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Preparation of BaFe2O4/BaSO4 composite photocatalyst and study on the photocatalytic activity of degrading rhodamine B wastewater discharged from food processing plant
Received date: 2020-08-03
Online published: 2021-07-13
：The BaSO4,BaFe2O4 and BaSO4/BaFe2O4 composite photocatalysts were synthesized by the chemical method,tradi-tional sol-gel method and low temperature sintering technique.X-ray powder diffraction and fourier transform infrared spec-troscopy analysis showed that the structure of the main lattice phase did not change after the combination of BaSO4 and BaFe2O4.The surface morphology analysis showed that the BaSO4 particles were fine and uniform,while BaFe2O4 particles were large and had irregular morphology.When the BaSO4 and BaFe2O4 were combined,the particle size changed obviously.UV-vis absorption spectra showed that 5%BaSO4/BaFe2O4 composite photocatalyst had strong UV-vis light absorption capac-ity.The Eg values of BaSO4,BaFe2O4,5%BaSO4/BaFe2O4 and 10%BaSO4/BaFe2O4 photocatalysts were about 3.23,2.89,2.74 and 2.26 eV,respectively.The photocatalytic results showed that the 5%BaSO4/BaFe2O4 photocatalyst showed the highest pho-tocatalytic activity for the degradation of Rhodamine B dye than that of other catalysts.The analysis of photocatalytic mechanism showed that hole,hydroxyl radical and superoxide radical played important roles in dye degradation process.
Key words： sol-gel method; composite; BaSO4; BaFe2O4; photocatalytic activity
Wei Zheng , Fang Hou , Xiping Gao . Preparation of BaFe2O4/BaSO4 composite photocatalyst and study on the photocatalytic activity of degrading rhodamine B wastewater discharged from food processing plant[J]. Inorganic Chemicals Industry, 2021 , 53(7) : 113 -118 . DOI: 10.19964/j.issn.1006-4990.2020-0437
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