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The precursor of NiO-Co3O4 composites was synthesized via a simple hydrothermal process. After that, the precursor was calcined at 300°C for 3h to obtain the composite powders. The powders calcined at 300°C showed amorphous, and the powders calcined at 400°C and 500°C for comparison showed the composite phase of NiO and Co3O4. The composite products showed a microstructure of micro-spheres. For the...
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