Ambient aqueous growth of Cu2Te nanostructures with excellent electrocatalytic activity toward sulfide redox shuttles

Han, Chao, Bai, Yang, Sun, Qiao, Zhang, Shaohua, Li, Zhen, Wang, Lianzhou and Dou, Shixue (2016) Ambient aqueous growth of Cu2Te nanostructures with excellent electrocatalytic activity toward sulfide redox shuttles. Advanced Science, 3 5: 1500350.1-1500350.11. doi:10.1002/advs.201500350


Author Han, Chao
Bai, Yang
Sun, Qiao
Zhang, Shaohua
Li, Zhen
Wang, Lianzhou
Dou, Shixue
Title Ambient aqueous growth of Cu2Te nanostructures with excellent electrocatalytic activity toward sulfide redox shuttles
Formatted title
Ambient aqueous growth of Cu2Te nanostructures with excellent electrocatalytic activity toward sulfide redox shuttles
Journal name Advanced Science   Check publisher's open access policy
ISSN 2198-3844
Publication date 2016-02-03
Year available 2016
Sub-type Article (original research)
DOI 10.1002/advs.201500350
Open Access Status DOI
Volume 3
Issue 5
Start page 1500350.1
End page 1500350.11
Total pages 11
Place of publication Weinheim, Germany
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
Language eng
Subject 2701 Medicine (miscellaneous)
1500 Chemical Engineering
2500 Materials Science
1301 Biochemistry, Genetics and Molecular Biology (miscellaneous)
2200 Engineering
3100 Physics and Astronomy
Abstract A new aqueous and scalable strategy to synthesize surfactant-free CuTe nanotubes and nanosheets at room temperature has been developed. In aqueous solution, CuE (E = O, S, Se) nanoparticles can be easily transformed into CuTe nanosheets and nanotubes via a simple anion exchange reaction under ambient conditions. The formation of CuTe nanosheets is ascribed to a novel exchange-peeling growth mechanism instead of simple Kirkendall effect; and the resultant nanosheets can be further rolled into nanotubes with assistance of stirring. The morphologies of CuTe nanosheets and nanotubes can be easily controlled by changing the synthesis parameters, such as the concentration of precursors, the size of nanoparticle precursor, and the amount of NaBH, as well as the stirring speed. Thus-formed CuTe nanostructures exhibit excellent catalytic activity toward sulfide redox shuttles and are exploited as counter electrodes catalysts for quantum dot sensitized solar cells. The performance of CuTe nanostructures strongly depends on their morphology, and the solar cells made with counter electrodes from CuTe nanosheets show the maximum power conversion efficiency of 5.35%.
Formatted abstract
A new aqueous and scalable strategy to synthesize surfactant-free Cu2Te nanotubes and nanosheets at room temperature has been developed. In aqueous solution, Cu2E (E = O, S, Se) nanoparticles can be easily transformed into Cu2Te nanosheets and nanotubes via a simple anion exchange reaction under ambient conditions. The formation of Cu2Te nanosheets is ascribed to a novel exchange-peeling growth mechanism instead of simple Kirkendall effect; and the resultant nanosheets can be further rolled into nanotubes with assistance of stirring. The morphologies of Cu2Te nanosheets and nanotubes can be easily controlled by changing the synthesis parameters, such as the concentration of precursors, the size of nanoparticle precursor, and the amount of NaBH4, as well as the stirring speed. Thus-formed Cu2Te nanostructures exhibit excellent catalytic activity toward sulfide redox shuttles and are exploited as counter electrodes catalysts for quantum dot sensitized solar cells. The performance of Cu2Te nanostructures strongly depends on their morphology, and the solar cells made with counter electrodes from Cu2Te nanosheets show the maximum power conversion efficiency of 5.35%.
Keyword Anion exchange
Copper chalcogenides
Electrocatalyst
Surfactant free
Catalytic activity
Nanostructure morphology
Power conversion efficiency
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 81471657
DP130102274
DP130102699
LP120200289
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
 
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