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Synergy of Photocatalysis and Adsorption for Simultaneous Removal of Hexavalent Chromium and Methylene Blue by g-C 3 N 4 /BiFeO 3 /Carbon Nanotubes Ternary Composites

Author

Listed:
  • Huiwen Huo

    (College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China)

  • Xinjiang Hu

    (College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China)

  • Hui Wang

    (College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
    Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China)

  • Jiang Li

    (School of Architecture and Art, Central South University, Changsha 410082, China)

  • Guangyu Xie

    (College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China)

  • Xiaofei Tan

    (College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
    Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China)

  • Qi Jin

    (College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China)

  • Daixi Zhou

    (College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China)

  • Chuang Li

    (College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China)

  • Guoqiang Qiu

    (Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China)

  • Yunguo Liu

    (College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
    Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China)

Abstract

A novel graphite-phase carbon nitride (g-C 3 N 4 )/bismuth ferrite (BiFeO 3 )/carbon nanotubes (CNTs) ternary magnetic composite (CNBT) was prepared by a hydrothermal synthesis. Using this material, Cr(VI) and methylene blue (MB) were removed from wastewater through synergistic adsorption and photocatalysis. The effects of pH, time, and pollutant concentration on the photocatalytic performance of CNBT, as well as possible interactions between Cr(VI) and MB species were analyzed. The obtained results showed that CNTs could effectively reduce the recombination rate of electron-hole pairs during the photocatalytic reaction of the g-C 3 N 4 /BiFeO 3 composite, thereby improving its photocatalytic performance, while the presence of MB increased the reduction rate of Cr(VI). After 5 h of the simultaneous adsorption and photocatalysis by CNBT, the removal rates of Cr(VI) and MB were 93% and 98%, respectively. This study provides a new theoretical basis and technical guidance for the combined application of photocatalysis and adsorption in the treatment of wastewaters containing mixed pollutants.

Suggested Citation

  • Huiwen Huo & Xinjiang Hu & Hui Wang & Jiang Li & Guangyu Xie & Xiaofei Tan & Qi Jin & Daixi Zhou & Chuang Li & Guoqiang Qiu & Yunguo Liu, 2019. "Synergy of Photocatalysis and Adsorption for Simultaneous Removal of Hexavalent Chromium and Methylene Blue by g-C 3 N 4 /BiFeO 3 /Carbon Nanotubes Ternary Composites," IJERPH, MDPI, vol. 16(17), pages 1-18, September.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:17:p:3219-:d:263633
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    Cited by:

    1. Xiaoxi Cai & Jiang Li & Yunguo Liu & Xinjiang Hu & Xiaofei Tan & Shaobo Liu & Hui Wang & Yanling Gu & Lerong Luo, 2019. "Design and Preparation of Chitosan-Crosslinked Bismuth Ferrite/Biochar Coupled Magnetic Material for Methylene Blue Removal," IJERPH, MDPI, vol. 17(1), pages 1-19, December.

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