Schiff碱改性法制备SBA-15型介孔分子筛负载的纳米氧化镍

基于Schiff碱功能单体的改性作用，采用共缩聚方法，制备了SBA-15型介孔分子筛负载的氧化镍纳米粒子。 采用小角X射线散射（small angle XRD）、广角X射线衍射（wide angle XRD）、紫外-可见光谱（UV-Vis）、高分辨透射电子显微镜（HRTEM）和N2吸附-脱附测定对制得的样品进行了表征。 结果表明，制得的样品具有SBA-15型介孔分子筛典型的二维六方有序结构，NiO纳米粒子主要分布于SBA-15型介孔分子筛的孔道内。 当功能单体的含量不超过10%时，SBA-15型介孔分子筛的孔径在6~8 nm范围内；而当功能单体的含量达到15%时，SBA-15型介孔分子筛的孔道被严重堵塞，孔径降为3.8 nm。 NiO纳米粒子的尺寸随着功能单体含量的增加而增大。

Preparation of NiO Nanoparticles Supported on SBA-15 Mesoporous Molecular Sieve Modified by Schiff Base Monomer

With copolymeric modification by Schiff base monomer, NiO nanoparticles supported on SBA-15 mesoporous molecular sieves were prepared and characterized by powder X-ray diffraction(XRD), UV-Vis spectrometer, high resolution transmission electron microscopy(HRTEM) and N2 adsorption-desorption isotherms. The results show that the as-prepared samples possess a bi-dimensional P6mm hexagonal symmetry of the pores and the formed NiO nanoparticles are mainly dispersed into channels of SBA-15. When the loadings of Schiff base monomer are less than 10%, the pore diameter is in the range of 6~8 nm. Increasing the loading of Schiff base monomer up to 15%, the channels of SBA-15 are severely blocked by encapsulated NiO nanoparticles and the pore diameter is reduced to 3.8 nm. In addition, NiO nanoparticle size increases with increasing Schiff base monomer loading.