Effects of hydrothermal temperature and acid concentration on the transition from titanate to titania

Soonhyun Kim; Minsun Kim; Sung Ho Hwang; Sang Kyoo Lim

doi:10.1016/j.jiec.2012.01.015

Effects of hydrothermal temperature and acid concentration on the transition from titanate to titania

Soonhyun Kim, Minsun Kim, Sung Ho Hwang, Sang Kyoo Lim

Division of Energy Techonology

Daegu Gyeongbuk Institute of Science and Technology

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

14 Scopus citations

Abstract

Nanostructured titanates were prepared by alkaline hydrothermal processing. The titanates were transformed to the anatase particles at low concentrations of acid, whereas the rutile rods were produced from the titanates at high concentrations of acid. These changes were more retarded in the titanate nanofiber product than in titanate nanotubes product, which could be attributed to the stability and high crystallinity of the titanate nanofiber product prepared at a high hydrothermal temperature. The photocatalytic activities of the acid treated nanostructured titanates for MB degradation and gaseous CH ₃CHO oxidation were strongly dependent on the presence of the anatase crystalline phase.

Original language	English
Pages (from-to)	1141-1148
Number of pages	8
Journal	Journal of Industrial and Engineering Chemistry
Volume	18
Issue number	3
DOIs	https://doi.org/10.1016/j.jiec.2012.01.015
State	Published - 25 May 2012

Bibliographical note

Funding Information:
This work was supported by the DGIST R&D Program of the Ministry of Education, Science and Technology of Korea ( 11-NB-03 ). It was also supported by the technology innovation program of the Ministry of Knowledge Economy of Korea (Industrial strategic technology development program, No 10034046).

Keywords

Hydrothermal
Nanostructure
Phase transformation
Photocatalytic
Titanates
Titania

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10.1016/j.jiec.2012.01.015

Cite this

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title = "Effects of hydrothermal temperature and acid concentration on the transition from titanate to titania",

abstract = "Nanostructured titanates were prepared by alkaline hydrothermal processing. The titanates were transformed to the anatase particles at low concentrations of acid, whereas the rutile rods were produced from the titanates at high concentrations of acid. These changes were more retarded in the titanate nanofiber product than in titanate nanotubes product, which could be attributed to the stability and high crystallinity of the titanate nanofiber product prepared at a high hydrothermal temperature. The photocatalytic activities of the acid treated nanostructured titanates for MB degradation and gaseous CH 3CHO oxidation were strongly dependent on the presence of the anatase crystalline phase.",

keywords = "Hydrothermal, Nanostructure, Phase transformation, Photocatalytic, Titanates, Titania",

author = "Soonhyun Kim and Minsun Kim and Hwang, {Sung Ho} and Lim, {Sang Kyoo}",

note = "Funding Information: This work was supported by the DGIST R&D Program of the Ministry of Education, Science and Technology of Korea ( 11-NB-03 ). It was also supported by the technology innovation program of the Ministry of Knowledge Economy of Korea (Industrial strategic technology development program, No 10034046).",

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AU - Kim, Minsun

AU - Hwang, Sung Ho

AU - Lim, Sang Kyoo

N1 - Funding Information: This work was supported by the DGIST R&D Program of the Ministry of Education, Science and Technology of Korea ( 11-NB-03 ). It was also supported by the technology innovation program of the Ministry of Knowledge Economy of Korea (Industrial strategic technology development program, No 10034046).

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N2 - Nanostructured titanates were prepared by alkaline hydrothermal processing. The titanates were transformed to the anatase particles at low concentrations of acid, whereas the rutile rods were produced from the titanates at high concentrations of acid. These changes were more retarded in the titanate nanofiber product than in titanate nanotubes product, which could be attributed to the stability and high crystallinity of the titanate nanofiber product prepared at a high hydrothermal temperature. The photocatalytic activities of the acid treated nanostructured titanates for MB degradation and gaseous CH 3CHO oxidation were strongly dependent on the presence of the anatase crystalline phase.

AB - Nanostructured titanates were prepared by alkaline hydrothermal processing. The titanates were transformed to the anatase particles at low concentrations of acid, whereas the rutile rods were produced from the titanates at high concentrations of acid. These changes were more retarded in the titanate nanofiber product than in titanate nanotubes product, which could be attributed to the stability and high crystallinity of the titanate nanofiber product prepared at a high hydrothermal temperature. The photocatalytic activities of the acid treated nanostructured titanates for MB degradation and gaseous CH 3CHO oxidation were strongly dependent on the presence of the anatase crystalline phase.

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KW - Nanostructure

KW - Phase transformation

KW - Photocatalytic

KW - Titanates

KW - Titania

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JO - Journal of Industrial and Engineering Chemistry

JF - Journal of Industrial and Engineering Chemistry

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ER -

Effects of hydrothermal temperature and acid concentration on the transition from titanate to titania

Abstract

Bibliographical note

Keywords

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