Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (3): 440-448.doi: 10.1007/s40242-019-9025-5

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Enhanced Peroxymonosulfate Activation by NixCo1-xOOH for Efficient Catalytic Oxidation of Organic Pollutants

LYU Cong1,2, LI Yicheng1,2, FANG Chen3, FENG Wei1,2, SUN Wentian1,2, ZHANG Qihui1,2   

  1. 1. Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, P. R. China;
    2. Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, P. R. China;
    3. Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, USA
  • Received:2019-01-29 Revised:2019-04-16 Online:2019-06-01 Published:2019-05-29
  • Contact: LYU Cong E-mail:lvcong@jlu.edu.cn
  • Supported by:
    Supported by the Science and Technology Project of the Education Department of Jilin Province, China (No.JJKH20190125KJ) and the Natural Science Foundation of the Science and Technology Department of Jilin Province, China (No.20180101081JC).

Abstract: Peroxymonosulfate(PMS) has received increasing attention as viable technology for recalcitrant organics removal from polluted waters. Although promising, alternative heterogeneous catalysts with stable structure, strong hydrophilicity, environmental friendliness and excellent catalytic performance are highly desirable to facilitate the wide industrialization of PMS. In this work, Ni doped CoOOH catalyst was employed as PMS activator. Ni dopant had a significant influence on the morphology, structure and catalytic performance of CoOOH. Ni0.2Co0.8OOH exhibited the best catalytic performance. Reaction rate of Ni0.2Co0.8OOH was 2, 4, and 4.4 times that of CoOOH, CoFe2O4 and Co3O4, respectively. Moreover, Ni0.2Co0.8OOH/PMS system had potential application to organic pollutants and displayed a great catalytic activity over a broader pH value(e.g., 4-10). More importantly, Ni doping accelerated the transformation of Co(Ⅲ) and Co(Ⅱ) and formed active species CoOH+ and NiOH+, which were responsible to the enhancement of PMS activation. ·OH, SO4·-, O2·- and 1O2 were detected, indicating both non-radical and radical processes in the Ni0.2Co0.8OOH/PMS system. These findings provide a promising alternative to mixed-metal oxyhydroxides catalysts for PMS activation, demonstrating a great potential in environmental remediation and wastewater treatment.

Key words: Ni dopant, Sulfate radical, Superoxide radical, Singlet oxygen, Electron transfer