Effect of different oxidizing agent treatments on the surface properties of activated carbons

被引：508

作者：

Pradhan, BK

Sandle, NK

机构：

[1] Indian Inst Technol, Dept Chem, New Delhi 110016, India

[2] Tohoku Univ, ICRS, Sendai, Miyagi 9808577, Japan

来源：

CARBON | 1999年 / 37卷 / 08期

关键词：

activated carbon; oxidation; adsorption; FTIR; surface oxygen complexes;

D O I：

10.1016/S0008-6223(98)00328-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two commercially available activated carbon (activated charcoal cloth (ACC) and activated granular carbon(AGC)) were oxidized with different oxidizing agents viz., HNO3, H2O2 and (NH4)(2)S2O8, in order to introduce surface oxygen complexes. The effect of the oxidizing agent treatment on the surface chemical nature and surface texture were characterized by ultimate elemental analysis, bulk chemical analysis, FTIR, XRD and nitrogen adsorption isotherms studies. FTIR shows carboxylic groups were essentially fixed along with ketone and ether groups after the treatment of the oxidizing agents. The HNO3 treatment affects the surface area and the porosity of the samples to a greater extent than the others. The micropore values calculated from DR and alpha(s) methods reveals that 70% of the adsorption capacity of activated carbons is due to the micropore present. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：1323 / 1332

页数：10

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