Abstract
Systematical design and controllable synthesis of nanometer heterogeneous structure have attracted much attention in the photocatalytic field. The tungsten oxide/cobalt tungstate (WO3/Co1-δWO4) nanoparticles with heterogeneous interface were synthesized by co-precipitation process. The XRD pattern shows shifts of diffraction peaks of CoWO4 to lower angle side, implying the deficient of Co2+ in the lattice. The internal field across the heterogeneous structure transfers the photon-generated electrons from the conduction band of WO3 to that of Co1-δWO4. The enhancement of the electron density greatly improves the photoluminescence emission intensity at a magnitude of around 2 × 106 in comparison with that of pure WO3 or CoWO4. The photocatalytic efficiency was inspected by exposing the methylene blue (MB) mixing with 1% WO3/Co1-δWO4 nanopowders to the visible light for degradation. The main optical absorption band of MB at 664 nm decays from 2.35 to 0.04 cm−1 after photo-degradation for 3.5 h, suggesting excellent photocatalytic performance.
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This work was financially supported by the National Natural Science Foundation of China under contract of No. 11774276 and Sichuan Science and Technology Program (2022YFG0265).
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Tan, G., Mishra, D.D., Kumar, A. et al. Controllable synthesis of WO3/Co1-δWO4 composite nanopowders for photocatalytic degradation of methylene blue (MB). J Nanopart Res 24, 116 (2022). https://doi.org/10.1007/s11051-022-05506-3
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DOI: https://doi.org/10.1007/s11051-022-05506-3