Abstract
Dual-purpose method for efficient removal of harmful organic dyes has been successfully realized by W18O49 nanostructure via fast absorption and advanced full-spectrum-responsive photocatalytic degradation from UV to near infrared (NIR). The removal more than 99% of MB could be finished as short as 1–2 min. The strong electrostatic interaction between the negative charged W18O49 surface and the cationic MB species is major reason for such a fast adsorption response. In addition, W18O49 nanostructure also could behave as photocatalyst for further degradation of MB. Advantages of W18O49 nanostructure used in this purpose benefit from its high optical absorption covering ultraviolet, visible light and NIR, which has good mineralizing ability under each spectrum, thus taking full use of solar energy. What is noteworthy, the regeneration of W18O49 after the absorption of MB could be simply realized by photo-irradiation process. As a result, it will be promising to use this dual-function material for deeply removal of organic dyes in wastewater.
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The financial supports from the National Natural Science Foundation of China (Grant Nos. 51572059, 51602083 and 21676066) and the National Natural Science Foundation of Heilongjiang Province (Grant No. E2016042) are gratefully acknowledged.
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Liu, D., Li, G., Zhao, C. et al. WO3−x for rapid adsorption and full-spectrum-responsive photocatalytic activities. J Mater Sci: Mater Electron 29, 15029–15033 (2018). https://doi.org/10.1007/s10854-018-9641-8
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DOI: https://doi.org/10.1007/s10854-018-9641-8