Resumo

CHANG, Wei; ZHENG, Dandan; ZHAO, Chaosheng  e  YANG, Yixin. Photocatalytic Activity of MOF-derived Cu₂O/Cu/C/Ag Porous Composites. S.Afr.j.chem. (Online) [online]. 2019, vol.72, pp.10-15. ISSN 1996-840X.  http://dx.doi.org/10.17159/0379-4350/2019/v72a2.

Cu₂O/Cu/C/Ag porous composite was synthesized by heat-treatment and wet-chemical method using a typical metal-organic framework (Cu-BTC) as precursor. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and ultraviolet-visible spectroscopy (UV-vis). The results showed that the original structure of Cu-BTC was retained by high temperature calcination in nitrogen atmosphere. Uniform doping of Cu, C and Ag provided a triple trapping of photogenerated electron hole pairs and the Cu₂O/Cu/C/Ag exhibited an enhanced photocatalytic activity for degradation of Congo Red under visible light irradiation. Heat-treatment of the MOFs with high temperature is a facile and effective way for preparation of photocatalytic composite with desirable properties.

Palavras-chave : Photocatalyst; cuprous oxide; dye degradation; Cu-BTC.

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