Copper sulfide as an excellent co-catalyst with K2S2O8 for dye decomposition in advanced oxidation process

Boyuan Zhu, Hao Cheng, Yong Qin, Jianfeng Ma, Yong Kong, Sridhar Komarneni

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Abstract

Copper sulfide (CuS) nanoparticles were prepared at 140 °C by a simple hydrothermal method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer, Emmett, Teller (BET) specific surface area method. Orange II (60 mg/L) was used as the target pollutant to investigate the degradation performance of CuS and K2S2O8 under visible light irradiation. The degradation efficiency reached 98.88% in CuS/K2S2O8/visible light system within 120 min, which showed very strong activity. Moreover, the catalyst also showed good stability and recycling performance for degrading Orange II. After three consecutive degradation cycles, the degradation efficiency of Orange II was found to be not less than 98%. The dye degradation mechanism was proposed as follows: Cu2+/Cu+ cycling catalyzed K2S2O8 to produce free radicals (SO4[rad]−), which significantly improved the oxidation ability of CuS/K2S2O8/visible light system.

Original languageEnglish (US)
Article number116057
JournalSeparation and Purification Technology
Volume233
DOIs
StatePublished - Feb 15 2020

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All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Filtration and Separation

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