4.2 Article

Adsorption of VOCs on reduced graphene oxide

期刊

JOURNAL OF ENVIRONMENTAL SCIENCES
卷 67, 期 -, 页码 171-178

出版社

SCIENCE PRESS
DOI: 10.1016/j.jes.2017.08.022

关键词

Graphene oxide; Reduced graphene oxide; Volatile organic compounds; Adsorption

资金

  1. China Postdoctoral Science Foundation [2016M592496]
  2. National Natural Science Foundation of China [91645119, 21207039, U1201231, 51378218, 51108187, 50978103]
  3. Fundamental Research Funds for the Central Universities [2017BQ053, 2017BQ055]
  4. Natural Science Foundation of Guangdong Province, China [2014A030310431]
  5. Guangzhou Science and Technology Plan [201607010095]

向作者/读者索取更多资源

A modified Hummer's method was adopted for the synthesis of graphene oxide (GO) and reduced graphene oxide (rGO). It was revealed that the modified method is effective for the production of GO and rGO from graphite. Transmission electron microscopy (TEM) images of GO and rGO showed a sheet-like morphology. Because of the presence of oxygenated functional groups on the carbon surface, the interlayer spacing of the prepared GO was higher than that of rGO. The presence of -OH and C=O groups in the Fourier transform infrared spectra (FTIR) spectrum and G-mode and 2D-mode in Raman spectra confirmed the synthesis of GO and rGO. rGO (292.6 m(2)/g) showed higher surface area than that of GO (236.4 m(2)/g). The prepared rGO was used as an adsorbent for benzene and toluene (model pollutants of volatile organic compounds (VOCs)) under dynamic adsorption/desorption conditions. rGO showed higher adsorption capacity and breakthrough times than GO. The adsorption capacity of rGO for benzene and toluene was 276.4 and 304.4 mg/g, respectively. Desorption experiments showed that the spent rGO can be successfully regenerated by heating at 150.0 degrees C. Its excellent adsorption/desorption performance for benzene and toluene makes rGO a potential adsorbent for VOC adsorption. (C) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

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