Photocatalytic degradation of methylene blue under visible light by dye sensitized titania

The use of textile dyes remain relevant in the issue of water pollution. With the potential harm it may possess on the local flora and fauna, various methods of dye removal have been researched and employed, including photocatalytic degradation. TiO2, being a suitable semiconductor for this purpose...

Full description

Saved in:
Bibliographic Details
Published inMaterials research express Vol. 7; no. 1; pp. 15051 - 15058
Main Authors Samuel, Joshua J, Yam, F K
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2020
Subjects
Chlorophyll
Dyes
Methylene blue
nanotubes
natural dyes
Photocatalysis
photocatalytic degradation
Photodegradation
Pollutants
TiO
TiO2 nanotubes
Titanium dioxide
Water pollution
Online AccessGet full text

Cover

More Information
Summary:The use of textile dyes remain relevant in the issue of water pollution. With the potential harm it may possess on the local flora and fauna, various methods of dye removal have been researched and employed, including photocatalytic degradation. TiO2, being a suitable semiconductor for this purpose needs to be sensitized prior to use, either by doping or chemical adsorption in order to activate in visible light. In this study, various natural dyes were employed to sensitize TiO2. It was found that chlorophyll was superior in dye degradation, with about a 60% reduction in dye concentration over a target 2 h, greater than that of the synthetic sensitizer N-719. This places chlorophyll based photocatalytic reactors as a potential tool for organic pollutant degradation which are also easy to manufacture and abundant in nature.
Bibliography:MRX2-103578.R1
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/ab6409