Multifunctional Nanocomposite Thin Films by Aerosol‐Assisted CVD

Abstract

The aerosol‐assisted (AA)CVD reaction of titanium isopropoxide and a solution of preformed tin dioxide nanoparticles leads to the production of titanium dioxide/tin dioxide nanocomposite thin films on glass substrates. Scanning electron microscopy (SEM) studies show that film composition and morphology are linked, with larger island sizes being observed as more tin dioxide nanoparticles are incorporated into the films. Reflectance measurements performed on the nanocomposite thin films show an increase in reflection in the infrared (IR) portion of the spectrum with increased tin dioxide nanoparticle incorporation. Photocatalysis experiments indicate that the nanocomposite films are photo‐active with irradiation by 365 nm light. The nanocomposite thin films display both low‐emissivity and self‐cleaning functionalities; and as such they are multifunctional.

Polyoxometalate Complexes as Precursors to Vanadium‐Doped Molybdenum or Tungsten Oxide Thin Films by Means of Aerosol‐Assisted Chemical Vapour Deposition

“…[23,24] The binding energy range for the Ow as between 530.5 and 533.6 eV,w hichm atches ranges found in the literature. [6,25] There are four Oe nvironments in the substitutedK eggin POMs in comparison with the three for as tandard Keggin POM structure (the extra MÀOe nvironment in which M = vanadium).…”

Novel Chemical Vapour Deposition Routes to Nanocomposite Thin Films

“…The inclusion of either titanium dioxide or cerium dioxide nanoparticles into a vanadium dioxide matrix led to a significant increase in photocatalytic activity relative to a sample of pure vanadium dioxide, this does not appear to correlate strongly with the percentage of nanoparticles incorporated into the film. Photocatalytic activity was comparable to that of a film of anatase titanium dioxide prepared by AACVD (Warwick et al 2010). This suggests that the reactions are limited by the low surface area of the coatings, however, a clear difference between active and inactive coatings can be observed based on initial decolourisation profiles.…”

“…8. Scanning electron microscope images of nanocomposite samples: A) TiO 2 , B) TiO 2 containing 1.8% SnO 2 nanoparticles and C) TiO 2 containing 3.0% SnO 2 nanoparticles (Warwick et al 2010).…”

“…. Far infrared reflectance spectra of titanium dioxide tin dioxide nanocomposites (Warwick et al 2010). …”

“…Photocatalytic titanium dioxide was chosen for the host matrix and tin oxide for the guest nanoparticles. Tin oxide is well known for being infrared reflective and finds use in Low emissivity glazing (Warwick et al 2010). Precursor flasks were prepared with constant amounts of tin dioxide nanoparticles dispersed in methanol and varying levels of TTIP as the titanium precursor and varying levels of tin dioxide nanoparticles dispersed in methanol (Table 1).…”