摘要
采用简单固相法成功制备了CeTiO_(4)/g⁃C_(3)N_(4)⁃x(CTO/CN⁃x,x g为g⁃C_(3)N_(4)的添加量)复合材料,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、N_(2)吸附-脱附测试、紫外可见吸收光谱(UV⁃Vis)及电化学测试对材料进行表征。研究发现:CeTiO_(4)与g⁃C_(3)N_(4)层状纳米片紧密复合,并成功构建了界面异质结结构;形成CTO/CN⁃x复合相的光催化材料具有良好的可见光光响应性能,且光生空穴-电子对的分离和迁移率明显提高;通过太阳光模拟不同样品光催化降解有机污染物罗丹明B,降解140 min后复合材料CTO/CN⁃6表现出最高的光催化活性,反应速率常数为0.0202 min^(-1)。其活性增强的主要原因是异质结结构的构筑降低了CTO光生载流子的复合几率,提高了光生载流子的迁移速率。
The composite of CeTiO_(4)/g⁃C_(3)N_(4)⁃x(CTO/CN⁃x,x g was the addition amount of g⁃C_(3)N_(4))was successfully prepared via a simple solid method synthesis.The as⁃synthesized catalysts were characterized by X⁃ray diffraction(XRD),scanning electron microscope(SEM),transmission electron microscope(TEM),N_(2) adsorption⁃desorption test,X⁃ray photoelectron spectroscopy(XPS),UV⁃Vis diffuse reflectance spectra(UV⁃Vis DRS),and electrochemical test.It was found that CTO and CN layered nanoplates were closely combined to form heterostructure.CTO/CN⁃x composite photocatalyst exhibited outstanding visible light response,and it could improve the separation and mobility of photogenerated hole⁃electron pair.The photocatalytic activity of composite material was assessed by degrada⁃tion of rhodamine B under simulated sunlight for 140 min.Compared to pure CTO and CN,CTO/CN⁃x composite showed the enhancement of photocatalytic activity,and the optimum reaction rate constant was 0.0202 min^(-1) for CTO/CN⁃6(The addition amount of g⁃C_(3)N_(4) was 6 g).The enhanced photocatalytic performance was mainly ascribed to the structure of heterostructure,which could reduce the recombination of CTO photocarriers and improve the transfer of photocarriers.
作者
李中钦
陈小卫
王艳
程婷
黄毅
董鹏玉
王勿忧
张蓓蓓
奚新国
LI Zhong-Qin;CHEN Xiao-Wei;WANG Yan;CHENG Ting;HUANG Yi;DONG Peng-Yu;WANG Wu-You;ZHANG Bei-Bei;XI Xin-Guo(School of Mechanical Engineering,Yancheng Institute of Technology,Yancheng,Jiangsu 224051,China;School of Materials Science and Engineering,Yancheng Institute of Technology,Yancheng,Jiangsu 224051,China;School of Chemistry and Chemical Engineering,Yancheng Institute of Technology,Yancheng,Jiangsu 224051,China;School of Materials Science and Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province,Yancheng Institute of Technology,Yancheng,Jiangsu 224051,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2022年第1期53-62,共10页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.51772258)
住房和城乡建设部科学技术项目(No.2018⁃K1⁃004)
江苏省研究生科研与实践创新计划项目(No.SJCX19_1037)资助。
作者简介
通信联系人:陈小卫E⁃mail:chenxw@ycit.edu.cn;通信联系人:奚新国⁃mail:xxg@ycit.cn。
