NDLI: Oxygen vacancy-enhanced visible light-driven photocatalytic activity of TiO2 sphere

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Oxygen vacancy-enhanced visible light-driven photocatalytic activity of TiO2 sphere–W18O49 nanowire bundle heterojunction

Content Provider	Semantic Scholar
Author	Liu, Jincheng Yu, Shuyan Zhu, Wenyu Yan, Xiaoli
Copyright Year	2015
Abstract	Abstract In this study, the W 18 O 49 nanowire bundles were grown on the surface of nanoporous TiO 2 sphere by a two-step solvothermal method to fabricate a novel TiO 2 –W 18 O 49 nanowire bundle (TW) heterojunction structure. The TiO 2 core and ethylene glycol play important roles in the synthesis. The prepared TW photocatalysts possess larger specific surface area, higher porosity, and stronger visible light absorption than that of TiO 2 . All the TW composites exhibit higher photocatalytic activity in the degradation of rhodamine B (RhB) under visible light and UV light irradiation than that of pure TiO 2 sphere and neat W 18 O 49 urchin. The TW125 with the W/Ti ratio of 0.38 presents the highest photocatalytic activity under visible light irradiation, while TW100 with the W/Ti ratio of 0.20 shows the highest photocatalytic activity under UV light irradiation. The W 5+ defects and oxygen vacancies significantly affected the visible light-driven photocatalytic activity of TW composites. The significantly improved photocatalytic activity is attributed to the synergetic effect of larger surface area, extended visible light absorption and the promoted electron–hole separation. Our study will be helpful to design and optimize the heterojunction photocatalysts, and the novel TW heterojunctions will have great application potential in the field of environmental purification and clean energy.
Starting Page	30
Ending Page	39
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1016/j.apcata.2015.04.033
Volume Number	500
Alternate Webpage(s)	https://dr.ntu.edu.sg/bitstream/handle/10220/38333/manuscript-YXL.PDF?isAllowed=y&sequence=1
Alternate Webpage(s)	https://dr.ntu.edu.sg/bitstream/handle/10220/38333/manuscript-YXL.PDF;jsessionid=A4E51C76641EF901CFA9D3D78D3AD5F4?sequence=1
Alternate Webpage(s)	https://dr.ntu.edu.sg/bitstream/handle/10220/38333/manuscript-YXL.PDF;jsessionid=61A0A0D2F5FEC967F360230D326AB946?sequence=1
Alternate Webpage(s)	https://doi.org/10.1016/j.apcata.2015.04.033
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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