The fabrication and gas-sensing characteristics of the formaldehyde gas sensors with high sensitivity

Abstract Gas-sensing characteristics of CdO-mixed In2O3 to formaldehyde were investigated. Gas sensors of indirect heating type were fabricated by the sensitive materials. The phases in the resulting materials and the morphologies of the sensing layers were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively, before and after calcination. The effects of operating temperature on the sensor response and the response versus gas concentration properties of the CdO–In2O3 sensors were investigated. It was shown that the sensors exhibited good response properties to formaldehyde gas at low operating temperature, making them to be promising candidates for practical detectors to formaldehyde gas.

[1]  S. Capone,et al.  Nanostructured In2O3-SnO2 sol-gel thin film as material for NO2 detection , 2006 .

[2]  Xinghui Wu,et al.  Preparation and gas-sensing properties of perovskite-type SrFeO3 oxide , 2001 .

[3]  Nan Zhang,et al.  On-line monitoring of formaldehyde in air by cataluminescence-based gas sensor , 2006 .

[4]  Bernard Delmon,et al.  Chemical Sensors Based On Sno2 and Wo3 for the Detection of Formaldehyde - Cooperative Effects , 1993 .

[5]  Hengde Li,et al.  Mesostructured tin oxide as sensitive material for C(2)H(5)OH sensor. , 2002, Talanta.

[6]  A. Łącz,et al.  TG/DTA/MS/IR study on decomposition of cadmium malonate hydrates in inert and oxidative atmosphere , 2007 .

[7]  J. Ying,et al.  SnO2−In2O3 Nanocomposites as Semiconductor Gas Sensors for CO and NOx Detection , 2007 .

[8]  Rong-Hua Ma,et al.  A self-heating gas sensor with integrated NiO thin-film for formaldehyde detection , 2007 .

[9]  N. Bârsan,et al.  Grain size control in nanocrystalline In2O3 semiconductor gas sensors , 1997 .

[10]  Terry A. Ring,et al.  NiO thin-film formaldehyde gas sensor , 2001 .

[11]  L. Kong,et al.  Gas-sensing property and mechanism of CaxLa1−xFeO3 ceramics , 1996 .

[12]  Judith Rishpon,et al.  An electrochemical biosensor for formaldehyde , 2000 .

[13]  Peng Song,et al.  Formaldehyde-sensing characteristics of perovskite La0.68Pb0.32FeO3 nano-materials , 2005 .

[14]  F. Kruis,et al.  Size-dependent gas sensing properties of indium oxide nanoparticle layers. , 2007, Journal of nanoscience and nanotechnology.

[15]  R. P. Gupta,et al.  Oxide Materials for Development of Integrated Gas Sensors—A Comprehensive Review , 2004 .

[16]  Sudipta Seal,et al.  Nanocrystalline indium oxide-doped tin oxide thin film as low temperature hydrogen sensor , 2004 .

[17]  G. Neri,et al.  A highly sensitive oxygen sensor operating at room temperature based on platinum-doped In2O3 nanocrystals. , 2005, Chemical communications.

[18]  Udo Weimar,et al.  Properties of Indium Oxide Semiconducting Sensors Deposited by Different Techniques , 2006 .

[19]  Jinseong Kim,et al.  Combinatorial libraries of semiconductor gas sensors as inorganic electronic noses , 2003 .

[20]  C. Martelet,et al.  Development of highly selective and stable potentiometric sensors for formaldehyde determination. , 2000, Biosensors & bioelectronics.

[21]  Liang Feng,et al.  The fabrication and characterization of a formaldehyde odor sensor using molecularly imprinted polymers. , 2005, Journal of colloid and interface science.

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

[23]  Shihua Wu,et al.  Synthesis, characterization and gas sensing properties of undoped and Co-doped γ-Fe2O3-based gas sensors , 2006 .

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