Visible light photocatalytic degradation of MB using UiO-66/g-C3 N4 heterojunction nanocatalyst

Chemosphere
Ying ZhangZeshu Hu

Abstract

A unique hybrid of Zr-based metal-organic framework (UiO-66) with graphitic carbon nitride (g-C3N4) nanosheets was synthesized by a facile annealing method. Photocatalytic effect was measured by the photodegradation of methylene blue (MB) under visible light irradiation. The morphology, structure, and porous properties of the as-synthesized composites were characterized by using transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), the thermogravimetric and differential scanning calorimetry analysis (TG-DSC), diffuse reflectance UV-vis spectroscopy (UV-vis DRS), photoluminescence (PL), and N2 sorption-desorption isotherms (BET). The results showed that about 100% of MB (200 mL of 10 mg L-1) photodegradation was achieved by the UiO-66/g-C3N4 hybrids (UC 10:10) in 240 min under visible light. The enhanced photocatalytic activity could be attributed to the heterojunction between UiO-66 and g-C3N4 therefore the photoelectron transfers efficiently from the conduction band (CB) of g-C3N4 to the CB of UiO-66 through the inner electric field generated by the heterojunction resulting the decreasing of recombination of electron/hole and the porous structures which enhance adsorption of t...Continue Reading

Citations

May 16, 2020·The Science of the Total Environment·Zhongshan ChenXiangxue Wang
Aug 3, 2019·ACS Applied Materials & Interfaces·Yanan WangQin Zhong

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