Abstract
A novel high efficiency visible photocatalyst TbMnO3@CeO2 composites was first synthesized by microwave-assisted acrylamide gel method. The phase purity, surface morphology, optical, magnetic, photoluminescent and photocatalytic properties of TbMnO3, CeO2 and TbMnO3@CeO2 composites were compared. The average particle sizes for the TbMnO3, CeO2 and TbMnO3@CeO2 composites are estimated to be 80, 55 and 70 nm, respectively. After the introduction of CeO2 nanoparticles into the TbMnO3 precursor, the light absorption capacity is enhanced, while the energy band (Eg) value is greatly reduced. TbMnO3@CeO2 composites exhibits enhanced magnetic properties, low electron hole pair recombination rate and high photocatalytic activity for the degradation of MO under visible light irradiation. The high photocatalytic activity can be ascribed to the synergistic effect of light absorption capacity, the recombination rate of electron hole pairs and hydroxyl radicals.
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