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在对单壁碳纳米管(SWCNT)、多壁碳纳米(MWCNT)及其相应含氧碳管的表征基础上,对OPEs的界面吸附行为进行了考察.结果表明,碳纳米管对OPEs具有较强的吸附能力(理论最大吸附量可达到412.0 mg·g-1).吸附等温线呈非线性吸附,Freundlich和Langmuir模型均能很好地拟合吸附等温线,校准相关系数分别在0.929—0.999和0.822—0.999范围内.碳纳米管与OPEs间的主要吸附作用机制为疏水相互作用,芳香取代OPEs与碳管管壁间的π-π电子供体受体相互作用对吸附有重要贡献.碳纳米管对OPEs的最大吸附量由碳管比表面积决定,而不受OPEs本身疏水特性的影响.碳管表面氧化引入的含氧基团能通过减弱碳管表面的疏水性和减少表面有效吸附位点来降低碳管对OPEs的吸附容量.
Based on the characterization of single-walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs) and their corresponding carbon nanotubes, the adsorption behavior of OPEs was investigated. The results showed that carbon nanotubes Strong adsorption capacity (the theoretical maximum adsorption capacity can reach 412.0 mg · g-1) .The adsorption isotherms are non-linear adsorption, Freundlich and Langmuir models fit the adsorption isotherms well, the calibration correlation coefficients are in the range of 0.929-0.999 And 0.822-0.999, respectively.The main adsorption mechanism between carbon nanotubes and OPEs is hydrophobic interaction, and the interaction between aromatic substituted OPEs and the π-π electron donor acceptor in the tube wall of carbon nanotubes has an important contribution to the adsorption. The maximum adsorption capacity of OPEs by nanotubes is determined by the specific surface area of carbon nanotubes without being affected by the hydrophobic properties of OPEs. The oxygen-containing groups introduced by the surface oxidation of carbon nanotubes can reduce the surface hydrophobicity and reduce the effective adsorption sites Point to reduce carbon nanotubes adsorption capacity of OPEs.