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

^*Corresponding author for this work

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

29 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

Bibliographical 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:
© 2016 The Korean Society of Industrial and Engineering Chemistry

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

Keywords

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

ASJC Scopus subject areas

General Chemical Engineering

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.",

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

language = "English",

volume = "43",

pages = "142--149",

journal = "Journal of Industrial and Engineering Chemistry",

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publisher = "Korean Society of Industrial Engineering Chemistry",

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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

KW - FeO@TiO@Au

KW - Photocatalytic activity

KW - Recyclable

KW - Sonochemical deposition

KW - Ternary composite

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