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Silver ion release from electrodes of nanotubes of TiO2 impregnated with Ag nanoparticles applied in photoelectrocatalytic disinfection

Paper ID Volume ID Publish Year Pages File Format Full-Text
27202 44009 2014 8 PDF Available
Title
Silver ion release from electrodes of nanotubes of TiO2 impregnated with Ag nanoparticles applied in photoelectrocatalytic disinfection
Abstract

•TiO2 nanotubes electrode impregnated with Ag nanoparticles was made.•The Ag+ lixiviation was monitored by anodic stripping voltammetry.•Antimicrobial behavior of Ti/TiO2–Ag was evaluated using UV and visible irradiation.

Self-organized TiO2 nanotubes arrays electrodes were impregnated with 0–16% of Ag nanoparticles (Ti/TiO2–Ag) using different procedures. The electrodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and photocurrent vs potential curves. The best results were obtained by electrode prepared by photochemical reduction, after immersion in a solution AgNO3 0.05 M (pH 8). The monitoring of Ag+ lixiviation by anodic stripping voltammetry at glassy carbon electrode indicated that a maximum of 2.5 × 10−6 M is released in the first 40 min of treatment, but it is neglected when used subsequently. Moreover, the antimicrobial behavior of electrodes Ti/TiO2–Ag applied in photoelectrocatalysis presented 100% disinfection in 3 min by using UV irradiation and 99.6% in 30 min with visible irradiation. In addition, the analysis of silver in solution along the reaction shows a negligible lixiviation and a high stability of the surface silver deposits.

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Keywords
Nanotubes TiO2; Ag impregnation; Disinfection; Ag release from Ti/TiO2–Ag; Mycobacterium
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Silver ion release from electrodes of nanotubes of TiO2 impregnated with Ag nanoparticles applied in photoelectrocatalytic disinfection
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 278, 15 March 2014, Pages 1–8
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us