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Influence of Cu doping on the structural, photoluminescence and formaldehyde sensing properties of SnO2 nanoparticles

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Title Influence of Cu doping on the structural, photoluminescence and formaldehyde sensing properties of SnO2 nanoparticles
 
Creator MISHRA, RK
KUSHWAHA, A
SAHAY, PP
 
Subject TIN OXIDE NANOWIRES
THIN-FILMS
GAS SENSOR
RAMAN-SPECTRA
ALCOHOL
TEMPERATURE
NANOFIBERS
NANOTUBES
NANOBELTS
SURFACE
 
Description In this paper we report Cu doping induced modifications in the structural, photoluminescence and gas sensing behaviour of SnO2 nanoparticles. Our results show that crystallinity is reduced upon Cu doping. The PL emissions observed in the visible region are attributed to the defect levels arising due to oxygen vacancies. The 1.5 at% Cu-doped SnO2 shows the selective high response (similar to 80%) to 50 ppm concentration of formaldehyde over methanol, ethanol, propanol-2-ol, acetone and n-butylacetate at 200 degrees C. The sensing mechanism has been explained based on chemisorption of oxygen on the SnO2 surface and the subsequent reaction between the adsorbed oxygen species and the formaldehyde molecules.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2014-12-29T06:00:45Z
2014-12-29T06:00:45Z
2014
 
Type Article
 
Identifier RSC ADVANCES, 4(8)3904-3912
2046-2069
http://dx.doi.org/10.1039/c3ra43709d
http://dspace.library.iitb.ac.in/jspui/handle/100/17257
 
Language English