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Title: Study of Cu 2O particle morphology on microwave field enhancement

Abstract

The dielectric enhancement and modulation of a cuprous oxide (Cu 2O) microwave-active catalyst material is investigated from an experimental and computational point of view. Experimental synthesis of two particle morphologies that included a cube and spike were carried out using an EDTA hydrothermal synthesis method. The permittivity for the spiked particles at low volume fraction in a paraffin composite exhibited a 20% increase when compared to the cube-shaped particles at the same volume fraction. Using a finite difference time domain (FDTD) simulation, the improvement in permittivity was attributed to the enhanced electric field near the tip of the spike particles and the neighboring interaction at higher volume fractions. The increased electric field at the tips of the particles induces a change in polarizability (dipole density) within the matrix material, which increases the effective dielectric properties of the composite. Moreover, it was determined that an electrically conductive particle within a high permittivity matrix material is advantageous for generating high localized electric fields that can be utilized for microwave-assisted catalytic reactions.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. National Energy Technology Lab. (NETL), Morgantown, WV (United States); West Virginia Univ., Morgantown, WV (United States); Oak Ridge Institute of Science and Education, Oak Ridge, TN (United States)
  2. National Energy Technology Lab. (NETL), Morgantown, WV (United States); Oak Ridge Institute of Science and Education, Oak Ridge, TN (United States)
  3. SUNY Polytechnic Institute College of Nanoscale Engineering and Technology Innovation, Albany, NY (United States)
  4. West Virginia Univ., Morgantown, WV (United States); Oak Ridge Institute of Science and Education, Oak Ridge, TN (United States)
  5. National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1482826
Alternate Identifier(s):
OSTI ID: 1546098
Report Number(s):
NETL-PUB-21778
Journal ID: ISSN 0254-0584; PII: S0254058418304644
Resource Type:
Accepted Manuscript
Journal Name:
Materials Chemistry and Physics
Additional Journal Information:
Journal Volume: 216; Journal Issue: C; Journal ID: ISSN 0254-0584
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Microwave-assisted catalysis; Cu2o; FDTD; Particle morphology

Citation Formats

Musho, T. D., Wildfire, C., Houlihan, N. M., Sabolsky, E. M., and Shekhawat, D. Study of Cu2O particle morphology on microwave field enhancement. United States: N. p., 2018. Web. doi:10.1016/j.matchemphys.2018.05.059.
Musho, T. D., Wildfire, C., Houlihan, N. M., Sabolsky, E. M., & Shekhawat, D. Study of Cu2O particle morphology on microwave field enhancement. United States. doi:10.1016/j.matchemphys.2018.05.059.
Musho, T. D., Wildfire, C., Houlihan, N. M., Sabolsky, E. M., and Shekhawat, D. Thu . "Study of Cu2O particle morphology on microwave field enhancement". United States. doi:10.1016/j.matchemphys.2018.05.059. https://www.osti.gov/servlets/purl/1482826.
@article{osti_1482826,
title = {Study of Cu2O particle morphology on microwave field enhancement},
author = {Musho, T. D. and Wildfire, C. and Houlihan, N. M. and Sabolsky, E. M. and Shekhawat, D.},
abstractNote = {The dielectric enhancement and modulation of a cuprous oxide (Cu2O) microwave-active catalyst material is investigated from an experimental and computational point of view. Experimental synthesis of two particle morphologies that included a cube and spike were carried out using an EDTA hydrothermal synthesis method. The permittivity for the spiked particles at low volume fraction in a paraffin composite exhibited a 20% increase when compared to the cube-shaped particles at the same volume fraction. Using a finite difference time domain (FDTD) simulation, the improvement in permittivity was attributed to the enhanced electric field near the tip of the spike particles and the neighboring interaction at higher volume fractions. The increased electric field at the tips of the particles induces a change in polarizability (dipole density) within the matrix material, which increases the effective dielectric properties of the composite. Moreover, it was determined that an electrically conductive particle within a high permittivity matrix material is advantageous for generating high localized electric fields that can be utilized for microwave-assisted catalytic reactions.},
doi = {10.1016/j.matchemphys.2018.05.059},
journal = {Materials Chemistry and Physics},
number = C,
volume = 216,
place = {United States},
year = {2018},
month = {5}
}

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