Adsorption of Phenol by Oxidized Multi-Walled Carbon Nanotubes

被引：0

作者：

Hai H. ^{[1
]}

Wang K. ^{[1
]}

Ma Y. ^{[1
]}

Zhang J. ^{[1
]}

Xia J. ^{[1
]}

Xing X. ^{[1
]}

Wang T. ^{[2
]}

机构：

[1] College of Life and Environmental Sciences, Minzu University of China, Beijing

[2] Department of Environmental Science and Engineering, Peking University, Beijing

来源：

Beijing Daxue Xuebao (Ziran Kexue Ban)/Acta Scientiarum Naturalium Universitatis Pekinensis | 2019年 / 55卷 / 05期

关键词：

Adsorption; Multi-walled carbon nanotubes; Oxidation modification; Phenols; π-π; conjugation;

D O I：

10.13209/j.0479-8023.2019.061

中图分类号：

学科分类号：

摘要：

Organic compounds pollution, especially phenolic compounds, has been a serious problem recently. Multi-walled carbon nanotubes (MWCNTs) were oxidized by mixed acid oxidation method to remove phenolic compounds by adsorption. Five typical phenolic compounds including phenol, p-cresol, p-methoxyphenol, p-hydroxybenzaldehyde and p-nitrophenol were selected and to be adsorbed on MWCNTs and MWCNTs-O, respectively. Results showed that compared with the unmodified MWCNTs, the adsorption capacity of five phenolic compounds on MWCNTs-O increased significantly. The adsorption amount of five phenols on MWCNTs-O was different and the order was p-nitrophenol >p-methoxyphenol > p-hydroxybenzaldehyde > p-cresol > phenol. Adsorption isotherm data for the five phenols fitted Langmuir model well, which proved that phenolic compounds on MWCNTs was monolayer chemisorption. Surface functional groups analyzation of MWCNTs-O indicated that acidic oxygen-containing functional groups increased. TEM and Raman spectroscopy showed the winding degree of MWCNTs decreased, and overall dispersion and the degree of graphitization increased. π-π conjugation between vertical π electrons on MWCNTs-O and π electrons of phenolic compounds was formed and the electronic energy (EE) could be used as indicator for phenols adsorption on MWCNTs-O. © 2019 Peking University.

引用

页码：961 / 967

页数：6

共 6 条

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