Journal of Inorganic Materials ›› 2015, Vol. 30 ›› Issue (12): 1321-1326.DOI: 10.15541/jim20150201

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Photocatalytic Properties of MOF-derived ZnO/C, Ag/ZnO/C Porous Composite Materials

GUO Yan-Rong1, CHANG Wei1, ZHANG Wen2, WANG Hui3   

  1. (1. College of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710048, China; 2. School of Science, Xi’an Jiaotong University, Xi’an 710049, China; 3. School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)
  • Received:2015-04-24 Revised:2015-06-26 Published:2015-12-20 Online:2015-11-24
  • About author:GUO Yan-Rong. E-mail:


Two photocatalytic materials, ZnO/C and Ag/ZnO/C, were synthesized by high temperature heat-treatment and wet-chemical methods using a typical metal-organic framework (MOF-5) as precursor. The samples were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), X-ray energy dispersive spectroscope (EDS), and UV-Vis diffuse reflection spectroscope (UV-Vis DRS), respectively. After heat-treatment under nitrogen, the initial morphology of MOF-5 is mostly retained. As a result, relatively high surface area up to 390 m2/g of ZnO/C and 232 m2/g of Ag/ZnO/C are realized. The size of Ag particles loaded on Ag/ZnO/C is about 30 nm. The photocatalytic efficiencies of both ZnO/C and Ag/ZnO/C composites on photo-degradation of methylene blue (MB) are higher than that of commercial TiO2 powder (Degussa P25). Ag/ZnO/C possesses even higher photocatalytic ability, repeatability and stability than does ZnO/C. The results strongly suggest that high temperature heat-treatment of the MOF properly followed by moderate silver doping is a facile way to improve the photocatalytic properties.

Key words: metal-organic framework, dopping, ZnO, modification, photocatalysis

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