fulltext.study @t Gmail

Enhanced photocatalytic degradation of methylene blue under vacuum ultraviolet irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
55116 47040 2013 6 PDF Available
Title
Enhanced photocatalytic degradation of methylene blue under vacuum ultraviolet irradiation
Abstract

A vacuum ultraviolet (VUV) lamp was used as the irradiation of photocatalysis to enhance the degradation of methylene blue (MB), a model dye compound. In contrast to photocatalysis under 254 nm UV irradiation (UV/TiO2), photocatalysis under VUV irradiation (VUV/TiO2) exhibited much higher efficiency in MB degradation and mineralization and needed less TiO2 dosage. The rate constant of MB degradation in VUV/TiO2 (0.0793 min−1) is about 4 times of that of UV/TiO2 (0.0205 min−1). The MB mineralization rate is also greatly increased from 12.5% in UV/TiO2 to 47.7% in VUV/TiO2 after 60 min of irradiation. Multiple advanced oxidation processes including photocatalytic oxidation and VUV photo-oxidation coexist in VUV/TiO2 to substantially produce highly reactive species (such as OH and energetic photons), which is responsible for efficient degradation and mineralization of MB.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (110 K)Download as PowerPoint slideHighlights► Photocatalytic oxidation of methylene blue was conducted under VUV irradiation. ► VUV/TiO2 obtains much higher degradation and mineralization rate than UV/TiO2. ► Multiple advanced oxidation processes coexist to produce highly reactive species.

Keywords
Photocatalytic degradation; Photolysis; Vacuum ultraviolet irradiation; Methylene blue; Mineralization
First Page Preview
Enhanced photocatalytic degradation of methylene blue under vacuum ultraviolet irradiation
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: Catalysis Today - Volume 201, 1 March 2013, Pages 189–194
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