Effects of structural and surface energetic heterogeneity properties of novel corn grain-based activated carbons on dye adsorption

被引：35

作者：

Balathanigaimani, M. S. ^{[1
,2
]}

Shim, Wang-Geun ^{[1
,2
]}

Park, Kwang Hyun ^{[1
,2
]}

Lee, Jae-Wook ^{[3
]}

Moon, Hee ^{[1
,2
]}

机构：

[1] Chonnam Natl Univ, Ctr Funct Nano Fine Chem, Kwangju 500757, South Korea

[2] Chonnam Natl Univ, Sch Appl Chem Engn, Kwangju 500757, South Korea

[3] Chosun Univ, Dept Chem & Biochem Engn, Kwangju 501759, South Korea

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2009年 / 118卷 / 1-3期

关键词：

Corn grain; Activated carbon; Adsorption; Surface heterogeneity; Methylene blue; Congo red; POROUS CARBON; AREA; NITROGEN; POROSITY; REMOVAL; BENZENE;

D O I：

10.1016/j.micromeso.2008.08.028

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Activated carbons (R-1/2, R-1/3 and R-1/4) were prepared from a novel corn grain precursor by varying the ratio between the carbonized corn grain char and chemical activating agent. The surface characteristics of corn grain-based activated carbons (CG-ACs) were analyzed by nitrogen adsorption isotherms, adsorption energy distributions (AEDs) and X-ray photoelectron spectroscopy (XPS) to evaluate their structural properties, energetic heterogeneities and surface functional groups. respectively. In addition, methylene blue (MB) and congo red (CR) adsorption capacities of highly porous CG-ACs were also examined. It was found that the physical properties and the liquid phase adsorption capacities of CG-ACs increase with ratio between the carbonized corn grain char and chemical activating agent. The results also indicated the higher MB adsorption capacities of CG-ACs compared to that of CR adsorption. The AED results for N-2, MB and CR on CG-ACs confirmed the energetically heterogeneous solid surface nature of CG-ACs as well as the decrease in adsorption capacity with increasing energetically heterogeneous solid surface. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：232 / 238

页数：7

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