SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 69 ›› Issue (5): 56-62.DOI: 10.1016/j.cjche.2024.01.008

• • 上一篇    下一篇

Aggregation-regulated bioreduction process of graphene oxide by Shewanella bacteria

Kaixin Han1, Yibo Zeng2, Yinghua Lu1, Ping Zeng3, Liang Shen1   

  1. 1. Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;
    2. Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China;
    3. Chinese Research Academy of Environmental Sciences, Beijing 100012, China
  • 收稿日期:2023-09-26 修回日期:2023-12-30 出版日期:2024-05-28 发布日期:2024-07-01
  • 通讯作者: Ping Zeng,E-mail:zengping@craes.org.cn;Liang Shen,E-mail:shenliang@xmu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22178293) and the Natural Science Foundation of Fujian Province of China (2022J01022).

Aggregation-regulated bioreduction process of graphene oxide by Shewanella bacteria

Kaixin Han1, Yibo Zeng2, Yinghua Lu1, Ping Zeng3, Liang Shen1   

  1. 1. Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;
    2. Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China;
    3. Chinese Research Academy of Environmental Sciences, Beijing 100012, China
  • Received:2023-09-26 Revised:2023-12-30 Online:2024-05-28 Published:2024-07-01
  • Contact: Ping Zeng,E-mail:zengping@craes.org.cn;Liang Shen,E-mail:shenliang@xmu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22178293) and the Natural Science Foundation of Fujian Province of China (2022J01022).

摘要: The bioreduction of graphene oxide (GO) using environmentally functional bacteria such as Shewanella represents a green approach to produce reduced graphene oxide (rGO). This process differs from the chemical reduction that involves instantaneous molecular reactions. In bioreduction, the contact of bacterial cells and GO is considered the rate-limiting step. To reveal how the bacteria-GO integration regulates rGO production, the comparative experiments of GO and three Shewanella strains were carried out. Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and atomic force microscopy were used to characterize the reduction degree and the aggregation degree. The results showed that a spontaneous aggregation of GO and Shewanella into the condensed entity occurred within 36 h. A positive linear correlation was established, linking three indexes of the aggregation potential, the bacterial reduction ability, and the reduction degree (ID/IG) comprehensively.

关键词: Graphene oxide, Reduced graphene oxide, Bioreduction, Aggregation, Shewanella

Abstract: The bioreduction of graphene oxide (GO) using environmentally functional bacteria such as Shewanella represents a green approach to produce reduced graphene oxide (rGO). This process differs from the chemical reduction that involves instantaneous molecular reactions. In bioreduction, the contact of bacterial cells and GO is considered the rate-limiting step. To reveal how the bacteria-GO integration regulates rGO production, the comparative experiments of GO and three Shewanella strains were carried out. Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and atomic force microscopy were used to characterize the reduction degree and the aggregation degree. The results showed that a spontaneous aggregation of GO and Shewanella into the condensed entity occurred within 36 h. A positive linear correlation was established, linking three indexes of the aggregation potential, the bacterial reduction ability, and the reduction degree (ID/IG) comprehensively.

Key words: Graphene oxide, Reduced graphene oxide, Bioreduction, Aggregation, Shewanella