离子液体型多金属氧酸盐[PyPS]nH(3-n)PW(12)O(40)·xH2O的合成及其对水溶液中染料的光催化脱色作用  

Preparation of Ionic Liquid-like Polyoxometalates [PyPS]_nH_(3-n)PW_(12)O_(40)·xH_2O and Their Photocatalytic Performances to Decoloration of Dyes in Aqueous Solution

作　　者：李园园[1] 杨春[1] 

机构地区：[1]江苏省生物功能材料重点实验室,南京师范大学化学与材料科学学院,南京210097

出　　处：《应用化学》2013年第3期310-315,共6页Chinese Journal of Applied Chemistry

基　　金：江苏高校优势学科建设工程资助项目;南京师范大学“211工程”三期重点学科建设计划资助项目

摘　　要：以吡啶、丙磺酸内酯和钨磷酸为原料,合成了离子液体型多金属氧酸盐(POM-IL)化合物[PyPS]nH3-nPW12O40·xH2O(n=1,2,3),用FT-IR、UV-Vis、1H NMR和元素分析等对其进行了表征。结果显示,POM-IL化合物仍保持相应钨磷酸的Keggin结构,并存在吡啶丙磺酸的特征谱带,熔点均高于130℃,且随有机阳离子含量增加,熔点降低。在紫外光下,n为1和2的POM-IL对水溶液中甲基橙的光催化降解活性与钨磷酸相似;在可见光下,POM-IL对水溶液中靛红的光催化降解活性相近,且均远高于钨磷酸。Ionic liquid-like polyoxometalates （POM-IL） , [ PyPS ]. H3 -n. PW12 040· xH2O （ n = 1,2,3 ）, were synthesized by using pyridine, 1,3-propanesultone and tungstophosphoric acid as raw materials. The compounds were characterized by means of FT-IR, UV-Vis, 1H NMR and elementary analyses. The results showed that Keggin structure of POM was kept and there were character bands of pyridyl propylsulfonic acid in the POM-IL salts. All prepared compounds possess melting-points above 130 ℃ and the melting-points decreased with the increase of the organic component. Furthermore, the photocatalytic performances of these POM-IL samples for the degradation of aqueous dyes were investigated. Under UV irradiation, the samples with n = 1 and 2 showed similar photocatalytic activities to that of tungstophosphoric acid for the degradation of methyl orange. Under visible light, all POM-IL salts exhibit superior to tungstophosphoric acid for the degradation of isatin. promising photocatalysts for the degradation of some dyes under the same photocatlytic activities which are Therefore, all these POM-IL salts might be visible light.

关 键 词：离子液体 多金属氧酸盐 合成与表征 光催化 

分 类 号：O643.3[理学—物理化学]