Microstructure, Optical and Photocatalytic Properties of TiO2 Thin Films Prepared by Chelating-Agent Assisted Sol-Gel Method

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F16%3A86090654" target="_blank" >RIV/61989100:27710/16:86090654 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/16:10322272

Result on the web

<a href="http://doi:10.1166/jnn.2016.10684" target="_blank" >http://doi:10.1166/jnn.2016.10684</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1166/jnn.2016.10684" target="_blank" >10.1166/jnn.2016.10684</a>

Result language

angličtina

Original language name

Microstructure, Optical and Photocatalytic Properties of TiO2 Thin Films Prepared by Chelating-Agent Assisted Sol-Gel Method

Original language description

Single and multilayer TiO2 thin films coated on two types of soda-lime glass substrates (microscope slides and cylinders) were prepared by a chelating agent-assisted sol-gel method, using ethyl acetoacetate as a chelating agent, dip-coating and calcination at 500oC for 2 h in air. Phase composition, microstructural, morphological and optical properties of thin films were comprehensively investigated by using XRF, advanced XRD analysis, Raman and UV-vis spectroscopy and AFM. It was found out that the thickness of thin films increases linearly with increasing number of deposited layers, indicating a good adhesion of the titania solution to a glass substrate as well as to a previously calcined layer. 1 layer film crystallized to antase-TiO2(B) mixture with minor/negligible amount of nanosized brookite, 2-4 layers films crystallized to anatase-brookite-TiO2(B) mixture. In contrast to other multilayers films, 4 layers film was highly inhomogeneous. The different phase composition of thin films was clarified based on the crystallization via titanate/s and metastable monoclinic TiO2(B) as a consequence of several phenomena; the diffusion of Na+ ions from a soda-lime glass substrate, acidic conditions and repeated thermal treatment. The multilayer films were in average highly transparent (80-95%) in the visible light region with the sharp absorption edge in the UV light region. Additionally, the photocatalytic properties of selected multilayer films were compared in AO7 photodegradation. Photocatalytic experiments showed that thicker 4 layers film of tricrystalline anatase-brookite-TiO2(B) phase mixture was similarly active as thinner 3 layers film of similar phase composition, which may be a consequence of the inhomogeneity of the thicker film.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of nanoscience and nanotechnology

ISSN

1533-4880

e-ISSN

—

Volume of the periodical

16

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

504-514

UT code for WoS article

000369680400051

EID of the result in the Scopus database

2-s2.0-84959337836