Antibacterial activity and photocatalysis of electrosprayed titania films

Hyun Yoon; Bhavana Joshi; Seung Heon Na; Sam S. Yoonz

doi:10.1149/2.002211jes

Antibacterial activity and photocatalysis of electrosprayed titania films

Hyun Yoon, Bhavana Joshi, Seung Heon Na, Sam S. Yoonz

School of Mechanical Engineering

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

21 Citations (Scopus)

Abstract

Titanium dioxide (TiO₂) films were successfully deposited on conductive glass substrates by electrostatic spray. The effect of annealing temperature on the structural and photocatalytic properties of TiO₂ films were studied by X-ray diffraction, scanning electron microscopy, AFM (Atomic Force Microscopy), and UV visible spectroscopy. TiO₂ films annealed at higher temperatures showed excellent photocatalytic activity through degradation of methylene blue under UV irradiation. The highest photocatalytic activity (92.2% photodegradation of methylene blue after 4 hours irradiation under UV light) was measured for a TiO₂ film annealed at 500°C because of the formation of a nanocrystalline anatase phase. The antibacterial capabilities of annealed TiO₂ were measured against gram-negative bacteria (Escherichia coli) under UV light (λ = 365 nm and I = 0.6 mW/cm²) and in the dark. Complete sterilization was observed with TiO₂ films annealed at 500°C and 600°C after 1 hour of UV illumination

Original language	English
Pages (from-to)	H823-H827
Journal	Journal of the Electrochemical Society
Volume	159
Issue number	11
DOIs	https://doi.org/10.1149/2.002211jes
Publication status	Published - 2012

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1149/2.002211jes

Cite this

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title = "Antibacterial activity and photocatalysis of electrosprayed titania films",

abstract = "Titanium dioxide (TiO2) films were successfully deposited on conductive glass substrates by electrostatic spray. The effect of annealing temperature on the structural and photocatalytic properties of TiO2 films were studied by X-ray diffraction, scanning electron microscopy, AFM (Atomic Force Microscopy), and UV visible spectroscopy. TiO2 films annealed at higher temperatures showed excellent photocatalytic activity through degradation of methylene blue under UV irradiation. The highest photocatalytic activity (92.2% photodegradation of methylene blue after 4 hours irradiation under UV light) was measured for a TiO2 film annealed at 500°C because of the formation of a nanocrystalline anatase phase. The antibacterial capabilities of annealed TiO2 were measured against gram-negative bacteria (Escherichia coli) under UV light (λ = 365 nm and I = 0.6 mW/cm2) and in the dark. Complete sterilization was observed with TiO2 films annealed at 500°C and 600°C after 1 hour of UV illumination",

author = "Hyun Yoon and Bhavana Joshi and Na, {Seung Heon} and Yoonz, {Sam S.}",

year = "2012",

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T1 - Antibacterial activity and photocatalysis of electrosprayed titania films

AU - Yoon, Hyun

AU - Joshi, Bhavana

AU - Na, Seung Heon

AU - Yoonz, Sam S.

PY - 2012

Y1 - 2012

N2 - Titanium dioxide (TiO2) films were successfully deposited on conductive glass substrates by electrostatic spray. The effect of annealing temperature on the structural and photocatalytic properties of TiO2 films were studied by X-ray diffraction, scanning electron microscopy, AFM (Atomic Force Microscopy), and UV visible spectroscopy. TiO2 films annealed at higher temperatures showed excellent photocatalytic activity through degradation of methylene blue under UV irradiation. The highest photocatalytic activity (92.2% photodegradation of methylene blue after 4 hours irradiation under UV light) was measured for a TiO2 film annealed at 500°C because of the formation of a nanocrystalline anatase phase. The antibacterial capabilities of annealed TiO2 were measured against gram-negative bacteria (Escherichia coli) under UV light (λ = 365 nm and I = 0.6 mW/cm2) and in the dark. Complete sterilization was observed with TiO2 films annealed at 500°C and 600°C after 1 hour of UV illumination

AB - Titanium dioxide (TiO2) films were successfully deposited on conductive glass substrates by electrostatic spray. The effect of annealing temperature on the structural and photocatalytic properties of TiO2 films were studied by X-ray diffraction, scanning electron microscopy, AFM (Atomic Force Microscopy), and UV visible spectroscopy. TiO2 films annealed at higher temperatures showed excellent photocatalytic activity through degradation of methylene blue under UV irradiation. The highest photocatalytic activity (92.2% photodegradation of methylene blue after 4 hours irradiation under UV light) was measured for a TiO2 film annealed at 500°C because of the formation of a nanocrystalline anatase phase. The antibacterial capabilities of annealed TiO2 were measured against gram-negative bacteria (Escherichia coli) under UV light (λ = 365 nm and I = 0.6 mW/cm2) and in the dark. Complete sterilization was observed with TiO2 films annealed at 500°C and 600°C after 1 hour of UV illumination

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Antibacterial activity and photocatalysis of electrosprayed titania films

Abstract

ASJC Scopus subject areas

UN SDGs

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