C-doped ZnO decorated with Au nanoparticles constructed from the metal-organic framework ZIF-8 for photodegradation of organic dyes

Recently, engineering metal-organic frameworks (MOFs) into metal oxides by solid state thermal decomposition has attracted wide attention for photocatalytic applications. Here, a series of C-doped ZnO materials decorated with Au nanoparticles (Au/C-ZnO) were constructed via controlled pyrolysis of Z...

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Bibliographic Details
Published in:RSC advances 2019-04, Vol.9 (22), p.12689-12695
Main Authors: Chang, Qiang-Qiang, Cui, Yi-Wei, Zhang, Hai-Huan, Chang, Fei, Zhu, Bao-Hua, Yu, Shi-Yong
Format: Article
Language:English
Subjects:
Catalytic activity
Chemistry
Deactivation
Dyes
Gold
Light irradiation
Metal-organic frameworks
Nanoparticles
Photocatalysis
Photodegradation
Pyrolysis
Synergistic effect
Thermal decomposition
X ray photoelectron spectroscopy
Zinc oxide
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Summary:Recently, engineering metal-organic frameworks (MOFs) into metal oxides by solid state thermal decomposition has attracted wide attention for photocatalytic applications. Here, a series of C-doped ZnO materials decorated with Au nanoparticles (Au/C-ZnO) were constructed via controlled pyrolysis of ZIF-8 adsorbing different amounts of HAuCl 4 ·4H 2 O. In this pyrolysis process, ZIF-8 was transformed into C-doped ZnO according to the EDX and XPS analysis. Meanwhile, HAuCl 4 ·4H 2 O was transformed into Au nanoparticles that were uniformly dispersed on the surface of C-ZnO as seen in TEM images. The photocatalytic activity of as-prepared catalysts was evaluated by the degradation of methyl orange under UV-vis light irradiation. It was found that the photocatalytic activity of Au/C-ZnO was better than C-ZnO and pure ZnO. Furthermore, Au/C-ZnO exhibited high photocatalytic stability. After three consecutive cycles, there was no noticeable deactivation in the reaction. This unusual photocatalytic activity was attributed to the synergistic effect of C-doping and Au NPs. C-doped ZnO decorated with Au nanoparticles (Au/C-ZnO) were prepared via one step pyrolysis of ZIF-8 adsorbing HAuCl 4 .
ISSN:2046-2069
2046-2069
DOI:10.1039/c8ra09985e