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Magnetic Field Assisted Growth of High Dense Hematite Nanosheets and Their Application in Water Treatment

[+] Author Affiliations
Dong Lin, Biwei Deng, Gary J. Cheng

Purdue University, West Lafayette, IN

Paper No. MSEC2014-3958, pp. V001T03A005; 7 pages
doi:10.1115/MSEC2014-3958
From:
  • ASME 2014 International Manufacturing Science and Engineering Conference collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference
  • Volume 1: Materials; Micro and Nano Technologies; Properties, Applications and Systems; Sustainable Manufacturing
  • Detroit, Michigan, USA, June 9–13, 2014
  • Conference Sponsors: Manufacturing Engineering Division
  • ISBN: 978-0-7918-4580-6
  • Copyright © 2014 by ASME

abstract

This paper describes an approach combining thermal stress and magnetic force in order to generate α-Fe2O3 nanosheets on the surface of various iron substrates that include plate and powder and their application of nanosheets on water treatment. A typical procedure involved the thermal oxidation of these substrates on the hot plate with magnetic field in air and with fixed temperature of 500°C for different times. A possible mechanism — magnetic force adding on iron ions — was proposed to explain the growth of nanosheet at the width direction. Electron microscopic studies indicate that these nanosheets show a parabolic relation with time of thermal oxidation for the growth at width direction. A comparison of heavy metal (As, Cr) ion adsorption effect of nanosheets and nanowires was also investiged, which show that nanosheets have a much better adsorption ratio than nanowires.

Copyright © 2014 by ASME

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