TiO2/Ni3[Ge2O5](OH)4复合材料的制备及光催化性能

以Ni₃Ge₂O₅](OH)₄为载体,氟钛酸铵为原料,采用水热辅助液相沉积法制备了纳米TiO₂/ Ni₃Ge₂O₅](OH)₄复合材料。通过X射线衍射(XRD)、拉曼光谱分析(RM)、场发射扫描电子显微镜(FE-SEM)、高分辨透射电镜(HTEM)、紫外-可见吸收光谱(UV-Vis)等表征手段对样品的物相组成、结构特性及微观形貌做了检测分析,并且探究了不同二氧化钛负载量对纳米TiO₂/Ni₃Ge₂O₅](OH)₄复合材料光降解亚甲基蓝能力的影响规律。结果表明,实验实现了纳米TiO₂与Ni₃Ge₂O₅](OH)₄的紧密复合与有效分散,TiO₂为锐钛矿型结构,平均粒径20 nm。该复合材料能够有效抑制光生载流子的复合,改善材料的吸附性能,提高材料的光催化效率。当复合材料中TiO₂与Ni₃Ge₂O₅](OH)₄的摩尔比为3.1∶1时,材料对亚甲基蓝的光催化效率最高,90 min亚甲基蓝的光降解率为99.81％。

Preparation and Photocatalytic Performance of TiO2/Ni3[Ge2O5](OH)4 Composite Material

Using Ni₃Ge₂O₅](OH)₄ as the carrier and ammonium fluorotitanate as the raw material, the nano-TiO₂/Ni₃Ge₂O₅](OH)₄ composite material was prepared by the hydrothermal-assisted liquid phase deposition method. The phase composition, structural characteristics and microscopic morphology were tested and analyzed through X-ray diffraction (XRD), Raman spectroscopy (RM), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HTEM), ultraviolet-visible absorption spectroscopy (UV-Vis) and other characterization methods, and the effect of different loadings of titanium dioxide on the photodegradability of methylene blue of the nano-TiO₂/Ni₃Ge₂O₅](OH)₄ composite material was explored. The results show that the experiment has realized the close combination and effective dispersion of nano-TiO₂ and Ni₃Ge₂O₅](OH)₄. The TiO₂ has an anatase structure with an average particle size of 20 nm. The composite material can effectively inhibit the recombination of photo-generated carriers, improve the adsorption performance of the material, and increase the photocatalytic efficiency of the material. When the molar ratio of TiO₂ to Ni₃Ge₂O₅](OH)₄ in the composite material is 3.1∶1, the material has the highest photocatalytic efficiency for methylene blue, and the photodegradation rate of methylene blue in 90 min is 99.81%.