Photodegradation of methyl orange under visible light by micro-nano hierarchical Cu2O structure fabricated by hybrid laser processing and chemical dealloying.
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(2)O. 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.
Key Laboratory for Advanced Material Processing Technology, Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China.
Changsheng
C
Dong
Minlin
M
Zhong
Ting
T
Huang
Mingxing
M
Ma
Dirk
D
Wortmann
Mihael
M
Brajdic
Ingomar
I
Kelbassa