Facile fabrication of Ti supported CuO film composed of bamboo-leaf-like nanosheets and their high catalytic performance in the oxidative degradation of methylene blue with hydrogen peroxide

• Nanostructured CuO film composed of bamboo-leaf-like CuO nanosheets are prepared.
• The CuO film exhibits high activity in the degradation of methylene blue with H2O2.
• The CuO film catalyst exhibits good reusability and high stability.
• The high catalytic performance of CuO film is related to its special nanostructure.

The design and preparation of heterogeneous Fenton-like catalysts with high catalytic activity and good reusability is a very important task in the field of environmental catalysis. In this work, nanostructured CuO film composed of bamboo-leaf-like CuO nanosheets supported on Ti substrate was synthesized by a facile solution-chemistry method. When the as-prepared CuO film acted as a catalyst, the oxidative degradation of methylene blue (MB) with H2O2 followed the pseudo-first order kinetics and the rate constant could reach 0.0906 min−1 at 30 °C, which was 6.6 times larger than the rate constant of MB degradation catalyzed by commercial CuO nanoparticles. The apparent activation energy of MB degradation was ca. 26.2 kJ mol−1. After 6 successive catalytic cycles, the as-prepared CuO film still remained its original catalytic activity, exhibiting much better reusability and durability than recently reported heterogeneous Fenton-like catalysts.

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