These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.
Pubmed for Handhelds
PUBMED FOR HANDHELDS
Search MEDLINE/PubMed
Title: Visible light photocatalytic degradation of MB using UiO-66/g-C3N4 heterojunction nanocatalyst. Author: Zhang Y, Zhou J, Feng Q, Chen X, Hu Z. Journal: Chemosphere; 2018 Dec; 212():523-532. PubMed ID: 30165279. 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 the dye molecules on the catalyst surface thereby facilitates the electron/hole transfer within the framework. The trapping experiment and electron spin resonance (ESR) results showed that superoxide radicals (•O2-) was the main oxidative species in the photodegradation of MB and the enhanced photocatalytic mechanism of UiO-66/g-C3N4 heterojunction hybrids was also proposed.[Abstract] [Full Text] [Related] [New Search]