物理化学学报2012，Vol.28Issue(5)：1269-1274,6.DOI:10.3866/PKU.WHXB201202242
电化学间接测量法研究谷胱甘肽在多壁碳纳米管和活性炭上的吸附
Electrochemical Indirect Measurement for the Study of Glutathione Adsorption on Multiwalled Carbon Nanotubes and Activated Carbon
摘要
Abstract
Because of the chemical reaction between Cr(VI) ions and glutathione, the peak reduction current of Cr(VI) ions decreases while adding glutathione (GSH) into a K2O2O7/H2SO4 solution. Thus the concentration of GSH can be detected indirectly by differential pulse voltammetry (DPV) analysis. This electrochemical indirect method was used to study the adsorption of GSH on multi-walled carbon nanotubes (MWCNTs) and activated carbon (AC), and can be used to determine the equilibrium relationship between GSH adsorption and its concentration. Unlike the result obtained from the active carbon, GSH adsorption on MWCNTs agrees better with that predicted by the Freundlich equation compared to that predicted by the Langmuir equation. The morphologies of MWCNTs and activated carbon were observed with scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The abundance of aggregated pores in MWCNTs is beneficial for the diffusion and adsorption of small GSH molecules, suggesting that MWCNTs could be developed as an adsorbent for small molecular substances.关键词
电化学间接测量法/谷胱甘肽/多壁碳纳米管/活性炭/吸附机理Key words
Electrochemical indirect measurement/ Glutathione/ MWCNTs/ Activated carbon/ Adsorption mechanism分类
化学化工引用本文复制引用
汤儆,曾峤,陈振东,黄向前..电化学间接测量法研究谷胱甘肽在多壁碳纳米管和活性炭上的吸附[J].物理化学学报,2012,28(5):1269-1274,6.基金项目
国家自然科学基金(21073038,21173048)资助项目 （21073038,21173048）
