Morphological and humidity sensing characteristics of SnO2�?�CuO, SnO2�?�Fe2O3 and SnO2�?�SbO2 nanocooxides

Bulletin of materials science

P K Khanna²  Preeti Sharma¹  B C Yadav¹ 

[1] Nanomaterials and Sensors Research Laboratory, Department of Physics, Lucknow University, Lucknow 226 007, India$$Nanomaterials and Sensors Research Laboratory, Department of Physics, Lucknow University, Lucknow 226 007, IndiaNanomaterials and Sensors Research Laboratory, Department of Physics, Lucknow University, Lucknow 226 007, India$$;Nanoscience Laboratory, Centre for Materials for Electronics Technology (C-MET), Off Dr. Homi Bhabha Road, Panchawati, Pune 411 008, India$$Nanoscience Laboratory, Centre for Materials for Electronics Technology (C-MET), Off Dr. Homi Bhabha Road, Panchawati, Pune 411 008, IndiaNanoscience Laboratory, Centre for Materials for Electronics Technology (C-MET), Off Dr. Homi Bhabha Road, Panchawati, Pune 411 008, India$$

关键词: Nanocooxides;    humidity sensors;    morphology;    porous media;    XRD;    SEM.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

This paper reports the synthesis of SnO₂â€�?�CuO, SnO₂â€�?�Fe₂O₃ and SnO₂â€�?�SbO₂ composites of nano oxides and comparative study of humidity sensing on their electrical resistances. CuO, Fe₂O₃ and SbO₂ were added within base material SnO₂ in the ratio 1 : 0.25, 1 : 0.50 and 1 : 1. Characterizations of materials were done using SEM and XRD. SEM images show the surface morphology and X-ray diffraction reveals the nanostructure of sensing materials. The pellets were annealed at 200, 400 and 600°C respectively for 3 h and after each step of annealing, observations were carried out. It was observed that as relative humidity (%RH) increases, there was decrease in the resistance of pellet for the entire range of RH. Results were found reproducible. SnO₂â€�?�SbO₂ shows maximum sensitivity for humidity (12 Mð›�?/%RH) among other composites.

【 授权许可】

Unknown