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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