La^(3+)取代的纳米尺寸砷钨氧簇的合成、晶体结构及光催化性质研究  

Synthesis,Crystal Structure and Photocatalytic Properties of Nanosized La^(3+)-Substituted Arsenotungstate Cluster

作　　者：杨玲 苏斌斌 王宏胜 李金钊[1,2,3] 李叶盛 陈睿 YANG Ling;SU Binbin;WANG Hongsheng;LI Jinzhao;LI Yesheng;CHEN Rui(Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province,Henan 461000,China;Institute of Surface Micro and Nano Materials,Xuchang University,Henan 461000,China;College of Chemical and Materials Engineering,Xuchang University,Henan 461000,China)

机构地区：[1]河南省微纳米能量储存与转换材料重点实验室,许昌461000 [2]许昌学院表面微纳米材料研究所,许昌461000 [3]许昌学院化工与材料学院,许昌461000

出　　处：《人工晶体学报》2024年第9期1591-1598,共8页Journal of Synthetic Crystals

摘　　要：本文基于自组装原理,以Na_(2)WO_(4)·2H_(2)O、亚砷酸钠和LaCl_(3)·6H_(2)O为主要原料,采用一锅法将稀土金属La~Ⅲ与缺位结构的多钨氧簇构筑单元结合得到了一例新型稀土基砷钨氧簇合物,并借助单晶X射线衍射、X射线粉末衍射(PXRD)、傅里叶红外光谱(IR)等手段确认了其结构和组成。单晶X射线衍射结果表明:该配合物属于单斜晶系,C2/c空间群,晶胞参数为a=3.59556(14)nm,b=1.22248(4)nm,c=2.24734(9)nm,β=117.1170(10)°,V=8.7923(6)nm^(3),Z=4,其分子式为[(CH_(3))_(2)NH_(2)]_(8)H_(3.56)[{LaO(H_(2)O)_(2)}{WO(H_(2)O)}{W_(0.24)(H_(2)O)_(2)}{AsW_9O_(33)}_(2)]。在该化合物中,聚阴离子簇[{LaO(H_(2)O)_(2)}{WO(H_(2)O)}{W_(0.24)(H_(2)O)_(2)}{AsW_9O_(33)}_(2)]~(11.56-)具有三明治结构,可以看作是由两个{AsW_(9)O_(33)}单元夹心1个{LaO(H_(2)O)_(2)}片段、1个{WO(H_(2)O)}组分和1个{W_(0.24)(H_(2)O)_(2)}片段组成。本文进一步探究了该化合物对于罗丹明-B的催化降解性质,结果表明,在300 W的汞灯照射条件下,该化合物表现出了良好的光催化活性,降解效率为74%。Based on the principle of molecular design and self-assembly,a novel rare earth based arsenotungstate was obtained by introducing rare earth LaⅢions into the lacunary polyoxotungstates clusters with vacancy structure by one-pot method with Na_(2)WO_(4)·2H_(2)O,NaAsO_(2)and LaCl_(3)·6H_(2)O as the main materials.The structure and composition of this complex was confirmed by single-crystal X-ray diffraction,X-ray powder diffraction(PXRD),infrared spectroscopy(IR)and so on.The single crystal X-ray diffraction results show that the complex is in the monoclinic system,C2/c space group,and with the cell parameters of a=3.59556(14)nm,b=1.22248(4)nm,c=2.24734(9)nm,β=117.1170(10)°,V=8.7923(6)nm^(3),Z=4.The molecular formula of this compound is[(CH_(3)_(2)NH_(2)]_(8)H_(3.56)[{LaO(H_(2)O)_(2)}{WO(H_(2)O)}{W_(0.24)(H_(2)O)_(2)}{AsW_(9)O_(33)}_(2)].And the polyoxoanion[{LaO(H_(2)O)_(2)}{WO(H_(2)O)}{W_(0.24)(H_(2)O)_(2)}{AsW_(9)O_(33)}_(2)]^(11.56-)shows a novel sandwich type structure,which can be simply described as two trilacunary Keggin type{AsW_(9)O_(33)}units are linked by a{LaO(H_(2)O)_(2)}segment,a{WO(H_(2)O)}segment and a{W_(0.24)(H_(2)O)_(2)}segment.Catalytic degradation property of this compound for Rhodamine-B was further inverstigated.The results demonstrate that the compound shows good photocatalytic activity under the condition of 300 W Hg lamp irradiation,and the degradation efficiency reaches to 74%.

关 键 词：多金属氧酸盐 砷钨氧酸盐 一锅法 镧配合物 晶体结构 有机染料 光催化降解 

分 类 号：O641.4[理学—物理化学] O643.36[理学—化学] O644.1