β_2-SiW_(11)/TiO_2光催化剂的制备及光催化性能  

Preparation and photocatalytic performance of photocatalyst β_2-SiW_(11)/TiO_2

作　　者：马荣华[1] 丁玲玉 李晓宇[1] 

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006

出　　处：《印染助剂》2016年第12期7-10,18,共5页Textile Auxiliaries

基　　金：黑龙江省自然科学基金(B2007-15);黑龙江省教育厅基金(12531760);齐齐哈尔大学研究生创新基金(YJSCX2015-020X)

摘　　要：以杂多硅钨酸盐β_2-K8Si W_(11)O39·x H_2O作为活性组分,通过浸渍法将硅钨酸盐负载于二氧化钛上,制备复合光催化剂β_2-Si W_(11)/TiO_2。通过红外光谱、紫外光谱、热重分析(TG)、X射线光电子能谱(XPS)、X射线粉末衍射(XRD)和扫描电镜(SEM)对复合材料β_2-Si W_(11)/TiO_2进行表征。同时,以降解亚甲基蓝溶液为探针反应,评价其光催化性能。考察溶液p H、复合材料用量等对光催化活性的影响。结果表明,光催化剂β_2-Si W_(11)/TiO_2对于亚甲基蓝有很好的催化降解效果,相比二氧化钛和硅钨酸盐有很大的优势,起到了协同作用,亚甲基蓝溶液的降解率达到82.53%。The composite photocatalyst β2-SiW11/TiO2 was prepared by impregnating silicotungstate on ti- tanium dioxide by impregnation method, β2-K8SiW11O39·xH2O as active component. Then catalyst β2-SiW11/TiO2 were characterized by infrared spectroscopy （IR）, UV spectroscopy, thermal gravimetric （TG）, X-ray photoelectron spectroscopy （XPS）, X-ray diffraction （XRD） and scanning electron microscopy （SEM）. Meanwhile, the pho- tocatalytic activity of the catalyst was assessed using the photocatalytic degradation of methylene blue, a model pollutant, as a probe. The influences of the β2-SiW11/TiO2 dosage and the solution pH on the catalyst activity were examined. The results showed that compared with TiO2 and β2-K8SiW11O39·xH2O, β2-SiW11/TiO2 had the advantage, which played a synergistic effect. The degradation rate of methylene blue was 82.53%.

关 键 词：杂多硅钨酸盐 二氧化钛 光催化性能 亚甲基蓝 

分 类 号：X788[环境科学与工程—环境工程]