Na-doped α-Bi₂O₃ with a hierarchical flower-like shape was successfully prepared via a facile hydrothermal reaction. The samples consisted of well-crystalized nanoplates with smooth surfaces and a thickness of tens of nanometers. The phase formation was investigated via X-ray powder diffraction (XRD) patterns and structural refinements. The formations of oxygen vacancies were verified and its effects on the optical and photocatalysis were discussed. The band gap of α-Bi₂O₃ was narrowed via forming the local energy levels by oxygen vacancy defect complexes in the lattices. The photocatalytic activities on photo-degradation of Rhodamine B (RhB) were significantly improved. The effective photocatalysis was discussed on the improved visible-light response, band structure, and dynamic luminescence decay. The photocatalysis of Na-doped α-Bi₂O₃ was improved via the induced oxygen vacancies. The reported hydrothermal synthesis was advantageous approach to prepare α-Bi₂O₃ by considering the simplicity, low reaction temperature, no post-sintering, without using any template or surfactant, large-scale production, low cost, etc.

的Na掺杂的α-Bi系₂ ö ₃具有分级花状经由一个浅显的水热反应成功地制备。样品由表面光滑且厚度为数十纳米的良好结晶的纳米板组成。通过X射线粉末衍射（XRD）图案和结构改进研究了相形成。验证了氧空位的形成，并讨论了其对光学和光催化的影响。的带隙α-Bi系₂ ö ₃通过晶格中的氧空位缺陷配合物形成局部能级来缩小原子能级。罗丹明B（RhB）的光催化活性得到了显着提高。讨论了有效的光催化作用，以改善可见光响应，能带结构和动态发光衰减。的钠掺杂的α-Bi系的光催化₂ ö ₃经由感应氧空位提高。所报告的水热合成是制备α-Bi系有利的方法₂ ö ₃通过考虑简单起见，反应温度低，无烧结后，在不使用任何模板或表面活性剂，大规模生产，成本低，等等。