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A MOF-derived ZIF-8@Zn₁₋ₓNiₓO photocatalyst with enhanced photocatalytic activity

Author:
Jing, Yanqiu, Wang, Jianan, Yu, Baohua, Lun, Jin, Cheng, Yuyuan, Xiong, Bin, Lei, Qiang, Yang, Yongfeng, Chen, Liangyuan, Zhao, Mingqin
Source:
RSC advances 2017 v.7 no.67 pp. 42030-42035
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy, X-ray diffraction, nickel, photocatalysis, photocatalysts, reflectance spectroscopy, rhodamines, scanning electron microscopy, silver nitrate, ultraviolet radiation, zinc oxide
Abstract:
Today, metal doped ZnO exhibits good performances and attracts worldwide attention. In this paper, a ZIF-8@Zn₁₋ₓNiₓO photocatalyst was successfully prepared using MOF as precursor and AgNO₃ as catalyst. We explored the influence of Ni content on the photocatalytic activity of ZIF-8@Zn₁₋ₓNiₓO. The structure and properties of ZIF-8@Zn₁₋ₓNiₓO were characterized by XRD, SEM, FT-IR, BET, UV-vis diffuse reflectance spectroscopy and so on. The results show that Ni is well loaded in ZIF-8 and part of ZIF-8 is oxidized to form Zn₁₋ₓNiₓO composites. The photocatalytic performance of ZIF-8@Zn₁₋ₓNiₓO was evaluated by degradation of rhodamine B (RhB) solution under UV light. It was found that ZIF-8@Zn₀.₉₅Ni₀.₀₅O exhibited the highest photocatalytic degradation efficiency and can degrade 99.19% rhodamine B solution after 20 min under UV light. Furthermore, ZIF-8@Zn₀.₉₅Ni₀.₀₅O exhibits high stability. After five repeated cycles, its photocatalytic activity remains at 97.43%.
Agid:
6421494