高炉渣纤维负载TiO2光催化材料的制备及其光催化性能  

Preparation and Performance Characterization of Photocatalytic Materials of TiO_2 Loaded on Blast Furnace Slag Fibre

作　　者：邢宏伟 谷少鹏 刘志刚 杨立荣 

机构地区：[1]华北理工大学冶金与能源学院,河北省现代冶金技术重点实验室,河北省无机非金属材料重点实验室,唐山063009

出　　处：《硅酸盐通报》2016年第8期2329-2334,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家科技支撑计划项目(2012BAE09B02);国家科技支撑计划项目(2012BAE09B03);河北省自然科学基金项目(E2015209317)

摘　　要：以高炉渣纤维(BFSF)为载体,采用溶胶凝胶法,在BFSF表面负载TiO_2,制备BFSF负载TiO_2(TiO_2/BFSF)光催化材料。利用差热-热重(TG-DTA)、X射线衍射仪(XRD)、场发射扫描电镜(SEM)及能谱元素分析(EDS)等近代测试方法对TiO_2/BFSF的显微结构和相组成进行了表征。以模拟印染废水的亚甲基蓝(MB)的降解,评价样品的光催化活性。实验结果表明:TiO_2溶胶负载3次,煅烧温度为450℃时,TiO_2/BFSF光催化材料表面负载了一层均匀密实的锐钛矿型TiO_2,当紫外光照射180 min时,亚甲基蓝的降解率达到92.5%。循环利用TiO_2/BFSF光催化材料4次,亚甲基蓝的降解率依然能够达到63%。Photocatalytic materials of TiO2 loaded on blast furnace slag fibre（BFSF） （TiO2/BFSF） were prepared by sol-gel process using BFSF as the carrier. The phase structure and microstructure of the photocatalytic materials were characterized by using thermo-gravimetric/differential thermal analyzer（ TG- DTA）, X-ray diffractometry （XRD）, scanning electron microscopy （SEM） and energy-dispersive spectrometer（EDS）. The effect of impregnating number, calcining temperature and reused times on photocatalysis performance of TiO2/BFSF were investigated by the degradation of methylene blue （ MB ） simulated dyeing waste water. The results show that the best photocatalysis performance is achieved under the condition of 3 times impregnating of TiO2 sol and calcination at 450℃. The degradation rate of MB can be about 92.5% under the ultraviolet light irradiation for 180 min. The degradation rate of MB can still be 63% after TiO2/BFSF was reused for 4 times.

关 键 词：高炉渣纤维 TIO2 光催化 溶胶-凝胶法 

分 类 号：TD989[矿业工程—选矿]