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Promoting effect of nitration modification on activated carbon in the catalytic ozonation of oxalic acid
Alternative TitleAppl. Catal. B-Environ.
Cao, Hongbin1,2,3; Xing, Linlin1,2,3; Wu, Guangguo1,2,3; Xie, Yongbing1,2,3; Shi, Shaoyuan1,2,3; Zhang, Yi1,2,3; Minakata, Daisuke4; Crittenden, John C.4
2014-03-01
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume146Issue:1Pages:169-176
AbstractA commercial activated carbon (AC) was modified with a nitration or amination method, and the effects of textural and chemical properties on the ability of the AC samples to destroy oxalic acid (OA) using ozone was investigated in this work. The degradation rates of OA on the nitrated and aminated AC samples increased by 38.5% and 9.6%, respectively. The adsorption capacity of the AC sample was not enhanced after modification, but the decomposition rate of ozone in solution increased. The surface area of AC significantly decreased after nitration because the entrance of micropores and some larger pores were blocked by the modified functional groups. In addition, the surface area was recovered when the nitrated AC was further aminated. We demonstrated that the enhancement in the catalytic activity was primarily caused by the differences in surface chemistry. The pH(pzc) values and Boehm titration results showed that nitration increased the acidity of the AC, while more basic groups were grafted after amination. X-ray photoelectron spectroscopy (XPS) and temperature programmed desorption (TPD) results confirmed that-NO2 and acid oxygenated groups were simultaneously grafted onto AC during nitration. Meanwhile, the-NO2 group was completely reduced to-NH2 and the carboxylic groups were partially reduced during amination. The basic groups (-NH2 and possible pyrone groups) enhanced the catalytic activity of the aminated AC sample, and the increased activity of the nitrated AC material was mainly due to the acid oxygenated surface groups. (C) 2013 Elsevier B.V. All rights reserved.; A commercial activated carbon (AC) was modified with a nitration or amination method, and the effects of textural and chemical properties on the ability of the AC samples to destroy oxalic acid (OA) using ozone was investigated in this work. The degradation rates of OA on the nitrated and aminated AC samples increased by 38.5% and 9.6%, respectively. The adsorption capacity of the AC sample was not enhanced after modification, but the decomposition rate of ozone in solution increased. The surface area of AC significantly decreased after nitration because the entrance of micropores and some larger pores were blocked by the modified functional groups. In addition, the surface area was recovered when the nitrated AC was further aminated. We demonstrated that the enhancement in the catalytic activity was primarily caused by the differences in surface chemistry. The pH(pzc) values and Boehm titration results showed that nitration increased the acidity of the AC, while more basic groups were grafted after amination. X-ray photoelectron spectroscopy (XPS) and temperature programmed desorption (TPD) results confirmed that-NO2 and acid oxygenated groups were simultaneously grafted onto AC during nitration. Meanwhile, the-NO2 group was completely reduced to-NH2 and the carboxylic groups were partially reduced during amination. The basic groups (-NH2 and possible pyrone groups) enhanced the catalytic activity of the aminated AC sample, and the increased activity of the nitrated AC material was mainly due to the acid oxygenated surface groups. (C) 2013 Elsevier B.V. All rights reserved.
KeywordCatalytic Ozonation Activated Carbon Surface Modification Nitration Amination
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.apcatb.2013.05.006
URL查看原文
Indexed BySCI
Language英语
WOS KeywordOZONE/ACTIVATED CARBON ; OZONE DECOMPOSITION ; SURFACE-CHEMISTRY ; ORGANIC-COMPOUNDS ; AQUEOUS-SOLUTIONS ; WATER-TREATMENT ; RATE CONSTANTS ; ADSORPTION ; TEMPERATURE ; EFFICIENCY
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS IDWOS:000327904000020
Citation statistics
Cited Times:57[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8179
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Res Ctr Proc Pollut Control, Inst Proc Engn, Beijing 100190, Peoples R China
3.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
4.Georgia Inst Technol, Brook Byers Inst Sustainable Syst, Atlanta, GA 30332 USA
Recommended Citation
GB/T 7714
Cao, Hongbin,Xing, Linlin,Wu, Guangguo,et al. Promoting effect of nitration modification on activated carbon in the catalytic ozonation of oxalic acid[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2014,146(1):169-176.
APA Cao, Hongbin.,Xing, Linlin.,Wu, Guangguo.,Xie, Yongbing.,Shi, Shaoyuan.,...&Crittenden, John C..(2014).Promoting effect of nitration modification on activated carbon in the catalytic ozonation of oxalic acid.APPLIED CATALYSIS B-ENVIRONMENTAL,146(1),169-176.
MLA Cao, Hongbin,et al."Promoting effect of nitration modification on activated carbon in the catalytic ozonation of oxalic acid".APPLIED CATALYSIS B-ENVIRONMENTAL 146.1(2014):169-176.
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