Vanadium oxide-porphyrin nanocomposites as gas sensor interfaces for probing low water content in ethanol

被引：37

作者：

Timm, Ronaldo A. ^{[1
]}

Falla, Maria P. H. ^{[2
]}

Huila, Manuel F. G. ^{[1
]}

Peres, Henrique E. M. ^{[2
]}

Ramirez-Fernandez, Francisco J. ^{[2
]}

Araki, Koiti ^{[1
]}

Toma, Henrique E. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Quim, BR-05508000 Sao Paulo, Brazil

[2] Univ Sao Paulo, Escola Politecn, BR-05508970 Sao Paulo, Brazil

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 146卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

Gas sensor; Nanocomposite; Vanadium pentoxide xerogel; Pyridyl porphyrin; MACROSCOPIC FIBERS; PENTOXIDE XEROGEL; FILMS; GELS; ELECTROCHEMISTRY; CHEMISTRY; NANOBELTS; HUMIDITY;

D O I：

10.1016/j.snb.2010.01.045

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Vanadium pentoxide xerogels (VXG) incorporating meso(3- and 4-pyridyl)porphyrin cobalt(III) species coordinated to four [Ru(bipy)(2)Cl](+) complexes were employed as gas sensing materials capable of detecting small amounts of water in commercial ethanol and fuel supplies. According to their X-ray diffraction data, the original VXG lamellar framework was maintained in the nanocomposite material, but the interlamellar distance increased from 11.7 to 15.2 angstrom, reflecting the intercalation of the porphyrin species into the vanadium pentoxide matrix. The films generated by direct deposition of the nanocomposite aqueous suspensions exhibited good electrical and electrochemical performance for application in resistive sensors. The analysis of water in ethanol and fuels was carried out successfully using an especially designed electric setup incorporating a laminar gas flow chamber and interdigitated gold electrodes coated with the nanocomposites. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：61 / 68

页数：8

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