介孔TiO_2/SiO_2复合材料对铅离子的吸附性能  

The adsorption of lead ions on mesoporous TiO_2/SiO_2 composite

作　　者：闫磊磊[1] 常薇[1] 沈彦平[1] 王磊[1] 孙红红[1] 李甜甜[1] 

机构地区：[1]西安工程大学环境与化学工程学院,陕西西安710048

出　　处：《西安工程大学学报》2016年第5期578-582,共5页Journal of Xi’an Polytechnic University

基　　金：西安工程大学国家级大学生创新资助项目(201510709361);西安碑林科技研究计划资助项目(JX1419)

摘　　要：为改善重金属离子对环境造成的严重污染,通过溶胶凝胶法制备了球形介孔TiO_2/SiO_2复合材料,利用扫描电镜(SEM,scanning electron microscope)和比表面积分析法对复合材料进行表征,考察了pH、温度和吸附时间等对介孔TiO_2/SiO_2吸附Pb2+的影响.结果表明,球形介孔TiO_2/SiO_2复合材料对溶液中Pb^(2+)具有良好的吸附性能.在最佳吸附条件pH为6、吸附温度35℃、复合材料的加入量为25mg、吸附时间25min时,吸附量达到8mg/g.In order to improve serious pollution caused by heary meatal ions,spherical mesoporous TiO_2/SiO_2 composites were prepared by sol-gel method.SEM and BET surface area analysis was used to characterize the composites,and the effect of pH,temperature,contact time etc.was investigated.The result shows that the TiO_2/SiO_2 is effective in removing lead ion and the maximum adsorption capacity is 8mg/g when the optimal adsorption condition is pH 6,constant temperature 35℃,addition of the composite 0.025 g and contact time 25 min.

关 键 词：TIO2/SIO2 PB2+ 吸附 

分 类 号：TQ031[化学工程]