Facile synthesis of graphene-like copper oxide nanofilms with enhanced electrochemical and photocatalytic properties in energy and environmental applications

Yang Lu, Xianming Liu, Kangwen Qiu, Jinbing Cheng, Weixiao Wang, Hailong Yan, Chengchun Tang, Jang Kyo Kim, Yongsong Luo

Research output: Contribution to journalArticlepeer-review

88 Scopus citations

Abstract

Novel graphene-like CuO nanofilms are grown on a copper foam substrate by in situ anodization for multifunctional applications as supercapacitor electrodes and photocatalysts for the degradation of dye pollutants. The as-prepared CuO consists of interconnected, highly crystalline, conductive CuO nanosheets with hierarchical open mesopores and a large surface area. The CuO nanofilms supported on a copper foam are employed as freestanding, binder-free electrodes for supercapacitors, which exhibit wonderful electrochemical performance with a large specific capacitance (919 F g-1 at 1 A g-1), an excellent cycling stability (7% capacitance loss after 5000 cycles), and a good rate capability (748 F g-1 at 30 A g-1). The porous CuO nanofilms also demonstrate excellent photocatalytic activities for degradation of methylene blue, with a degradation rate 99% much higher than 54% of the commercial CuO powders after 60 min. This excellent energy storage and photocatalytic performance of the graphene-like CuO nanofilms can open a new avenue for large-scale applications in energy and environmental fields.

Original languageBritish English
Pages (from-to)9682-9690
Number of pages9
JournalACS Applied Materials and Interfaces
Volume7
Issue number18
DOIs
StatePublished - 13 May 2015

Keywords

  • anodization
  • copper oxide
  • graphene-like nanofilms
  • photocatalyst
  • supercapacitor electrode

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