Sensitivity improvement of TiO2-doped SnO2 to volatile organic compounds

Abstract Most of volatile organic compounds (VOCs) are often harmful or even toxic for environment, which require in situ detection. Here, we demonstrate that the TiO2 additive can enhance significantly gas-sensing properties of the SnO2-based sensor to VOCs, independent of its content and the concentration of tested gases. The improved gas-sensing quantities of matter, i.e., maximum sensitivity, minimum gas concentration, optimal operating temperature, and response and recovery times, are found to satisfy the basic needs for a practical application, which renders the TiO2–SnO2 composite material promising for the development of sensor devices to VOCs.

[1]  Zhihong Jing,et al.  Synthesis, characterization and gas sensing properties of undoped and Zn-doped γ-Fe2O3-based gas sensors , 2006 .

[2]  G. Meng,et al.  Preparation and gas-sensing properties of nano-CoTiO3 , 1999 .

[3]  Pallavi Shah,et al.  Synthesis of nanocrystalline SnO2 powder by amorphous citrate route , 2003 .

[4]  N. Yamazoe,et al.  STM observation of SnO2 (1 1 0) thermal-treated under oxidative condition , 2006 .

[5]  Katarzyna Zakrzewska,et al.  SnO2–TiO2 solid solutions for gas sensors , 1998 .

[6]  Computer simulation of the surface energy barrier of oxidic semiconductors with mobile donors , 1994 .

[7]  Yuan Zhang,et al.  Studies on alcohol sensing mechanism of ZnO based gas sensors , 2008 .

[8]  N. N. Padurow.  Mischbarkeit im System Rutil-Zinnstein , 2004, Naturwissenschaften.

[9]  K. Zakrzewska,et al.  Structural evolution of SnO2TiO2 nanocrystalline films for gas sensors , 2000 .

[10]  D. Speidel,et al.  Reexamination of the System TiO2‐SnO2 , 1972 .

[11]  D. Neamen.  Semiconductor physics and devices , 1992 .

[12]  Hsiao-Ching Lee,et al.  Enhancing the Sensitivity of Oxygen Sensors through the Photocatalytic Effect of SnO2/TiO2 Film , 2005 .

[13]  W. Yao,et al.  Structure and photocatalytic performances of glass/SnO2/TiO2 interface composite film , 2004 .

[14]  Andrew G. Glen,et al.  APPL , 2001 .

[15]  W. Y. Wang,et al.  Improvement in gas sensitivity of ZnO thick film to volatile organic compounds (VOCs) by adding TiO2 , 2004 .

[16]  M. Batzill,et al.  Surface Science Studies of Gas Sensing Materials: SnO2 , 2006, Sensors (Basel, Switzerland).

[17]  Giorgio Sberveglieri,et al.  Ti–W–O sputtered thin film as n- or p-type gas sensors , 2000 .

[18]  Yude Wang,et al.  Preparation and gas-sensing properties of perovskite-type MSnO3 (M=Zn, Cd, Ni) , 2002 .

[19]  K. Balkus,et al.  Mesoporous Molecular Sieve Derived TiO2 Nanofibers Doped with SnO2 , 2007 .

[20]  C. Reddy,et al.  Preparation of Fe2O3(0.9)–SnO2(0.1) by hydrazine method: application as an alcohol sensor , 2002 .

[21]  D. Neamen.  Semiconductor physics and devices basic principles Copy , 2004 .

[22]  Makoto Egashira,et al.  High H2 sensing performance of anodically oxidized TiO2 film contacted with Pd , 2002 .

[23]  J. Plenet,et al.  Titanium oxide thin layers deposed by dip-coating method: Their optical and structural properties , 2009 .

[24]  K. Zakrzewska,et al.  TiO2–SnO2 system for gas sensing—Photodegradation of organic contaminants , 2007 .

[25]  Craig A Grimes,et al.  Metal oxide nanoarchitectures for environmental sensing. , 2003, Journal of nanoscience and nanotechnology.

[26]  Sheikh A. Akbar,et al.  Selective detection of ethanol vapor using xTiO2–(1 − x)WO3 based sensor , 2003 .

[27]  P. Gouma,et al.  Comparison of sol–gel and ion beam deposited MoO3 thin film gas sensors for selective ammonia detection , 2003 .

[28]  Sheikh A. Akbar,et al.  TiO2–SnO2 nanostructures and their H2 sensing behavior , 2005 .

[29]  Gwo-Bin Lee,et al.  Characterization of SnO2/TiO2 Double-Layer Films as Alcohol Sensing Materials , 2004 .

[30]  N. Yamazoe,et al.  Oxide Semiconductor Gas Sensors , 2003 .