作　　者： ; ; ; ;

机构地区： 扬州大学环境科学与工程学院

出　　处： 《化学学报》 2010年第16期1603-1608,共6页

摘　　要： 分别以氨水、乙二胺、丁胺为氮源,利用阳极氧化法和湿化学法合成氮掺杂的二氧化钛(TiO2)纳米管阵列.通过扫描电镜(SEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)等表征方法对氮掺杂TiO2纳米管形貌,晶型和氮元素掺杂方式进行分析,并通过可见光光催化降解六氯苯(HCB)废水,研究氮元素掺杂方式与可见光光催化活性的关系.结果表明有序排列的TiO2纳米管阵列垂直生长在钛基底表面,管长500nm左右,管径100nm左右.氮元素掺杂阻碍了TiO2晶粒的增长,抑制了锐钛矿向金红石相的转变.无机氮比有机氮更加利于氮元素进入TiO2晶格,取代态氮比间隙态氮表现出更高的可见光光催化活性. Different nitrogen doped titanium dioxide （TiO2） nanotube arrays were preformed by electrochemical anodization and wet chemical method by using ammonia, ethylenediamine, butylamine as nitrogen source respectively. The samples were characterized by scanning electron microscope （SEM）, X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPS）. The relationship between nitrogen doping behavior and visible light photocatalytic property was studied by the experiment of degradation of hexachlorobenzene （HCB） wastewater. The result indicated that highly ordered TiO2 nanotube arrays were grown on titanium substrates, the length of the tube was approximately 500 nm and the diameter was about 100 nm. The doping of N hindered the growth of crystalline particles and prevented the crystal of TiO2 transferred from anatase to rutile. The photocatalytic experiments indicated that inorganic nitrogen was more conducive to let nitrogen access to TiO2 lattice and substitute nitrogen had higher visible light photocatalytic activity than interstitial nitrogen.

关 键 词： 纳米管阵列 氮掺杂 光催化 六氯苯

领　　域： [化学工程]