欧小雨,沈群,黎小芳,陆亚超,吕康乐.N掺杂TiO2纳米纤维光催化氧化NO[J].中南民族大学学报自然科学版,2021,40(2):117-123
N掺杂TiO2纳米纤维光催化氧化NO
N-doped TiO2 nanofibers for photocatalytic oxidation of NO
  
DOI:10.12130/znmdzk.20210202
中文关键词: 静电纺丝  纳米纤维  光催化  二氧化钛  掺杂
英文关键词: electrospinning  nanofiber  photocatalysis  titanium dioxide  doping
基金项目:国家自然科学基金资助项目(51672312)
作者单位
欧小雨 中南民族大学 资源与环境科学学院 & 教育部催化与能源材料化学重点实验室武汉430074 
沈群 杭州市质量技术监督检测院杭州 310019 
黎小芳 武汉科技大学 化学与化工学院武汉430081 
陆亚超 中南民族大学 资源与环境科学学院 & 教育部催化与能源材料化学重点实验室武汉430074 
吕康乐 中南民族大学 资源与环境科学学院 & 教育部催化与能源材料化学重点实验室武汉430074 
摘要点击次数: 109
全文下载次数: 69
中文摘要:
      为提升TiO2纳米纤维的光吸收性能,将纳米片组装的TiO2纳米纤维与含氮的有机物(尿素、三聚氰胺和二氰二胺)一起混合煅烧,成功制备了氮掺杂TiO2纳米纤维,探讨了N掺杂对TiO2光催化性能的影响.采用扫描电镜(SEM)、傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)、X射线光电子能谱(XPS)、可见紫外漫反射光谱(UV-vis DRS)和粉末荧光光谱(PL)等手段,对光催化剂进行了表征,通过可见光下氧化NO来评价催化剂的活性.结果表明:N掺杂有效提高TiO2纳米纤维的光催化活性,其中,以尿素为N源所制备的N掺杂TiO2纳米纤维[N-TiO2(U)],表现出最强的光催化氧化NO活性,其NO去除率高达50.8%,显著高于本征TiO2纳米纤维39.4%的NO去除率.这归因于N掺杂增强了光吸收性,并提升了TiO2纳米纤维载流子分离效率.
英文摘要:
      To improve the light absorption property of TiO2 nanofibers, N-doped TiO2 nanofibers were successfully synthesized by calcination of the mixture of TiO2 nanofibers and N-containing organic substances such as urea, dicyandiamide and melamine, and the effect of N-doping on the photocatalytic performance of TiO2 nanofibers was also investigated. The photocatalysts were characterized by SEM, FTIR, XRD, XPS, UV-vis DRS and PL, etc., and the activity was visually evaluated by photocatalytic oxidation of NO. It was found that N-doping could effectively improve the photocatalytic activity of TiO2 nanofibers. The sample N-TiO2(U) which was prepared using urea as the nitrogen source showed the highest photocatalytic activity towards NO oxidation, with a NO removal rate of 50.8%, much higher than that of pristine TiO2 nanofibers (39.4%). The enhanced photoreactivity of TiO2-NFs was ascribed to the doping of N, which improved the light-harvesting ability and stimulated the separation of photo-generated charge carriers.
查看全文   查看/发表评论  下载PDF阅读器
关闭