Facile synthesis of MWCNT/SiO<sub>2</sub> nano-composites as high-performance oil adsorbents

HUANG Jiankun; LIU Hui'e; HUANG Yangfan; MA Yanbing; DING Chuanqin

doi:10.11949/j.issn.0438-1157.20160148

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Facile synthesis of MWCNT/SiO₂ nano-composites as high-performance oil adsorbents

更新时间：2025-11-26

- Facile synthesis of MWCNT/SiO₂ nano-composites as high-performance oil adsorbents
- CIESC Journal Vol. 67, Issue 10, Pages: 4485-4492(2016)
- 作者机构：
  
  中国石油大学(华东)重质油国家重点实验室,山东,青岛,266580
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160148
  CLC： Q013.2
- Online First：05 October 2016，
  
  Published：05 October 2016
- 稿件说明：
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HUANG Jiankun, LIU Hui'e, HUANG Yangfan, et al. Facile synthesis of MWCNT/SiO₂ nano-composites as high-performance oil adsorbents[J]. CIESC Journal, 2016, 67(10): 4485-4492. DOI: 10.11949/j.issn.0438-1157.20160148.
DOI：

HUANG Jiankun, LIU Hui'e, HUANG Yangfan, et al. Facile synthesis of MWCNT/SiO₂ nano-composites as high-performance oil adsorbents[J]. CIESC Journal, 2016, 67(10): 4485-4492. DOI: 10.11949/j.issn.0438-1157.20160148. DOI：

摘要

以羧化多壁碳纳米管为基体、纳米硅溶胶粒为增强相，通过一步液相共混方法制备多壁碳纳米管/二氧化硅纳米复合材料。利用傅里叶变换红外光谱（FTIR）、电子扫描电镜（SEM）、热重（TGA）、孔结构分析（BET/BJH）对其进行了表征。以水中柴油为研究对象考察了该样品对水中柴油的吸附脱除效果，并与纳米二氧化硅胶粒、原生碳纳米管以及活性炭进行对比。结果表明：硅溶胶粒表面修饰后的多壁碳纳米管的聚团行为得以改善，而且材料具有微孔-介孔双孔道结构。对水中直馏柴油的去除率高达97.79%，并于1 h达到吸附平衡。整个吸附过程遵循准二级动力学模型，吸附体系的表观活化能为11.37 kJ·mol-1，吸附等温线与Freundlich模型较为吻合，吸附效果明显强于其他3种吸附剂。

Abstract

Multi-walled carbon nanotubes-silica (MWCNT/SiO2) nano-composites were prepared from carboxylated MWCNTs and silica sol-gel nanoparticles via 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-composite could 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/SiO2 showed stronger adsorption capacity than the other three adsorbents.

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Facile synthesis of MWCNT/SiO2 nano-composites as high-performance oil adsorbents

DOI：10.11949/j.issn.0438-1157.20160148

摘要

Abstract

关键词

Keywords

references

Facile synthesis of MWCNT/SiO₂ nano-composites as high-performance oil adsorbents