Sol-gel SiO2/TiO2 bilayer films with self-cleaning and antireflection properties

Zhaoyue Liu; Xintong Zhang; Taketoshi Murakami; Akira Fujishima

doi:10.1016/j.solmat.2008.06.005

Sol-gel SiO₂/TiO₂ bilayer films with self-cleaning and antireflection properties

Zhaoyue Liu
, Xintong Zhang
, Taketoshi Murakami
, Akira Fujishima^*

^*Corresponding author for this work

Kanagawa Institute of Industrial Science and Technology

Research output: Contribution to journal › Article › peer-review

203 Scopus citations

Abstract

We report here that a facile sol-gel dip-coating technique can be used to fabricate a SiO₂/TiO₂ bilayer film with self-cleaning and antireflection properties. The bottom SiO₂ layer acts as an antireflection coating due to its lower refractive index; the top TiO₂ layer acts as a self-cleaning coating generated from its photocatalysis and photo-induced superhydrophilicity. The maximal transmittance of SiO₂/TiO₂ bilayer film at normally incident light can be reached 96.7%, independent of the high refractive index and coverage of TiO₂ nanoparticles. However, the photocatalytic activity of the bilayer film shows a close dependence on coverage of TiO₂ nanoparticles. After illuminated by ultraviolet light, the SiO₂/TiO₂ bilayer films are superhydrophilic with water contact angle less than 2°, which favors greatly the self-cleaning function of the films.

Original language	English
Pages (from-to)	1434-1438
Number of pages	5
Journal	Solar Energy Materials and Solar Cells
Volume	92
Issue number	11
DOIs	https://doi.org/10.1016/j.solmat.2008.06.005
State	Published - Nov 2008
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Antireflection
Dip-coating
Self-cleaning
SiO/TiO
Sol-gel

Access to Document

10.1016/j.solmat.2008.06.005

Cite this

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title = "Sol-gel SiO2/TiO2 bilayer films with self-cleaning and antireflection properties",

abstract = "We report here that a facile sol-gel dip-coating technique can be used to fabricate a SiO2/TiO2 bilayer film with self-cleaning and antireflection properties. The bottom SiO2 layer acts as an antireflection coating due to its lower refractive index; the top TiO2 layer acts as a self-cleaning coating generated from its photocatalysis and photo-induced superhydrophilicity. The maximal transmittance of SiO2/TiO2 bilayer film at normally incident light can be reached 96.7\%, independent of the high refractive index and coverage of TiO2 nanoparticles. However, the photocatalytic activity of the bilayer film shows a close dependence on coverage of TiO2 nanoparticles. After illuminated by ultraviolet light, the SiO2/TiO2 bilayer films are superhydrophilic with water contact angle less than 2°, which favors greatly the self-cleaning function of the films.",

keywords = "Antireflection, Dip-coating, Self-cleaning, SiO/TiO, Sol-gel",

author = "Zhaoyue Liu and Xintong Zhang and Taketoshi Murakami and Akira Fujishima",

year = "2008",

month = nov,

doi = "10.1016/j.solmat.2008.06.005",

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pages = "1434--1438",

journal = "Solar Energy Materials and Solar Cells",

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TY - JOUR

T1 - Sol-gel SiO2/TiO2 bilayer films with self-cleaning and antireflection properties

AU - Liu, Zhaoyue

AU - Zhang, Xintong

AU - Murakami, Taketoshi

AU - Fujishima, Akira

PY - 2008/11

Y1 - 2008/11

N2 - We report here that a facile sol-gel dip-coating technique can be used to fabricate a SiO2/TiO2 bilayer film with self-cleaning and antireflection properties. The bottom SiO2 layer acts as an antireflection coating due to its lower refractive index; the top TiO2 layer acts as a self-cleaning coating generated from its photocatalysis and photo-induced superhydrophilicity. The maximal transmittance of SiO2/TiO2 bilayer film at normally incident light can be reached 96.7%, independent of the high refractive index and coverage of TiO2 nanoparticles. However, the photocatalytic activity of the bilayer film shows a close dependence on coverage of TiO2 nanoparticles. After illuminated by ultraviolet light, the SiO2/TiO2 bilayer films are superhydrophilic with water contact angle less than 2°, which favors greatly the self-cleaning function of the films.

AB - We report here that a facile sol-gel dip-coating technique can be used to fabricate a SiO2/TiO2 bilayer film with self-cleaning and antireflection properties. The bottom SiO2 layer acts as an antireflection coating due to its lower refractive index; the top TiO2 layer acts as a self-cleaning coating generated from its photocatalysis and photo-induced superhydrophilicity. The maximal transmittance of SiO2/TiO2 bilayer film at normally incident light can be reached 96.7%, independent of the high refractive index and coverage of TiO2 nanoparticles. However, the photocatalytic activity of the bilayer film shows a close dependence on coverage of TiO2 nanoparticles. After illuminated by ultraviolet light, the SiO2/TiO2 bilayer films are superhydrophilic with water contact angle less than 2°, which favors greatly the self-cleaning function of the films.

KW - Antireflection

KW - Dip-coating

KW - Self-cleaning

KW - SiO/TiO

KW - Sol-gel

UR - https://www.scopus.com/pages/publications/50249124764

U2 - 10.1016/j.solmat.2008.06.005

DO - 10.1016/j.solmat.2008.06.005

M3 - 文章

AN - SCOPUS:50249124764

SN - 0927-0248

VL - 92

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EP - 1438

JO - Solar Energy Materials and Solar Cells

JF - Solar Energy Materials and Solar Cells

IS - 11

ER -