg/L、模拟废水溶液的初始p H=1、降解时间220 min时,废水降解率可达到99.2%。光催化动力学分析显示,以合成杂多酸盐为催化剂光催化降解亚甲基蓝废水降解过程满足一级动力学方程,该一级方程反应速率常数为0.0144 min^(-1),拟合常数为0.9918。另外,此催化剂还表现出较好的重复使用性能,连续使用5次后降解率仍为92.4%。
[ PMosV6042 ] [ Co（Phen） = ] [ Him] 2 ·2H3O·3H2O （ 1 ） was prepared by hydrothermal synthesis method and characterized by means of IR, Raman, UV, XRD and XPS. Its photocatalytic performance toward degradation of methylene blue wastewater was investigated. Under the optimized conditions, i. e. , catalyst dosage of 50 mg/L, 4 mg/L methylene blue at pH = 1 and the reaction time 220 min, 99.2% of the methylene blue is degraded photocatalytically. The kinetics of the photodegradation of methylene blue is satisfied by the pseudo-first-order equation, with a constant at 0. 0144 min-1, and fitting coefficient of 0. 9918. The photocatalyst also exhibits good reusability. The degradation rate for methylene blue still keeps at 92.4% after 4 recycles.
出处
《应用化学》
CAS
CSCD
北大核心
2016年第5期577-582,共6页
Chinese Journal of Applied Chemistry
基金
吉林省科技厅项目(20130101033JC)~~
关键词
水热自组装
杂多酸盐
亚甲基蓝
光催化
降解率
hydrothermal
polyoxometalate salt
methylene blue
photocatalysis
degradation
