Two Novel Polyoxometalate-Encapsulated Two-Fold Interpenetrating <i>Dia</i> Metal-Organic Frameworks for the Detection, Discrimination And Degradation of Phenolic Pollutants

多金属氧酸盐 污染物 化学 降级(电信) 金属 核化学 有机化学 催化作用 计算机科学 电信
作者
Jianjiao Xin,Zhongxin Jin,Xiaojing Yu,Haijun Pang,Huiyuan Ma,Xinming Wang,Lichao Tan,Guixin Yang
出处
期刊:Social Science Research Network [RELX Group (Netherlands)]
标识
DOI:10.2139/ssrn.3994453
摘要

Phenols are widely used for commercial production, while they have posed a threat to the environment and human health. Thus, investigation of convenient and efficient methods for detection, discrimination and degradation of phenols becomes particularly important. Herein, two new polyoxometalate (POM)-based compounds [Co2(btap)4(H2O)4][SiW12O40] (Co-POM) and [Ni2 (btap)4(H2O)4][SiW12O40] (Ni-POM) (btap = 3,5-bis(triazol-1-yl)pyridine), are prepared via a hydrothermal synthesis method. The compounds show a fascinating structural feature of POM-encapsulated two-fold interpenetrating dia metal-organic framework. More importantly, beside the novel structures, the compound Co-POM realizes three in one, namely, simultaneous detection, discrimination and degradation of phenols. Specifically, the Co-POM shows an excellent colorimetric detection performance towards phenol with the detection limit (LOD) ca. 1.32 μ M, which is lower than most reported colorimetric detectors for phenol. Also, a new colorimetric sensor system based on Co-POM can discriminate phenol, 4-chlorophenol and o-cresol with ease. Further, the Co-POM exhibits a photocatalytic degradation property for 4-chlorophenol under irradiation of visible light with the highest degradation rate of 62 % after irradiation 5 h. Therefore, this work provides a first example of POMs-based multi-functional material for achieving the detection, discrimination and degradation of phenolic pollutants.

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