One-Pot Synthesis of Cu_2O/Cu Self-Assembled Hollow Nanospheres with Enhanced Photocatalytic Performance

摘要

Cu_2O/Cu hollow spheres are prepared using one-pot template-free solvent-thermal synthesis route with (CH_3COO)2Cu·H_2O as a precursor.With the reaction time increasing gradually from 2 h to 20 h, themorphology of the Cu_2O/Cu evolves from nanoparticle to hollow nanosphere.The hollow structure is obtained when the cooling rate falls down to 0.7°C/min. And the content of Cu in the hollow spheres also can be easily controlled by adjusting the solvent-thermal synthesis time. Using photocatalytic degradation of phenol as the probe molecules under visible-light illumination, we have investigated the influence of hollow structure on the photocatalytic activity of Cu_2O/Cu. The prepared hollow sphere Cu_2O/Cu particles exhibited a higher photodegradation capability than nanoparticles and solid spheres. When the content of Cu lies in the range of 11-86 wt%, the samples exhibit higher photocatalytic performance, indicating that the Cu_2O/Cu particles with hollow structure are promising candidates for the processing of pollutants.