The nonmetal self-doped N-Ta2O5 photocatalyst with high visible light absorption is synthesized by hydrothermal method.The structure, morphology and optical properties of self-doped N-Ta2O5 were characterized using X-ray diffractometer(XRD), X-ray photoelectron spectroscopy(XPS), scanning electron microscope(SEM), transmission electron microscope (TEM), and UV-vis diffuse reflectance spectra(DRS).The XRD results indicated that the TaN was completely oxidized to Ta2O5 under HF solution.N doping can narrow the band gap of Ta2O5 from 4.0 eV to 2.2 eV by orbital hybridization between N and O atoms, which leads to a strong absorption in the visible light.The high photocatalytic activity can be obtained in N-Ta2O5 with good crystallinity.%我们采用水热法合成了具有可见光吸收的非金属自掺杂N-Ta2O5多孔微球光催化剂.并通过X射线粉末衍射仪(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、紫外可见分光光度计(UV-vis)等多种表征手段对自掺杂N-Ta2O5的晶体结构、形貌、组分等进行了测试分析.XRD结果表明,TaN可以在HF溶液中完全氧化为Ta2O5,N掺杂可以通过N与O原子的轨道杂化使Ta2O5的带隙从4.0 eV降低为2.2 eV,从而增强其可见光吸收.高催化活性的N-Ta2O5可通过调控其结晶度来实现.
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