Aggregation-regulated bioreduction process of graphene oxide by Shewanella bacteria  

作　　者：Kaixin Han Yibo Zeng Yinghua Lu Ping Zeng Liang Shen 

机构地区：[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

出　　处：《Chinese Journal of Chemical Engineering》2024年第5期56-62,共7页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(22178293);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 

分 类 号：TQ127.11[化学工程—无机化工]