ZnO shell on mesoporous silica by atomic layer deposition: Removal of organic dye in water by an adsorbent and its photocatalytic regeneration

Bora Jeong; Dae Han Kim; Eun Ji Park; Myung Geun Jeong; Kwang Dae Kim; Hyun Ook Seo; Young Dok Kim; Sunghyun Uhm

doi:10.1016/j.apsusc.2014.04.060

ZnO shell on mesoporous silica by atomic layer deposition: Removal of organic dye in water by an adsorbent and its photocatalytic regeneration

Bora Jeong
, Dae Han Kim
, Eun Ji Park
, Myung Geun Jeong
, Kwang Dae Kim
, Hyun Ook Seo
, Young Dok Kim
, Sunghyun Uhm

Department of Chemistry

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

43 Scopus citations

Abstract

We fabricated a ZnO shell on mesoporous SiO ₂ (ZnO/SiO ₂ ) particles with diameters of 250-500 μm using atomic layer deposition. This structure showed a higher adsorption capacity for methylene blue than bare mesoporous SiO ₂ . Moreover, the ZnO/SiO ₂ saturated by methylene blue could be easily separated from the aqueous solution and regenerated upon UV exposure by the photocatalytic activity of ZnO for decomposing adsorbed methylene blue. This system can be used for efficiently removing organic pollutants from water by adsorption under dark conditions and photocatalytic regeneration, i.e., organic pollutants in water can steadily be removed under alternating dark-light conditions.

Original language	English
Pages (from-to)	468-474
Number of pages	7
Journal	Applied Surface Science
Volume	307
DOIs	https://doi.org/10.1016/j.apsusc.2014.04.060
State	Published - 15 Jul 2014

Keywords

Adsorption
Mesoporous silica
Photocatalysis
ZnO

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10.1016/j.apsusc.2014.04.060

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title = "ZnO shell on mesoporous silica by atomic layer deposition: Removal of organic dye in water by an adsorbent and its photocatalytic regeneration",

abstract = " We fabricated a ZnO shell on mesoporous SiO 2 (ZnO/SiO 2 ) particles with diameters of 250-500 μm using atomic layer deposition. This structure showed a higher adsorption capacity for methylene blue than bare mesoporous SiO 2 . Moreover, the ZnO/SiO 2 saturated by methylene blue could be easily separated from the aqueous solution and regenerated upon UV exposure by the photocatalytic activity of ZnO for decomposing adsorbed methylene blue. This system can be used for efficiently removing organic pollutants from water by adsorption under dark conditions and photocatalytic regeneration, i.e., organic pollutants in water can steadily be removed under alternating dark-light conditions.",

keywords = "Adsorption, Mesoporous silica, Photocatalysis, ZnO",

author = "Bora Jeong and Kim, \{Dae Han\} and Park, \{Eun Ji\} and Jeong, \{Myung Geun\} and Kim, \{Kwang Dae\} and Seo, \{Hyun Ook\} and Kim, \{Young Dok\} and Sunghyun Uhm",

year = "2014",

month = jul,

day = "15",

doi = "10.1016/j.apsusc.2014.04.060",

language = "English",

volume = "307",

pages = "468--474",

journal = "Applied Surface Science",

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TY - JOUR

T1 - ZnO shell on mesoporous silica by atomic layer deposition

T2 - Removal of organic dye in water by an adsorbent and its photocatalytic regeneration

AU - Jeong, Bora

AU - Kim, Dae Han

AU - Park, Eun Ji

AU - Jeong, Myung Geun

AU - Kim, Kwang Dae

AU - Seo, Hyun Ook

AU - Kim, Young Dok

AU - Uhm, Sunghyun

PY - 2014/7/15

Y1 - 2014/7/15

N2 - We fabricated a ZnO shell on mesoporous SiO 2 (ZnO/SiO 2 ) particles with diameters of 250-500 μm using atomic layer deposition. This structure showed a higher adsorption capacity for methylene blue than bare mesoporous SiO 2 . Moreover, the ZnO/SiO 2 saturated by methylene blue could be easily separated from the aqueous solution and regenerated upon UV exposure by the photocatalytic activity of ZnO for decomposing adsorbed methylene blue. This system can be used for efficiently removing organic pollutants from water by adsorption under dark conditions and photocatalytic regeneration, i.e., organic pollutants in water can steadily be removed under alternating dark-light conditions.

AB - We fabricated a ZnO shell on mesoporous SiO 2 (ZnO/SiO 2 ) particles with diameters of 250-500 μm using atomic layer deposition. This structure showed a higher adsorption capacity for methylene blue than bare mesoporous SiO 2 . Moreover, the ZnO/SiO 2 saturated by methylene blue could be easily separated from the aqueous solution and regenerated upon UV exposure by the photocatalytic activity of ZnO for decomposing adsorbed methylene blue. This system can be used for efficiently removing organic pollutants from water by adsorption under dark conditions and photocatalytic regeneration, i.e., organic pollutants in water can steadily be removed under alternating dark-light conditions.

KW - Adsorption

KW - Mesoporous silica

KW - Photocatalysis

KW - ZnO

UR - https://www.scopus.com/pages/publications/84901310556

U2 - 10.1016/j.apsusc.2014.04.060

DO - 10.1016/j.apsusc.2014.04.060

M3 - Article

AN - SCOPUS:84901310556

SN - 0169-4332

VL - 307

SP - 468

EP - 474

JO - Applied Surface Science

JF - Applied Surface Science

ER -

ZnO shell on mesoporous silica by atomic layer deposition: Removal of organic dye in water by an adsorbent and its photocatalytic regeneration

Abstract

Keywords

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