1. Photothermal Conversion of W18O49 with a Tunable Oxidation State.
- Author
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Fang, ZhENxing, Jiao, Shihui, Kang, Yutang, Pang, GuangshENg, and FENg, Shouhua
- Subjects
PHOTOTHERMAL conversion ,TUNGSTEN compounds ,OXIDATION states ,SODIUM compounds ,OXIDATION-reduction reaction ,NANOWIRES - Abstract
W
18 O49 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 W18 O49 . The obtained W18 O49 structures keep their morphology as a bundle of nanowires with a regular hexagonal on the cross-section. W18 O49 exhibits strong valence-dependent absorption features in the near-IR region. Reduced W18 O49 with more W5+ has a higher concentration of oxygen vacancies, which enhances the localized surface plasmon resonance effect. Reduced W18 O49 exhibits a high photothermal conversion efficiency of 59.6 % and has good photothermal stability. [ABSTRACT FROM AUTHOR]- Published
- 2017
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