ESR analysis on the ozone enhanced photocatalytic activity of aqueous nanosized titanium dioxide suspensions

Miao Miao Ye; Zhong Lin Chen; Ji Min Shen; Yue Ben; Xiao Wei Liu

ESR analysis on the ozone enhanced photocatalytic activity of aqueous nanosized titanium dioxide suspensions

Miao Miao Ye^*
, Zhong Lin Chen
, Ji Min Shen
, Yue Ben
, Xiao Wei Liu

^*Corresponding author for this work

School of Environment

Harbin Institute of Technology

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

3 Scopus citations

Abstract

The reaction activities of UV, O₃, TiO₂/O₃, TiO₂/UV/O₂, UV/O₃ and TiO₂/UV/O₃ six different processes were tested in aqueous or dimethylsulfoxide (DMSO) suspensions using electron spin resonance (ESR) technique with 5, 5-dimethyl-l-pyrroline N-oxide (DMPO) spin trap, in the meantime, the effect of different reaction time, amount of catalyst used and dissolved oxygen on the formation of ·OH and · O₂^- in TiO₂/UV/O₃ process were discussed. Result showed that the concentration of 'OH and · O₂^- increased obviously by adding ozone. The relative intensity of DMPO-·OH and DMPO- · O₂ in six different conditions was TiO₂/UV/O₃ > TiO₂/UV/O₂ >UV/O₃ > UV > TiO₂/O₃ > O₃ and TiO₂/UV/O₃ ≈ TiO₂/UV/O₂ > O₂, respectively. At last, the DMPO- · O₃^- was successfully detected in TiO₂/UV/O₃ process.

Original language	English
Pages (from-to)	460-467
Number of pages	8
Journal	Yingxiang Kexue yu Guanghuaxue/Imaging Science and Photochemistry
Volume	26
Issue number	6
State	Published - Nov 2008

Keywords

ESR
Ozone
Photocatalysis
Radical
Titanium dioxide

Cite this

@article{b22bd8e4b59c45c4aee5bb2ee5c2ba70,

title = "ESR analysis on the ozone enhanced photocatalytic activity of aqueous nanosized titanium dioxide suspensions",

abstract = "The reaction activities of UV, O3, TiO2/O3, TiO2/UV/O2, UV/O3 and TiO2/UV/O3 six different processes were tested in aqueous or dimethylsulfoxide (DMSO) suspensions using electron spin resonance (ESR) technique with 5, 5-dimethyl-l-pyrroline N-oxide (DMPO) spin trap, in the meantime, the effect of different reaction time, amount of catalyst used and dissolved oxygen on the formation of ·OH and · O2- in TiO2/UV/O3 process were discussed. Result showed that the concentration of 'OH and · O2- increased obviously by adding ozone. The relative intensity of DMPO-·OH and DMPO- · O2 in six different conditions was TiO2/UV/O3 > TiO2/UV/O2 >UV/O3 > UV > TiO2/O3 > O3 and TiO2/UV/O3 ≈ TiO2/UV/O2 > O2, respectively. At last, the DMPO- · O3- was successfully detected in TiO2/UV/O3 process.",

keywords = "ESR, Ozone, Photocatalysis, Radical, Titanium dioxide",

author = "Ye, \{Miao Miao\} and Chen, \{Zhong Lin\} and Shen, \{Ji Min\} and Yue Ben and Liu, \{Xiao Wei\}",

year = "2008",

month = nov,

language = "英语",

volume = "26",

pages = "460--467",

journal = "Yingxiang Kexue yu Guanghuaxue/Imaging Science and Photochemistry",

issn = "1674-0475",

publisher = "Science Press ",

number = "6",

}

TY - JOUR

T1 - ESR analysis on the ozone enhanced photocatalytic activity of aqueous nanosized titanium dioxide suspensions

AU - Ye, Miao Miao

AU - Chen, Zhong Lin

AU - Shen, Ji Min

AU - Ben, Yue

AU - Liu, Xiao Wei

PY - 2008/11

Y1 - 2008/11

N2 - The reaction activities of UV, O3, TiO2/O3, TiO2/UV/O2, UV/O3 and TiO2/UV/O3 six different processes were tested in aqueous or dimethylsulfoxide (DMSO) suspensions using electron spin resonance (ESR) technique with 5, 5-dimethyl-l-pyrroline N-oxide (DMPO) spin trap, in the meantime, the effect of different reaction time, amount of catalyst used and dissolved oxygen on the formation of ·OH and · O2- in TiO2/UV/O3 process were discussed. Result showed that the concentration of 'OH and · O2- increased obviously by adding ozone. The relative intensity of DMPO-·OH and DMPO- · O2 in six different conditions was TiO2/UV/O3 > TiO2/UV/O2 >UV/O3 > UV > TiO2/O3 > O3 and TiO2/UV/O3 ≈ TiO2/UV/O2 > O2, respectively. At last, the DMPO- · O3- was successfully detected in TiO2/UV/O3 process.

AB - The reaction activities of UV, O3, TiO2/O3, TiO2/UV/O2, UV/O3 and TiO2/UV/O3 six different processes were tested in aqueous or dimethylsulfoxide (DMSO) suspensions using electron spin resonance (ESR) technique with 5, 5-dimethyl-l-pyrroline N-oxide (DMPO) spin trap, in the meantime, the effect of different reaction time, amount of catalyst used and dissolved oxygen on the formation of ·OH and · O2- in TiO2/UV/O3 process were discussed. Result showed that the concentration of 'OH and · O2- increased obviously by adding ozone. The relative intensity of DMPO-·OH and DMPO- · O2 in six different conditions was TiO2/UV/O3 > TiO2/UV/O2 >UV/O3 > UV > TiO2/O3 > O3 and TiO2/UV/O3 ≈ TiO2/UV/O2 > O2, respectively. At last, the DMPO- · O3- was successfully detected in TiO2/UV/O3 process.

KW - ESR

KW - Ozone

KW - Photocatalysis

KW - Radical

KW - Titanium dioxide

UR - https://www.scopus.com/pages/publications/58149127583

M3 - 文章

AN - SCOPUS:58149127583

SN - 1674-0475

VL - 26

SP - 460

EP - 467

JO - Yingxiang Kexue yu Guanghuaxue/Imaging Science and Photochemistry

JF - Yingxiang Kexue yu Guanghuaxue/Imaging Science and Photochemistry

IS - 6

ER -

ESR analysis on the ozone enhanced photocatalytic activity of aqueous nanosized titanium dioxide suspensions

Abstract

Keywords

Other files and links

Fingerprint

Cite this