摘要
分别采用一步法和两步法,在不同酸性介质中设计合成了Im3m结构的SBA-16硅基介孔材料,并通过XRD、TEM、氮气吸附-脱附、29Si固体核磁等手段进行了表征,研究SBA-16硅基介孔材料合成条件和结构对溶液中Cd2+吸附性能的影响.结果表明:在相同条件下,SBA-16硅基介孔材料的孔径越大、比表面积越高、孔壁表面Si-OH的数量越多,对Cd2+的吸附性能越佳.
Well-ordered SBA-16 mesoporous silica materials with Im3m structure were synthesized via the one-step or two-step pathway under strongly or mildly acidic conditions. The properties of the prepared materials were confirmed by powder X-ray diffraction patterns （XRD） ,transmission electronic microscopy（TEM）,N2 adsorption-desorption isotherms and solid-state 29Si nuclear magnetic resonance （^29Si-NMR）. The adsorption properties of the prepared SBA- 16 materials were investigated by Cd^2＋ removal from aqueous solutions. The results suggest that adsorption capacity of the prepared SBA-16 materials increases with the increasing of pore size,specific surface area and the amount of remained Si--OH into silica wall whilst keeping all other conditions constant.
出处
《天津科技大学学报》
CAS
2009年第3期13-16,共4页
Journal of Tianjin University of Science & Technology
基金
国家科技支撑计划课题(2006BAD30B02-3)
天津科技大学引进人才科研启动基金资助项目(20070444)
关键词
立方硅基介孔材料
吸附
SBA-16
镉离子
mesoporous silica materials with cubic structure
adsorption
SBA-16
cadmium ion
