title: An efficient and environment-friendly method of removing graphene oxide in wastewater and its degradation mechanisms.
abstract: Graphene and graphene oxide (GO) have already existed in air, water and soil due to their popular application in functional materials. However, degradation of graphene and GO in wastewater has not been reported. Degradation of GO plays a key role in the elimination of graphene and GO in wastewater due to graphene being easily oxidized to GO. In this paper, GO was completely degraded to give CO2 by Photo-Fenton. The degradation intermediates were determined by UV-vis absorption spectra, elemental analysis (EA), fourier transform infrared (FT-IR) and liquid chromatography-mass spectrometry (LC-MS). Experimental results showed that graphene oxide was completely degraded to give CO2 after 28 days. Based on UV, FT-IR, LC-MS spectra and EA data of these degradation intermediates, the degradation mechanisms of GO were supposed. This paper suggests an efficient and environment-friendly method to degrade GO and graphene.
authors.affiliation: School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, PR China. Electronic address: zhangchaozhi@nuist.edu.cn.
authors.forename: Chao-Zhi
authors.initials: CZ
authors.lastname: Zhang
authors.affiliation: School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, PR China.
authors.forename: Ting
authors.initials: T
authors.lastname: Li
authors.affiliation: Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science and Technology, Nanjing 210044, PR China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science and Technology, Nanjing 210044, PR China.
authors.forename: Jianqiang
authors.initials: J
authors.lastname: Xu
mesh_terms: D002245:Carbon Dioxide / Q000138:chemical synthesis*; D002853:Chromatography, Liquid; D006108:Graphite / Q000737:chemistry*; D013058:Mass Spectrometry; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D002245:Carbon Dioxide; D006108:Graphite; D010087:Oxides; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Degradation; Graphene oxide; Mechanism; Photo-Fenton