文章摘要
陈璇莉,李 浩,吴 敏.富勒烯(C60)在纳米碳管和无机矿物中的吸附[J].农业环境科学学报,2014,33(7):1366-1371.
富勒烯(C60)在纳米碳管和无机矿物中的吸附
Fullerene(C60) Adsorption by Nanotubes and Inorganic Minerals
  
DOI:10.11654/jaes.2014.07.016
中文关键词: 富勒烯(C60)  纳米碳管  无机矿物  吸附
英文关键词: fullerene(C60)  carbon nanotubes  inorganic minerals  adsorption
基金项目:
作者单位
陈璇莉 昆明理工大学环境科学与工程学院 环境土壤科学重点实验室 昆明 650500 
李 浩 昆明理工大学环境科学与工程学院 环境土壤科学重点实验室 昆明 650500 
吴 敏 昆明理工大学环境科学与工程学院 环境土壤科学重点实验室 昆明 650500 
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中文摘要:
      为了揭示纳米碳管和无机矿物与富勒烯(C60)的相互作用机理,采用溶剂交换法制备出富勒烯胶体悬浮液,选取三种多壁纳米碳管:[羟基化多壁纳米碳管(MH)、羧基化多壁纳米碳管(MC)、石墨化多壁纳米碳管(MG)]和五种无机矿物:[二氧化硅(SiO2)、 蒙脱土K10(ML-K10)、蒙脱土KSF(ML-KSF)、高岭土325(KL-325)、高岭土6000(KL-6000)]作为吸附剂,通过批量吸附试验方法研究了富勒烯在不同吸附剂上的吸附行为。结果显示,三种纳米碳管和五种无机矿物均对富勒烯有一定的吸附能力,且Freundlich模型对其吸附行为具有较好的拟合度。在三种纳米碳管中,由于静电作用和疏水作用使得石墨化多壁纳米碳管(MG)对富勒烯的吸附能力最强;而五种无机矿物对富勒烯的吸附能力也存在差异:ML-KSF>ML-K10≈KL-6000>KL-325≈SiO2。这可能与无机矿物本身的结构和性质有关。
英文摘要:
      Because of their broad applications, fullerenes(C60) have raised concerns over the environmental safety. In this study, interactions of fullerene with environmental materials(carbon nanotubes and inorganic minerals) were examined in batch adsorption experiments. Solvent exchange method was used to produce fullerene colloidal suspensions. Three types of multi-walled carbon nanotubes:hydroxylation of multi-walled carbon nanotubes(MH), carboxylated multi-walled carbon nanotubes(MC), and graphitized carbon nanotubes(MG) and five types of inorganic minerals:silica(SiO2), montmorillonite K10(ML-K10), montmorillonite KSF(ML-KSF), kaolin 325(KL-325) and kaolin 6000(KL-6000) were chosen. Isotherms of fullerene on carbon nanotubes and inorganic minerals could be described better by Freundlich than by Langmuir models. Of carbon nanotubes, MG had the highest single-point adsorption capacity(Kd) and the strongest adsorption of fullerene because of the electrostatic and hydrophobic interaction. Among inorganic minerals, ML-KSF showed the greatest single-point capacity and intensity of adsorption, probably due to the presence of hydrophobic oxygen atom interlayer and positive and negative charges on the edges. Fullerene adsorption on kaolin(KL-6000 and KL-325) was closely related with the surface area.
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