Hydrothermal synthesis and electrochemical properties of urchin-like core-shell copper oxide nanostructures

Jiang Ying Li, Shenglin Xiong, Jun Pan, Yitai Qian*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

Urchin-like core-shell CuO assembled by closely packed nanorods with a diameter of 10 nm has been hydrothermally synthesized in assistance of poly(ethylene glycol) (PEG) at 100°C for 10 h. HRTEM image shows that the diameter of the inner core is ∼1.5 μm and that of the outer shell is ∼2 μm. Control experiments run at different temperature indicate that higher temperature than 100°C results in the outer shell consisting of particles and blocks of different size and lower temperature gains no products. According to the 2 and 18 h reaction results, PEG plays two important roles in the construction of the core-shell urchin-like structure: the stabilization from the hydrocarbon chain to prolong the lifetime of Cu(OH)2 and the passivation to the lateral surfaces of the nanorods. The as-prepared CuO with a core-shell urchin-like structure exhibits wide biosensor capability toward H2O2 with a linear response in the concentration ranging from 10 μM to 5.55 mM.

Original languageEnglish (US)
Pages (from-to)9645-9650
Number of pages6
JournalJournal of Physical Chemistry C
Volume114
Issue number21
DOIs
StatePublished - Jun 3 2010
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

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