无机盐模板剂法合成介孔CeO_2

以自制碳酸镁为模板,通过高速搅拌,加入硝酸铈溶液,以及以氨水为沉淀剂,获得介孔CeO_2前驱体,再通过低温焙烧后用弱酸去除模板剂碳酸镁,即得到介孔CeO_2.并采用XRD,BET,HRTEM,FT-IR等手段对其进行了表征.结果表明,利用无机盐碳酸镁为模板剂合成的介孔CeO_2,比表面为129m~2/g,平均孔径为5nm.

Synthesis and Characteristics of Mesoporous Ceric Oxide Using An Inorganic Template Approach

Taking self-made MgCO_3 (magnesium carbonate) as the template,through high-speed stirring, gradually adding cerium nitrate solution,after fully stirring, slowly dropping NH_3·H_2O(ammonia) solution as precipitator,then the precursor can be obtained.Further after low-temperature calcination ,removing template of magnesium carbonate with weak acid,then the objective product of mesoporous CeO_2 was obtained.The material was characterized by small and large X-ray diffraction, nitrogen physisorption, high-resolution transmission electron microscopy (HRTEM) and FT-IR spectra. The results show that it is possible to synthesis mesoporous CeO_2 with inorganic magnesium carbonate as template.The surface of the obtained product is 129m~2/g and the average pore size of it is 5nm.