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氮掺杂SrTiO3/TiO2纳米棒异质结的制备及光催化活性 被引量:6

Preparation of N doped SrTiO3/TiO2 nanorods heterojunction and their photocatalystic activity
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摘要 通过水热反应和直接浸渍法在FTO导电玻璃上制备得到了高度有序的氮掺杂SrTiO3/TiO2纳米棒异质结阵列(N-STO/TNR),利用扫描电子显微镜(SEM),X射线衍射(XRD)和X射线光电子能谱(XPS)对其表面形貌,晶体结构和元素价态进行了分析。同时,采用荧光光谱(FL)、紫外可见漫反射光谱(UV-DRS),电化学阻抗谱(EIS)和莫特肖特基(MS)对异质结的光电性能进行了测试。最后以甲基橙为模拟污染物,考察了异质结材料在可见光下的光催化活性。结果表明,SrTiO3/TiO2异质结构能有效的分离光生载流子,同时N元素的掺杂将异质结的光谱响应范围扩展到可见光区,得益于半导体复合和能级修饰策略的协同增强效应,N-STO/TNR展现出优异的光电性能,N-STO/TNR的光催化效率是未改性的TNR样品的5.7倍。 Highly ordered N doping SrTiO3/TiO2 nanorods heterojunction arrays(N-STO/TNR)were prepared on FTO conduction glass by hydrothermal reaction and impregnation method.The surface morphology,crystal structure and valence states of elements were analyzed by SEM,XRD and XPS.The photoelectric properties of heterojunction were tested by FL,UV-DRS,EIS and MS.Finally,the photocatalystic activity of heterojunctions was researched under visible light with methyl orange as the simulating pollutant.The results indicated that the photogenerated carriers were separated due to heterostructure of SrTiO3/TiO2,meanwhile,N doping extended the spectral response to visible light region.N-STO/TNR showed excellent photoelectric performances due to the synergetic enhancing effect of coupled semiconductor and modified energy level.The photocatalystic efficiency of N-STO/TNR was 5.7 times that of original TNR.
作者 李雨遥 李治 王云芸 张翼飞 曹晓雨 桂嘉悦 冯波 段可 周杰 LI Yuyao;LI Zhi;WANG Yunyun;ZHANG Yifei;CAO Xiaoyu;GUI Jiayue;FENG Bo;DUAN Ke;ZHOU Jie(Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of MaterialsScience and Engineering, Southwest Jiaotong University, Chengdu 610031, China)
出处 《功能材料》 EI CAS CSCD 北大核心 2020年第1期1189-1195,共7页 Journal of Functional Materials
基金 国家重点研发计划资助项目(2017YFB0702602) 国家自然科学基金资助项目(31570955) 中央高校基本科研业务经费资助项目(2682017CX075)
关键词 SrTiO3/TiO2 异质结 TiO2纳米棒 氮掺杂 光催化 SrTiO3/TiO2 heterojunction TiO2 nanorods N doping photocatalystic
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