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Ultradispersed Cobalt Ferrite Nanoparticles Assembled in Graphene Aerogel for Continuous Photo-Fenton Reaction and Enhanced Lithium Storage Performance
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Ultradispersed Cobalt Ferrite Nanoparticles Assembled in Graphene Aerogel for Continuous Photo-Fenton Reaction and Enhanced Lithium Storage Performance
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Journal Article
Ultradispersed Cobalt Ferrite Nanoparticles Assembled in Graphene Aerogel for Continuous Photo-Fenton Reaction and Enhanced Lithium Storage Performance
2016
Overview
The Photo-Fenton reaction is an advanced technology to eliminate organic pollutants in environmental chemistry. Moreover, the conversion rate of Fe
3+
/Fe
2+
and utilization rate of H
2
O
2
are significant factors in Photo-Fenton reaction. In this work, we reported three dimensional (3D) hierarchical cobalt ferrite/graphene aerogels (CoFe
2
O
4
/GAs) composites by the
in situ
growing CoFe
2
O
4
crystal seeds on the graphene oxide (GO) followed by the hydrothermal process. The resulting CoFe
2
O
4
/GAs composites demonstrated 3D hierarchical pore structure with mesopores (14~18 nm), macropores (50~125 nm), and a remarkable surface area (177.8 m
2
g
−1
). These properties endowed this hybrid with the high and recyclable Photo-Fenton activity for methyl orange pollutant degradation. More importantly, the CoFe
2
O
4
/GAs composites can keep high Photo-Fenton activity in a wide pH. Besides, the CoFe
2
O
4
/GAs composites also exhibited excellent cyclic performance and good rate capability. The 3D framework can not only effectively prevent the volume expansion and aggregation of CoFe
2
O
4
nanoparticles during the charge/discharge processes for Lithium-ion batteries (LIBs), but also shorten lithium ions and electron diffusion length in 3D pathways. These results indicated a broaden application prospect of 3D-graphene based hybrids in wastewater treatment and energy storage.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 140/146
/ Cobalt
/ Graphene
/ Humanities and Social Sciences
/ Hybrids
/ Lithium
/ Nitrates
/ Nitrogen
/ Scanning electron microscopy
/ Science
