Synthesis of Bi2WO6 photocatalyst modified by SDBS and photocatalytic performance under visible light
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Bismuth tungstate (Bi2WO6) photocatalysts, which modified with different ratios of sodium dodecyl benzene sulfonate (SDBS) and with enhanced visible light-driven activity, were synthesized by a facile solvothermal process. The photocatalysts were characterized by X-ray diffraction, scanning electron and transmission electron microscopies, and X-ray photoelectron and ultraviolet–visible diffuse reflectance spectroscopies. SDBS addition was found to control particle morphology and improve photocatalytic activity of Bi2WO6 catalysts. The solvent-thermal reaction time was critical in determining the catalysts’ structures and shapes and optimal at 16 h. Photocatalytic activities of SDBS–Bi2WO6 were determined by photocatalytic degradation of tetracycline (TC) in aqueous solution under visible light irradiation. Optical properties and TC degradation tests showed these SDBS–Bi2WO6 catalysts to exhibit enhanced visible light-driven photodegradation for TC. The photocatalytic activity for TC degradation was maximized at 90.39% after 90 min at 1.0 wt% SDBS dosage. In addition, the possible mechanisms for catalyst formation and photocatalytic degradation were discussed.
This work was supported by the China Postdoctoral Science Foundation [Grant No. 2017M621214], also supported by the National Natural Science Foundation of China [Grant No. 21607050], the Science and Technology Projects of the Ministry of Housing and Urban–rural development (Grant No. 2017-K7-003), the Open Funds of the State Key Laboratory of Rare Earth Resource Utilization [Grant No. RERU2017023], the Natural Science Outstanding Young Talents Foundation of Jilin Province [Grant No. 20190103144JH], and the China Scholarship Council.
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Conflict of interest
The authors declare that they have no conflict of interests.
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