摘要
采用水解法,以氯化钠、五水合硝酸铋为原料,成功制备了不同水解温度下的BiOCl.采用X射线衍射(XRD)、荧光光谱(PL)、固体漫反射光谱(DRS)等测试方法表征了材料的物相结构和光学性能.系统研究了水解温度对样品相组成、光学性能和光催化性能的影响.以罗丹明B(RhB)为目标降解物,进一步研究了样品的光催化性能.实验结果表明溶液温度为50℃时,得到的BiOCl样品,其发光强度最低、吸附和降解能力最好,这是因为该温度下合成的BiOCl禁带宽度最小,载流子分离效率最高,有效降低了电子和空穴的复合,从而显著提高材料的光催化性能.
BiOCl photocatalysts were prepared successfully under different temperatures by the hydrolysis method using NaCl and bismuth nitrate as raw materials.The phase compositions and optical properties were characterized by XRD,PL and DRS.The influences of hydrolysis temperatures on the phase composition,optical and photocatalytic properties of BiOCl were systematically investigated.The photocatalytic activities of BiOCl synthesized under different temperatures were further studied using Rhodamine B(RhB)as a model pollutant.The experimental results show that BiOCl synthesized under 50℃ exhibits the lowest PL emission,the best adsorption ability and visible light photocatalytic activities,which can be attributed to the minimum bandgap energy and the highest separation efficiency of the carrier,resulting in improved photocatalytic performance.
出处
《聊城大学学报（自然科学版）》
2017年第3期47-50,共4页
Journal of Liaocheng University:Natural Science Edition
基金
国家自然科学基金项目(51303076)资助
