Synthesis and photocatalytic property of N-doped TiO2 nanorods and nanotubes with high nitrogen content
Synthesis and photocatalytic property of N-doped TiO2 nanorods and nanotubes with high nitrogen content
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DOI：
10.1016/j.apsusc.2011.09.051
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发表时间：
2011-11
影响因子：
6.7
通讯作者：
Zuoli He;Haiyan He
中科院分区：
文献类型：
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作者：
Zuoli He;Haiyan He
将N掺杂TiO2纳米棒在8M NaOH溶液中于110°C水热处理20h，制备了N掺杂TiO2纳米管。以硫酸钛、尿素和二氯乙烷为前驱体，采用溶剂热法合成了N掺杂的TiO2纳米棒。采用X射线衍射、透射电子显微镜和紫外可见分光光度计对N掺杂的TiO2纳米棒和纳米管进行了表征。氮掺杂的TiO2纳米棒和纳米管的氮含量达到36.9at.%和25.7at.%，分别氮掺杂使纳米棒和纳米管的带隙变窄，并在粉体中引入间接带隙，使其吸收边分别扩展到可见光区和红外区。与纳米棒相比，纳米管具有更大的比表面积和更高的对甲基橙子的降解效率。
Nano N-doped TiO2nanotubes were fabricated by hydrothermally treating N-doped TiO2nanorods in a 8M NaOH solution at 110°C for 20h. The N-doped TiO2nanorods were synthesized by a solvothermal process with precursor solution containing titanium sulfate, urea, and dichloroethane. The N-doped TiO2nanorods and nanotubes were characterized with X-ray diffraction, transmission electron microscopy, and UV–vis spectrophotometry. The nitrogen contents of the N-doped TiO2nanorods and nanotubes were reached to high values of 36.9at.% and 25.7at.%, respectively. The nitrogen doping narrowed the band gap of the N-doped TiO2nanorods and nanotubes and introduced indirect band gap to the powders, which respectively extended the absorption edge to visible light and infrared region. The nanotubes showed larger specific surface area and greater degradation efficiency to methyl orange than the nanorods.