Influence of alkoxide structures on formation of TiO2/WO3 heterojunctions for photocatalytic decomposition of organic compounds

Taeseok Choi; Jung Sik Kim; Jung Hyeun Kim

doi:10.1016/j.apt.2016.07.016

Influence of alkoxide structures on formation of TiO₂/WO₃ heterojunctions for photocatalytic decomposition of organic compounds

Taeseok Choi, Jung Sik Kim, Jung Hyeun Kim

University of Seoul

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

10 Scopus citations

Abstract

Reducing recombination and lowering band gap can be achieved with heterostructured photocatalysts, and the TiO₂ photocatalyst film coupled with WO₃ component maintains its advantageous characteristics. In order to investigate the effect of molecular structures on heterojunction formation, the three types of TiO₂ precursors were used to make TiO₂/WO₃ heterojunction. The TiO₂/WO₃ composite films with high transmittance were successfully fabricated by the sol–gel spin coating method. Formation of Ti–O–W linkage was preferable from the precursor with small steric hindrance, and it was confirmed with the well scattered WO₃ components in TiO₂ crystal matrix and also with reduced TiO₂ crystal size. High portion of Ti–O–W bond resulted in the most effective photocatalytic activity. Therefore, it is important to use a proper precursor to improve photodecomposition efficiency in manufacturing the heterostructured photocatalysts.

Original language	English
Pages (from-to)	2061-2065
Number of pages	5
Journal	Advanced Powder Technology
Volume	27
Issue number	5
DOIs	https://doi.org/10.1016/j.apt.2016.07.016
State	Published - 1 Sep 2016

Keywords

Heterostructured
Photocatalyst
Precursor structure
Steric hindrance
TiO/WO

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title = "Influence of alkoxide structures on formation of TiO2/WO3 heterojunctions for photocatalytic decomposition of organic compounds",

abstract = "Reducing recombination and lowering band gap can be achieved with heterostructured photocatalysts, and the TiO2 photocatalyst film coupled with WO3 component maintains its advantageous characteristics. In order to investigate the effect of molecular structures on heterojunction formation, the three types of TiO2 precursors were used to make TiO2/WO3 heterojunction. The TiO2/WO3 composite films with high transmittance were successfully fabricated by the sol–gel spin coating method. Formation of Ti–O–W linkage was preferable from the precursor with small steric hindrance, and it was confirmed with the well scattered WO3 components in TiO2 crystal matrix and also with reduced TiO2 crystal size. High portion of Ti–O–W bond resulted in the most effective photocatalytic activity. Therefore, it is important to use a proper precursor to improve photodecomposition efficiency in manufacturing the heterostructured photocatalysts.",

keywords = "Heterostructured, Photocatalyst, Precursor structure, Steric hindrance, TiO/WO",

author = "Taeseok Choi and Kim, {Jung Sik} and Kim, {Jung Hyeun}",

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year = "2016",

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T1 - Influence of alkoxide structures on formation of TiO2/WO3 heterojunctions for photocatalytic decomposition of organic compounds

AU - Choi, Taeseok

AU - Kim, Jung Sik

AU - Kim, Jung Hyeun

PY - 2016/9/1

Y1 - 2016/9/1

N2 - Reducing recombination and lowering band gap can be achieved with heterostructured photocatalysts, and the TiO2 photocatalyst film coupled with WO3 component maintains its advantageous characteristics. In order to investigate the effect of molecular structures on heterojunction formation, the three types of TiO2 precursors were used to make TiO2/WO3 heterojunction. The TiO2/WO3 composite films with high transmittance were successfully fabricated by the sol–gel spin coating method. Formation of Ti–O–W linkage was preferable from the precursor with small steric hindrance, and it was confirmed with the well scattered WO3 components in TiO2 crystal matrix and also with reduced TiO2 crystal size. High portion of Ti–O–W bond resulted in the most effective photocatalytic activity. Therefore, it is important to use a proper precursor to improve photodecomposition efficiency in manufacturing the heterostructured photocatalysts.

AB - Reducing recombination and lowering band gap can be achieved with heterostructured photocatalysts, and the TiO2 photocatalyst film coupled with WO3 component maintains its advantageous characteristics. In order to investigate the effect of molecular structures on heterojunction formation, the three types of TiO2 precursors were used to make TiO2/WO3 heterojunction. The TiO2/WO3 composite films with high transmittance were successfully fabricated by the sol–gel spin coating method. Formation of Ti–O–W linkage was preferable from the precursor with small steric hindrance, and it was confirmed with the well scattered WO3 components in TiO2 crystal matrix and also with reduced TiO2 crystal size. High portion of Ti–O–W bond resulted in the most effective photocatalytic activity. Therefore, it is important to use a proper precursor to improve photodecomposition efficiency in manufacturing the heterostructured photocatalysts.

KW - Heterostructured

KW - Photocatalyst

KW - Precursor structure

KW - Steric hindrance

KW - TiO/WO

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IS - 5

ER -

Influence of alkoxide structures on formation of TiO₂/WO₃ heterojunctions for photocatalytic decomposition of organic compounds

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Keywords

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