Preparation of BiF3/BiOBr heterojunctions from microwave-assisted method and photocatalytic performances.
Preparation of BiF3/BiOBr heterojunctions from microwave-assisted method and photocatalytic performances.
复制标题
DOI：
10.1016/j.jhazmat.2018.12.060
复制
发表时间：
2019-04
影响因子：
13.6
通讯作者：
Shujuan Zhang;Xiaoxiao Chen;Limin Song
中科院分区：
文献类型：
--
作者：
Shujuan Zhang;Xiaoxiao Chen;Limin Song
采用快速稳定的微波辅助法制备了新型BiF3/BiOBr异质结光催化剂，并用x射线衍射、x射线光电子能谱、扫描电镜、紫外可见光谱和荧光光谱对其进行了表征。光照条件下，bi3 /BiOBr异质结的光催化活性明显高于纯BiOBr或BiOBr，且在Br:F摩尔比为1:1时达到最大，20 mg/L罗丹明B （Rhodamine B, RhB）靶溶液在40 min内完全降解。这主要是因为在光催化降解过程中形成的独特的BiF3/BiOBr异质结加速了光电子和空穴的分离，有效地提高了量子效率，从而增强了光催化活性。
Novel BiF3/BiOBr heterojunction photocatalysts were prepared from a fast and stable microwave-assisted method, and characterized by X-ray diffractometry, X-ray photoelectron spectroscopy, scanning electron microscopy, ultraviolet-visible spectroscopy and fluorescence spectroscopy. The photocatalytic activity of BiF3/BiOBr heterojunctions under light irradiation was significantly higher than pure BiOBr or BiF3, and was maximized at the Br:F molar ratio of 1:1, as the targeted 20 mg/L Rhodamine B (RhB) solution was completely degraded within 40 min. This was mainly because the unique BiF3/BiOBr heterojunction formed during photocatalytic degradation accelerated the photoelectron and hole separation, effectively enhanced the quantum efficiency, and thereby strengthened the photocatalytic activity.