Jiangsu Engineering and Technology Research Center of Environmental Cleaning Materials (ECM), Nanjing University of Information Science &Technology, 219 Ningliu Road, Nanjing 210044, China.
Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science &Technology, 219 Ningliu Road, Nanjing 210044, China.
Sci Rep. 2016 Sep 2;6:32457. doi: 10.1038/srep32457.
Both energy band and charge separation and transfer are the crucial affecting factor for a photochemical reaction. Herein, the BiOCl nanosheets without and with surface bismuth vacancy (BOC, V-BOC) are prepared by a simple hydrothermal method. It is found that the new surface defect states caused by bismuth vacancy have greatly up-shifted the valence band and efficiently enhanced the separation and transfer rates of photogenerated electron and hole. It is amazing that the photocatalytic activity of V-BOC is 13.6 times higher than that of BOC for the degradation methyl orange (MO). We can develop an efficient photocatalyst by the introduction of defects.
能带和电荷分离转移都是光化学反应的关键影响因素。在此，通过简单的水热法制备了无表面铋空位（BOC，V-BOC）和具有表面铋空位的 BiOCl 纳米片。研究发现，铋空位引起的新的表面缺陷态大大提高了价带，有效地提高了光生电子和空穴的分离和转移速率。令人惊讶的是，V-BOC 对甲基橙（MO）的光降解活性比 BOC 高 13.6 倍。通过引入缺陷可以开发出高效的光催化剂。
