Effect of TiO2 powder addition on sonochemical destruction of 1,4-dioxane in aqueous systems

Akira Nakajima; Hirokazu Sasaki; Yoshikazu Kameshima; Kiyoshi Okada; Hisashi Harada

doi:10.1016/j.ultsonch.2006.06.001

Effect of TiO₂ powder addition on sonochemical destruction of 1,4-dioxane in aqueous systems

Akira Nakajima, Hirokazu Sasaki, Yoshikazu Kameshima, Kiyoshi Okada, Hisashi Harada

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

14 Citations (Scopus)

Abstract

Effects of TiO₂ powder addition on sonochemical destruction of 1,4-dioxane in water were investigated through comparison of a SiO₂ powder that had similar specific surface area. Results show that addition of TiO₂ is more effective for decomposition of 1,4-dioxane in water than addition of SiO₂. The contribution of photocatalytic destruction through sonoluminescence is not a dominant mechanism for acceleration of sonochemical reactions by adding TiO₂. Sonication of TiO₂-added water generated thermally excited holes in this case. Moreover, intrinsic oxygen vacancies in TiO₂ surface play an important role in achieving high decomposition efficiency by producing cavitation. The addition of reduced TiO₂ powder increases both the ultrasonication energy that is consumed in water and the destruction efficiency of 1,4-dioxane.

Original language	English
Pages (from-to)	197-200
Number of pages	4
Journal	Ultrasonics Sonochemistry
Volume	14
Issue number	2
DOIs	https://doi.org/10.1016/j.ultsonch.2006.06.001
Publication status	Published - Feb 2007
Externally published	Yes

Keywords

Dioxane
Oxygen vacancy
Powder
Sonication
Sonoluminescence
TiO

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Environmental Chemistry
Radiology Nuclear Medicine and imaging
Acoustics and Ultrasonics
Organic Chemistry
Inorganic Chemistry

Access to Document

10.1016/j.ultsonch.2006.06.001

Cite this

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abstract = "Effects of TiO2 powder addition on sonochemical destruction of 1,4-dioxane in water were investigated through comparison of a SiO2 powder that had similar specific surface area. Results show that addition of TiO2 is more effective for decomposition of 1,4-dioxane in water than addition of SiO2. The contribution of photocatalytic destruction through sonoluminescence is not a dominant mechanism for acceleration of sonochemical reactions by adding TiO2. Sonication of TiO2-added water generated thermally excited holes in this case. Moreover, intrinsic oxygen vacancies in TiO2 surface play an important role in achieving high decomposition efficiency by producing cavitation. The addition of reduced TiO2 powder increases both the ultrasonication energy that is consumed in water and the destruction efficiency of 1,4-dioxane.",

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AU - Okada, Kiyoshi

AU - Harada, Hisashi

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