摘要
通过水热和原位还原法制备了一种新型Z型异质结三元复合材料Au NPs/g-C3N4/BiOBr,并通过X射线衍射、X射线光电子能谱、透射电子显微镜、紫外-可见漫反射光谱和光致发光发射光谱等技术对材料的形貌、结构进行了表征。通过在可见光下降解苯酚来评价光催化剂的活性。研究发现,Au NPs/g-C3N4/BiOBr显示出增强的光催化活性,对苯酚的降解能力是g-C3N4的3倍,是BiOBr的2.5倍。这可归因于三元复合材料的窄带隙(2.10eV)、Z型机理对光生电子-空穴对的有效分离和Au纳米颗粒的表面等离子体共振效应(SPR)。
A novel ternary Au NPs/g-C3N4/BiOBr Z-scheme heterojunction composite was fabricated through hydrothermal and in-situ reduction method, and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, ultraviolet-visible diffuse reflection spectroscopy and photoluminescence emission spectroscopy. The photocatalytic activity was evaluated by the degradation of phenol under visible-light irradiation. It was found that Au NPs/g-C3N4/BiOBr showed enhanced photocatalytic activity, which is 3-fold higher than g-C3N4 and 2.5-fold higher than BiOBr. This could be attributed to the effective separation of photogenerated electron-hole pairs, narrowed band gap (2.10 eV) and surface plasmon resonance (SPR).
作者
王亮
张红光
郭春雨
冯丽娟
李春虎
王文泰
WANG Liang;ZHANG Hong-guang;GUO Chun-yu;FENG Li-juan;LI Chun-hu;WANG Wen-tai(College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China)
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2019年第7期834-842,I0004,共10页
Journal of Fuel Chemistry and Technology
基金
supported by the National Natural Science Foundation of China(51602297)
Fundamental Research Funds for the Central Universities(201612007)
Postdoctoral Innovation Program of Shandong Province(201603043)
the Major Research Project of Shandong Province(2016ZDJS11A04)
