DEGRADATION OF METHYL ORANGE BY CuO/g-C<sub>3</sub>N<sub>4</sub> ACTIVATED PEROXODISULFATE

ZHANG Shicheng; LI Simin; ZHU Jia

doi:10.13205/j.hjgc.202210006

Volume 40 Issue 10

Oct. 2022

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ZHANG Shicheng, LI Simin, ZHU Jia. DEGRADATION OF METHYL ORANGE BY CuO/g-C₃N₄ ACTIVATED PEROXODISULFATE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 40-48. doi: 10.13205/j.hjgc.202210006

Citation:

ZHANG Shicheng, LI Simin, ZHU Jia. DEGRADATION OF METHYL ORANGE BY CuO/g-C₃N₄ ACTIVATED PEROXODISULFATE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 40-48. doi: 10.13205/j.hjgc.202210006

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DEGRADATION OF METHYL ORANGE BY CuO/g-C₃N₄ ACTIVATED PEROXODISULFATE

doi: 10.13205/j.hjgc.202210006

1. College of Energy and Environmental Engineering, Hebei University of Technology, Handan 056038, China;
2. School of Materials and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518000, China

Received Date: 2022-01-12

Abstract

Abstract

In this paper, the CuO/g-C₃N₄ was synthesized by the hydrothermal-calcination method, and its basic properties were characterized by X-ray diffractometer, scanning electron microscope, infrared absorption spectroscopy and X-ray energy spectroscopy. Under different parameters, CuO/g-C₃N₄ activated peroxodisulfate (PDS) system to remove organic pollutants (methyl orange, MO). The results of activation experiments show that CuO/g-C₃N₄ has a significant effect on activating PDS and degrading MO. Through the optimization experiment, it can be seen that under the conditions of 8 h of hydrothermal time of catalyst, 10% of CuO composite ratio, initial concentration of catalyst in the reaction system of 1.00 g/L, initial concentration of PDS of 4 mmol/L and pH=3, the degradation rate of internal MO is as high as 99.20% in 30min. Further mechanism exploration verified that sulfate radicals (SO₄^-·) and hydroxyl radicals (·OH) on the surface of the catalyst are the main active substances that degrade MO, and a small amount of superoxide radicals (·O₂^-) participate in them. The catalyst was repeated 5 times, and the degradation rate of MO remained above 90% after activating PDS, indicating that the catalyst had a good stability.
- g-C₃N₄,
- copper oxide,
- persulfate,
- methyl orange,
- oxidative degradation

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