Worm-like分子筛负载磷钨酸催化剂的制备及光降解甲基橙的性能研究  

Preparation of phosphotungstic acid supported Worm-like molecular sieve and its performance for methyl orange photocatalytic degradation

作　　者：美春[1] 王月林[1] 徐玲[1] 刘宗瑞[1] 

机构地区：[1]内蒙古民族大学化学化工学院,内蒙古通辽028043

出　　处：《环境污染与防治》2014年第12期27-30,共4页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.21261014);内蒙古自然科学基金资助项目(No.2012MS0207);内蒙古研究生科研创新资助项目(No.S20141013605)

摘　　要：以Worm-like分子筛为载体,采用浸渍法制备不同磷钨酸负载量的负载型催化剂,并采用傅里叶红外光谱(FT-IR)、X射线衍射(XRD)和N2吸附/脱附等手段对负载型磷钨酸催化剂进行表征。结果表明,磷钨酸成功负载在Worm-like分子筛上,且随着磷钨酸负载量的增加,FT-IR、XRD和N2吸附/脱附结果呈规律性变化。将该系列催化剂用于光催化降解甲基橙实验,结果表明,甲基橙质量浓度为20mg/L,磷钨酸负载量为70%(质量分数)时,甲基橙降解率为87.2%;回收催化剂并重复使用3次,甲基橙降解率仍达75%以上。Series supported catalysts were prepared using Worm-like molecular sieve as carrier to support different amount of phosphotungstic acid by impregnation method.The obtained catalysts were characterized by FT-IR,XRD and N2 adsorption-desorption method.The results showed that phosphotungstic acid was successfully supported on Worm-like molecular sieve,the spectra of FT-IR and XRD as well as N2 adsorption-desorption analysis results presented the regular changing rule with increasing the loading amount of phosphotungstic acid.Applied the catalyst for photocatalytic decomposition of methy orange,when the concentration of methy orange was 20 mg/L and the supported amount of phosphotungstic acid was 70%,the degradation rate of methy orange could reach to 87.2%.Recycling the catalyst for 3 times repeat use,the degradation rate of methyl orange was still more than 75%.

关 键 词：光催化 Worm-like分子筛 甲基橙 

分 类 号：X703[环境科学与工程—环境工程]