合成皂石为前驱物制备高稳定性含镍介孔分子筛

PREPARATION OF Ni-MESOPOROUS MOLECULAR SIEVES OF HIGH STABILITY BY USING SAPONITE AS A PRECURSOR

以无机盐为原料通过控制pH值,用水热法合成含Ni皂石,并以此皂石为前驱物、十六烷基三甲基溴化铵为模板剂,制备含Ni介孔分子筛。用X射线粉末衍射、Fourier变换红外光谱、程序升温还原、透射电子显微镜、比表面积和孔径测定等仪器和方法表征样品的物化性能。结果表明:制得了有序性好的含Ni介孔分子筛,其比表面积为811.2m2/g,平均孔径为3.64nm。所制备的含Ni介孔分子筛经850℃焙烧3h或100℃水热处理10d后仍然具有介孔结构,说明样品具有高的(水)热稳定性。

Saponites with Ni were synthesized by a hydrothermal method with inorganic salts as the raw material and with a controlled pH value. Then mesoporous molecular sieves with Ni were synthesized by the hydrothermal method with the above synthesized saponites as precursors and cetyl trimethyl ammonium bromide as template agent. The samples were characterized by X-ray diffraction, Fourier transform infrared spectra, temperature programmed reduction, transmission electron microscope, nitrogen adsorption surface area and porosity measurements. The results show that a highly ordered mesoporous molecular sieve with Ni is obtained with specific surface area of 811.2m^2/g and the average pore diameter of 3.64 nm. The prepared mesoporous molecular sieves with Ni still has a mesoporous structure after calcination at 850℃ for 3h or hydrothermal treatment at 100℃ for 10d. It is concluded that the obtained samples have high thermal and hydrothermal stability.