Photodegradation of methyl orange under visible light by micro-nano hierarchical Cu 2O structure fabricated by hybrid laser processing and chemical dealloying

Changsheng Dong, Minlin Zhong, Ting Huang, Mingxing Ma, Dirk Wortmann, Mihael Brajdic, Ingomar Kelbassa

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)

Abstract

Micro-nano hierarchical structure on the substrate was fabricated by a hybrid approach including laser deposition, laser ablation and chemical dealloying. The structure consists of micro bumps with a width of 50 μm and a height of 100 μm, and nanoporous structures with a size of 70-150 nm on the micro bumps. XRD and XPS results confirm that these hierarchical structures were made of Cu 2O. For use in comparison, three additional structures with feature size in milliscale, microscale, and nanoscale were also prepared respectively by the proposed methods. Under visible light, the micro-nano structure exhibited the best performance of photodegradation. It is the result of the large specific surface and the catalytic reaction driven by the cuprous oxides.

Original languageEnglish
Pages (from-to)4332-4338
Number of pages7
JournalACS Applied Materials and Interfaces
Volume3
Issue number11
DOIs
Publication statusPublished - 2011 Nov 23
Externally publishedYes

Keywords

  • dealloying
  • laser ablation
  • micro-nano hierarchical structure
  • photo degradation

ASJC Scopus subject areas

  • Materials Science(all)

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