Synthesis of Ag ion-implanted TiO2 thin films for antibacterial application and photocatalytic performance.
Identifieur interne : 000751 ( Main/Corpus ); précédent : 000750; suivant : 000752Synthesis of Ag ion-implanted TiO2 thin films for antibacterial application and photocatalytic performance.
Auteurs : Xinggang Hou ; Huiyan Ma ; Feng Liu ; Jianhua Deng ; Yukai Ai ; Xinlei Zhao ; Dong Mao ; Dejun Li ; Bin LiaoSource :
- Journal of hazardous materials [ 1873-3336 ] ; 2015.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Anti-Bacterial Agents, Silver, Titanium.
- chemical , pharmacology : Anti-Bacterial Agents.
- Catalysis, Microscopy, Atomic Force, Microscopy, Electron, Scanning, Photochemical Processes.
Abstract
TiO2 thin films were deposited by spin coating method. Silver ions were implanted into the films using a Metal Vapor Vacuum Arc implanter. The antibacterial ability of implanted films was tested using Escherichia coli removal under fluorescent irradiation and in the dark. The concentration of E. coli was evaluated by plating technique. The photocatalytic efficiency of the implanted films was studied by degradation of methyl orange under fluorescent illumination. The surface free energy of the implanted TiO2 films was calculated by contact angle testing. Vitamin C was used as radical scavengers to explore the antibacterial mechanism of the films. The results supported the model that both generation of reactive oxygen species and release of silver ions played critical roles in the toxic effect of implanted films against E. coli. XPS experimental results demonstrated that a portion of the Ag(Ag(3+)) ions were doped into the crystalline lattice of TiO2. As demonstrated by density functional theory calculations, the impurity energy level of subtitutional Ag was responsible for enhanced absorption of visible light. Ag ion-implanted TiO2 films with excellent antibacterial efficiency against bacteria and decomposed ability against organic pollutants could be potent bactericidal surface in moist environment.
DOI: 10.1016/j.jhazmat.2015.05.014
PubMed: 26093355
Links to Exploration step
pubmed:26093355Le document en format XML
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<term>Microscopy, Atomic Force (MeSH)</term>
<term>Microscopy, Electron, Scanning (MeSH)</term>
<term>Photochemical Processes (MeSH)</term>
<term>Silver (chemistry)</term>
<term>Titanium (chemistry)</term>
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<front><div type="abstract" xml:lang="en">TiO2 thin films were deposited by spin coating method. Silver ions were implanted into the films using a Metal Vapor Vacuum Arc implanter. The antibacterial ability of implanted films was tested using Escherichia coli removal under fluorescent irradiation and in the dark. The concentration of E. coli was evaluated by plating technique. The photocatalytic efficiency of the implanted films was studied by degradation of methyl orange under fluorescent illumination. The surface free energy of the implanted TiO2 films was calculated by contact angle testing. Vitamin C was used as radical scavengers to explore the antibacterial mechanism of the films. The results supported the model that both generation of reactive oxygen species and release of silver ions played critical roles in the toxic effect of implanted films against E. coli. XPS experimental results demonstrated that a portion of the Ag(Ag(3+)) ions were doped into the crystalline lattice of TiO2. As demonstrated by density functional theory calculations, the impurity energy level of subtitutional Ag was responsible for enhanced absorption of visible light. Ag ion-implanted TiO2 films with excellent antibacterial efficiency against bacteria and decomposed ability against organic pollutants could be potent bactericidal surface in moist environment. </div>
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<Abstract><AbstractText>TiO2 thin films were deposited by spin coating method. Silver ions were implanted into the films using a Metal Vapor Vacuum Arc implanter. The antibacterial ability of implanted films was tested using Escherichia coli removal under fluorescent irradiation and in the dark. The concentration of E. coli was evaluated by plating technique. The photocatalytic efficiency of the implanted films was studied by degradation of methyl orange under fluorescent illumination. The surface free energy of the implanted TiO2 films was calculated by contact angle testing. Vitamin C was used as radical scavengers to explore the antibacterial mechanism of the films. The results supported the model that both generation of reactive oxygen species and release of silver ions played critical roles in the toxic effect of implanted films against E. coli. XPS experimental results demonstrated that a portion of the Ag(Ag(3+)) ions were doped into the crystalline lattice of TiO2. As demonstrated by density functional theory calculations, the impurity energy level of subtitutional Ag was responsible for enhanced absorption of visible light. Ag ion-implanted TiO2 films with excellent antibacterial efficiency against bacteria and decomposed ability against organic pollutants could be potent bactericidal surface in moist environment. </AbstractText>
<CopyrightInformation>Copyright © 2015 Elsevier B.V. All rights reserved.</CopyrightInformation>
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