纳米铁酸铋的制备、改性及光催化应用

FABRICATION,MODIFICATION AND PHOTOCATALYTIC APPLICATIONS OF BISMUTH FERRITE NANOMATERIALS

铁酸铋具有较窄的禁带宽度、较高的化学稳定性、较好的可见光响应能力等优势,被认为是半导体光催化剂的理想材料之一。然而,铁酸铋作为光催化剂常存在载流子效率低、光生电子-空穴对复合率高等缺陷,实际应用受限。在概述铁酸铋基本性质和光催化机理的基础上,首先详细介绍了铁酸铋的常用制备方法;随后重点阐述了元素掺杂、异质结构建和形貌控制等3种铁酸铋改性策略;最后着重综述了铁酸铋在光催化领域中的应用研究进展,并对今后铁酸铋光催化剂的研究重点和方向做出了展望。

Bismuth ferrite has been considered to be one of the ideal materials for semiconductor photocatalysts due to its narrow band gap,high chemical stability,and excellent visible-light response.However,as a photocatalyst,bismuth ferrite always has some disadvantages,such as the low carrier efficiency and high photo-generated electron-hole pair recombination rate,which limits its practical application.Based on the basic properties of bismuth ferrite and photocatalytic mechanism,this review firstly introduced the common fabrication methods of bismuth ferrite.Subsequently,three modification strategies,including element doping,heterojunction construction and morphology control were elaborated.Finally,the photocatalytic applications of bismuth ferrite were summarized.Meanwhile,the future research focus and direction of bismuth ferrite-based photocatalysts were prospected.