摘要
采用溶胶-凝胶法,将TiO_2负载到介孔分子筛SBA-15上,再通过FeCl3浸渍的方法,将不同量的铁掺杂到TiO_2-SBA-15上.通过FT-IR、XRD、N2吸附-脱附和TEM等手段对铁掺杂TiO_2-SBA-15催化剂进行表征.结果表明:负载TiO_2后的SBA-15依然为高度有序的二维六方结构,比表面积略有减小,说明SBA-15的孔道结构有利于TiO_2的分散.掺铁后的TiO_2-SBA-15的结构改变不大,且TiO_2晶形仍为锐钛矿型.最后以光催化降解甲基橙探究不同铁掺杂量的TiO_2-SBA-15催化活性.结果表明:铁离子掺杂量为0.035%(质量分数),紫外光照射200min时,甲基橙降解率达最高值98.2%.
By sol-gel method TiO2 is loaded on mesoporous molecular sieve SBA-15 .The catalysts which have different contents of iron,are obtained by impregnating FeCl3 onto TiO2-SBA-15 .The catalysts are characterized by FT-IR,XRD,N2 adsorption-desorption and TEM.The characterization results indicate that the TiO2 loaded SBA-15 still has highly ordered 2-dimensional hexagonal structure and the BET surface area is slightly decreased,which demonstrate that the channel of SBA-15 is beneficial to the scatter of the TiO2 .The structure of TiO2-SBA-15 has not changed too much after doping with iron.The crystalline form of TiO2 is still anatase.The catalytic activity of iron doped TiO2-SBA-15 is investigated by photocatalytic degradation of methyl orange.The photo-catalysis results reveal that when the doped content of iron is 0.035% （the mass fraction）and UV radiation time is 200 min,the degradation rate can reach maximum of 98.2%.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2016年第4期335-340,共6页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(21561024)
内蒙古自然科学基金资助项目(2015MS0222)
关键词
铁掺杂
TIO2
分子筛
光催化
Fe doping
TiO2
molecular sieve
photo-catalysis
