College of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyun 558000, China.
College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China.
J Nanosci Nanotechnol. 2019 Dec 1;19(12):7758-7763. doi: 10.1166/jnn.2019.16733.
A novel Eu-TiO₂ nanocomposite prepared by a sol-gel method is used for the degradation of rhodamine B (RhB) present in dyes wastewater. The X-ray diffraction (XRD), Raman spectroscopy and transmission electron microscopy (TEM) show the anatase phase and globular shape of Eu- TiO₂ nanocomposite, UV-vis diffuse reflectance spectroscopy and low temperature N₂ adsorption (BET) indicate Eu-TiO₂ possesses a narrow band gap (2.98 eV) and a high specific surface area (112.1 m² · g), respectively. Furthermore, the prepared Eu-TiO₂ exhibits unprecedented higher photocatalytic activity towards RhB than P25 TiO₂. The degradation ratio of RhB is up to 93% within 100 min irradiation of simulated solar lights by the obtained Eu-TiO₂, which demonstrated firstly by the matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis. The high photocatalytic performance may be ascribed to the efficient Eu loading in favor of the absorption of visible-light and the separation of photogenerated charges.
采用溶胶-凝胶法制备了一种新型的 Eu-TiO₂ 纳米复合材料，用于降解染料废水中的罗丹明 B（RhB）。X 射线衍射（XRD）、拉曼光谱和透射电子显微镜（TEM）表明 Eu-TiO₂ 纳米复合材料为锐钛矿相和球形，紫外-可见漫反射光谱和低温 N₂吸附（BET）分别表明 Eu-TiO₂ 具有较窄的带隙（2.98 eV）和较高的比表面积（112.1 m²·g）。此外，所制备的 Eu-TiO₂ 对 RhB 的光催化活性比 P25 TiO₂ 高得多。在模拟太阳光照射 100 min 内，通过基质辅助激光解吸/电离飞行时间质谱（MALDI-TOF MS）分析，Eu-TiO₂ 对 RhB 的降解率高达 93%。高的光催化性能可能归因于 Eu 的高效负载有利于可见光的吸收和光生电荷的分离。
