氨基酸辅助制备CaWO₄空心球及吸附Pb²⁺性能  

Amino Acid-Assisted Synthesis CaWO4 Hollow Microspheres and Adsorption Property for Pb2+

作　　者：刘科麟[1] 丁津津[1] 王淼[1] 

机构地区：[1]南通大学化学与化工学院,江苏 南通

出　　处：《有机化学研究》2024年第2期299-305,共7页Journal of Organic Chemistry Research

摘　　要：本论文以甘氨酸(Gly)为配体和结构导向剂,采用水热法制备了纳米微粒组装的直径约为4 μm的CaWO4空心球。SEM结果表明,氨基酸及反应时间对产物的形貌有重要影响。N2吸附–脱附结果表明,CaWO4空心球的BET表面积高达114.94 m2/g。原子吸收光谱结果表明CaWO4空心球对Pb2+有良好的吸附性质,与Langmuir吸附等温线拟合结果一致,最大吸附量为41.68 mg/g。CaWO4独特的中空结构和较大的比表面积赋予了CaWO4空心球在重金属吸附领域有广阔的应用前景。By using glycine as a ligand and structure-directing agent, nanoparticles-assembled CaWO4 hollow microspheres with a diameter of 4 μm were prepared via a hydrothermal method. SEM results showed that the morphologies of the products were sensitive to the glycine and reaction time. N2 adsorption-desorption results indicated that the BET-specific surface area of the CaWO4 hollow microspheres was as high as 114.94 m2/g. The atomic absorption spectra results showed that the CaWO4 hollow microspheres exhibited excellent adsorption properties for Pb2+ adsorption, which was agreed with the Langmuir adsorption isotherm, and the maximum adsorption capacity was 41.68 mg/g. The unique hollow structures together with large specific surface areas might endow CaWO4 hollow microspheres with wide application prospects in heavy metal ions removal.

关 键 词：CaWO₄ 空心球 Pb²⁺吸附 吸附剂 

分 类 号：TB3[一般工业技术—材料科学与工程]