Nanoporous TiO 2/SiO 2 prepared by atomic layer deposition as adsorbents of methylene blue in aqueous solutions

Hyun Ook Seo; Chae Won Sim; Kwang Dae Kim; Young Dok Kim; Dong Chan Lim

doi:10.1016/j.cej.2012.01.022

Nanoporous TiO ₂/SiO ₂ prepared by atomic layer deposition as adsorbents of methylene blue in aqueous solutions

Hyun Ook Seo
, Chae Won Sim
, Kwang Dae Kim
, Young Dok Kim
, Dong Chan Lim

Department of Chemistry

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

40 Scopus citations

Abstract

TiO ₂ films supported by porous SiO ₂ with high surface area were synthesized by atomic layer deposition (ALD). Porous structure of SiO ₂ could be maintained even after deposition of TiO ₂ using 500 ALD cycles. All the TiO ₂-covered SiO ₂ samples showed comparable methylene blue (MB) adsorption abilities to that of bare ones. Moreover, MB adsorption capability of TiO ₂/SiO ₂ was almost fully recovered by simple re-annealing process, whereas MB adsorption capacity of bare SiO ₂ was not fully recovered by the same treatment. FT-IR study demonstrated that thermal decomposition of adsorbed MB molecules was much facilitated in the presence of TiO ₂ films, hence preventing deposition of surface-bound species created on the adsorbents surface during the thermal treatment process. Photocatalytic activity of TiO ₂/SiO ₂ samples was also investigated as a function of TiO ₂ film thickness, and the result will be discussed.

Original language	English
Pages (from-to)	381-386
Number of pages	6
Journal	Chemical Engineering Journal
Volume	183
DOIs	https://doi.org/10.1016/j.cej.2012.01.022
State	Published - 15 Feb 2012

Keywords

Dye
Reused
SiO
TiO
Water treatment

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10.1016/j.cej.2012.01.022

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@article{63724017e4764d389ed36356ed8a825b,

title = "Nanoporous TiO 2/SiO 2 prepared by atomic layer deposition as adsorbents of methylene blue in aqueous solutions",

abstract = "TiO 2 films supported by porous SiO 2 with high surface area were synthesized by atomic layer deposition (ALD). Porous structure of SiO 2 could be maintained even after deposition of TiO 2 using 500 ALD cycles. All the TiO 2-covered SiO 2 samples showed comparable methylene blue (MB) adsorption abilities to that of bare ones. Moreover, MB adsorption capability of TiO 2/SiO 2 was almost fully recovered by simple re-annealing process, whereas MB adsorption capacity of bare SiO 2 was not fully recovered by the same treatment. FT-IR study demonstrated that thermal decomposition of adsorbed MB molecules was much facilitated in the presence of TiO 2 films, hence preventing deposition of surface-bound species created on the adsorbents surface during the thermal treatment process. Photocatalytic activity of TiO 2/SiO 2 samples was also investigated as a function of TiO 2 film thickness, and the result will be discussed.",

keywords = "Dye, Reused, SiO, TiO, Water treatment",

author = "Seo, \{Hyun Ook\} and Sim, \{Chae Won\} and Kim, \{Kwang Dae\} and Kim, \{Young Dok\} and Lim, \{Dong Chan\}",

year = "2012",

month = feb,

day = "15",

doi = "10.1016/j.cej.2012.01.022",

language = "English",

volume = "183",

pages = "381--386",

journal = "Chemical Engineering Journal",

issn = "1385-8947",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Nanoporous TiO 2/SiO 2 prepared by atomic layer deposition as adsorbents of methylene blue in aqueous solutions

AU - Seo, Hyun Ook

AU - Sim, Chae Won

AU - Kim, Kwang Dae

AU - Kim, Young Dok

AU - Lim, Dong Chan

PY - 2012/2/15

Y1 - 2012/2/15

N2 - TiO 2 films supported by porous SiO 2 with high surface area were synthesized by atomic layer deposition (ALD). Porous structure of SiO 2 could be maintained even after deposition of TiO 2 using 500 ALD cycles. All the TiO 2-covered SiO 2 samples showed comparable methylene blue (MB) adsorption abilities to that of bare ones. Moreover, MB adsorption capability of TiO 2/SiO 2 was almost fully recovered by simple re-annealing process, whereas MB adsorption capacity of bare SiO 2 was not fully recovered by the same treatment. FT-IR study demonstrated that thermal decomposition of adsorbed MB molecules was much facilitated in the presence of TiO 2 films, hence preventing deposition of surface-bound species created on the adsorbents surface during the thermal treatment process. Photocatalytic activity of TiO 2/SiO 2 samples was also investigated as a function of TiO 2 film thickness, and the result will be discussed.

AB - TiO 2 films supported by porous SiO 2 with high surface area were synthesized by atomic layer deposition (ALD). Porous structure of SiO 2 could be maintained even after deposition of TiO 2 using 500 ALD cycles. All the TiO 2-covered SiO 2 samples showed comparable methylene blue (MB) adsorption abilities to that of bare ones. Moreover, MB adsorption capability of TiO 2/SiO 2 was almost fully recovered by simple re-annealing process, whereas MB adsorption capacity of bare SiO 2 was not fully recovered by the same treatment. FT-IR study demonstrated that thermal decomposition of adsorbed MB molecules was much facilitated in the presence of TiO 2 films, hence preventing deposition of surface-bound species created on the adsorbents surface during the thermal treatment process. Photocatalytic activity of TiO 2/SiO 2 samples was also investigated as a function of TiO 2 film thickness, and the result will be discussed.

KW - Dye

KW - Reused

KW - SiO

KW - TiO

KW - Water treatment

UR - https://www.scopus.com/pages/publications/84862826838

U2 - 10.1016/j.cej.2012.01.022

DO - 10.1016/j.cej.2012.01.022

M3 - Article

AN - SCOPUS:84862826838

SN - 1385-8947

VL - 183

SP - 381

EP - 386

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

Nanoporous TiO ₂/SiO ₂ prepared by atomic layer deposition as adsorbents of methylene blue in aqueous solutions

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Keywords

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