摘要
利用过硫酸铵对石油焦基活性炭进行了氧化处理,并使用元素分析、傅里叶变换红外光谱(FTIR)、带质谱检测的程序升温脱附(TPD-MS)、X射线光电子能谱(XPS)和X射线吸收近边结构(XANES)等方法对样品进行了分析和表征,并对不同表征方法所得结果进行了对比分析.结果表明,元素分析所得结果与TPD-MS分析结果较吻合,XPS和XANES分析所得含氧量结果偏小.
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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第3期548-554,共7页
Chemical Journal of Chinese Universities
基金
国家重质油重点实验室开放基金(批准号:SKLVP201102008)资助
关键词
活性炭
含氧基团
定量分析
TPD-MS
Activated carbon
Oxygen-containing functional group
Quantitative analysis
Temperature-programmed desorption coupled with mass spectrometry（TPD-MS）
