Abstract
CuxO(x = 1,2)/amorphous compounds have been successfully synthesized by chemical free dealloying and spontaneous oxidation method. Technological parameters, such as the acid concentration and dealloying time strongly influence the crystal type, size and morphology of coppery oxide. The further study shows that with the increase of HCl concentration, the surface coverage rate of Cu2O micro-flowers increases and the sizes of Cu2O micro-flowers get bigger. Moreover, it is observed that cracks are formed on the etched ribbon surface and plentiful Cu2O/CuO particles grow up from these crack walls if the dealloying time extends to long enough. Considering many fascinating properties of Cu2O/CuO particles and the amorphous alloy carrier, potential application fields of these amazing compounds will be developed in future.
Highlights
Dealloying, which refers to the selective dissolution of one or more components out of an alloy, is superior in the fabrication of nanoporous metals with open pores owing to its high reactivity of some alloying elements and controllability of chemical reactions[1]
We develop a new approach to produce Cu2O/amorphous compounds by free dealloying Cu-based amorphous alloys and spontaneous oxidation method
The most important contribution by this work is to produce the amazing compounds with multiple properties which are hopeful to be applied in broad fields in future
Summary
Dealloying, which refers to the selective dissolution of one or more components out of an alloy, is superior in the fabrication of nanoporous metals with open pores owing to its high reactivity of some alloying elements and controllability of chemical reactions[1]. This method has been successfully adopted in the fabrication of nanoporous noble metals in different alloy systems[2,3,4]. Some studies reveal that dealloying method can be extended to the fabrication of metal oxide nanostructures with intricate structural properties.
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