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为了提高氧化锌(ZnO)的光催化性能,通过水热法制备了不同钕(Nd)掺杂量的ZnO。X射线衍射分析(XRD)和光电子能谱(XPS)测试说明钕原子成功地掺杂进入了ZnO晶格。XRD图谱还说明了粉末具有各向异性。光致发光(PL)图谱在可见光区域出现较宽范围的强峰。Nd掺杂使得可见光发射强度增强。光催化性能通过降解甲基橙溶液进行测试。研究发现Nd掺杂使得氧化锌的光催化性能得到提高,当掺杂Nd的摩尔分数为3%时,其光催化性能最佳。Nd掺杂引起的电子空穴对的增加以及诱导产生的置换氧缺陷(OZn)和间隙氧缺陷(Oi)使得可见光发射增强和光催化性能得到提高。
In order to improve the photocatalytic activity of zinc oxide (ZnO), different amounts of neodymium (Nd) doped ZnO were prepared by hydrothermal method. X-ray diffraction (XRD) and photoelectron spectroscopy (XPS) tests showed that neodymium atoms were successfully doped into the ZnO lattice. The XRD pattern also shows the anisotropy of the powder. Photoluminescence (PL) patterns show a wide range of strong peaks in the visible region. Nd doping makes visible light emission intensity increased. Photocatalytic performance was tested by degradation of methyl orange solution. The results show that Nd doping can improve the photocatalytic activity of zinc oxide. When the mole fraction of Nd is 3%, the photocatalytic activity is the best. The increase of electron-hole pairs caused by Nd doping and induced oxygen vacancies (OZn) and interstitial oxygen defects (Oi) resulted in enhanced visible light emission and improved photocatalytic performance.