基于Keggin型杂多酸的无机-有机杂化物的合成和光催化活性  

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

作　　者：赵雪 张安歌 田洪瑞 王赫男 霍海燕 刘术侠[1] ZHAO Xue;ZHANG Ange;TIAN Hongrui;WANG Henan;HUO Haiyan;LIU Shuxia(College of Chemistry,Northeast Normal University,Changchun 130024,China;College of Environmental Science and Engineering,Jilin Normal University,Siping 136609,China)

机构地区：[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

出　　处：《高等学校化学学报》2021年第6期1723-1729,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21872021,21671033)资助。

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](Si Mo12O40)·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.Two inorganic-organic hybrids based on Keggin-type heteropolyacids with the chemical formula{[Cu2(4,4′-bipy)4(H2O)4](SiMo12O40)·18H2O}n(1)and{[Cu2(4,4′-bipy)4(H2O)4](PMo6W6O40)·18H2O}n(2)(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)2]n2n+.Keggin-type heteropolyanions are arranged between the 2D cation layers by electrostatic interaction with coordination cations[Cu(4,4′-bipy)2(H2O)2]n2n+.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.

关 键 词：多金属氧酸盐 KEGGIN型杂多酸 无机-有机杂化物 光催化 

分 类 号：O611.4[理学—无机化学]