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材料工程  2020, Vol. 48 Issue (9): 69-76    DOI: 10.11868/j.issn.1001-4381.2019.000935
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
CeO2-Ag/AgBr复合微球的合成及光催化性能
李鹏鹏, 苏复, 顾正桂
南京师范大学 化学与材料科学学院, 南京 210046
Synthesis and visible light photocatalytic performance of CeO2-Ag/AgBr composite microspheres
LI Peng-peng, SU Fu, GU Zheng-gui
School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
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摘要 通过水热法合成CeO2介孔微球,并在其表面负载AgBr纳米粒子(NPs)。利用光沉积法原位还原得到少量Ag纳米粒子,制备出CeO2-Ag/AgBr异质结结构催化剂。采用扫描电子显微镜(SEM)、紫外-可见光漫反射(DRS)、透射电子显微镜(TEM)、荧光光谱(PL)及X射线光电子能谱(XPS)等方法对CeO2-Ag/AgBr样品进行表征。以罗丹明B (RhB)为目标降解物,采用氙灯(500 W)光源,考察CeO2-Ag/AgBr (CAAB)的光催化性能。结果表明:CAAB-3(AgBr质量分数为36.03%)的光催化活性最高。CAAB-3浓度为5 mg/L时,RhB溶液在80 min内的降解率为94.84%,是单一CeO2降解能力的22.3倍,经过多次循环实验CAAB-3仍能保持88.55%的降解率。Ag NPs的等离子共振效应降低了电子-空穴与光生载流子的复合,增强了光催化性能。
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李鹏鹏
苏复
顾正桂
关键词 CeO2AgBrZ型异质结光催化活性    
Abstract:CeO2 mesoporous microspheres were synthesized by hydrothermal method and loaded with AgBr nanoparticles(NPs)on their surface. A small amount of Ag nanoparticles were obtained by in-situ reduction by photo deposition method to prepare CeO2-Ag/AgBr heterostructure catalyst. CeO2-Ag/AgBr samples were characterized by scanning electron microscopy (SEM), ultraviolet diffuse reflection (DRS), transmission electron microscopy (TEM), fluorescence spectroscopy (PL) and X-ray photoelectron spectroscopy(XPS).The photocatalytic performance of CeO2-Ag/AgBr(CAAB) was investigated with Rhodamine B(RhB) as the target degradation material and xenon lamp (500 W). The results show that the photocatalytic activity of CAAB-3 (36.03%AgBr) is the highest. When the concentration of CAAB-3 is 5 mg/L, the degradation rate of RhB reaches 94.84% within 80 min, which is 22.3 times of the degradation capacity of CeO2. After multiple cycles of experiments, the degradation rate of CAAB-3 remains stable at 88.55%. The plasma on resonance effect of Ag NPs reduces the recombination of electron holes and photogenic carriers and enhances the photocatalytic performance.
Key wordsCeO2    AgBr    Z-scheme heterojunction    photocatalytic activity
收稿日期: 2019-10-12      出版日期: 2020-09-17
中图分类号:  O643.3  
通讯作者: 苏复(1977-),男,实验师,硕士,研究方向:催化材料、光催化降解,联系地址:江苏省南京市栖霞区文苑路一号南京师范大学化学与材料科学学院(210046),E-mail:07192@njnu.edu.cn     E-mail: 07192@njnu.edu.cn
引用本文:   
李鹏鹏, 苏复, 顾正桂. CeO2-Ag/AgBr复合微球的合成及光催化性能[J]. 材料工程, 2020, 48(9): 69-76.
LI Peng-peng, SU Fu, GU Zheng-gui. Synthesis and visible light photocatalytic performance of CeO2-Ag/AgBr composite microspheres. Journal of Materials Engineering, 2020, 48(9): 69-76.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000935      或      http://jme.biam.ac.cn/CN/Y2020/V48/I9/69
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