无机材料学报2017，Vol.32Issue(4)：365-371,7.DOI:10.15541/jim20160377
介孔TiO2/WO3空心球的制备及其可见光光催化性能
Preparation and Visible-light Photocatalytic Performance of Mesoporous Hollow TiO2/WO3 Spheres
摘要
Abstract
By using titanyl sulfate and ammonia metatungstate (AMT) as precursors and citric acid as a complexing agent,mesoporous hollow spheres of TiO2/WO3 composites were prepared via a two-step approach,which included a spray-drying process followed by a high-temperature calcination course.The morphologies,microstructures,surface area,crystal phase,and optical properties of the composites were characterized by SEM,TEM,BET,XRD and UV-Vis DRS.The results showed that the TiO2/WO3 composites were well-dispersed mesoporous hollow spheres with diameters around 1 μm,of which the wall consisted of nanoparticles and mesopores.What's more,nanoparticles and mesopores increased with the calcination temperature.UV-Vis DRS analysis showed that the absorption spectra of TiO2/WO3 composites could extend from ultraviolet region to visible region,which was helpful to improve the utilization efficiency of sunlight.In addition,photocatalytic activities of the prepared samples were investigated by photo-degradation of methylene blue (MB).It's found that the composite containing 3％ molar ratio of WO3 with calcination temperature of 500℃ showed the best photocatalytic activity.The degradation efficiency of MB with this composite could reach 99.1％,much higher than that of P25,which was only 29.5％ under the same conditions.关键词
二氧化钛/三氧化钨/介孔空心球/光催化/亚甲基蓝Key words
titania dioxide/tungsten trioxide/mesoporous hollow sphere/photocatalytic/methylene blue分类
化学化工引用本文复制引用
喻洋,佟明兴,何玉兰,陈辉,高静,李国华..介孔TiO2/WO3空心球的制备及其可见光光催化性能[J].无机材料学报,2017,32(4):365-371,7.基金项目
国家自然科学基金(21173193,21301154) （21173193,21301154）
浙江省自然科学基金(Y4080209,Y406094) （Y4080209,Y406094）
宁波市自然科学基金(2014A610116)National Natural Science Foundation of China (21173193,21301154) （2014A610116）
Natural Science Foundation of Zhejiang Provience(Y4080209,Y406094) （Y4080209,Y406094）
Natural Science Foundation of Ningbo (2014A610116) （2014A610116）
