NDLI: Solar photocatalysis for treatment of Acid Yellow-17 (AY-17) dye contaminated water using $Ag@TiO_{2}$ core–shell structured nanoparticles

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Solar photocatalysis for treatment of Acid Yellow-17 (AY-17) dye contaminated water using $Ag@TiO_{2}$ core–shell structured nanoparticles

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Solar photocatalysis for treatment of Acid Yellow-17 (AY-17) dye contaminated water using $Ag@TiO_{2}$ core–shell structured nanoparticles

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Khanna, Ankita Shetty K., Vidya
Description	Country affiliation: India Author Affiliation: Khanna A ( Department of Chemical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, 575 025, India. ankitakhanna1987@gmail.com)
Abstract	Wastewater released from textile industries causes water pollution, and it needs to be treated before discharge to the environment by cost effective technologies. Solar photocatalysis is a promising technology for the treatment of dye wastewater. The $Ag@TiO_{2}$ nanoparticles comprising of Ag core and $TiO_{2}$ shell $(Ag@TiO_{2})$ have unique photocatalytic property of inhibition of electron–hole recombination and visible light absorption, which makes it a promising photocatalyst for use in solar photocatalysis and with higher photocatalytic rate. Therefore, in the present work, the $Ag@TiO_{2}$ nanoparticles synthesized by one pot method with postcalcination step has been used for the degradation of Acid Yellow-17 (AY-17) dye under solar light irradiation. The $Ag@TiO_{2}$ nanoparticles were characterized using thermogravimetric–differential thermal analysis, X-ray diffraction, transmission electron microscopy, selected area electron diffraction, and energy dispersive X-ray analysis. The catalyst has been found to be very effective in solar photocatalysis of AY-17, as compared to other catalysts. The effects of pH, catalyst loading, initial dye concentration, and oxidants on photocatalysis were also studied. The optimized parameters for degradation of AY-17 using $Ag@TiO_{2}$ were found to be pH 3, dye/catalyst ratio of 1:10 (g/g), and 2 g/L of $(NH_{4})_{2}S_{2}O_{8}$ as oxidant. Efficient decolorization and mineralization of AY-17 was achieved. The kinetics of color, total organic carbon, and chemical oxygen demand removal followed the Langmuir–Hinshelwood model. $Ag@TiO_{2}$ catalyst can be reused thrice without much decline in efficiency. The catalyst exhibited its potential as economic photocatalyst for treatment of dye wastewater.
ISSN	09441344
Issue Number	8
Volume Number	20
e-ISSN	16147499
Journal	Environmental Science and Pollution Research
Language	English
Publisher	Springer
Publisher Date	2013-08-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Azo Compounds Chemistry Coloring Agents Metal Nanoparticles Silver Titanium Water Pollutants, Chemical Ammonium Sulfate Radiation Effects Bromates Catalysis Hydrogen Peroxide Hydrogen-ion Concentration Ultrastructure Microscopy, Electron, Transmission Oxidants Ultraviolet Rays Waste Disposal, Fluid Methods Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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