Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (8): 1187-1197.DOI: 10.1016/S1872-2067(19)63377-2

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Decorating Ag/AgCl on UiO-66-NH2: Synergy between Ag plasmons and heterostructure for the realization of efficient visible light photocatalysis

Wanyue Zhao, Tong Ding, Yating Wang, Moqing Wu, Wenfeng Jin, Ye Tian, Xingang Li   

  1. Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin Key Laboratory of Applied Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:2019-03-12 Revised:2019-04-11 Online:2019-08-18 Published:2019-06-21
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (21676182), the National Basic Research Program of China (973 Program, 2014CB932403), and the Program for Introducing Talents of Discipline to Universities of China (B06006).

Abstract: UiO-66-NH2, as typical visible light responsive Zr-based metal-organic frameworks (MOFs), has attracted great interest in recent years. However, rapid combination of the photoinduced carriers limits its further application. Here, we designed a facile precipitation-photoreduction method to post-synthetically decorate Ag/AgCl on the surface of UiO-66-NH2 and form a heterostructure. Metallic Ag can not only transmit electrons between UiO-66-NH2 and AgCl but also absorb visible light, because of the surface plasmon resonance (SPR) effect. The rhodamine B photodegradation rate of UiO-66-NH2/Ag/AgCl (16.2 wt.% Ag) is about 10 and 4 times those of UiO-66-NH2 and Ag/AgCl, respectively. The SPR effect of Ag NPs and the formation of a heterostructure synergistically increase the absorbability of visible light, accelerate the separation of photoinduced charges, and promote the formation of superoxide radicals. We expect that our work could provide a new viewpoint for constructing efficient MOF-based photocatalytic systems.

Key words: UiO-66-NH2, Ag/AgCl, Heterostructure, Visible light photocatalysis, Superoxide radical