CuMgAl-LDH超分子材料的组装及其晶胞结构  

Assembly and cell structure of CuMgAl-LDH supermolecules materials

作　　者：吴健松 许立淼 李康艳 陈乔华 严大镔 陈创浩 黄保莹 董江珊 WU Jiansong;XU Limiao;LI Kangyan;CHEN Qiaohua;YAN Dabin;CHEN Chuanghao;HUANG Baoying;DONG Jiangshan(College of Science,Guangdong Maoming Preschool Normal College,Maoming 525000,China;College of Chemistry and Chemical Engineering,Lingnan Normal University,Zhanjiang 524048,China)

机构地区：[1]广东茂名幼儿师范专科学校理学院,广东茂名525000 [2]岭南师范学院化学化工学院,广东湛江524048

出　　处：《湖北大学学报（自然科学版）》2023年第5期743-748,共6页Journal of Hubei University：Natural Science

基　　金：国家自然科学基金(40976074);2021年广东省科技创新战略专项资金(2021S0060);广东省教育厅2021年普通高校特色创新项目(2021KTSCX329);广东茂名幼儿师范专科学校2022年度“十四五”规划资助课题(2022GMYSKT25)资助

摘　　要：以三水合硝酸铜和九水合硝酸铝为原材料,碳酸钠和碳酸氢钠组成的缓冲对为介质,碳酸钠为沉淀剂,采用水热法组装了CuMgAl-LDH超分子材料.研究表明,水热反应温度为155℃,反应时间为105 h时得到的CuMgAl-LDH晶体结构是最优的.CuMgAl-LDH样品的测试采用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、N 2气比表面等温吸附、元素分析和热失重分析进行分析.计算了CuMgAl-LDH晶胞参数,结果如下:a=0.302 nm,c=2.411 nm,h=0.323 nm.并推导出CuMgAl-LDH超分子化学式为Cu 0.8 Mg 1.2 Al(OH)5CO 3·3H 2O.我们探究了各种化学制备条件,得出最优制备条件的各种参数,并研究了缓冲对在CuMgAl-LDH晶体生长中的作用.CuMgAl LDH supramolecular materials were assembled by hydrothermal method with copper nitrate trihydrate and aluminum nitrate trihydrate as raw materials,buffer pairs composed of sodium carbonate and sodium bicarbonate as medium,and sodium carbonate as precipitator.The results show that the crystal structure of CuMgAl LDH is optimal when the hydrothermal reaction temperature is 155℃and the reaction time is 105 h.The CuMgAl LDH samples were analyzed by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),N 2 specific surface isotherm adsorption,elemental analysis and thermogravimetric analysis.The cell parameters of CuMgAl LDH were calculated.The results were as follows:a=0.302 nm,c=2.411 nm,h=0.323 nm.The chemical formula of CuMgAl-LDH supramolecular was deduced as Cu 0.8 Mg 1.2 Al(OH)5CO_(3)·3H_(2)O.Various chemical preparation conditions were also studied,and various parameters of the optimal preparation conditions were obtained,and the role of buffer pair playing in the growth of CuMgAl LDH crystal was investigated.

关 键 词：多孔结构催化材料 制氢催化剂 CuMgAl-LDH 晶胞结构 

分 类 号：O614[理学—无机化学]