Controllable Synthesis and Enhanced Photoactivity of Two-Dimensional Bi2WO6 Ultra-Thin Nanosheets,ChemistrySelect

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Controllable Synthesis and Enhanced Photoactivity of Two-Dimensional Bi2WO6 Ultra-Thin Nanosheets
ChemistrySelect ( IF 1.9 ) Pub Date : 2021-06-10 , DOI: 10.1002/slct.202101280
Ben Pang ₁ , Sicong Liu ₁ , Yan Tu ₁ , Xiong Wang ₁

Affiliation

Two-dimensional Bi₂WO₆ ultra-thin nanosheets were controllably synthesized by a cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method. The structure, morphology, energy gap, and thickness of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), (diffuse reflection spectroscopy) DRS, and so on. The photocatalytic activity of the samples was analyzed by the degradation of rhodamine B. The photocatalytic performance of the ultrathin nanosheets was much enhanced nearly 3.5 folds higher than that of Bi₂WO₆ nanoparticles, which was attributed to the narrow band gap and the open sandwich structure, resulting in the improved light harvesting and the rapid separation and transfer of the photoinduced charge carriers. According to the radical trapping results, the dominant active species involving in the photocatalytic process were determined.

中文翻译：

二维 Bi2WO6 超薄纳米片的可控合成和增强的光活性

采用十六烷基三甲基溴化铵（CTAB）辅助水热法可控合成二维Bi ₂ WO ₆超薄纳米片。通过X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、原子力显微镜（AFM）、（漫反射光谱）对样品的结构、形貌、能隙和厚度进行表征DRS 等等。通过降解罗丹明B来分析样品的光催化活性。超薄纳米片的光催化性能比Bi ₂ WO ₆提高近3.5倍纳米粒子，这归因于窄带隙和开放的夹心结构，从而改善了光收集以及光致电荷载流子的快速分离和转移。根据自由基捕获结果，确定了参与光催化过程的主要活性物种。

更新日期：2021-06-10

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