Photocatalytic thin films containing TiO2 nanoparticles by the layer-by-layer self-assembling method
2002; Elsevier BV; Volume: 201; Issue: 1-4 Linguagem: Inglês
10.1016/s0169-4332(02)00612-8
ISSN1873-5584
AutoresTaehyun Kim, Byeong‐Hyeok Sohn,
Tópico(s)Advanced Photocatalysis Techniques
ResumoPhotocatalytic thin films consisting of ionic polymers and positively charged TiO2 nanoparticles were fabricated by the layer-by-layer self-assembling (LBL-SA) method, i.e. successive ionic adsorption from their aqueous solutions. Regular increases of the film thickness and the film weight by each deposition were characterized using ellipsometry, UV–Vis spectroscopy, and a quartz crystal microbalance (QCM). Uniformly distributed TiO2 nanoparticles in the thin film were also observed in scanning and transmission electron microscopic images. Photocatalytic properties of the LBL-SA thin film containing TiO2 nanoparticles were confirmed by oxidation of iodide and decomposition of methyl orange. These results indicate a controllable LBL-SA process to immobilize photocatalytic TiO2 nanoparticles in thin films.
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