CO Sensing Properties of TiO2 Based on the p-n Transition Induced by Carbon Monoxide at High Temperatures

doi:10.3724/SP.J.1077.2012.00458

Abstract

Abstract:

Rutile TiO₂ based semiconductor-type sensors were investigated for sensing CO within the temperature range from 600℃ to 800℃. The sensor showed p-type behavior to CO (20-2000 mg/m³) when tested in oxygen concentrations varied from 10% to 2% between 600℃ and 700℃. The response of the sensor decreased significantly as the temperature increased from 600℃ to 700℃ approaching to one. However, when the temperature was above 750℃, an n-type behavior of the sensor to CO was observed. This n-type response further increased when the temperature increased to 800℃. AC impedance was employed to study the conduction behaviors of the TiO₂ thick film in both varied oxygen concentrations and CO environment at 800℃. The results indicate that the change of the oxygen ion/vacancy concentrations in the bulk TiO₂ is probably the reason for the p-n conduction transition induced by CO.

Key words: TiO₂, p-n conduction transition, high temperature CO sensors, impedance spectrum

CLC Number:

TQ174

ZHANG Jian-Wei, SUN Fang-Jie, LI Xiao-Gan, YU Jun, WANG Jing, YAN Wei-Ping, TANG Zhen-An. CO Sensing Properties of TiO₂ Based on the p-n Transition Induced by Carbon Monoxide at High Temperatures[J]. Journal of Inorganic Materials, 2012, 27(5): 458-462.

Figures/Tables 6

Fig. 1 (a) XRD pattern and (b) SEM image of the surface of the TiO2 thick film

Fig. 2 (a) Sensitivity of TiO2 sensor to CO at different temperatures from 600℃ to 800℃; (b) p-n conduction transition observed at 745℃

Fig. 3 Two probe DC resistance of TiO2 thick film in various gas environments

Table 1 Comparison of resistances of the TiO2 thick film obtained by using the two-probe DC method and AC impedance in various gas environments

Resistance/ (×10⁵, Ω)	O₂or CO
Resistance/ (×10⁵, Ω)	25%	12.5%	5%	1832 mg/cm³CO in 5%O₂
R_dc	3.91	4.11	4.30	2.28
R_ac	3.43	3.59	3.89	2.36
R_dc-R_ac	0.48	0.52	0.41	-0.08

Fig. 4 AC impedance spectra of the TiO2 thick film in various gas environments

Fig. 5 Response curve of the TiO2 sensor to CO in different oxygen concentrations at 800℃

References 17

[1]	Akbar S A, Dutta P K, Lee C. High-temperature ceramic gas sensors: a review. Int. J. Appl. Ceram. Technol., 2006, 3(4): 302-311.
[2]	Ménil F, Coillard V, Lucat C. Critical review of nitrogen monoxide sensors for exhaustive gases of lean burn engines. Sensors and Actuators B: Chemical, 2000, 67(1/2): 1-23.
[3]	Miura N, Wang J, Nakatou M, et al. NOx sensing characteristics of mixed-potential-type zirconia sensor using NiO sensing electrode at high temperatures. Electrochem. Solid-State Lett., 2005, 8(2): H9-H11.
[4]	Hibino T, Wang S, Kakimoto S, et al. Detection of propylene under oxidizing conditions using zirconia-based potentiometric sensor. Sensors and Actuators B: Chemical, 1998, 50(2): 149-155.
[5]	Fergus J W. Solid electrolyte based sensors for the measurement of CO and hydrocarbon gases. Sens. Actuators B, 2006, 122(2): 683-693.
[6]	Fleischer M, Meixner H. Sensitive, selective and stable CH4 detection using semiconducting Ga2O3 thin film. Sensors and Actuators B: Chemical, 1995, 26(1/2/3): 81-84.
[7]	Birkefeld L D, Azad A M, Akbar S A. Carbon monoxide and hydrogen detection by anatase modification of titanium dioxide. J. Am. Ceram. Soc.,1992, 75(11): 2964-2969.
[8]	Dutta P K, Ginwalla A, Hogg B, et al. Interaction of CO with anatase surfaces at high temperatures: optimization of a CO sensor. J. Phys. Chem. B. 1999, 103(21): 4412-4422.
[9]	Savage N, Chwieroth B, Ginwalla A, et al. Composite n-p semiconducting titanium oxides as gas sensors. Sensors and Actuators B: Chemical, 2001, 79(1): 17-27.
[10]	Savage N, Akbar S A, Dutta P K. Titanium dioxide based high temperature carbon monoxide selective sensor. Sensors and Actuators B: Chemical, 2001, 72(3): 239-248.
[11]	Dutta P K, De Lucia M F. Correlation of catalytic activity and sensor response in TiO2 high temperature gas sensors. Sensors & Actuators B: Chemical, 2006, 115(1): 1-3.
[12]	Trimboli J, Mottern M, Verweij,H.et al. Interaction of water with titania: implications for high-temperature gas sensing. J. Phys. Chem. B, 2006, 110(11): 5647-5654.
[13]	Hoefer U, Frank J, Fleischer M. High temperature Ga2O3-gas sensors and SnO2-gas sensors: a comparison. Sens. Actuators B, 2001, 78(1/2/3): 6-11.
[14]	Gurlo A, Sahm M, Oprea A, et al. A p- to n-transition on α-Fe2O3 -based thick film sensors studied by conductance and work function change measurements. Sensors and Actuators B: Chemical, 2004, 102(2): 291-298.
[15]	Gurlo A, Barsan N, Oprea A, et al. An n- to p-type conductivity transition induced by oxygen adsorption on α-Fe2O3. Appl. Phys. Letts., 2004, 85(12): 2280-2282.
[16]	Solis J L, Golovanov V, Lantto V, et al. A study of dual conductance response to carbon monoxide of CdS and α-SnWO4 thin films. Physica Scripta, 1994, T54: 248-251.
[17]	Nowotny J, Radecka M, Rekas M, et al. Electronic and ionic conductivity of TiO2 single crystal within the n-p transition range. Ceramics International, 1998, 24(8): 571-577.

CO Sensing Properties of TiO₂ Based on the p-n Transition Induced by Carbon Monoxide at High Temperatures

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