College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
Nanoscale Res Lett. 2014 Jan 16;9(1):34. doi: 10.1186/1556-276X-9-34.
N-doped mesoporous TiO2 nanorods were fabricated by a modified and facile sol-gel approach without any templates. Ammonium nitrate was used as a raw source of N dopants, which could produce a lot of gasses such as N2, NO2, and H2O in the process of heating samples. These gasses were proved to be vitally important to form the special mesoporous structure. The samples were characterized by the powder X-ray diffraction, X-ray photoelectron spectrometer, nitrogen adsorption isotherms, scanning electron microscopy, transmission electron microscopy, and UV-visible absorption spectra. The average length and the cross section diameter of the as-prepared samples were ca. 1.5 μm and ca. 80 nm, respectively. The photocatalytic activity was evaluated by photodegradation of methylene blue (MB) in aqueous solution. The N-doped mesoporous TiO2 nanorods showed an excellent photocatalytic activity, which may be attributed to the enlarged surface area (106.4 m2 g-1) and the narrowed band gap (2.05 eV). Besides, the rod-like photocatalyst was found to be easy to recycle.
N 掺杂介孔 TiO2 纳米棒是通过一种改进的、简单的溶胶-凝胶法制备的，没有使用任何模板。硝酸铵被用作 N 掺杂剂的原料，它在加热样品的过程中会产生大量的气体，如 N2、NO2 和 H2O。这些气体被证明对形成特殊的介孔结构非常重要。通过粉末 X 射线衍射、X 射线光电子能谱、氮气吸附等温线、扫描电子显微镜、透射电子显微镜和紫外-可见吸收光谱对样品进行了表征。所制备的样品的平均长度和横截面直径分别约为 1.5μm 和 80nm。通过在水溶液中光降解亚甲基蓝（MB）评价了光催化活性。N 掺杂介孔 TiO2 纳米棒表现出优异的光催化活性，这可能归因于较大的比表面积（106.4m2g-1）和较窄的带隙（2.05eV）。此外，棒状光催化剂易于回收。
