摘要
室温下,在以锌片作为工作电极和含2-甲基咪唑水溶液为电解液的三电极电化学体系中,通过氧化金属锌电极生成锌离子与2-甲基咪唑配位,制备具有较高结晶度的以锌为中心离子的ZIF-8。借助X射线衍射、扫描电镜、红外光谱、热重和吸附测试对制备的ZIF-8粉末的晶型、微观形貌、稳定性和比表面积等进行了分析。结果表明,金属锌电极的氧化电压对ZIF-8粉末的结构和形貌影响显著,改变外加电压值,能改变反应体系中的锌离子浓度。形成的ZIF-8的颗粒尺寸随着外加氧化电压的不断增加,逐渐变小。
The generation process of zinc ion was controlled by the electrochemical method at room temperature to prepare higher crystallinity ZIF-8 with zinc ion as the central ion.A three-electrode electrochemical system was used with a zinc sheet as the working electrode and 2-methyl imidazole aqueous solution as the electrolyte.The zinc ions generated by the oxidation of the metal zinc electrode react with 2-methyl imidazole to form ZIF-8.The morphologies,microstructure,stability and specific surface area of ZIF-8 were characterized by X-ray diffraction,scanning electron microscope,Fourier transform infrared spectroscopy,thermogravimetric and adsorption analyses.The results show that the oxidation voltage of the metal zinc electrode significantly affects the structure and morphology of the ZIF-8 powder.Changing the applied voltage value can change the concentration of zinc ions in the reaction system,and as the applied oxidation voltage was increased,the particle size of the formed ZIF-8 gradually becomes smaller.
作者
袁晓萱
张敬波
韩海娟
张志新
YUAN Xiao-xuan;ZHANG Jing-bo;HAN Hai-juan;ZHANG Zhi-xin(College of Chemistry,Tianjin Normal University,Tianjin 300387,China;Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry,Tianjin Normal University,Tianjin 300387,China;Tianjin Key Laboratory of Structure and Performance for Functional Molecules,Tianjin Normal University,Tianjin 300387,China)
出处
《唐山师范学院学报》
2018年第6期7-11,共5页
Journal of Tangshan Normal University
基金
国家自然科学基金资助项目(21273160)
关键词
锌电极氧化
氧化电压
ZIF-8合成
oxidation of zinc electrode
oxidation voltage
synthesis of ZIF-8
