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Title: Magnetically separable core–shell ZnFe{sub 2}O{sub 4}@ZnO nanoparticles for visible light photodegradation of methyl orange

Abstract

Highlights: • Phase pure, magnetic ZnFe{sub 2}O{sub 4}@ZnO nanoparticles synthesized with excellent yield. • ZnFe{sub 2}O{sub 4}@ZnO displayed higher UV photocatalytic efficiency than ZnO nanoparticles. • First report on visible light photodegradation of methyl orange by ZnFe{sub 2}O{sub 4}@ZnO. • Excellent reusability of ZnFe{sub 2}O{sub 4}@ZnO nanoparticles observed for azo dye removal. - Abstract: Visible light photodegradation of aqueous methyl orange using magnetically separable core–shell ZnFe{sub 2}O{sub 4}@ZnO nanoparticles is reported. A combination of low temperature (190 °C) microwave synthesis and hydrothermal method were used to prepare phase pure material with excellent yield (95%). The magnetic separability, surface area of 41 m{sup 2}/g and visible light absorption make ZnFe{sub 2}O{sub 4}@ZnO nanoparticles a good solar photocatalyst. ZnFe{sub 2}O{sub 4}@ZnO displayed greater UV photocatalytic efficiency than ZnO owing to the generation of large number of electron-hole pairs. Visible light photodegradation of MO using ZnFe{sub 2}O{sub 4}@ZnO nanoparticles is reported for the first time. Higher first order rate constants under both UV and visible light for core-shell nanoparticles suggested their superiority over its individual oxides. The ZnFe{sub 2}O{sub 4}@ZnO showed excellent reusability with high photocatalytic efficiencies suggesting its suitability for solar photocatalytic applications.

Authors:
; ; ;
Publication Date:
OSTI Identifier:
22581528
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 77; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; ELECTRONS; FERRATES; HOLES; HYDROTHERMAL SYNTHESIS; METHYL ORANGE; MICROWAVE RADIATION; NANOPARTICLES; PHOTOCATALYSIS; REACTION KINETICS; SURFACE AREA; SURFACES; TEMPERATURE DEPENDENCE; VISIBLE RADIATION; ZINC OXIDES

Citation Formats

Kulkarni, Suresh D., E-mail: suresh.dk@manipal.edu, Kumbar, Sagar, Menon, Samvit G., Choudhari, K. S., and Santhosh, C. Magnetically separable core–shell ZnFe{sub 2}O{sub 4}@ZnO nanoparticles for visible light photodegradation of methyl orange. United States: N. p., 2016. Web. doi:10.1016/J.MATERRESBULL.2016.01.022.
Kulkarni, Suresh D., E-mail: suresh.dk@manipal.edu, Kumbar, Sagar, Menon, Samvit G., Choudhari, K. S., & Santhosh, C. Magnetically separable core–shell ZnFe{sub 2}O{sub 4}@ZnO nanoparticles for visible light photodegradation of methyl orange. United States. https://doi.org/10.1016/J.MATERRESBULL.2016.01.022
Kulkarni, Suresh D., E-mail: suresh.dk@manipal.edu, Kumbar, Sagar, Menon, Samvit G., Choudhari, K. S., and Santhosh, C. Sun . "Magnetically separable core–shell ZnFe{sub 2}O{sub 4}@ZnO nanoparticles for visible light photodegradation of methyl orange". United States. https://doi.org/10.1016/J.MATERRESBULL.2016.01.022.
@article{osti_22581528,
title = {Magnetically separable core–shell ZnFe{sub 2}O{sub 4}@ZnO nanoparticles for visible light photodegradation of methyl orange},
author = {Kulkarni, Suresh D., E-mail: suresh.dk@manipal.edu and Kumbar, Sagar and Menon, Samvit G. and Choudhari, K. S. and Santhosh, C.},
abstractNote = {Highlights: • Phase pure, magnetic ZnFe{sub 2}O{sub 4}@ZnO nanoparticles synthesized with excellent yield. • ZnFe{sub 2}O{sub 4}@ZnO displayed higher UV photocatalytic efficiency than ZnO nanoparticles. • First report on visible light photodegradation of methyl orange by ZnFe{sub 2}O{sub 4}@ZnO. • Excellent reusability of ZnFe{sub 2}O{sub 4}@ZnO nanoparticles observed for azo dye removal. - Abstract: Visible light photodegradation of aqueous methyl orange using magnetically separable core–shell ZnFe{sub 2}O{sub 4}@ZnO nanoparticles is reported. A combination of low temperature (190 °C) microwave synthesis and hydrothermal method were used to prepare phase pure material with excellent yield (95%). The magnetic separability, surface area of 41 m{sup 2}/g and visible light absorption make ZnFe{sub 2}O{sub 4}@ZnO nanoparticles a good solar photocatalyst. ZnFe{sub 2}O{sub 4}@ZnO displayed greater UV photocatalytic efficiency than ZnO owing to the generation of large number of electron-hole pairs. Visible light photodegradation of MO using ZnFe{sub 2}O{sub 4}@ZnO nanoparticles is reported for the first time. Higher first order rate constants under both UV and visible light for core-shell nanoparticles suggested their superiority over its individual oxides. The ZnFe{sub 2}O{sub 4}@ZnO showed excellent reusability with high photocatalytic efficiencies suggesting its suitability for solar photocatalytic applications.},
doi = {10.1016/J.MATERRESBULL.2016.01.022},
url = {https://www.osti.gov/biblio/22581528}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 77,
place = {United States},
year = {2016},
month = {5}
}