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Hierarchical Fe 3 O 4-reduced graphene oxide nanocomposite grown on NaCl crystals for triiodide reduction in dye-sensitized solar cells

Hierarchical Fe 3 O 4-reduced graphene oxide nanocomposite grown on NaCl crystals for triiodide reduction in dye-sensitized solar cells

Viyada Harnchana, Sujinda Chaiyachad, Samuk Pimanpang, Chatree Saiyasombat, Pornjuk Srepusharawoot, Vittaya Amornkitbamrung

Sci Rep. 2019 Feb 6;9(1):1494.

PMID: 30728432

Abstract:

Cost-effective reduced graphene oxide sheets decorated with magnetite (Fe3O4) nanoparticles (Fe3O4-rGO) are successfully fabricated via a chemical vapor deposition (CVD) technique using iron (III) nitrate as an iron precursor, with glucose and CH4 as carbon sources, and NaCl as a supporting material. TEM analysis and Raman spectroscopy reveal hierarchical nanostructures of reduced graphene oxide (rGO) decorated with Fe3O4 nanoparticles. Fe K-edge x-ray absorption near edge structure (XANES) spectra confirm that the nanoparticles are Fe3O4 with a slight shift of the pre-edge peak position toward higher energy suggesting that the fabricated Fe3O4 nanoparticles have a higher average oxidation state than that of a standard Fe3O4 compound. The hierarchical Fe3O4-rGO is found to exhibit an excellent catalytic activity toward the reduction of triiodide to iodide in a dye-sensitized solar cell (DSSC) and can deliver a solar cell efficiency of 6.65%, which is superior to a Pt-based DSSC (6.37%).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS71754	Pt/reduced graphene oxide nanocomposite			Price
LS71756	Fe3O4/reduced graphene oxide nanocomposite			Price

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