fulltext.study @t Gmail

Highly visible-light active nanoporous TiO2 photocatalysts for efficient solar photocatalytic applications

Paper ID Volume ID Publish Year Pages File Format Full-Text
45989 46428 2013 8 PDF Available
Title
Highly visible-light active nanoporous TiO2 photocatalysts for efficient solar photocatalytic applications
Abstract

We report highly visible-light active nanoporous carbon-doped TiO2 (C-TiO2) and sulfur-doped TiO2 (S-TiO2) for environmental and biomedical applications. C-TiO2 and S-TiO2 were synthesized at room temperature without thermal treatment using modified sol–gel processing and ultrasound irradiation. Under visible-light irradiation, the highest photocatalytic activity for S-TiO2 ([k] = 3.121 h−1) was found to be 28 times higher than that of undoped nanoporous TiO2 ([k] = 0.112 h−1). The recyclability of the S-TiO2 photocatalyst was found to be high with the decolorization rate at ∼92% of the initial value after fifteen cycles. Very interestingly, the C-TiO2 and S-TiO2 photocatalysts (crystallite size ∼ 5.5 nm) showed very strong antimicrobial properties against both Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus) compared to 5 nm anatase TiO2 and undoped TiO2 photocatalysts after visible-light exposure for 3 h. More than ∼95% of E. coli was killed, even after ten cycles of use for the S-TiO2 photocatalyst. Thus, we have demonstrated that C-TiO2 and S-TiO2 can serve as multifunctional generic bactericides, as well as highly visible-light active photocatalysts.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The nanoporous C- and S-TiO2 photocatalysts were successfully synthesized at room-temperature. ► The photocatalytic activity of C- and S-TiO2 was found to be higher than that of other TiO2 photocatalysts. ► Moreover, C- and S-TiO2 exhibited excellent antibacterial activity.

Keywords
Titanium dioxide; Photocatalyst; Sol–gel method; Photocatalytic activity
First Page Preview
Highly visible-light active nanoporous TiO2 photocatalysts for efficient solar photocatalytic applications
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 129, 17 January 2013, Pages 106–113
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