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Title: Preparation of magnetic photocatalyst nanoparticles—TiO{sub 2}/SiO{sub 2}/Mn–Zn ferrite—and its photocatalytic activity influenced by silica interlayer

Abstract

Highlights: ► TiO{sub 2}/SiO{sub 2}/Mn–Zn ferrite acts as magnetic photocatalyst nanoparticle. ► SiO{sub 2} interlayer is used to prevent electron migration between photocatalyst and magnetic core. ► TiO{sub 2}/Mn–Zn ferrite without SiO{sub 2} interlayer shows poor magnetic and photocatalytic property. -- Abstract: A magnetic photocatalyst, TiO{sub 2}/SiO{sub 2}/Mn–Zn ferrite, was prepared by stepwise synthesis involving the co-precipitation of Mn–Zn ferrite as a magnetic core, followed by a coating of silica as the interlayer, and titania as the top layer. The particle size and distribution of magnetic nanoparticles were found to depend on the addition rate of reagent and dispersing rate of reaction. The X-ray diffractometer and transmission electron microscope were used to examine the crystal structures and the morphologies of the prepared composites. Vibrating sample magnetometer was also used to reveal their superparamagnetic property. The UV–Vis spectrophotometer was employed to monitor the decomposition of methylene blue in the photocatalytic efficient study. It was found that at least a minimum thickness of the silica interlayer around 20 nm was necessary for the inhibition of electron transference initiated by TiO{sub 2} and Mn–Zn ferrite.

Authors:
 [1]; ; ;  [1]
  1. National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Rd., Klong 1, Klong Luang, Patumthani 12120 (Thailand)
Publication Date:
OSTI Identifier:
22215117
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 6; Other Information: Copyright (c) 2012 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; 77 NANOSCIENCE AND NANOTECHNOLOGY; CRYSTAL STRUCTURE; DECOMPOSITION; FERRITE; FERRITES; MAGNET CORES; MAGNETIC CORES; MAGNETIC PROPERTIES; METHYLENE BLUE; NANOSTRUCTURES; PHOTOCATALYSIS; SILICA; SILICON OXIDES; SUPERPARAMAGNETISM; SYNTHESIS; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; VIBRATING SAMPLE MAGNETOMETERS; X-RAY DIFFRACTOMETERS

Citation Formats

Laohhasurayotin, Kritapas, E-mail: kritapas@nanotec.or.th, Pookboonmee, Sudarat, Viboonratanasri, Duangkamon, and Kangwansupamonkon, Wiyong. Preparation of magnetic photocatalyst nanoparticles—TiO{sub 2}/SiO{sub 2}/Mn–Zn ferrite—and its photocatalytic activity influenced by silica interlayer. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.02.030.
Laohhasurayotin, Kritapas, E-mail: kritapas@nanotec.or.th, Pookboonmee, Sudarat, Viboonratanasri, Duangkamon, & Kangwansupamonkon, Wiyong. Preparation of magnetic photocatalyst nanoparticles—TiO{sub 2}/SiO{sub 2}/Mn–Zn ferrite—and its photocatalytic activity influenced by silica interlayer. United States. doi:10.1016/J.MATERRESBULL.2012.02.030.
Laohhasurayotin, Kritapas, E-mail: kritapas@nanotec.or.th, Pookboonmee, Sudarat, Viboonratanasri, Duangkamon, and Kangwansupamonkon, Wiyong. Fri . "Preparation of magnetic photocatalyst nanoparticles—TiO{sub 2}/SiO{sub 2}/Mn–Zn ferrite—and its photocatalytic activity influenced by silica interlayer". United States. doi:10.1016/J.MATERRESBULL.2012.02.030.
@article{osti_22215117,
title = {Preparation of magnetic photocatalyst nanoparticles—TiO{sub 2}/SiO{sub 2}/Mn–Zn ferrite—and its photocatalytic activity influenced by silica interlayer},
author = {Laohhasurayotin, Kritapas, E-mail: kritapas@nanotec.or.th and Pookboonmee, Sudarat and Viboonratanasri, Duangkamon and Kangwansupamonkon, Wiyong},
abstractNote = {Highlights: ► TiO{sub 2}/SiO{sub 2}/Mn–Zn ferrite acts as magnetic photocatalyst nanoparticle. ► SiO{sub 2} interlayer is used to prevent electron migration between photocatalyst and magnetic core. ► TiO{sub 2}/Mn–Zn ferrite without SiO{sub 2} interlayer shows poor magnetic and photocatalytic property. -- Abstract: A magnetic photocatalyst, TiO{sub 2}/SiO{sub 2}/Mn–Zn ferrite, was prepared by stepwise synthesis involving the co-precipitation of Mn–Zn ferrite as a magnetic core, followed by a coating of silica as the interlayer, and titania as the top layer. The particle size and distribution of magnetic nanoparticles were found to depend on the addition rate of reagent and dispersing rate of reaction. The X-ray diffractometer and transmission electron microscope were used to examine the crystal structures and the morphologies of the prepared composites. Vibrating sample magnetometer was also used to reveal their superparamagnetic property. The UV–Vis spectrophotometer was employed to monitor the decomposition of methylene blue in the photocatalytic efficient study. It was found that at least a minimum thickness of the silica interlayer around 20 nm was necessary for the inhibition of electron transference initiated by TiO{sub 2} and Mn–Zn ferrite.},
doi = {10.1016/J.MATERRESBULL.2012.02.030},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 6,
volume = 47,
place = {United States},
year = {2012},
month = {6}
}