化工学报2016，Vol.67Issue(10)：4485-4492,8.DOI:10.11949/j.issn.0438-1157.20160148
多壁碳纳米管/二氧化硅纳米复合材料的制备及其吸油性能
Facile synthesis of MWCNT/SiO2 nano-composites as high-performance oil adsorbents
摘要
Abstract
Multi-walled carbon nanotubes-silica (MWCNT/SiO2)nano-composites were prepared from carboxylated MWCNTs and silica sol-gel nanoparticlesvia one-step scalable precipitation. Structure and physical properties of the nano-composite were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), thermogravimetric analysis (TGA), and porous surface area and pore size distribution analysis (BET & BJH). Adsorption removal of oil was evaluated in diesel water on the nano-composite in comparison with SiO2 sol-gel nanoparticles, pristine MWCNTs, and activated carbon. The nano-composite improved MWCNT agglomeration after surface modification by silica nanoparticles and formed dual microporous and mesoporous structures. The diesel removal efficiency of the nano-compositecould be up to 97.79% with adsorption equilibrium reached within 1 h. The adsorption process followed the pseudo second-order kinetics with the apparent activation energy at 11.37 kJ·mol−1 and the adsorption isotherms were fitted well with the Freundlich model. Overall, the nano-composite MWCNT/SiO2showed stronger adsorption capacity than the other three adsorbents.关键词
羧基多壁碳纳米管/硅溶胶/介孔-微孔/吸附动力学/纳米材料/复合材料/制备Key words
carboxylated carbon nano-tubes/silica sol/mesoporous-microporous/adsorption kinetics/nanomaterials/composites/preparation分类
化学化工引用本文复制引用
黄剑坤,刘会娥,黄扬帆,马雁冰,丁传芹..多壁碳纳米管/二氧化硅纳米复合材料的制备及其吸油性能[J].化工学报,2016,67(10):4485-4492,8.基金项目
中央高校基本科研业务费专项项目（14CX05031A）；黄岛区科技项目（201-1-49）。@@@@Foundation item：supported by the Fundamental Research Funds for the Central Universities (14CX05031A) and the Huangdao District Science and Technology Project (201-1-49) （14CX05031A）
