Controllable synthesis of WO3/Co1-δWO4 composite nanopowders for photocatalytic degradation of methylene blue (MB)

Systematical design and controllable synthesis of nanometer heterogeneous structure have attracted much attention in the photocatalytic field. The tungsten oxide/cobalt tungstate (WO 3 /Co 1-δ WO 4 ) nanoparticles with heterogeneous interface were synthesized by co-precipitation process. The XRD pat...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2022-06, Vol.24 (6), Article 116
Main Authors: Tan, Guolong, Mishra, Debesh D., Kumar, Ashwini, Sharma, Poorva
Format: Article
Language:English
Subjects:
Absorption spectra
Carbon dioxide
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cobalt
Conduction bands
Diffraction patterns
Dyes
Efficiency
Electron density
Heterogeneous structure
Inorganic Chemistry
Lasers
Light
Materials Science
Methylene blue
Nanocrystals
Nanoparticles
Nanotechnology
Optical Devices
Optics
Photocatalysis
Photodegradation
Photoluminescence
Photonics
Photons
Physical Chemistry
Pollutants
Research Paper
Semiconductors
Spectrum analysis
Synthesis
Tungsten
Tungsten oxide
Tungsten oxides
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Summary:Systematical design and controllable synthesis of nanometer heterogeneous structure have attracted much attention in the photocatalytic field. The tungsten oxide/cobalt tungstate (WO 3 /Co 1-δ WO 4 ) nanoparticles with heterogeneous interface were synthesized by co-precipitation process. The XRD pattern shows shifts of diffraction peaks of CoWO 4 to lower angle side, implying the deficient of Co 2+ in the lattice. The internal field across the heterogeneous structure transfers the photon-generated electrons from the conduction band of WO 3 to that of Co 1-δ WO 4 . The enhancement of the electron density greatly improves the photoluminescence emission intensity at a magnitude of around 2 × 10 6 in comparison with that of pure WO 3 or CoWO 4 . The photocatalytic efficiency was inspected by exposing the methylene blue (MB) mixing with 1% WO 3 /Co 1-δ WO 4 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. Graphical abstract
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-022-05506-3