Abstract
A flower-like CuO film on a Cu foil substrate has been synthesized via a facile one-step solution route at room temperature, using NaOH and (NH4)2S2O8 as raw materials. Formation mechanism of the flower-like CuO assembled by nanosheets has been studied systematically based on series of control experiments. The optical property, photodegradation activity to a methyl blue (MB) solution and electrochemical sensing properties of the as-prepared flower-like CuO film have also been investigated. The experimental results support that the flower-like CuO was formed underwent the following processes: Cu(OH)2 nanorods→Cu(OH)2 nanotubes→CuO nanosheets→flower-like CuO assembled by nanosheets. The flower-like CuO film exhibits an excellent photocatalytic activity to a MB solution with a high concentration. The electrochemical measurements show that the as-prepared flower-like CuO film can be used directly as a working electrode with a low detecting limit, good stability and selectivity to ascorbic acid (AA) solutions.
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