Evaluation of the O3/graphene-based materials catalytic process: pH effect and iopromide removal

Y. Yoon; H. Oh; Y. T. Ahn; M. Kwon; Y. Jung; W. K. Park; T. M. Hwang; W. S. Yang; J. W. Kang

doi:10.1016/j.cattod.2016.03.014

Evaluation of the O₃/graphene-based materials catalytic process: pH effect and iopromide removal

Y. Yoon, H. Oh, Y. T. Ahn, M. Kwon, Y. Jung, W. K. Park, T. M. Hwang, W. S. Yang, J. W. Kang

Division of Environmental Engineering

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

26 Citations (Scopus)

Abstract

Graphene-based materials, including graphene oxide (GO), reduced-graphene oxide (rGO), and non-oxidative graphene (nOG) were evaluated for catalytic ozonation in water solutions. Among the graphene-based materials evaluated for catalytic ozonation, it was confirmed that rGO was unsuitable to apply to the ozone (O₃)/graphene-based materials catalytic process because the high electron mobility of rGO prevented the transformation of O₃ into hydroxyl radicals ([rad]OH). On the other hand, GO, which had sufficient oxygenated functional groups on the surface, decomposed and generated the most amount of O₃ and [rad]OH, respectively. Although O₃/nOG process produced a lower amount of [rad]OH than O₃/GO process, nOG was more effective than GO for the transformation yields of O₃ into [rad]OH. Furthermore, nOG could generate [rad]OH not only in the bulk phase, but also on the surface of nOG during catalytic ozonation. However, iopromide (IPM) was effectively removed during O₃/GO process due to the more [rad]OH generated in the bulk phase than O₃/nOG process.

Original language	English
Pages (from-to)	77-85
Number of pages	9
Journal	Catalysis Today
Volume	282
DOIs	https://doi.org/10.1016/j.cattod.2016.03.014
Publication status	Published - 2017 Mar 15

Bibliographical note

Funding Information:
This research was supported by a grant from the Advanced Technology Center R&D Program funded by the Ministry of Trade, Industry & Energy of Korea ( 10048475 ), by the Korea government Ministry of Knowledge Economy , the Technology Innovation Program (No. 10044410 , commercialization of flexible touch panels based on 900 × 1600 mm 2 large, less than 1-nm thick graphene film synthesis technique, and by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) ( 2013R1A2A2A05006466 ).

Publisher Copyright:
© 2016 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)

Access to Document

10.1016/j.cattod.2016.03.014

Cite this

@article{b1b13b64c137445ca3c814ddbfe88e91,

title = "Evaluation of the O3/graphene-based materials catalytic process: pH effect and iopromide removal",

abstract = "Graphene-based materials, including graphene oxide (GO), reduced-graphene oxide (rGO), and non-oxidative graphene (nOG) were evaluated for catalytic ozonation in water solutions. Among the graphene-based materials evaluated for catalytic ozonation, it was confirmed that rGO was unsuitable to apply to the ozone (O3)/graphene-based materials catalytic process because the high electron mobility of rGO prevented the transformation of O3 into hydroxyl radicals ([rad]OH). On the other hand, GO, which had sufficient oxygenated functional groups on the surface, decomposed and generated the most amount of O3 and [rad]OH, respectively. Although O3/nOG process produced a lower amount of [rad]OH than O3/GO process, nOG was more effective than GO for the transformation yields of O3 into [rad]OH. Furthermore, nOG could generate [rad]OH not only in the bulk phase, but also on the surface of nOG during catalytic ozonation. However, iopromide (IPM) was effectively removed during O3/GO process due to the more [rad]OH generated in the bulk phase than O3/nOG process.",

author = "Y. Yoon and H. Oh and Ahn, {Y. T.} and M. Kwon and Y. Jung and Park, {W. K.} and Hwang, {T. M.} and Yang, {W. S.} and Kang, {J. W.}",

note = "Funding Information: This research was supported by a grant from the Advanced Technology Center R&D Program funded by the Ministry of Trade, Industry & Energy of Korea ( 10048475 ), by the Korea government Ministry of Knowledge Economy , the Technology Innovation Program (No. 10044410 , commercialization of flexible touch panels based on 900 × 1600 mm 2 large, less than 1-nm thick graphene film synthesis technique, and by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) ( 2013R1A2A2A05006466 ). Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

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doi = "10.1016/j.cattod.2016.03.014",

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T2 - pH effect and iopromide removal

AU - Yoon, Y.

AU - Oh, H.

AU - Ahn, Y. T.

AU - Kwon, M.

AU - Jung, Y.

AU - Park, W. K.

AU - Hwang, T. M.

AU - Yang, W. S.

AU - Kang, J. W.

N1 - Funding Information: This research was supported by a grant from the Advanced Technology Center R&D Program funded by the Ministry of Trade, Industry & Energy of Korea ( 10048475 ), by the Korea government Ministry of Knowledge Economy , the Technology Innovation Program (No. 10044410 , commercialization of flexible touch panels based on 900 × 1600 mm 2 large, less than 1-nm thick graphene film synthesis technique, and by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) ( 2013R1A2A2A05006466 ). Publisher Copyright: © 2016 Elsevier B.V.

PY - 2017/3/15

Y1 - 2017/3/15

N2 - Graphene-based materials, including graphene oxide (GO), reduced-graphene oxide (rGO), and non-oxidative graphene (nOG) were evaluated for catalytic ozonation in water solutions. Among the graphene-based materials evaluated for catalytic ozonation, it was confirmed that rGO was unsuitable to apply to the ozone (O3)/graphene-based materials catalytic process because the high electron mobility of rGO prevented the transformation of O3 into hydroxyl radicals ([rad]OH). On the other hand, GO, which had sufficient oxygenated functional groups on the surface, decomposed and generated the most amount of O3 and [rad]OH, respectively. Although O3/nOG process produced a lower amount of [rad]OH than O3/GO process, nOG was more effective than GO for the transformation yields of O3 into [rad]OH. Furthermore, nOG could generate [rad]OH not only in the bulk phase, but also on the surface of nOG during catalytic ozonation. However, iopromide (IPM) was effectively removed during O3/GO process due to the more [rad]OH generated in the bulk phase than O3/nOG process.

AB - Graphene-based materials, including graphene oxide (GO), reduced-graphene oxide (rGO), and non-oxidative graphene (nOG) were evaluated for catalytic ozonation in water solutions. Among the graphene-based materials evaluated for catalytic ozonation, it was confirmed that rGO was unsuitable to apply to the ozone (O3)/graphene-based materials catalytic process because the high electron mobility of rGO prevented the transformation of O3 into hydroxyl radicals ([rad]OH). On the other hand, GO, which had sufficient oxygenated functional groups on the surface, decomposed and generated the most amount of O3 and [rad]OH, respectively. Although O3/nOG process produced a lower amount of [rad]OH than O3/GO process, nOG was more effective than GO for the transformation yields of O3 into [rad]OH. Furthermore, nOG could generate [rad]OH not only in the bulk phase, but also on the surface of nOG during catalytic ozonation. However, iopromide (IPM) was effectively removed during O3/GO process due to the more [rad]OH generated in the bulk phase than O3/nOG process.

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