Open AccessPhotothermal Conversion of W 18 O 49 with a Tunable Oxidation State
Author(s) -
Fang Zhenxing,
Jiao Shihui,
Kang Yutang,
Pang Guangsheng,
Feng Shouhua
Publication year - 2017
Publication title -
chemistryopen
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 29
ISSN - 2191-1363
DOI - 10.1002/open.201600149
Subject(s) - photothermal therapy , surface plasmon resonance , crystallization , redox , valence (chemistry) , materials science , nanoparticle , oxidation state , nanotechnology , chemistry , photochemistry , chemical engineering , crystallography , inorganic chemistry , metal , organic chemistry , engineering , metallurgy
W 18 O 49 with a tunable oxidation state was prepared by addition of NaNO 3 or NaBH 4 as a redox agent in the solvothermal system. The addition of redox agents has no influence on the crystallization of W 18 O 49 . The obtained W 18 O 49 structures keep their morphology as a bundle of nanowires with a regular hexagonal on the cross‐section. W 18 O 49 exhibits strong valence‐dependent absorption features in the near‐IR region. Reduced W 18 O 49 with more W 5+ has a higher concentration of oxygen vacancies, which enhances the localized surface plasmon resonance effect. Reduced W 18 O 49 exhibits a high photothermal conversion efficiency of 59.6 % and has good photothermal stability.