钕负载二氧化钛-炭杂化气凝胶的制备及其光催化性能(英文)  

Nd-doped TiO_2-C hybrid aerogels and their photocatalytic properties

作　　者：邵霞 潘峰 郑励 张睿 张文雅 SHAO Xia;PAN Feng;ZHENG Li;ZHANG Rui;ZHANG Wen-ya(School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China;School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai 201418,China)

机构地区：[1]上海应用技术大学,材料科学与工程学院,上海201418 [2]上海应用技术大学,化学与环境工程学院,上海201418

出　　处：《新型炭材料》2018年第2期116-124,共9页New Carbon Materials

基　　金：上海地方高校能力建设项目(12160503600);上海市一流学科建设项目(J201212);国家自然科学基金项目(U1332107);上海应用技术大学复合材料重点学科建设项目(10210Q140001).

摘　　要：采用溶胶凝胶法和浸渍法制备了不同钕掺量负载的二氧化钛/炭(TiO_2-C)杂化气凝胶。通过XRD,SEM,FTIR,XPS及氮气吸附脱附等温线表征了样品的微观结构、形貌及表面元素状态。在500 W汞灯照射下,以亚甲基蓝为目标降解物,研究了样品的光催化活性。结果表明,所制样品为不规则颗粒,钕的掺杂抑制了TiO_2颗粒的生长,TiO_2为锐钛矿型且炭呈现不定型态,同时Nd^(3+)进入TiO_2内形成Ti-O-Nd键。在紫外光波段,样品具有较强的吸收性能,表现出紫外光照下对亚甲基蓝良好的光催化性能。当钕的负载量为3%-4%时,样品具有最佳的光催化活性,此时亚甲基蓝在紫外光照160 min后被完全降解。Nd-doped TiO 2-C hybrid aerogels with different Nd doping levels were prepared by a combined sol-gel and impregnation method.The microstructure,morphology and photocatalytic activities of the samples were investigated by XRD,SEM,FTIR,XPS,nitrogen adsorption and the photocatalytic degradation of methylene blue(MB)under UV irradiation.Results showed that the samples are composed of irregular-shaped nanoparticles and the Nd dopant inhibits their growth.The TiO 2 in the samples is anatase,the carbon is amorphous and Nd 3+is in a Ti-O-Nd bond form.The samples had strong absorption in the ultraviolet region and exhibited good degradation activity for MB in aqueous solutions under UV light.The best activity was achieved when the ratio of Nd to Ti is 3-4 wt%,in which case MB was completely degraded under UV irradiation for 160 min.

关 键 词：光催化性 降解 钕负载 亚甲基蓝 溶胶凝胶法 

分 类 号：TB333[一般工业技术—材料科学与工程]