Phase‐Transition Induced Conversion into a Photothermal Material: Quasi‐Metallic WO2.9 Nanorods for Solar Water Evaporation and Anticancer Photothermal Therapy |
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| Authors: | Lei Sun Zhuo Li Rui Su Yuanlin Wang Zhenglin Li Baosheng Du Prof Ye Sun Prof Pengfei Guan Prof Flemming Besenbacher Prof Miao Yu |
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| Affiliation: | 1. State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China;2. Interdisciplinary Nanoscience Center (iNANO) and Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark;3. Beijing Computational Science Research Center, Beijing, China;4. Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin, China |
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| Abstract: | Phase transition from WO3 to sub‐stoichiometric WO2.9 by a facile method has varied the typical semiconductor to be quasi‐metallic with a narrowed band gap and a shifted Femi energy to the conduction band, while maintaining a high crystallinity. The resultant WO2.9 nanorods possess a high total absorption capacity (ca. 90.6 %) over the whole solar spectrum as well as significant photothermal conversion capability, affording a conversion efficiency as high as around 86.9 % and a water evaporation efficiency of about 81 % upon solar light irradiation. Meanwhile, the promising potential of the nanorods for anticancer photothermal therapy have been also demonstrated, with a high photothermal conversion efficiency (ca. 44.9 %) upon single wavelength near‐infrared irradiation and a high tumor inhibition rate (ca. 98.5 %). This study may have opened up a feasible route to produce high‐performance photothermal materials from well‐developed oxides. |
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| Keywords: | hydrogenation nanorod photothermal therapy solar water evaporation WO2 9 |
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