Quantitative and Qualitative Analyses of Oxygen-containing Surface Functional Groups on Activated Carbon

doi:10.3969/j.issn.0251-0790.2012.03.022

Abstract

Abstract:

The petroleum coke based activated carbon was oxidized by ammonium persulfate. The type and distribution of oxygen-containing surface functional groups(OCFGs) on activated carbon before and after oxidation was monitored using elementary analysis, FTIR spectrometry, temperature-programmed desorption coupled with mass spectrometry(TPD-MS), X-ray photoelectron spectroscopy(XPS), and X-ray absorption near edge structure(XANES) spectroscopy. The results obtained from these methods were compared with each other. It was found that using the TPD-MS method currently reported in the literature to quantify various OCFGs on the carbon surface on the basis of TPD-CO₂ and TPD-CO profiles is significantly superior to the others due to its good accuracy and reproduction along with simple experimental conditions. Both of the concentration of OCFGs obtained by XPS and XANES methods are under the estimated ones.

Key words: Activated carbon, Oxygen-containing functional group, Quantitative analysis, Temperature-programmed desorption coupled with mass spectrometry(TPD-MS)

CLC Number:

O647
TQ424.1

TrendMD:

LI Na, ZHU Jian, ZHA Qing-Fang. Quantitative and Qualitative Analyses of Oxygen-containing Surface Functional Groups on Activated Carbon[J]. Chem. J. Chinese Universities, 2012, 33(03): 548.

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