硅酸镁吸附剂的制备及性能表征

Preparation and Characterization of Magnesium Silicate

以MgCl2、NH3·H2O、NH4Cl和硅胶球为原料,采用牺牲模板-水热法制备硅酸镁吸附剂。考察了合成温度、原料形貌及组成等因素对合成材料性能结构的影响,借助扫描电子显微镜(SEM)、X射线粉末衍射(XRD)、比表面分析仪等分析方法对合成产品进行了表征,优化了合成条件,最终合成了最大比表面积为642.72m2/g的硅酸镁材料。

Magnesium silicate was successfully prepared by a hydrothermal-sacrifice template process in a mixed solvent system.The mixed solvents were made of the silicon dioxide template,magnesium chloride as magnesium source,ammonia and ammonium chloride.The influences of synthesis conditions such as the reaction time and temperature,the morphology of silicon dioxide and the concentration of MgCl2 were studied.The products were characterized by scanning electron microscopy （SEM）,X-ray diffraction （XRD） and specific surface area analyzer.At optimized conditions,the synthesized magnesium silicate has the BET surface area up to 642.72 m2/g.