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Comparison of Photocatalytic Activity of Bi2WO6/TiO2 Nanotubes Heterostructures Composite under Multimode |
Author Name | Affiliation | E-mail | MA Feng-Yan | College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China | mafengyan989@163.com | YANG Yang | College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China | | LI Na | College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China | | YANG Qi-Lin | College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China | | LI Shang-Jin | College of Materials Science and Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China | | SHEN Lu-Yan | College of Materials Science and Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China | |
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Abstract: Bi2WO6/TiO2 nanotubes (Bi2WO6/TiO2-NTs) heterostructures composite were synthesized by multicom-ponent assembly approach combined with hydrothermal treatment employed TiO2 nanotubes as template. Multiple techniques such as X-ray powder diffraction (XRD), X-ray photo-electron spectroscopy (XPS), N2 adsorption-desorption, scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), and UV-Vis diffused absorption spectra (UV-Vis DRS) were applied to investigate the composition, structures, morphologies, optical and electronic properties of as-prepared samples. The heterostructures were formed with Bi2WO6 nanoflakes or nanoparticles attached on the surface of TiO2 nanotubes. The photocatalytic activity of Bi2WO6/TiO2-NTs heterostructures was evaluated sufficiently by photodegradation of rhodamine B (RhB) under multimode including UV, visible and microwave-assisted photocatalysis. Compared to TiO2 nanotubes and Bi2WO6, Bi2WO6/TiO2-NTs-35 shows the highest photocatalytic activity under multimode. In contrast with UV, visible mode, the Bi2WO6/TiO2-NTs-35 shows the highest activity toward RhB degradation under microwave-assisted photocatalytic mode. This enhanced photocatalytic activity is due to the more efficient separation of the e--h+ pairs, originating from the introduction of Bi2WO6 modified TiO2-NTs, the nanotubular geometries, and degradation mode. The main active species of the degradation process are proven to be h+, ·OH, and ·O2- radicals. Moreover, more ·OH and ·O2- radicals were generated under microwave-assisted photocatalytic mode. |
Keywords: TiO2 nanotubes Bi2WO6 multimode degradation photocatalysis |
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MA Feng-Yan,YANG Yang,LI Na,YANG Qi-Lin,LI Shang-Jin,SHEN Lu-Yan.Comparison of Photocatalytic Activity of Bi2WO6/TiO2 Nanotubes Heterostructures Composite under Multimode[J].Chinese Journal of Inorganic Chemistry,2017,33(9):1656-1666. |
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