Double-Layered TiO2−SiO2 Nanostructured Films with Self-Cleaning and Antireflective Properties

Xintong Zhang; Akira Fujishima; Ming Jin; Alexei V. Emeline; Taketoshi Murakami

doi:10.1021/jp064442u

Abstract

Dual function of self-cleaning and antireflection can be created in double-layered TiO2-SiO2 nanostructured films. The film were prepared by (1) layer-by-layer deposition of multilayered SiO2 nanoparticles with polydiallyldimethylammonium (PDDA) cations, (2) layer-by-layer deposition of multilayered titanate nanosheets with polications on PDDA/SiO2 multilayer films, and (3) burning out the polymer and converting titanate nanosheets into TiO2 by hearing at 500 degrees C. The as-prepared films, consisting of a porous SiO2 bottom layer and a dense TiO2 top layer, improved the transmittance of glass or quartz substrates, as demonstrated by transmission spectra collected at normal incidence. The photocatalytic properties of the films were studied by the change of the water contact angle together with the decay of the IR absorption of the hydrocarbon chain of octadecylphosphonic-acid-modified films under 2.6 mW cm-2 UV illumination. Both the antireflective and the photocatalytic properties of the films were dependent on the number of PDDA/nanosheet bilayers deposited. however, excellent surface wettability of the films for water was obtained, independent of the preparation conditions. The experimental findings are discussed in terms of the special structure of the double-layered nanostructured film.

Keywords

Materials scienceAnti-reflective coatingChemical engineeringLayer (electronics)Contact angleWettingLayer by layerThin filmTitanateAdsorptionPhotocatalysisNanotechnologyComposite materialCeramicOrganic chemistryChemistry

MeSH Terms

CatalysisCationsMembranesArtificialNanostructuresParticle SizePhotochemistryPolyethylenesQuaternary Ammonium CompoundsSilicon DioxideSurface PropertiesTitanium

Affiliated Institutions

Kanagawa Academy of Science and Technology JP

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Publication Info

Year: 2006
Type: article
Volume: 110
Issue: 50
Pages: 25142-25148
Citations: 174
Access: Closed

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APA Style

                            
                                
                                    Xintong Zhang, 
                                
                                    Akira Fujishima, 
                                
                                    Ming Jin
                                
                                et al.
                            
                            (2006). 
                            Double-Layered TiO<sub>2</sub>−SiO<sub>2</sub> Nanostructured Films with Self-Cleaning and Antireflective Properties. 
                            The Journal of Physical Chemistry B
                            , 110
                            (50)
                            , 25142-25148.
                            https://doi.org/10.1021/jp064442u
                        

Identifiers

DOI: 10.1021/jp064442u
PMID: 17201053

Data Quality

Data completeness: 81%

Double-Layered TiO<sub>2</sub>−SiO<sub>2</sub> Nanostructured Films with Self-Cleaning and Antireflective Properties