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The enhanced photocatalytic activity of Yb3+-Ho3+/Er3+ co-doped 3D BiOCl flower
Dyes and Pigments ( IF 4.1 ) Pub Date : 2017-10-25 , DOI: 10.1016/j.dyepig.2017.10.026
Siying Niu , Ruoyu Zhang , Xianju Zhou , Xiaoqi Zhao , Hao Suo , Yang Jiao , Hebao Yao , Chongfeng Guo

A series of characteristic 3D flower-like BiOCl photocatalysts constructed by the self-assembling of BiOCl nanosheets substructures were synthesized through hydrothermal method, in which Ho3+/Yb3+ and Er3+/Yb3+ ion pairs were introduced to co-dope BiOCl to enhance photo-catalytic activity. Their structure, shape and morphology were not only characterized by power X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) and transmission electron microscopy (TEM), but also calculated the host electronic structure. The photocatalytic performances of Ho3+/Yb3+ and Er3+/Yb3+ co-doped BiOCl samples were enhanced greatly and evaluated by the degradation of rhodamine B (RhB) in aqueous solutions under the irradiation of stimulated sunlight and 450 nm blue light. To understand the potential reason, optical properties of the as-synthesized BiOCl samples were characterized by UV-vis diffuse reflectance spectra, up-conversion (UC) and down-conversion (DC) luminescence spectra were also investigated. The possible photo-catalytic mechanism was also raised, which develops a feasible method to improve the photocatalytic activity by combining with luminescence.



中文翻译:

Yb 3+ -Ho 3+ / Er 3+共掺杂3D BiOCl花的增强的光催化活性

通过水热法合成了由BiOCl纳米片子结构的自组装构建的一系列特征性的3D花状BiOCl光催化剂,其中将Ho 3+ / Yb 3+和Er 3+ / Yb 3+离子对引入共-掺杂BiOCl以增强光催化活性。它们的结构,形状和形态不仅通过功率X射线衍射(XRD),场发射扫描电子显微镜(FE-SEM)和透射电子显微镜(TEM)进行了表征,还计算了主体电子结构。Ho 3+ / Yb 3+和Er 3+ / Yb 3+的光催化性能在受激阳光和450 nm蓝光照射下,水溶液中若丹明B(RhB)的降解大大增强了共掺杂BiOCl样品的性能,并对其进行了评估。为了理解潜在的原因,通过紫外可见漫反射光谱表征了合成后的BiOCl样品的光学性能,还研究了上转换(UC)和下转换(DC)发光光谱。还提出了可能的光催化机理,为结合光致发光提高光催化活性提供了一种可行的方法。

更新日期:2017-10-25
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