Nanostructured silicon oxide-nickel oxide sol-gel films with enhanced optical ca

2019-07-21 11:02:26

gas carbon films gel oxide

责任者: Martucci, Alessandro;Pasquale, Mirko;Guglielmi, Massimo;Post, Mike;Pivin, Jean Claude 单位: Dipto. Ingegneria Mecc. S. Materiali, Universita di Padova, Padova, Italy 来源出处: Journal of the American Ceramic Society,2003,86(9):1638-1640 摘要: Sol-gel derived silica (SiO2) 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. 关键词: Silica;Nanostructured materials;Nickel compounds;Amines;Porosity;Opacity;Temperature;Particle size analysis;Molecular structure;Transmission electron microscopy;X ray diffraction analysis;Rutherford backscattering spectroscopy;Sol-gel derived silica films;Hydrolysable siloxane groups;Elastic recoil detection analysis;Glancing incidence X ray optics