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Comparison of Photocatalytic Activity of Bi2WO6/TiO2 Nanotubes Heterostructures Composite under Multimode
Author NameAffiliationE-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  
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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Chinese Journal of Inorganic Chemistry