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Sol-Gel Synthesis of Nanocrystalline Ni-Ferrite and Co-Ferrite Redox Materials for Thermochemical Production of Solar Fuels

Published online by Cambridge University Press:  11 September 2014

Rahul R. Bhosale ,
Ivo Alxneit ,
Leo L. P. van den Broeke ,
Anand Kumar ,
Mehak Jilani ,
Shahd Samir Gharbia ,
Jamila Folady  and
Dareen Zuhir Dardor
Rahul R. Bhosale
Affiliation:
Department of Chemical Engineering, Qatar University, Doha, Qatar.
Ivo Alxneit
Affiliation:
Solar Technology Laboratory, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
Leo L. P. van den Broeke
Affiliation:
Department of Chemical Engineering, Qatar University, Doha, Qatar.
Anand Kumar
Affiliation:
Department of Chemical Engineering, Qatar University, Doha, Qatar.
Mehak Jilani
Affiliation:
Department of Chemical Engineering, Qatar University, Doha, Qatar.
Shahd Samir Gharbia
Affiliation:
Department of Chemical Engineering, Qatar University, Doha, Qatar.
Jamila Folady
Affiliation:
Department of Chemical Engineering, Qatar University, Doha, Qatar.
Dareen Zuhir Dardor
Affiliation:
Department of Chemical Engineering, Qatar University, Doha, Qatar.
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Abstract

In this contribution, we report the synthesis and characterization of NixFe3-xO4 and CoxFe3-xO4 redox nanomaterials using sol-gel method. These materials will be used to produce solar fuels such as H2 or syngas from H2O and/or CO2 via solar thermochemical cycles (STCs). For the sol-gel synthesis of ferrites, the Ni, Co, Fe precursor salts were dissolved in ethanol and propylene oxide (PO) was added dropwise to the well mixed solution as a gelation agent to achieve gel formation. Freshly synthesized gels were aged, dried, and calcined by heating them to 600°C in air. The calcined powders were characterized by powder x-ray diffractometer (XRD), BET surface area, as well as scanning (SEM) and transmission (TEM) electron microscopy. Their suitability to be used in STCs for the production of solar fuels was assessed by performing several reduction/re-oxidation cycles using a thermogravimetric analyzer (TGA).

Keywords

sol-gelnanostructurethermogravimetric analysis (TGA)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1675: Symposium K/RR – Synthesis, Characterization and Applications of Functional Materials—Thin Films and Nanostructures , 2014 , pp. 203 - 208
Copyright
Copyright © Materials Research Society 2014 

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References

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