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

Jing, Yanqiu, Wang, Jianan, Yu, Baohua, Lun, Jin, Cheng, Yuyuan, Xiong, Bin, Lei, Qiang, Yang, Yongfeng, Chen, Liangyuan, Zhao, Mingqin
RSC advances 2017 v.7 no.67 pp. 42030-42035
Fourier transform infrared spectroscopy, X-ray diffraction, nickel, photocatalysis, photocatalysts, reflectance spectroscopy, rhodamines, scanning electron microscopy, silver nitrate, ultraviolet radiation, zinc oxide
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%.