Decomposition of MOFs for the preparation of nanoporous Co 3 O 4 fibres and sheets with excellent microwave absorption and photocatalytic properties.

Unique nanoporous Co ₃ O ₄ fibres and sheets were successfully fabricated via a facile hydrothermal route (150 °C) and subsequent annealing process at 500 °C in air. The excellent microwave absorption of the nanoporous Co ₃ O ₄ materials originates not only from the dielectric loss and impedance matching, but also from geometrical effects. Herein, the photocatalytic behavior of the as-prepared Co ₃ O ₄ has also been reported based on the degradation of methylene blue (MB) dye in an aqueous medium under simulated solar light.