Synthesis and characterization of nitrogen-doped carbon xerogels

被引：138

作者：

Gorgulho, Honoria F. ^{[1
,2
]}

Goncalves, Filomena ^{[1
]}

Pereira, Manuel Fernando R. ^{[1
]}

Figueiredo, Jose L. ^{[1
]}

机构：

[1] Univ Porto, Fac Engn, Dept Engn Quim, Lab Associado LSRE LCM,Lab Catalise & Mat, P-4200465 Oporto, Portugal

[2] Univ Fed Sao Joao del Rei, Dept Ciencias Nat, BR-36300000 Sao Joao Del Rei, MG, Brazil

来源：

CARBON | 2009年 / 47卷 / 08期

关键词：

SURFACE-CHEMISTRY; ACTIVATED CARBONS; FUNCTIONAL-GROUPS; AEROGELS; MORPHOLOGY; TEXTURE; MATRIX; PH;

D O I：

10.1016/j.carbon.2009.03.050

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：

Carbon xerogels were prepared from a nitrogen-containing polymer precursor, using melamine and urea as nitrogen sources incorporated into the polymer matrix using the sol-gel process. To investigate the effects of nitrogen on the texture, morphology and surface chemistry, the carbon xerogels were characterized by nitrogen adsorption, scanning electron microscopy, X-ray photoelectron spectroscopy (XPS), and acid-base titrations. The results showed that nitrogen was incorporated onto the surface as pyridine, pyrrolic/pyridine, quaternary nitrogen, and pyridine-N-oxide. From the deconvolution of the XPS spectra, the pyrrolic/pyridine and quaternary nitrogen functionalities were found to dominate in the samples prepared from urea. All samples showed increased basicity after nitrogen incorporation. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2032 / 2039

页数：8

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