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China Surfactant Detergent & Cosmetics ›› 2022, Vol. 52 ›› Issue (10): 1088-1093.doi: 10.3969/j.issn.1001-1803.2022.10.008

• Development and application • Previous Articles     Next Articles

Application of PoPD-TiO2-GO composite photocatalyst in adsorption and degradation of chemical dye wastewater

Zhang Qin,Shi Qiuhong*()   

  1. Guangxi Vocational and Technical Institute of Industry, Nanning, Guangxi 530003, China
  • Received:2022-05-23 Revised:2022-09-29 Online:2022-10-22 Published:2022-10-24
  • Contact: Qiuhong Shi E-mail:shiqiuhong5@126.com

Abstract:

TiO2-GO composite photocatalyst was prepared using graphite powder, phosphoric acid and sulfuric acid. On the basis of this catalyst, o-phenylendiamine was added to prepare the PoPD-TiO2-GO composite photocatalyst. The simulated chemical dye wastewater containing reactive black KN-B was prepared. These two new catalysts were added to the chemical dye wastewater, and the abilities of the catalysts in adsorption and degradation were analyzed on the light reaction apparatus and thermogravimetric analyzer. The experimental results show that, excessive addition of graphene in the two catalysts will increase the specific surface area but will lead to the decrease of absorbance. Therefore, the two catalysts with 3% graphene have better effects; With the increase of adsorption time, the adsorption rate and decolorization rate of PoPD-TiO2-GO are significantly higher than those of TiO2-GO. The greater the amount of the two catalysts, the stronger the decolorization capacity to chemical dye wastewater; the decolorization rate of PoPD-TiO2-GO remains above 70% after four cycles of degradation. When a variety of wastewater dyes are selected for the experiment, PoPD-TiO2-GO can still maintain a high decolorization rate. Therefore, the degradation performance of PoPD-TiO2-GO photocatalyst is good, which can degrade a variety of dye wastewater. In addition, the comprehensive ability of adsorption and degradation of PoPD-TiO2-GO is higher than that of TiO2-GO.

Key words: catalyst, chemical dye wastewater, adsorption degradation, absorbance, cyclic degradation

CLC Number: 

  • O643.36