Nanospherical composite of WO3 wrapped NaTaO3: Improved photodegradation of tetracycline under visible light irradiation
作者： Lingnan Qu , Junyu Lang , Shuwei Wang , Zhanli Chai , Yiguo Su
DOI: 10.1016/J.APSUSC.2015.12.095
关键词:
摘要: Abstract In this paper, WO 3 -wrapped NaTaO nanospheres photocatalysts with different W/Ta molar ratios were successfully prepared via a facile hydrothermal method. The samples characterized by X-ray diffraction, transmission and scan electron microscopy, photoelectron spectroscopy, FT-IR spectrum, UV−vis diffuse reflectance Barrett−Emmett−Teller technique. photocatalytic activities for degrading tetracycline hydrochloride under visible light irradiation examined. results indicated that the as-prepared @WO showed obvious enhancement in degradation ratio, compared pure irradiation. optimum percentage of composites 60.88% rate was W:Ta = 0.3:1 mole, which mainly attributed to effective separation photo-generated hole as well expanding absorption edge region due spherical heterojunction wrapping on surface . radicals trapping experiments demonstrated there multiple active species during process TC. possible mechanism composite also proposed.
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