Issue 21, 2013
From the journal:

RSC Advances

More stable structures lead to improved cycle stability in photocatalysis and Li-ion batteries†

Wei Zhou,a   Lijuan Lin,a   Wei Wei,a   Hong Jin,a   Jinghong Li*b  and  Lin Guo*a  

* Corresponding authors

a School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China
E-mail: guolin@buaa.edu.cn
Fax: +86 10 82338162
Tel: +86 10 82338162

b Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Tsinghua University, Beijing, 100084, P. R. China
E-mail: jhli@mail.tsinghua.edu.cn

Abstract

A simple combustion method was used to synthesize stable network-like nanostructures. Take two kinds of iron oxides for example. The Fe2O3 network nanocrystal with an average diameter of 50 nm composed of Fe grains ∼5–10 nm in diameter was firstly obtained. It showed an enhanced photocatalysis and cycle stability (∼50% after 4 cycles) compared with the commercial NPs (only 24% after 3 cycles) in the degradation of RhB. The structure of the sample could remain even after 4 photocatalytic cycles, explaining why the sample had an improved cyclability. Next, Fe3O4/C network nanostructure was synthesized using Fe2O3 sample as precursor. One Fe3O4 sample with the thickest carbon layers (∼8 nm) was more stable, compared to other two samples with ∼2 nm and ∼5 nm carbon layers. The related HRTEM image exhibited the outer layers of the sample had become onion-like structure from amorphous carbon, explaining an excellent performance of a capacity of 400 mAh g−1 after 90 cycles even at a high current rate of 2 C. These two kinds of iron oxide with stable network-like nanostructure by combustion method showed probable applications in photocatalytic and electrochemical fields.

Graphical abstract: More stable structures lead to improved cycle stability in photocatalysis and Li-ion batteries

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Supplementary files

Article information

DOI
https://doi.org/10.1039/C3RA23233F
Article type
Paper
Submitted
07 Dec 2012
Accepted
26 Feb 2013
First published
27 Feb 2013

RSC Adv., 2013,3, 7933-7937

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More stable structures lead to improved cycle stability in photocatalysis and Li-ion batteries

W. Zhou, L. Lin, W. Wei, H. Jin, J. Li and L. Guo, RSC Adv., 2013, 3, 7933 DOI: 10.1039/C3RA23233F

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