锯末模板法合成TiO_2光催化剂及其光催化性能研究  

Preparation of TiO_2 by Sawdust Template Method and Its Photocatalytic Performance

作　　者：陈喜凤[1] 王转[1] 武婷月 马占营[1] 

机构地区：[1]咸阳师范学院化学与化工学院,陕西咸阳712000

出　　处：《广东化工》2017年第3期30-31,27,共3页Guangdong Chemical Industry

基　　金：陕西省教育厅科学研究基金(2013JK0690);咸阳师范学院专项科研基金项目(14XSYK011);咸阳师范学院(省级;校级)大学生创新创业训练计划资助项目(2105;2015017)

摘　　要：以锯末为生物模板剂,合成了SD-TiO_2光催化剂,采用SEM、XRD、UV-vis DRS及光催化降解亚甲基兰实验对SD-TiO_2样品的形貌、晶相结构、吸光性能及光催化性能进行了表征。结果表明,合成的SD-TiO_2样品呈蜂窝状。当热处理温度为700℃时,得到的样品中除锐钛矿相TiO_2外,含杂质H_2Ti_3O11·H_2O;当热处理温度为时,得到的SD-TiO_2样品中TiO_2呈锐钛矿和金红石混相。以汞灯为光源,当光照180 min时,SD-TiO_2样品对初始浓度为10 mg/L的亚甲基兰降解率可达80%左右,与在相同条件下未使用锯末模板剂时合成的TiO_2样品相比,SD-TiO_2样品的光催化性能更优越。SD-TiO2 photocatalysts were prepared via wood sawdust template method. The surface morphology, phase crystallinity, photo-absorbance and photocatalytic performance of synthesized samples were characterized by SEM, XRD, UV-vis DRS and photocatalytic degradation of MB. The results indicated that photocatalysts had honeycomb-like structure with uniform size. The XRD patterns indicated that, when calcinated at 700 ℃, the obtained SD-TiO2 samples were consisted of anatase and rutile phase. Photocatalytic experimental results indicated that SD-TiO2 samples showed the highest photocatalytic degradation activity for MB degradation and ca. 80 % MB could be degraded within 180 min under Hg lamp irradiation.

关 键 词：TIO2 光催化 锯末 

分 类 号：TQ[化学工程]