Preparation and Characterization of Copper-Doped Tin Oxide Nanopowder via Hydrothermal Route

Copper-doped tin oxide nanopowder has been synthesized via the hydrothermal route, in which pure metallic Sn, diluted nitric acid solution and Cu(NO3)2 are used as the starting materials. The hydrothermal treatment at about 200°C for 10 h results in rutile crystalline SnO2 particles with a narrow size distribution typically in the range of 3~6 nm. The average crystallite size of 5 wt% CuO-doped SnO2 particles remains smaller than 12.5 nm even after annealing at 800°C. The evaluation of the sensitive properties of the synthesized powder with various amount of CuO doping is conducted on the thick-film samples fabricated by screen-printing method. The high sensitivity toward H2S as shown by the sensor test results show the possibility of using this material for gas sensor fabrication.

[1]  Deren Yang,et al.  A simple hydrothermal route for synthesizing SnO2 quantum dots , 2006 .

[2]  P. Maggard,et al.  Hydrothermal Synthesis and Photocatalytic Activities of SrTiO3‐Coated Fe2O3 and BiFeO3 , 2006 .

[3]  Giorgio Sberveglieri,et al.  Tin oxide nanobelts electrical and sensing properties , 2005 .

[4]  S. Han,et al.  Micro-bead of nano-crystalline F-doped SnO2 as a sensitive hydrogen gas sensor , 2005 .

[5]  Young Kyu Hwang,et al.  Nanostructured tin oxide: Synthesis and gas-sensing properties , 2005 .

[6]  Sudipta Seal,et al.  Inverse-catalyst-effect observed for nanocrystalline-doped tin oxide sensor at lower operating temperatures , 2005, Sensors and Actuators B: Chemical.

[7]  O. Tan,et al.  Nano-structured oxide semiconductor materials for gas-sensing applications , 2004 .

[8]  S. Seal,et al.  Room temperature hydrogen gas sensitivity of nanocrystalline pure tin oxide. , 2004, Journal of Nanoscience and Nanotechnology.

[9]  N. Barsan,et al.  Fundamental and practical aspects in the design of nanoscaled SnO2 gas sensors: a status report , 1999 .

[10]  David E. Williams.  Semiconducting oxides as gas-sensitive resistors , 1999 .

[11]  C. Reddy,et al.  Tin dioxide nanoparticles prepared by sol-gel method for an improved hydrogen sulfide sensor , 1999 .

[12]  D. Kohl,et al.  Nanostructured semiconductor gas sensors to overcome sensitivity limitations due to percolation effects , 1999 .

[13]  M. Rumyantseva,et al.  Effect of interdiffusion on electrical and gas sensor properties of CuO/SnO2 heterostructure , 1999 .

[14]  Ian Papautsky,et al.  Fluid-coupled hollow metallic micromachined needle arrays , 1998, Photonics West - Micro and Nano Fabricated Electromechanical and Optical Components.

[15]  Y. Qian,et al.  A novel method to prepare nanocrystalline SnO2 , 1996 .

[16]  Norio Miura,et al.  CuO-SnO2 element for highly sensitive and selective detection of H2S , 1992 .

[17]  Norio Miura,et al.  Sensing behavior of CuO-loaded snO2 element for H2S detection , 1991 .