滤纸为模板制备纳米沸石分子筛

Preparation of nano-zeolite by fibrous cellulose as template

采用滤纸作为空间限制模板,用无溶剂、低成本的合成路线成功制备了纳米八面沸石,通过X射线衍射(XRD)、扫描电镜(SEM)、X射线荧光光谱分析(XRF)、氮气吸脱附(BET)和热重(TG)对合成的样品进行了表征,得到了孔径均一且结构稳定的X型和Y型八面沸石分子筛,合成的X型和Y型沸石分子筛平均粒径分别为24、34 nm,对应的比表面积是490、760 m2·g^-1。用50 mL 50 mg·L^-1铜离子溶液作为吸附模型来研究合成纳米沸石的吸附效率,发现40 mg的X型八面沸石在70 min内对铜离子的吸附达到饱和,吸附效率是98.44%。

The nano faujasite zeolite was successfully prepared by fibrous cellulose as the template of confinespace in a solvent-free and low-cost synthesis route.The sample was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),X-ray fluorescence spectrometry(XRF),nitrogen adsorption/desorption(BET)and thermogravimetric analysis(TGA).The X and Y-type faujasite zeolite with uniform morphology and stable structure has been obtained;the average particle size of the synthesis of zeolite molecular sieves is 24 nm and 34 nm,respectively.The corresponding specific surface area is 490 and 760 m^2-g^-1.Using 50 mL 50 mg^-L^-1 copper ion solution as the adsorption model to investigate the adsorption efficiency of the prepared nano-zeolite,we have found that 40 mg X zeolite can reach the adsorption saturation of copper ion within 70 min,and that the adsorption efficiency is 98.44%.