| CeTiO4/g-C3N4复合材料的制备及其高效的光催化染料降解性能 |
| Preparation of CeTiO4/g-C3N4 Composite with Efficient Photocatalytic Activity for Dye-Degradation |
| 作者 | 单位 | E-mail | | 李中钦 | 盐城工学院机械工程学院, 盐城 224051 | | | 陈小卫 | 盐城工学院材料科学与工程学院, 盐城 224051 | chenxw@ycit.edu.cn | | 王艳 | 盐城工学院化学化工学院, 盐城 224051 | | | 程婷 | 盐城工学院材料科学与工程学院, 盐城 224051
江苏大学材料科学与工程学院, 镇江 212013 | | | 黄毅 | 盐城工学院机械工程学院, 盐城 224051 | | | 董鹏玉 | 盐城工学院, 江苏省新型环保重点实验室, 盐城 224051 | | | 王勿忧 | 盐城工学院化学化工学院, 盐城 224051 | | | 张蓓蓓 | 盐城工学院化学化工学院, 盐城 224051 | | | 奚新国 | 盐城工学院化学化工学院, 盐城 224051 | xxg@ycit.cn |
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| 摘要: 采用简单固相法成功制备了CeTiO4/g-C3N4-x（CTO/CN-x，x g为g-C3N4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）、N2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：CeTiO4与g-C3N4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0.020 2 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。 |
| 关键词: CeTiO4 g-C3N4 异质结 光催化性能 |
| 基金项目: 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）和江苏省研究生科研与实践创新计划项目（No.SJCX19_1037）资助。 |
| Abstract: The composite of CeTiO4/g-C3N4-x (CTO/CN-x, x g was the addition amount of g-C3N4) 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), N2 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 degradation 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 0.020 2 min-1 for CTO/CN-6 (The addition amount of g-C3N4 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. |
| Keywords: CeTiO4 g-C3N4 heterostructure photocatalytic activity |
| 投稿时间：2021-03-30 修订日期：2021-11-06 |
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| 李中钦,陈小卫,王艳,程婷,黄毅,董鹏玉,王勿忧,张蓓蓓,奚新国.CeTiO4/g-C3N4复合材料的制备及其高效的光催化染料降解性能[J].无机化学学报,2022,38(1):53-62. |
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