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

doi:10.1007/s40242-021-1085-7

高等学校化学研究 ›› 2021, Vol. 37 ›› Issue (3): 496-504.doi: 10.1007/s40242-021-1085-7

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

LI Wenyan¹, LI Yanzi^1,2, LIU Jiadi³, CHAO Shen¹, YANG Tianyi¹, LI Lijuan⁴, WANG Ce¹, LI Xiang¹

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

收稿日期:2021-03-03 修回日期:2021-03-25 出版日期:2021-06-01 发布日期:2021-05-31
通讯作者: LI Xiang E-mail:xiangli@jlu.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China(No. 51773082).

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

LI Wenyan¹, LI Yanzi^1,2, LIU Jiadi³, CHAO Shen¹, YANG Tianyi¹, LI Lijuan⁴, WANG Ce¹, LI Xiang¹

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).

摘要/Abstract

摘要： 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.

关键词: Carbon@MnO₂ composite, Hollow nanofiber, Electrospinning, Lead adsorption

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

LI Wenyan, LI Yanzi, LIU Jiadi, CHAO Shen, YANG Tianyi, LI Lijuan, WANG Ce, LI Xiang. A Novel Hollow Carbon@MnO₂ Electrospun Nanofiber Adsorbent for Efficient Removal of Pb²⁺ in Wastewater[J]. 高等学校化学研究, 2021, 37(3): 496-504.

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

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

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