Morphological, structural, and gas-sensing characterization of tin-doped indium oxide nanoparticles

作者：Ayeshamariam A^*; Kashif M; Bououdina M; Hashim U; Jayachandran M; Ali M E

来源：Ceramics International, 2014, 40(1): 1321-1328.

DOI：10.1016/j.ceramint.2013.07.012

• Sol-gel combustion
• Sn-doped indium oxide
• Structural
• Electrical

Tin-doped indium oxide (ITO) nanoparticles with stable cubic phases were synthesized using a sol-gel combustion method that includes gelation and combustion in organic fuel. The influence of SnO2 on the phase and morphology of the In2O3 nanoparticles were studied by X-ray diffraction, scanning electron microscopy, and high resolution transmission electron microscopy (TEM), along with selected area electron diffraction. ITO nanoparticles with 11-20 nm crystallite size and 69-46 m(2)/g specific surface area were obtained. The lattice constant was nearly 10.12 angstrom, with orientation along the (222), (400), and (110) planes for all proportions of the doped SnO, indicating a stable cubic phase with high conductivity. The TEM micrograph of the ITO nanoparticles and powder revealed spherical morphology. The microstructure of the cured In2O3: Sn with Sn concentrations of 5, 10, 20, and 50 wt% demonstrated that the ITO nanoparticles clustered more densely with the increase in Sn concentration. The gas-sensing ability of the synthesized powders was demonstrated through the sensing of ethanol vapor at 200 degrees C.

• 出版日期2014-1