BiOBr纳米片的制备与改性进展

Preparation and Modification of BiOBr Nanosheets

BiOBr半导体材料具有独特的层状结构,合适的带隙宽度,化学稳定性等优点,是当前人们的研究热点。本文研究了BiOBr半导体材料的光催化活性,并且对BiOBr光催化剂制备方法进行了简要综述。同时,发现由于BiOBr的能带位置不合适,对太阳能的利用率不高,且存在电子空穴对容易复合问题,本文着重阐述了国内外研究人员通过提高Bi元素的含量,复合半导体,掺杂,贵金属沉积等方法来调整光催化剂的能带结构和界面表面结构,进而改善光催化材料的活性。

Bi OBr semiconductor material has unique layered structure,suitable band gap width,chemical stability and other advantages,which is the hot spot of current research. The photocatalytic activity of Bi OBr semiconductor materials was studied and the preparation method of Bi OBr photocatalysts was briefly reviewed. At the same time,due to the unreasonable energy band position of Bi OBr,it was found that the utilization of solar energy was low,and electron-hole pairs were easy to recombine. It was emphasized that the domestic and foreign researchers adjusted the energy band structure and interface surface structure of the photocatalyst by improving the content of Bi element, composite semiconductors,doping and precious metal deposition,thereby improving the activity of the photocatalytic material.