Effect of chalcogens (S, Se, and Te) on the anatase phase stability and photocatalytic antimicrobial activity of TiO2

Snehamol Mathew; Priyanka Ganguly; Vignesh Kumaravel; John Harrison; Steven J. Hinder; John Bartlett; Suresh C. Pillai

doi:10.1016/j.matpr.2020.01.336

Effect of chalcogens (S, Se, and Te) on the anatase phase stability and photocatalytic antimicrobial activity of TiO₂

Snehamol Mathew, Priyanka Ganguly, Vignesh Kumaravel, John Harrison, Steven J. Hinder, John Bartlett, Suresh C. Pillai

Research output: Contribution to journal › Conference article › peer-review

29 Citations (Scopus)

Abstract

The effect of chalcogens such as sulphur (S), selenium (Se), and tellurium (Te) on the anatase to rutile phase transition (ART) of titanium dioxide (TiO₂) was investigated. 2â€»mol % of chalcogen doped TiO₂was synthesised via a sol-gel technique. The as-synthesised samples were calcined at different temperatures from 500â€»°C to 800â€»°C for 2â€»h. X-ray diffraction (XRD) and Raman spectroscopy were used to study the ART of TiO₂. Te-TiO₂showed the highest anatase phase (44%) at 750â€»°C as compared to other samples. X-ray photoelectron spectroscopy (XPS) and UV-visible diffuse reflectance spectroscopy (UV-DRS) was further utilised to investigate the oxidation state and optical properties. UV-DRS results showed that the substitutional doping of chalcogens in the TiO₂lattice enhanced visible light absorption. The photocatalytic efficiency was tested for the disinfection of Escherichia coli (E.coli) under visible light irradiation. It is noted that while the chalcogen modified TiO₂improved the anatase stability the antimicrobial activity is not significantly enhanced compared to pure anatase TiO₂under visible light illumination. Te-TiO₂attained 100% disinfection within 70â€»min of visible light irradiation and maintained equal antibacterial efficiency as pure TiO₂at 750â€»°C.

Original language	English
Pages (from-to)	2458-2464
Number of pages	7
Journal	Materials Today: Proceedings
Volume	33
DOIs	https://doi.org/10.1016/j.matpr.2020.01.336
Publication status	Published - 2019
Event	2019 Fall Meeting Metal Oxide- and Oxyhydride-based Nanomaterials for Energy and Environment-related Applications, EMRS 2019 - Warsaw, Poland Duration: 16 Sep 2019 → 19 Sep 2019

Keywords

Antibacterial
Doping
Nanomaterials
Photocatalysis
Photoluminescence
Titania

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10.1016/j.matpr.2020.01.336

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@article{293c7771b56c4b3c9edbf2aa355fbe8b,

title = "Effect of chalcogens (S, Se, and Te) on the anatase phase stability and photocatalytic antimicrobial activity of TiO2",

abstract = "The effect of chalcogens such as sulphur (S), selenium (Se), and tellurium (Te) on the anatase to rutile phase transition (ART) of titanium dioxide (TiO2) was investigated. 2{\^a}€»mol % of chalcogen doped TiO2was synthesised via a sol-gel technique. The as-synthesised samples were calcined at different temperatures from 500{\^a}€»°C to 800{\^a}€»°C for 2{\^a}€»h. X-ray diffraction (XRD) and Raman spectroscopy were used to study the ART of TiO2. Te-TiO2showed the highest anatase phase (44%) at 750{\^a}€»°C as compared to other samples. X-ray photoelectron spectroscopy (XPS) and UV-visible diffuse reflectance spectroscopy (UV-DRS) was further utilised to investigate the oxidation state and optical properties. UV-DRS results showed that the substitutional doping of chalcogens in the TiO2lattice enhanced visible light absorption. The photocatalytic efficiency was tested for the disinfection of Escherichia coli (E.coli) under visible light irradiation. It is noted that while the chalcogen modified TiO2improved the anatase stability the antimicrobial activity is not significantly enhanced compared to pure anatase TiO2under visible light illumination. Te-TiO2attained 100% disinfection within 70{\^a}€»min of visible light irradiation and maintained equal antibacterial efficiency as pure TiO2at 750{\^a}€»°C.",

keywords = "Antibacterial, Doping, Nanomaterials, Photocatalysis, Photoluminescence, Titania",

