Huang Fei, Li Zhen, Yan Aihua, Dong Haiming, Li Qi, Hu Miao, Xiong Xin, Gao Qingyu
Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou 221008, People's Republic of China. School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, People's Republic of China.
Nanotechnology. 2020 May 1;31(18):185201. doi: 10.1088/1361-6528/ab7041. Epub 2020 Jan 27.
Novel trivalent europium (Eu)-doped niobium oxyfluoride (NbOF) nanomaterials with retarded carrier recombination and enhanced photocatalytic activity were successfully synthesized by a facile hydrothermal method. Through changing the doping ratio of Eu ions, the phase, composition, morphology, absorption spectra and photocatalytic properties were investigated in detail. The results showed that Eu ions were successfully incorporated into the interstitial sites of NbOF crystal lattice. With the increase of Eu amounts, the morphology gradually changed from nanowall to irregular nanoparticle. Meanwhile, incorporation of Eu ions had a slight influence on the light absorption. However, Eu-doped samples exhibited excellent photodegradation activity towards Rhodamine B dyes. The improvement may be ascribed to higher specific surface area, and lower carrier recombination prohibited by forming Eu/Eu self-redox centers. This work envisages that Eu-doped NbOF nanomaterials may be a promising kind of photocatalysts.
通过简便的水热法成功合成了具有延缓载流子复合和增强光催化活性的新型三价铕（Eu）掺杂氟氧化铌（NbOF）纳米材料。通过改变Eu离子的掺杂比例，详细研究了其相、组成、形貌、吸收光谱和光催化性能。结果表明，Eu离子成功地掺入到NbOF晶格的间隙位置。随着Eu含量的增加，形貌逐渐从纳米壁变为不规则纳米颗粒。同时，Eu离子的掺入对光吸收有轻微影响。然而，Eu掺杂样品对罗丹明B染料表现出优异的光降解活性。这种改善可能归因于更高的比表面积，以及通过形成Eu/Eu自氧化还原中心抑制了较低的载流子复合。这项工作设想Eu掺杂的NbOF纳米材料可能是一种有前途的光催化剂。
