A new Keggin-type polyoxometallate-based bifunctional catalyst for trace detection and pH-universal photodegradation of phenol  

作　　者：Shuang Li Jiayu Sun Guocheng Liu Shuo Zhang Zhong Zhang Xiuli Wang 

机构地区：[1]College of Chemistry and Materials Engineering,Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell,Bohai University,Jinzhou 121013,China

出　　处：《Chinese Chemical Letters》2024年第8期335-340,共6页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC,Nos.21901018,21971024,22271021);the Natural Science Foundation and Education Department of Liaoning province(Nos.2022-MS-373,2021-MS-312,LJ2020008).

摘　　要：The widespread application of phenolic substances in the field of food,medicine and industry,is harmful to the environment and human health.Therefore,it is very important to develop a con-venient and effective method to detect and degrade phenolic compounds.Herein,we report a new keggin-type polyoxometallate-based metal-organic complex self-assembled under solvothermal condition,{[Cu(dap)(3-PA)]4(SiW_(12)O_(40))(H_(2)O)_(2)}·2H_(2)O(1,dap=1,2-diaminopropane,3-HPA=3-pyridineacrylic acid).1 shows an interesting 1D ladder-like structure.As a bifunctional catalyst,1 can be employed as a colori-metric sensor toward phenol with the relatively low detection limit(LOD)of 0.36μmol/L(S/N=3)in the wide range(0.001-0.1 mmol/L).The title colorimetric sensor is applied to determine phenol in various water environment with good recoveries ranging from 95%-105%.In addition,1 also exhibits excellent photocatalytic degradation toward phenol under visible light with the highest removal efficiency at 96%for 100 min and wide pH universality.The selectivity,stability and reliability of the detection of 1 towards phenol,as well as the detection for 4-chlorophenol,o-cresol,4-nitrophenol and phloroglucinol were stud-ied.Furthermore,the photocatalytic reaction kinetics and the mechanisms of photodegradation of phenol were also investigated in detail.

关 键 词：POM-based metal-organic complex Bifunctional catalyst Phenolic colorimetric sensor Low detection limit pH-universal photocatalysis Photodegraded phenol 

分 类 号：O657.3[理学—分析化学] O643.36[理学—化学] X703[环境科学与工程—环境工程] X832