author = "Snehamol Mathew and Priyanka Ganguly and Vignesh Kumaravel and John Harrison and Hinder, {Steven J.} and John Bartlett and Pillai, {Suresh C.}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd. All rights reserved.; 2019 Fall Meeting Metal Oxide- and Oxyhydride-based Nanomaterials for Energy and Environment-related Applications, EMRS 2019 ; Conference date: 16-09-2019 Through 19-09-2019",

year = "2019",

doi = "10.1016/j.matpr.2020.01.336",

language = "English",

volume = "33",

pages = "2458--2464",

journal = "Materials Today: Proceedings",

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TY - JOUR

T1 - Effect of chalcogens (S, Se, and Te) on the anatase phase stability and photocatalytic antimicrobial activity of TiO2

AU - Mathew, Snehamol

AU - Ganguly, Priyanka

AU - Kumaravel, Vignesh

AU - Harrison, John

AU - Hinder, Steven J.

AU - Bartlett, John

AU - Pillai, Suresh C.

PY - 2019

Y1 - 2019

N2 - The effect of chalcogens such as sulphur (S), selenium (Se), and tellurium (Te) on the anatase to rutile phase transition (ART) of titanium dioxide (TiO2) was investigated. 2â€»mol % of chalcogen doped TiO2was synthesised via a sol-gel technique. The as-synthesised samples were calcined at different temperatures from 500â€»°C to 800â€»°C for 2â€»h. X-ray diffraction (XRD) and Raman spectroscopy were used to study the ART of TiO2. Te-TiO2showed the highest anatase phase (44%) at 750â€»°C as compared to other samples. X-ray photoelectron spectroscopy (XPS) and UV-visible diffuse reflectance spectroscopy (UV-DRS) was further utilised to investigate the oxidation state and optical properties. UV-DRS results showed that the substitutional doping of chalcogens in the TiO2lattice enhanced visible light absorption. The photocatalytic efficiency was tested for the disinfection of Escherichia coli (E.coli) under visible light irradiation. It is noted that while the chalcogen modified TiO2improved the anatase stability the antimicrobial activity is not significantly enhanced compared to pure anatase TiO2under visible light illumination. Te-TiO2attained 100% disinfection within 70â€»min of visible light irradiation and maintained equal antibacterial efficiency as pure TiO2at 750â€»°C.

AB - The effect of chalcogens such as sulphur (S), selenium (Se), and tellurium (Te) on the anatase to rutile phase transition (ART) of titanium dioxide (TiO2) was investigated. 2â€»mol % of chalcogen doped TiO2was synthesised via a sol-gel technique. The as-synthesised samples were calcined at different temperatures from 500â€»°C to 800â€»°C for 2â€»h. X-ray diffraction (XRD) and Raman spectroscopy were used to study the ART of TiO2. Te-TiO2showed the highest anatase phase (44%) at 750â€»°C as compared to other samples. X-ray photoelectron spectroscopy (XPS) and UV-visible diffuse reflectance spectroscopy (UV-DRS) was further utilised to investigate the oxidation state and optical properties. UV-DRS results showed that the substitutional doping of chalcogens in the TiO2lattice enhanced visible light absorption. The photocatalytic efficiency was tested for the disinfection of Escherichia coli (E.coli) under visible light irradiation. It is noted that while the chalcogen modified TiO2improved the anatase stability the antimicrobial activity is not significantly enhanced compared to pure anatase TiO2under visible light illumination. Te-TiO2attained 100% disinfection within 70â€»min of visible light irradiation and maintained equal antibacterial efficiency as pure TiO2at 750â€»°C.

KW - Antibacterial

KW - Doping

KW - Nanomaterials

KW - Photocatalysis

KW - Photoluminescence

KW - Titania

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DO - 10.1016/j.matpr.2020.01.336

M3 - Conference article

AN - SCOPUS:85091328671

SN - 2214-7853

VL - 33

SP - 2458

EP - 2464

JO - Materials Today: Proceedings

JF - Materials Today: Proceedings

T2 - 2019 Fall Meeting Metal Oxide- and Oxyhydride-based Nanomaterials for Energy and Environment-related Applications, EMRS 2019

Y2 - 16 September 2019 through 19 September 2019

ER -

Effect of chalcogens (S, Se, and Te) on the anatase phase stability and photocatalytic antimicrobial activity of TiO₂

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Keywords

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