摘要
采用有机先驱体浸渍法及无压烧结工艺,制备了Al2O3多孔陶瓷载体。利用溶胶-凝胶法在多孔陶瓷上负载Sm3+掺杂Ti O2光催化材料。研究了煅烧温度、涂层次数等工艺因素对多孔陶瓷负载Ti O2光催化降解甲基橙溶液的影响规律。结果表明,借助于多孔陶瓷高的气孔率,Ti O2负载在Al2O3颗粒表面或进入颗粒间的孔隙内,使材料具有较大的比表面积。掺入Sm3+使材料的光催化活性提高。在煅烧温度为600℃、四次涂层、甲基橙溶液p H值为2时,多孔陶瓷负载Ti O2光催化降解甲基橙溶液效果最佳。
Al_2O_3 porous ceramics carriers were prepared by organic precusor foam impregnation and pressureless sintering method. TiO_2 photocatalyst doped with Sm^3＋ supported by porous ceramics was prepared by sol-gel method. The effects of calcination temperature, coating times on degradation of methylorange solution were investigated. The results show that materials have large specific area through loading on Al_2O_3 particle surface or entering into pores among Al_2O_3 particle by means of high porosity of Al_2O_3 porous ceramics. The photocatalytic activity was improved by doping Sm^3＋. When calcining temperature is 600 ℃, coating times is four and pH value of methylorange solution is 2, the effeet of photocalalytic degradation of methylorange solution is best with TiO_2 loaded porous ceramics as photocatalyst.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2015年第2期503-508,共6页
Journal of Synthetic Crystals
基金
黑龙江省教育厅2014年度科学技术研究面上项目(12541116)
