Adsorption of VOCs on reduced graphene oxide
Adsorption of VOCs on reduced graphene oxide
复制标题
还原氧化石墨烯对 VOC 的吸附
DOI：
10.1016/j.jes.2017.08.022
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发表时间：
2018-05-01
影响因子：
6.9
通讯作者：
Ye, Daiqi
中科院分区：
文献类型：
--
作者：
Yu, Lian;Wang, Long;Ye, Daiqi
采用改进的Hummer方法合成氧化石墨烯（GO）和还原氧化石墨烯（rGO）。结果表明，该方法对石墨制备氧化石墨烯和还原氧化石墨烯是有效的。氧化石墨烯和还原氧化石墨烯的透射电镜（TEM）图像显示为片状形貌。由于碳表面存在含氧官能团，制备的氧化石墨烯的层间距高于还原氧化石墨烯。傅里叶变换红外光谱（FTIR）中-OH和C=O基团的存在以及拉曼光谱中g模式和2d模式的存在证实了GO和rGO的合成。rGO （292.6 m(2)/g）的比表面积大于GO （236.4 m(2)/g）。在动态吸附/解吸条件下，将制备的还原氧化石墨烯用作苯和甲苯（挥发性有机化合物（VOCs）的模式污染物）的吸附剂。还原氧化石墨烯的吸附量和突破次数均高于氧化石墨烯。还原氧化石墨烯对苯和甲苯的吸附量分别为276.4和304.4 mg/g。解吸实验表明，在150.0℃的温度下加热，废氧化石墨烯可以成功再生，其对苯和甲苯的优异吸附/解吸性能使氧化石墨烯成为一种潜在的VOC吸附材料。(C) 2017中国科学院生态环境科学研究中心Elsevier B.V.出版
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.