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Vol. 116, Issue 5, May 2010, pp. 28-37

 

Bullet

 

Effect on Ethanol Gas Sensing Performance of Cu Addition to TiO2 Thick Films

 

1 *C. G. DIGHAVKAR, 1A. V. PATIL, 2S. J. PATIL and 2R. Y. BORSE

1Department of Electronic Science, L.V.H. College, Panchavati, Nasik-422003, Maharashtra., India

2 Thick film laboratory, Department of Electronic Science, M.S.G. College,

Malegaon Camp, Dist- Nasik , Maharashtra, India

*Tel.: +91-9423925523

E-mail: cgdighavkar@gmail.com, ratanborse@yahoo.co.in

 

 

Received: 8 March 2010   /Accepted: 24 May 2010   /Published: 31 May 2010

 

Abstract: The preparation, characterization and gas sensing properties of Cu loaded thick films with TiO2 semiconductor oxides have been investigated. These films of oxides were obtained by loading various concentrations (1 wt. %, 3 wt. %, 5 wt. %, 7 wt. % and 10 wt. %) of Cu in TiO2 on alumina substrate by using screen printing technique. Pure TiO2 was observed to be insensitive to ethanol gas. However, TiO2 film loaded with 10 wt. % Cu was observed to be highly sensitive to ethanol gas. The sample was observed to be oxygen deficient. The Ethanol gas sensing studies were carried out on a static gas sensing system under normal laboratory conditions. D.C. Resistance of TiO2 films were measured by half-bridge method in an atmosphere at different temperatures. The crucial gas response was found to ethanol gas at 300 0C and no cross response was observed to other hazardous and polluting gases. The effects of loading concentration on the gas sensitivity, selectivity, response and recovery of the sensor in the presence of ethanol gas were studied and discussed.

 

Keywords: TiO2, Cu, Еhick films, Screen printing, Ethanol

 

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