Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (1): 78-86.DOI: 10.1016/S1872-2067(20)63661-0

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Hierarchically porous S-scheme CdS/UiO-66 photocatalyst for efficient 4-nitroaniline reduction

Jinxin Weia,b, Yawen Chena,b, Hongyang Zhanga,b, Zanyong Zhuanga,b,*(), Yan Yua,b,#()   

  1. aCollege of Materials Science and Engineering, Fuzhou University, New Campus, Fuzhou 350108, Fujian, China
    bKey Laboratory of Eco-Materials Advanced Technology, Fuzhou University, Fuzhou 350108, Fujian, China
  • Received:2020-03-11 Accepted:2020-04-25 Online:2021-01-18 Published:2021-01-18
  • Contact: Zanyong Zhuang,Yan Yu
  • About author:#E-mail: yuyan_1972@126.com
    *E-mail: zyzhuang@fzu.edu.cn;
  • Supported by:
    National Natural Science Foundation of China(U1905215);National Natural Science Foundation of China(51772053);National Natural Science Foundation of China(51672046)

Abstract:

Unveiling the pore-size performance of metal organic frameworks (MOFs) is imperative for controllable design of sophisticated catalysts. Herein, UiO-66 with distinct macropores and mesopores were intentionally created and served as substrates to create advanced CdS/UiO-66 catalysts. The pore size impacted the spatial distribution of CdS nanoparticles (NPs): CdS tended to deposit on the external surface of mesoporous UiO-66, but spontaneously penetrated into the large cavity of macroporous UiO-66 nanocage. Normalized to unit amount of CdS, the photocatalytic reaction constant of macroporous CdS/UiO-66 over 4-nitroaniline reduction was ~3 folds of that of mesoporous counterpart, and outperformed many other reported state-of-art CdS-based catalysts. A confinement effect of CdS NPs within UiO-66 cage could respond for its high activity, which could shorten the electron-transport distance of NPs-MOFs-reactant, and protect the active CdS NPs from photocorrosion. The finding here provides a straightforward paradigm and mechanism to rationally fabricate advance NPs/ MOFs for diverse applications.

Key words: Pore-size Effect, Nanoconfinement, Hierarchically porous MOFs, NPs/MOFs, Nanocage