Photocatalytic destruction of air pollutants with vacuum ultraviolet (VUV) irradiation

Haibao Huang; Dennis Y.C. Leung; Guisheng Li; Michael K.H. Leung; Xianliang Fu

doi:10.1016/j.cattod.2011.04.015

Photocatalytic destruction of air pollutants with vacuum ultraviolet (VUV) irradiation

Haibao Huang, Dennis Y.C. Leung, Guisheng Li, Michael K.H. Leung, Xianliang Fu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

64 Citations (Scopus)

Abstract

Photocatalysis with vacuum ultraviolet (VUV) irradiation (VUV-PCO) was utilized to destroy air pollutants. Escherichia coli (E. coli) and toluene were chosen as the target pollutants. Two parallel reactions with 254nm UV irradiation (254nm-PCO) and without TiO₂ (i.e. VUV photolysis) were also conducted for comparison. Results indicate that VUV-PCO process has a higher efficiency in destroying toluene and inactivating E. coli. In addition, the stability of PCO activity is increased while the byproducts yield is lowered during toluene destruction in the VUV-PCO process. Toluene removal efficiency (TRE) in the VUV-PCO process was more than 5 times higher than that in the 254nm-PCO process. VUV-PCO overcomes some drawbacks of conventional photocatalysis, such as low efficiency and easy photocatalyst deactivation. The destroying mechanism of air pollutants in the VUV-PCO process is greatly different from that of the 254 nm-PCO process. The excellent performance of VUV-PCO system may be attributed to the more reaction processes (such as VUV photolysis and catalytic ozonation) and more reactive species (such as active oxygen and hydroxyl radicals) formed to destroy the pollutants. © 2011 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	310-315
Journal	Catalysis Today
Volume	175
Issue number	1
DOIs	https://doi.org/10.1016/j.cattod.2011.04.015
Publication status	Published - 25 Oct 2011
Externally published	Yes

Research Keywords

Air pollutants
Byproducts
Escherichia coli
Photocatalysis
Toluene
Vacuum ultraviolet irradiation

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10.1016/j.cattod.2011.04.015

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title = "Photocatalytic destruction of air pollutants with vacuum ultraviolet (VUV) irradiation",

abstract = "Photocatalysis with vacuum ultraviolet (VUV) irradiation (VUV-PCO) was utilized to destroy air pollutants. Escherichia coli (E. coli) and toluene were chosen as the target pollutants. Two parallel reactions with 254nm UV irradiation (254nm-PCO) and without TiO2 (i.e. VUV photolysis) were also conducted for comparison. Results indicate that VUV-PCO process has a higher efficiency in destroying toluene and inactivating E. coli. In addition, the stability of PCO activity is increased while the byproducts yield is lowered during toluene destruction in the VUV-PCO process. Toluene removal efficiency (TRE) in the VUV-PCO process was more than 5 times higher than that in the 254nm-PCO process. VUV-PCO overcomes some drawbacks of conventional photocatalysis, such as low efficiency and easy photocatalyst deactivation. The destroying mechanism of air pollutants in the VUV-PCO process is greatly different from that of the 254 nm-PCO process. The excellent performance of VUV-PCO system may be attributed to the more reaction processes (such as VUV photolysis and catalytic ozonation) and more reactive species (such as active oxygen and hydroxyl radicals) formed to destroy the pollutants. {\textcopyright} 2011 Elsevier B.V. All rights reserved.",

keywords = "Air pollutants, Byproducts, Escherichia coli, Photocatalysis, Toluene, Vacuum ultraviolet irradiation",

author = "Haibao Huang and Leung, {Dennis Y.C.} and Guisheng Li and Leung, {Michael K.H.} and Xianliang Fu",

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AU - Huang, Haibao

AU - Leung, Dennis Y.C.

AU - Li, Guisheng

AU - Leung, Michael K.H.

AU - Fu, Xianliang

PY - 2011/10/25

Y1 - 2011/10/25

N2 - Photocatalysis with vacuum ultraviolet (VUV) irradiation (VUV-PCO) was utilized to destroy air pollutants. Escherichia coli (E. coli) and toluene were chosen as the target pollutants. Two parallel reactions with 254nm UV irradiation (254nm-PCO) and without TiO2 (i.e. VUV photolysis) were also conducted for comparison. Results indicate that VUV-PCO process has a higher efficiency in destroying toluene and inactivating E. coli. In addition, the stability of PCO activity is increased while the byproducts yield is lowered during toluene destruction in the VUV-PCO process. Toluene removal efficiency (TRE) in the VUV-PCO process was more than 5 times higher than that in the 254nm-PCO process. VUV-PCO overcomes some drawbacks of conventional photocatalysis, such as low efficiency and easy photocatalyst deactivation. The destroying mechanism of air pollutants in the VUV-PCO process is greatly different from that of the 254 nm-PCO process. The excellent performance of VUV-PCO system may be attributed to the more reaction processes (such as VUV photolysis and catalytic ozonation) and more reactive species (such as active oxygen and hydroxyl radicals) formed to destroy the pollutants. © 2011 Elsevier B.V. All rights reserved.

AB - Photocatalysis with vacuum ultraviolet (VUV) irradiation (VUV-PCO) was utilized to destroy air pollutants. Escherichia coli (E. coli) and toluene were chosen as the target pollutants. Two parallel reactions with 254nm UV irradiation (254nm-PCO) and without TiO2 (i.e. VUV photolysis) were also conducted for comparison. Results indicate that VUV-PCO process has a higher efficiency in destroying toluene and inactivating E. coli. In addition, the stability of PCO activity is increased while the byproducts yield is lowered during toluene destruction in the VUV-PCO process. Toluene removal efficiency (TRE) in the VUV-PCO process was more than 5 times higher than that in the 254nm-PCO process. VUV-PCO overcomes some drawbacks of conventional photocatalysis, such as low efficiency and easy photocatalyst deactivation. The destroying mechanism of air pollutants in the VUV-PCO process is greatly different from that of the 254 nm-PCO process. The excellent performance of VUV-PCO system may be attributed to the more reaction processes (such as VUV photolysis and catalytic ozonation) and more reactive species (such as active oxygen and hydroxyl radicals) formed to destroy the pollutants. © 2011 Elsevier B.V. All rights reserved.

KW - Air pollutants

KW - Byproducts

KW - Escherichia coli

KW - Photocatalysis

KW - Toluene

KW - Vacuum ultraviolet irradiation

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Photocatalytic destruction of air pollutants with vacuum ultraviolet (VUV) irradiation

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