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Nanostructured Silicon Oxide–Nickel Oxide Sol–Gel Films with Enhanced Optical Carbon Monoxide Gas Sensitivity
Author(s) -
Martucci Alessandro,
Pasquale Mirko,
Guglielmi Massimo,
Post Mike,
Pivin Jean Claude
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03533.x
Subject(s) - carbon monoxide , materials science , nickel oxide , nanocomposite , inorganic chemistry , oxide , chemical engineering , nickel , bifunctional , nanotechnology , chemistry , metallurgy , organic chemistry , catalysis , engineering
Sol–gel derived silica (SiO 2 ) films doped with nickel oxide (NiO) nanocrystals were fabricated. A bifunctional ligand was used, bearing amine groups capable of coordinating the nickel ions and hydrolysable siloxane groups for anchoring the metal complex moiety to the silicate matrix. Nickel oxide nanocrystals precipitated at 500°C while the film was still porous. The nanocomposite films showed a reversible change in the optical transmittance in the VIS‐NIR range when exposed to carbon monoxide gas. The effects of residual porosity, testing temperature, and carbon monoxide gas concentration on optical transmittance were studied.