高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (6): 1723.doi: 10.7503/cjcu20200845

• 无机化学 • 上一篇    下一篇

基于Keggin型杂多酸的无机-有机杂化物的合成和光催化活性

赵雪1, 张安歌2, 田洪瑞1, 王赫男1, 霍海燕1, 刘术侠1()   

  1. 1.东北师范大学化学学院, 长春 130024
    2.吉林师范大学环境科学与工程学院, 四平 136099
  • 收稿日期:2020-12-07 出版日期:2021-06-10 发布日期:2021-06-08
  • 通讯作者: 刘术侠 E-mail:liusx@nenu.edu.cn
  • 基金资助:
    国家自然科学基金(21872021)

Synthesis and Photocatalytic Degradation Activity of Two Inorganic-organic Hybrids Based on Keggin-type Heteropolyacids

ZHAO Xue1, ZHANG Ange2, TIAN Hongrui1, WANG Henan1, HUO Haiyan1, LIU Shuxia1()   

  1. 1.College of Chemistry,Northeast Normal University,Changchun 130024,China
    2.College of Environmental Science and Engineering,Jilin Normal University,Siping 136609,China
  • Received:2020-12-07 Online:2021-06-10 Published:2021-06-08
  • Contact: LIU Shuxia E-mail:liusx@nenu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21872021)

摘要:

采用水热合成方法制备了2个基于Keggin型杂多酸的无机-有机杂化物, 化学式分别为{[Cu2(4,4′- bipy)4(H2O)4](SiMo12O40)·18H2O}n(1)和{[Cu2(4,4′-bipy)4(H2O)4](PMo6W6O40)·18H2O}n(2)(bipy=bipyridine). 结构分析 表明2个化合物同构, Cu2+是六配位, 分别与4个4,4′-bipy上的N原子和2个水分子上的O原子结合, 形成 [Cu(4,4′-bipy)2(H2O)2]n2n+二维层状结构. 杂多阴离子通过静电与配位阳离子[Cu(4,4′-bipy)2(H2O)2]n2n+作用交叉排列在层间. 通过红外光谱、 粉末X射线衍射和固体紫外-可见漫反射光谱等对化合物的性质进行了表征. 研究了所合成化合物对水溶性染料亚甲基蓝的降解活性, 发现2种化合物对于亚甲基蓝均表现出显著的光降解活性, 并对它们的催化机理进行了讨论.

关键词: 多金属氧酸盐, Keggin型杂多酸, 无机-有机杂化物, 光催化

Abstract:

Two inorganic-organic hybrids based on Keggin-type heteropolyacids with the chemical formula {[Cu2(4,4′-bipy)4(H2O)4](SiMo12O40)·18H2O}n1) and {[Cu2(4,4′-bipy)4(H2O)4](PMo6W6O40)·18H2O }n2)(bipy=bipyridine) were prepared. The single crystal X-ray analysis shows that the two compounds are isostructural, in which the Cu2+ is six-coordinated, ligated by four N atoms from four 4,4′-bipy and two O atoms from the two water molecules, forming a 2D cation layer [Cu(4,4′-bipy)2(H2O)2n2n+. Keggin-type heteropolyanions are arranged between the 2D cation layers by electrostatic interaction with coordination cations [Cu(4,4′-bipy)2(H2O)2n2n+. These compounds are characterized by infrared spectroscopy, powder X-ray diffraction and solid ultraviolet-visible diffuse reflectance spectroscopy. The degradation activity of synthetic compounds on the water-soluble dye methylene blue was researched. The experimental results indicate that the two compounds exhibit significant photodegradation activity for methylene blue, and the catalytic mechanism is discussed.

Key words: Polyoxometalate, Keggin-type heteropolyacid, Inorganic-organic hybrid, Photocatalysis

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