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采用水热法,以十二胺为模板剂,苯基桥链硅氧烷为有机硅源的共缩聚法合成桥链双亚胺席夫碱功能介孔二氧化硅(PMOs),并利用FT-IR,XRD,N_2吸附/脱附及TEM对合成的样品进行表征,考察了桥联有机硅源量对PMOs材料结晶和介孔结构特性的影响。结果显示,通过苯基桥链硅氧烷为有机硅源可实现介孔二氧化硅的席夫碱功能化,样品的孔径为2.65~2.96nm的介孔结构范围。但随着桥联有机硅源量的增加,受有机结构的影响,PMOs材料的晶型有序度和介孔规整度下降。吸附性能显示,PMOs材料对Cu~(2+)具有较好的吸附性能,对铜离子(Cu~(2+))的最高吸附率达到90.35%。
Hydrothermal method was used to synthesize bridged bisimine Schiff base functional mesoporous silica (PMOs) by copolycondensation of dodecylamine as templating agent and phenyl bridged siloxane as organic silicon source. FT - IR, XRD, N 2 adsorption / desorption and TEM were used to characterize the synthesized samples. The effect of the amount of bridged organic silicon on the crystallization and mesoporous structure of PMOs was investigated. The results show that the Schiff base functionalization of mesoporous silica can be achieved by using phenyl bridged siloxane as the organic silicon source. The pore size of the sample is in the range of 2.65 ~ 2.96 nm. However, with the increase of the amount of bridged organic silicon, the crystal ordering and mesostructure regularity of PMOs decrease due to the organic structure. The adsorption properties of PMOs show that CuOs have good adsorption properties on Cu 2+, and the maximum adsorption rate of Cu 2+ is 90.35%.