Photoelectrocatalytic and photocatalytic disinfection of E. coli suspensions by titanium dioxide

Christensen, Paul; Curtis, Tom; Egerton, Terry A.; Kosa, Samia A.; Tinlin, James

doi:10.1016/s0926-3373(02)00172-8

Cited by 193 publications

(120 citation statements)

References 30 publications

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“…At the same time, the conductive of the CNT network can facilitate the electron transfer between the adsorbed dye molecules and the catalyst substrate. 28 It was beneficial for the enhancement of the PC activity of these composites. Moreover, yttrium particles were fixed on the surface of the CNT network in small clusters, and the distribution was not uniform.…”

Section: Resultsmentioning

confidence: 97%

Visible Light Photoelectrocatalytic Properties of Novel Yttrium Treated Carbon Nanotube/Titania Composite Electrodes

Zhang¹,

Chen²,

Zhang³

et al. 2010

Bulletin of the Korean Chemical Society

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Photoelectrocatalytic decolorization of methlene blue (MB) in the presence of two types of carbon nanotube/titania and yttrium-treated carbon nanotube/titania electrodes in aqueous solutions were studied under visible light. The prepared composite electrodes were characterized by X-ray diffraction, transmission and scanning electron microscopy, energy dispersive X-ray analysis, and photoelectrocatalytic activity. The photoelectrocatalytic performances of the supported catalysts were evaluated for the decolorization of MB solution under visible light irradiation. The results showed that yttrium incorporation enhanced the decolorization rate of MB. It was found that the photoelectrocatalytic degradation of a MB solution could be attributed to the combined effects caused by the photo-degradation of titania, the electron assistance of carbon nanotube network, the enhancement of yttrium and a function of the applied potential. The repeatability of photocatalytic activity was also tested. The presence of yttrium enhanced the hydrophillicity of yttrium-carbon nanotubes/titania electrode because more OH groups can be adsorbed on the surface.

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Section: Resultsmentioning

confidence: 97%

Visible Light Photoelectrocatalytic Properties of Novel Yttrium Treated Carbon Nanotube/Titania Composite Electrodes

Zhang¹,

Chen²,

Zhang³

et al. 2010

Bulletin of the Korean Chemical Society

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“…At the same time, the conductive of the CNT network can facilitate the electron transfer between the adsorbed dyes molecules and the catalyst substrate. 32 It was beneficial for the enhancement of the photocatalytic activity of these composites. Moreover, silver particles were fixed on the surface of the CNT network in small clusters, and the distribution was not uniform.…”

Section: Resultsmentioning

confidence: 99%

Characterization and Photonic Effect of Novel Ag-CNT/TiO₂Composites and their Bactericidal Activities

Zhang¹,

Oh²

2010

Bulletin of the Korean Chemical Society

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A novel composite (Ag-CNT/TiO2) of silver treated carbon nanotubes (Ag-CNT) and TiO2 was synthesized via wet chemistry followed by a heat treatment. The dispersion and structure of the silver in the synthesized composites determined by X-ray diffraction (XRD), energy dispersive X-ray (EDX) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy(TEM). XRD patterns of the composites showed that the composites contained a mixing anatase and rutile phase. The EDX spectra showed the presence of C, O, Ti and Ag peaks. The TiO2 particles were distributed uniformly in the CNT network, and silver particles were virtually fixed on the surface of the tube. The photocatalysis degraded behaviors of the Ag-CNT/TiO2 composites of the methylene blue, which increased with an increase of the silver component. The Ag-CNT/TiO2 composites have excellent antibacterial activities against Escherichia coli (E. Coli), Pseudomonas aeruginosa (P. Aeru) and Bacillus subtilis (B. Sub) under visible light.

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“…Therefore, the higher PC activity of the CNTs/TiO 2 composites prepared might be attributed to chemical degradation. At the same time, the conductive of CNTs network can facilitate the electron transfer between the adsorbed MB molecules and the catalyst substrate [31][32][33][34] ; it was beneficial for the PEC reaction because the PEC reaction is carried out on the surface of the CNT/TiO 2 composites catalysts and the CNTs network. So the CNT/TiO 2 composites would show an excellent PEC activity.…”

Section: Structure and Morphology Of Cnt/tio 2 Compositesmentioning

confidence: 99%

Synthesis and Characterization of CNT / TiO₂Photoelectrocatalytic Electrodes for Methlene Blue Degradation

Zhang¹,

Chen²,

Oh³

2008

Korean. J. Mater. Res.

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In this study, two series of CNT/TiO 2 electrodes were prepared. The decrease of surface area compared with that of the pristine carbon nanotubes (CNTs) indicated the blocking of micropores on the surface of the CNTs; was further supported by scanning electron microscopy (SEM) and field emission SEM (FE-SEM) observations. The X-ray diffraction (XRD) results showed that the CNT/TiO particles. The energy dispersive X-ray spectroscopy (EDX) spectra showed the presence of C, O and Ti peaks for all samples. It was found that catalytic decomposition of methylene blue (MB) solution could be attributed to synthetic effects between the TiO 2 photocatalysis and electro-assisted CNTs network, and that photoelectrocatalytic oxidation increased with an increase of CNT composition. It was also found that the photoelectrocatalytic oxidation efficiency for MB is higher than that of photocatalytic oxidation. Moreover, the CNT/TiO 2 composites catalyst prepared by the impregnation method demonstrates higher photoelectrocatalytic activity than the mechanical mixture with the same CNT content.

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Photoelectrocatalytic and photocatalytic disinfection of E. coli suspensions by titanium dioxide

Cited by 193 publications

References 30 publications

Visible Light Photoelectrocatalytic Properties of Novel Yttrium Treated Carbon Nanotube/Titania Composite Electrodes

Visible Light Photoelectrocatalytic Properties of Novel Yttrium Treated Carbon Nanotube/Titania Composite Electrodes

Characterization and Photonic Effect of Novel Ag-CNT/TiO₂Composites and their Bactericidal Activities

Synthesis and Characterization of CNT / TiO₂Photoelectrocatalytic Electrodes for Methlene Blue Degradation

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Photoelectrocatalytic and photocatalytic disinfection of E. coli suspensions by titanium dioxide

Cited by 193 publications

References 30 publications

Visible Light Photoelectrocatalytic Properties of Novel Yttrium Treated Carbon Nanotube/Titania Composite Electrodes

Visible Light Photoelectrocatalytic Properties of Novel Yttrium Treated Carbon Nanotube/Titania Composite Electrodes

Characterization and Photonic Effect of Novel Ag-CNT/TiO2Composites and their Bactericidal Activities

Synthesis and Characterization of CNT / TiO₂Photoelectrocatalytic Electrodes for Methlene Blue Degradation

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Characterization and Photonic Effect of Novel Ag-CNT/TiO₂Composites and their Bactericidal Activities