Photothermal Conversion of W18O49 with a Tunable Oxidation State

W18O49 with a tunable oxidation state was prepared by addition of NaNO3 or NaBH4 as a redox agent in the solvothermal system. The addition of redox agents has no influence on the crystallization of W18O49. The obtained W18O49 structures keep their morphology as a bundle of nanowires with a regular h...

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Bibliographic Details
Published in:ChemistryOpen (Weinheim) 2017-04, Vol.6 (2), p.261-265
Main Authors: Fang, Zhenxing, Jiao, Shihui, Kang, Yutang, Pang, Guangsheng, Feng, Shouhua
Format: Article
Language:English
Subjects:
Absorption cross sections
Crystallization
Nanowires
near-IR absorption
Oxidation
oxygen vacancy
Photothermal conversion
photothermal stability
Reagents
Surface plasmon resonance
tunable oxidation state
Valence
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Summary:W18O49 with a tunable oxidation state was prepared by addition of NaNO3 or NaBH4 as a redox agent in the solvothermal system. The addition of redox agents has no influence on the crystallization of W18O49. The obtained W18O49 structures keep their morphology as a bundle of nanowires with a regular hexagonal on the cross‐section. W18O49 exhibits strong valence‐dependent absorption features in the near‐IR region. Reduced W18O49 with more W5+ has a higher concentration of oxygen vacancies, which enhances the localized surface plasmon resonance effect. Reduced W18O49 exhibits a high photothermal conversion efficiency of 59.6 % and has good photothermal stability. Photo‐ready: W18O49 with a tunable oxidation state is prepared by addition of NaNO3 or NaBH4 as a redox agent in the solvothermal system. The reduced W18O49 with more W5+ has a higher concentration of oxygen vacancies and exhibits strong near‐IR absorption. Reduced W18O49 exhibits a high photothermal conversion efficiency of 59.6 % and has good photothermal stability.
ISSN:2191-1363
2191-1363
DOI:10.1002/open.201600149