A facile general route for ternary Fe2O3@TiO2@nanometal (Au, Ag) composite as a high-performance and recyclable photocatalyst

Sung Eun Kim; Jae Young Woo; Soo Yeon Kang; Byoung Koun Min; Joong Kee Lee; Sang Wha Lee

doi:10.1016/j.jiec.2016.07.060

A facile general route for ternary Fe₂O₃@TiO₂@nanometal (Au, Ag) composite as a high-performance and recyclable photocatalyst

Sung Eun Kim, Jae Young Woo, Soo Yeon Kang, Byoung Koun Min, Joong Kee Lee, Sang Wha Lee

GREEN SCHOOL (Graduate School of Energy and Environment)

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

23 Citations (Scopus)

Abstract

A modified sol–gel reaction of alkoxy-terminated magnetite (Fe₃O₄) with titanium alkoxide afforded core–shell nanostructure with titania capsule. Ambient-air calcination of core–shell nanostructure resulted in the formation of Fe₂O₃@TiO₂ with photocatalytic activity, the degree of which depended on the calcination temperature (500–800 °C). The Fe₂O₃@TiO₂ (700 °C) with higher oxygen vacancies exhibited enhanced photocatalytic activity than that of Fe₂O₃@TiO₂ (500 °C) with fair magnetism, despite its lower surface area. Au nanometal deposition enhanced the photocatalytic activity of recyclable Fe₂O₃@TiO₂ (500 °C) due to the increased charge separation, whereas Ag nanometal deposition induced the slight increase in the photocatalytic activity of Fe₂O₃@TiO₂@Ag.

Original language	English
Pages (from-to)	142-149
Number of pages	8
Journal	Journal of Industrial and Engineering Chemistry
Volume	43
DOIs	https://doi.org/10.1016/j.jiec.2016.07.060
Publication status	Published - 2016 Nov 25

Keywords

Calcination temperature
FeO@TiO@Au
Photocatalytic activity
Recyclable
Sonochemical deposition
Ternary composite

ASJC Scopus subject areas

Chemical Engineering(all)

Access to Document

10.1016/j.jiec.2016.07.060

Cite this

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title = "A facile general route for ternary Fe2O3@TiO2@nanometal (Au, Ag) composite as a high-performance and recyclable photocatalyst",

abstract = "A modified sol–gel reaction of alkoxy-terminated magnetite (Fe3O4) with titanium alkoxide afforded core–shell nanostructure with titania capsule. Ambient-air calcination of core–shell nanostructure resulted in the formation of Fe2O3@TiO2 with photocatalytic activity, the degree of which depended on the calcination temperature (500–800 °C). The Fe2O3@TiO2 (700 °C) with higher oxygen vacancies exhibited enhanced photocatalytic activity than that of Fe2O3@TiO2 (500 °C) with fair magnetism, despite its lower surface area. Au nanometal deposition enhanced the photocatalytic activity of recyclable Fe2O3@TiO2 (500 °C) due to the increased charge separation, whereas Ag nanometal deposition induced the slight increase in the photocatalytic activity of Fe2O3@TiO2@Ag.",

keywords = "Calcination temperature, FeO@TiO@Au, Photocatalytic activity, Recyclable, Sonochemical deposition, Ternary composite",

author = "Kim, {Sung Eun} and Woo, {Jae Young} and Kang, {Soo Yeon} and Min, {Byoung Koun} and Lee, {Joong Kee} and Lee, {Sang Wha}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) (NRF-2010-C1AAA001-2010-0028958) and KIST flagship program (2E26300). Publisher Copyright: {\textcopyright} 2016 The Korean Society of Industrial and Engineering Chemistry Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

year = "2016",

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doi = "10.1016/j.jiec.2016.07.060",

language = "English",

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pages = "142--149",

journal = "Journal of Industrial and Engineering Chemistry",

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AU - Kim, Sung Eun

AU - Woo, Jae Young

AU - Kang, Soo Yeon

AU - Min, Byoung Koun

AU - Lee, Joong Kee

AU - Lee, Sang Wha

N1 - Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) (NRF-2010-C1AAA001-2010-0028958) and KIST flagship program (2E26300). Publisher Copyright: © 2016 The Korean Society of Industrial and Engineering Chemistry Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2016/11/25

Y1 - 2016/11/25

N2 - A modified sol–gel reaction of alkoxy-terminated magnetite (Fe3O4) with titanium alkoxide afforded core–shell nanostructure with titania capsule. Ambient-air calcination of core–shell nanostructure resulted in the formation of Fe2O3@TiO2 with photocatalytic activity, the degree of which depended on the calcination temperature (500–800 °C). The Fe2O3@TiO2 (700 °C) with higher oxygen vacancies exhibited enhanced photocatalytic activity than that of Fe2O3@TiO2 (500 °C) with fair magnetism, despite its lower surface area. Au nanometal deposition enhanced the photocatalytic activity of recyclable Fe2O3@TiO2 (500 °C) due to the increased charge separation, whereas Ag nanometal deposition induced the slight increase in the photocatalytic activity of Fe2O3@TiO2@Ag.

AB - A modified sol–gel reaction of alkoxy-terminated magnetite (Fe3O4) with titanium alkoxide afforded core–shell nanostructure with titania capsule. Ambient-air calcination of core–shell nanostructure resulted in the formation of Fe2O3@TiO2 with photocatalytic activity, the degree of which depended on the calcination temperature (500–800 °C). The Fe2O3@TiO2 (700 °C) with higher oxygen vacancies exhibited enhanced photocatalytic activity than that of Fe2O3@TiO2 (500 °C) with fair magnetism, despite its lower surface area. Au nanometal deposition enhanced the photocatalytic activity of recyclable Fe2O3@TiO2 (500 °C) due to the increased charge separation, whereas Ag nanometal deposition induced the slight increase in the photocatalytic activity of Fe2O3@TiO2@Ag.

KW - Calcination temperature

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KW - Recyclable

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KW - Ternary composite

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