Chemical Research in Chinese Universities ›› 2021, Vol. 37 ›› Issue (3): 496-504.doi: 10.1007/s40242-021-1085-7

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A Novel Hollow Carbon@MnO2 Electrospun Nanofiber Adsorbent for Efficient Removal of Pb2+ in Wastewater

LI Wenyan1, LI Yanzi1,2, LIU Jiadi3, CHAO Shen1, YANG Tianyi1, LI Lijuan4, WANG Ce1, LI Xiang1   

  1. 1. Alan G. MacDiarmid Institute, Jilin University, Changchun 130012, P. R. China;
    2. Teaching Experimental Center, Hebei Normal University for Nationalities, Chengde 067000, P. R. China;
    3. College of Plant Science, Jilin University, Changchun 130062, P. R. China;
    4. Department of Chemistry and Biochemistry, California State University, Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840, USA
  • Received:2021-03-03 Revised:2021-03-25 Online:2021-06-01 Published:2021-05-31
  • Contact: LI Xiang E-mail:xiangli@jlu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China(No. 51773082).

Abstract: Lead ion(Pb2+) is one of the most hazardous heavy metal ions in aquatic environments. Carbon materials and manganese dio-xide(MnO2) have been shown to be prospective adsorbents to cope with the lead pollution. In this study, a novel hollow carbon@MnO2 composite nanofiber adsorbent was prepared by the combination of electrospinning and carbonization. The PAN nanofiber membrane is subjected to a pre-oxidation and carbonization process, and then the obtained carbon nanofibers react with KMnO4 solution during the hydrothermal process to develop the hollow carbon@MnO2 nanofibers. The hollow carbon@MnO2 nanofibers displayed a higher adsorption capacity of Pb2+ than carbon and MnO2/PDA/PAN nanofibers. The maximum adsorption capacity toward Pb2+ by hollow carbon@MnO2 nanofibers was 460.83 mg/g. After 5 adsorption-desorption cycles, the carbon@MnO2nanofibers had a good recyclability and the removal efficiency remained 81.47%. Moreover, the removal efficiency of the hollow composite nanofibers for Pb2+ from real wastewater could reach 94.37%. This work shows a strategy for synthetics of the hollow carbon@MnO2 nanofibers, which exhibits a promising potential in actual wastewater treatment.

Key words: Carbon@MnO2 composite, Hollow nanofiber, Electrospinning, Lead adsorption