fulltext.study @t Gmail

Enhancement of nano titanium dioxide photocatalysis in transparent coatings by polyhydroxy fullerene

Paper ID Volume ID Publish Year Pages File Format Full-Text
46063 46429 2012 8 PDF Available
Title
Enhancement of nano titanium dioxide photocatalysis in transparent coatings by polyhydroxy fullerene
Abstract

Microbe transmission via surfaces is a common mode for the spreading of infectious diseases. A simple way to combat disease transmission via surfaces is to apply antimicrobial coatings. We have developed a thin, transparent, photocatalytic coating for rapid destruction of microbes. The coating uses polyhydroxy fullerene (PHF) as an enhancer for nano TiO2 photocatalysis. A nanocomposite of PHF and TiO2 was synthesized through physical mixing of the two components in aqueous suspension. The nanocomposite was characterized by dynamic light scattering, zeta potential and Langmuir adsorption isotherm. A coating of the PHF/TiO2 nanocomposite was characterized by scanning electron microscopy. Photocatalytic activity of the nanocomposite coating, as indicated by degradation of organic dye (Procion red MX-5B) under UVA illumination, was optimal at a PHF/TiO2 ratio of 0.01. The nanocomposite coating degraded the organic dye twice as fast as a coating of TiO2 that contained no PHF. The nanocomposite coating was then applied to photocatalytically inactivate spores of Aspergillus niger, a household fungus commonly implicated in asthma. The nanocomposite inactivated spores three times as fast as a coating of TiO2 containing no PHF. Changes to the morphology of A. niger spores due to photocatalysis were investigated using scanning electron microscopy.

Graphical abstractPartially decomposed fungal spore on photocatalytic coating.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Polyhydroxy fullerene enhances TiO2 photocatalysis in a thin, transparent coating. ► Polyhydroxy fullerene and TiO2 self-assemble into a nanocomposite. ► Coating of the nanocomposite degraded dye 2× faster than TiO2 alone under UVA. ► Fungal spores were killed by the coating 3 times faster than TiO2 alone under UVA.

Keywords
PHF, polyhydroxy fullerene; TiO2, titanium dioxide; UVA, ultraviolet A; CFU, colony forming unitProcion red MX-5B; TiO2; UVA; Nanocomposite; Antimicrobial coatings; Aspergillus niger; Fungal spores; Fullerol; Fullerenol
First Page Preview
Enhancement of nano titanium dioxide photocatalysis in transparent coatings by polyhydroxy fullerene
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 125, 21 August 2012, Pages 128–135
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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