Impact of humidity on the removal of volatile organic compounds over Fe loaded TiO2 under visible light irradiation: Insight into photocatalysis mechanism by operando DRIFTS

Shahid Saqlain; Byeong Jun Cha; Soong Yeon Kim; Ji Yeong Sung; Myoung Choul Choi; Hyun Ook Seo; Young Dok Kim

doi:10.1016/j.mtcomm.2021.102119

Impact of humidity on the removal of volatile organic compounds over Fe loaded TiO₂ under visible light irradiation: Insight into photocatalysis mechanism by operando DRIFTS

Shahid Saqlain, Byeong Jun Cha, Soong Yeon Kim, Ji Yeong Sung, Myoung Choul Choi, Hyun Ook Seo, Young Dok Kim

Dept. of Fine Chemistry

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

37 Scopus citations

Abstract

A Fe-TiO₂ photocatalyst was manufactured using temperature regulated chemical vapour deposition and subsequent annealing at 750 °C. Photocatalytic removal of acetaldehyde and toluene over Fe-TiO₂ under visible light were studied at various humid conditions (0, 30, and 60 relative humidity %, RH%). The total oxidation of the two volatile organic compounds (VOCs) on the Fe-TiO₂ surface can be facilitated by water vapours although the apparent removal of the VOCs reduced with increasing humidity due to the competitive adsorption between water and VOCs. Besides, the decomposition pathways of two VOCs on the Fe-TiO₂ surface can be varied by humidity levels. The total oxidation of acetaldehyde was gradually enhanced with increasing humidity. Whereas the total oxidation of toluene was maximized at moderate RH condition (30 RH%) and further increase in humidity (60 RH%) inhibited the total oxidation. We also demonstrated two possible regeneration methods for efficient recovery of the photocatalytic activity of spent Fe-TiO₂ for real air purifying applications.

Original language	English
Article number	102119
Journal	Materials Today Communications
Volume	26
DOIs	https://doi.org/10.1016/j.mtcomm.2021.102119
State	Published - Mar 2021

Keywords

Humidity dependence
Operando DRIFTS
Photocatalysis mechanism
Regeneration
Visible light active catalyst

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10.1016/j.mtcomm.2021.102119

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title = "Impact of humidity on the removal of volatile organic compounds over Fe loaded TiO2 under visible light irradiation: Insight into photocatalysis mechanism by operando DRIFTS",

abstract = "A Fe-TiO2 photocatalyst was manufactured using temperature regulated chemical vapour deposition and subsequent annealing at 750 °C. Photocatalytic removal of acetaldehyde and toluene over Fe-TiO2 under visible light were studied at various humid conditions (0, 30, and 60 relative humidity \%, RH\%). The total oxidation of the two volatile organic compounds (VOCs) on the Fe-TiO2 surface can be facilitated by water vapours although the apparent removal of the VOCs reduced with increasing humidity due to the competitive adsorption between water and VOCs. Besides, the decomposition pathways of two VOCs on the Fe-TiO2 surface can be varied by humidity levels. The total oxidation of acetaldehyde was gradually enhanced with increasing humidity. Whereas the total oxidation of toluene was maximized at moderate RH condition (30 RH\%) and further increase in humidity (60 RH\%) inhibited the total oxidation. We also demonstrated two possible regeneration methods for efficient recovery of the photocatalytic activity of spent Fe-TiO2 for real air purifying applications.",

keywords = "Humidity dependence, Operando DRIFTS, Photocatalysis mechanism, Regeneration, Visible light active catalyst",

author = "Shahid Saqlain and Cha, \{Byeong Jun\} and Kim, \{Soong Yeon\} and Sung, \{Ji Yeong\} and Choi, \{Myoung Choul\} and Seo, \{Hyun Ook\} and Kim, \{Young Dok\}",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = mar,

doi = "10.1016/j.mtcomm.2021.102119",

language = "English",

volume = "26",

journal = "Materials Today Communications",

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T1 - Impact of humidity on the removal of volatile organic compounds over Fe loaded TiO2 under visible light irradiation

T2 - Insight into photocatalysis mechanism by operando DRIFTS

AU - Saqlain, Shahid

AU - Cha, Byeong Jun

AU - Kim, Soong Yeon

AU - Sung, Ji Yeong

AU - Choi, Myoung Choul

AU - Seo, Hyun Ook

AU - Kim, Young Dok

PY - 2021/3

Y1 - 2021/3

N2 - A Fe-TiO2 photocatalyst was manufactured using temperature regulated chemical vapour deposition and subsequent annealing at 750 °C. Photocatalytic removal of acetaldehyde and toluene over Fe-TiO2 under visible light were studied at various humid conditions (0, 30, and 60 relative humidity %, RH%). The total oxidation of the two volatile organic compounds (VOCs) on the Fe-TiO2 surface can be facilitated by water vapours although the apparent removal of the VOCs reduced with increasing humidity due to the competitive adsorption between water and VOCs. Besides, the decomposition pathways of two VOCs on the Fe-TiO2 surface can be varied by humidity levels. The total oxidation of acetaldehyde was gradually enhanced with increasing humidity. Whereas the total oxidation of toluene was maximized at moderate RH condition (30 RH%) and further increase in humidity (60 RH%) inhibited the total oxidation. We also demonstrated two possible regeneration methods for efficient recovery of the photocatalytic activity of spent Fe-TiO2 for real air purifying applications.

AB - A Fe-TiO2 photocatalyst was manufactured using temperature regulated chemical vapour deposition and subsequent annealing at 750 °C. Photocatalytic removal of acetaldehyde and toluene over Fe-TiO2 under visible light were studied at various humid conditions (0, 30, and 60 relative humidity %, RH%). The total oxidation of the two volatile organic compounds (VOCs) on the Fe-TiO2 surface can be facilitated by water vapours although the apparent removal of the VOCs reduced with increasing humidity due to the competitive adsorption between water and VOCs. Besides, the decomposition pathways of two VOCs on the Fe-TiO2 surface can be varied by humidity levels. The total oxidation of acetaldehyde was gradually enhanced with increasing humidity. Whereas the total oxidation of toluene was maximized at moderate RH condition (30 RH%) and further increase in humidity (60 RH%) inhibited the total oxidation. We also demonstrated two possible regeneration methods for efficient recovery of the photocatalytic activity of spent Fe-TiO2 for real air purifying applications.

KW - Humidity dependence

KW - Operando DRIFTS

KW - Photocatalysis mechanism

KW - Regeneration

KW - Visible light active catalyst

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U2 - 10.1016/j.mtcomm.2021.102119

DO - 10.1016/j.mtcomm.2021.102119

M3 - Article

AN - SCOPUS:85100956685

SN - 2352-4928

VL - 26

JO - Materials Today Communications

JF - Materials Today Communications

M1 - 102119

ER -

Impact of humidity on the removal of volatile organic compounds over Fe loaded TiO₂ under visible light irradiation: Insight into photocatalysis mechanism by operando DRIFTS

Abstract

Keywords

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