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, Joonwun Kang

Research output: Contribution to journalArticle

11 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 languageEnglish
Pages (from-to)77-85
Number of pages9
JournalCatalysis Today
Volume282
DOIs
Publication statusPublished - 2017 Mar 15

Fingerprint

iopromide
pH effects
Graphite
Graphene
Oxides
Ozonization

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Yoon, Y. ; Oh, H. ; Ahn, Y. T. ; Kwon, M. ; Jung, Y. ; Park, W. K. ; Hwang, T. M. ; Yang, W. S. ; Kang, Joonwun. / Evaluation of the O3/graphene-based materials catalytic process : pH effect and iopromide removal. In: Catalysis Today. 2017 ; Vol. 282. pp. 77-85.
@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 Joonwun Kang",
year = "2017",
month = "3",
day = "15",
doi = "10.1016/j.cattod.2016.03.014",
language = "English",
volume = "282",
pages = "77--85",
journal = "Catalysis Today",
issn = "0920-5861",
publisher = "Elsevier",

}

Evaluation of the O3/graphene-based materials catalytic process : pH effect and iopromide removal. / Yoon, Y.; Oh, H.; Ahn, Y. T.; Kwon, M.; Jung, Y.; Park, W. K.; Hwang, T. M.; Yang, W. S.; Kang, Joonwun.

In: Catalysis Today, Vol. 282, 15.03.2017, p. 77-85.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Evaluation of the O3/graphene-based materials catalytic process

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, Joonwun

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.

UR - http://www.scopus.com/inward/record.url?scp=84999098006&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84999098006&partnerID=8YFLogxK

U2 - 10.1016/j.cattod.2016.03.014

DO - 10.1016/j.cattod.2016.03.014

M3 - Article

VL - 282

SP - 77

EP - 85

JO - Catalysis Today

JF - Catalysis Today

SN - 0920-5861

ER -