The effects of ambient gases on the surface resistance of polyoxometalate/TiO2 film

Danfeng Li; Changzhi Gu; Caixin Guo; Changwen Hu

doi:10.1016/j.cplett.2003.12.043

The effects of ambient gases on the surface resistance of polyoxometalate/TiO₂ film

Danfeng Li
, Changzhi Gu^*
, Caixin Guo
, Changwen Hu

^*Corresponding author for this work

CAS - Institute of Physics
Northeast Normal University
Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Polyoxometalate (POM)/TiO₂ (anatase phase) supramolecule composite films are synthesized and employed for studying the effects of adsorbed gas molecules on the surface resistance of films. Here the POM is the Keggin type lacunary PW₁₁O₃₉^7- polyanion. The POM/TiO₂ film's responses to noxious gases such as NH₃ and NO₂ are much better than those of pure TiO₂ films. This is attributed to the enhanced surface adsorption of gases, but also, and more importantly, to the POM's modification of the charge transfer process between the adsorbed gas and the film. Compared with pure TiO₂ film, the POM/TiO₂ film shows faster response and recovery time at its optimal working temperature of 430 K for NH₃ and 418 K for NO ₂, indicating that it has great potential for gas sensitivity at lower temperatures.

Original language	English
Pages (from-to)	55-59
Number of pages	5
Journal	Chemical Physics Letters
Volume	385
Issue number	1-2
DOIs	https://doi.org/10.1016/j.cplett.2003.12.043
State	Published - 2 Feb 2004
Externally published	Yes

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title = "The effects of ambient gases on the surface resistance of polyoxometalate/TiO2 film",

abstract = "Polyoxometalate (POM)/TiO2 (anatase phase) supramolecule composite films are synthesized and employed for studying the effects of adsorbed gas molecules on the surface resistance of films. Here the POM is the Keggin type lacunary PW11O397- polyanion. The POM/TiO2 film's responses to noxious gases such as NH3 and NO2 are much better than those of pure TiO2 films. This is attributed to the enhanced surface adsorption of gases, but also, and more importantly, to the POM's modification of the charge transfer process between the adsorbed gas and the film. Compared with pure TiO2 film, the POM/TiO2 film shows faster response and recovery time at its optimal working temperature of 430 K for NH3 and 418 K for NO 2, indicating that it has great potential for gas sensitivity at lower temperatures.",

author = "Danfeng Li and Changzhi Gu and Caixin Guo and Changwen Hu",

year = "2004",

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doi = "10.1016/j.cplett.2003.12.043",

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volume = "385",

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TY - JOUR

T1 - The effects of ambient gases on the surface resistance of polyoxometalate/TiO2 film

AU - Li, Danfeng

AU - Gu, Changzhi

AU - Guo, Caixin

AU - Hu, Changwen

PY - 2004/2/2

Y1 - 2004/2/2

N2 - Polyoxometalate (POM)/TiO2 (anatase phase) supramolecule composite films are synthesized and employed for studying the effects of adsorbed gas molecules on the surface resistance of films. Here the POM is the Keggin type lacunary PW11O397- polyanion. The POM/TiO2 film's responses to noxious gases such as NH3 and NO2 are much better than those of pure TiO2 films. This is attributed to the enhanced surface adsorption of gases, but also, and more importantly, to the POM's modification of the charge transfer process between the adsorbed gas and the film. Compared with pure TiO2 film, the POM/TiO2 film shows faster response and recovery time at its optimal working temperature of 430 K for NH3 and 418 K for NO 2, indicating that it has great potential for gas sensitivity at lower temperatures.

AB - Polyoxometalate (POM)/TiO2 (anatase phase) supramolecule composite films are synthesized and employed for studying the effects of adsorbed gas molecules on the surface resistance of films. Here the POM is the Keggin type lacunary PW11O397- polyanion. The POM/TiO2 film's responses to noxious gases such as NH3 and NO2 are much better than those of pure TiO2 films. This is attributed to the enhanced surface adsorption of gases, but also, and more importantly, to the POM's modification of the charge transfer process between the adsorbed gas and the film. Compared with pure TiO2 film, the POM/TiO2 film shows faster response and recovery time at its optimal working temperature of 430 K for NH3 and 418 K for NO 2, indicating that it has great potential for gas sensitivity at lower temperatures.

UR - https://www.scopus.com/pages/publications/0942290300

U2 - 10.1016/j.cplett.2003.12.043

DO - 10.1016/j.cplett.2003.12.043

M3 - 文章

AN - SCOPUS:0942290300

SN - 0009-2614

VL - 385

SP - 55

EP - 59

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-2

ER -

The effects of ambient gases on the surface resistance of polyoxometalate/TiO₂ film

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