为了制备在高温焙烧后能保持良好管形结构的可见光响应的,TiO2纳米管,通过NH4Cl水—溶剂热和Ni(NO3)2浸渍法对传统水热法合成的TiO2纳米管进行掺氮和掺镍改性.通过X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、紫外-可见漫反射(UV-vis DRS)和荧光光谱(PL)等方法对样品进行了表征,并以甲基橙(MO)为光催化降解模型,考察了可见光下制备的样品的光催化性能.结果表明,NH4Cl水-溶剂热掺氮处理可提高TiO2纳米管的管状结构的热稳定性；氮镍共掺杂元素之间的协同作用增强了催化剂对可见光的吸收能力,并且能有效地抑制光生电子空穴的复合,Ni/Ti添加量为0.3％的催化剂具有较高的光催化活性.可见光照射210 min,氮镍共掺杂TiO2纳米管对MO的可见光降解率比单独氮和镍掺杂的TiO2分别提高了9.1％和21.2％.
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