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采用水热法在FTO玻璃上制备了TiO2纳米棒阵列,然后在氨气和氩气的混合气体中退火,得到氮掺杂TiO2纳米棒阵列。XRD及SEM测试结果表明产物均为金红石相,TiO2纳米棒阵列为倾斜生长在FTO衬底上,掺杂氮对产物的结构及形貌没有大的改变。XPS研究结果表明,N原子是以代替O原子的形式渗入TiO2纳米棒。通过光电化学研究,掺杂氮的TiO2纳米棒阵列比TiO2纳米棒阵列的光电流密度增加了66%。
An array of TiO2 nanorods was prepared on FTO glass by hydrothermal method and then annealed in a mixed gas of ammonia and argon to obtain a nitrogen-doped TiO2 nanorod array. The results of XRD and SEM indicate that the products are both rutile and the TiO2 nanorod arrays grow obliquely on the FTO substrate. The structure and morphology of the products do not change much with doping nitrogen. XPS results show that N atoms penetrate into TiO2 nanorods instead of O atoms. Through photoelectrochemical studies, the photocurrent density of the nitrogen-doped TiO2 nanorod arrays increased by 66% than that of the TiO2 nanorod arrays.