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Published on: June 13, 2018
Visible-Light-Responsive Polyoxometalate-Based Metal-Organic Frameworks for Photocatalytic Detoxification of Mustard
Zhen Jing1, Sen Liu1, Xiaodong Zhang1
1Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China.
Abstract:
Two [Ru(bpy)3]2+ derivative-incorporated polyoxometalate-based metal-organic frameworks (POM@MOFs), {Cd(H2O)3Mn3(H2O)9[Ru(dcbpy)3][PMo11VIMoVO40]}·6H2O (Ru-CdMn-PMo) and {Cd(H2O)3Cu3(H2O)9[Ru(dcbpy)3][PMo11VIMoVO40]}·6H2O (Ru-CdCu-PMo), have been prepared through a conventional hydrothermal method. The introduction of Ru metalloligands enhanced the visible light absorption of POM@MOFs, and the photocatalytic detoxification reaction of mustard gas simulant 2-chloroethyl ethyl sulfide (CEES) confirmed their fascinating photocatalytic performances. Under visible light irradiation (λ > 400 nm), both Ru-CdMn-PMo and Ru-CdCu-PMo exhibited efficient photocatalytic properties for the detoxification of CEES into nontoxic CEESO in air, with a selectivity of 97% and a TOF of 26.6 min-1. Besides, Ru-CdMn-PMo also exhibited commendable reusability and stability after three reaction cycles. In addition, EPR measurements and radical scavenging experiments were carried out to verify the generation of O2•- and 1O2, presenting reliable evidence for the detoxification mechanism.
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