Wang Zaiqin, Liang Hui, Liao Lingmin, Chen Liang, Li Zhen, Feng Jing
Changjiang River Scientific Research Institute, Wuhan 430010, P. R. China; Research Center on National Dam Safety Engineering Technology, Wuhan 430010, P. R. China; Research Center of Water Engineer Security and Disease Prevent, Ministry of Water Resources, Wuhan 430010, P. R. China.
J Nanosci Nanotechnol. 2018 Aug 1;18(8):5726-5730. doi: 10.1166/jnn.2018.15403.
In this paper, zeolite supported-nano TiO2 photocatalytic composites were synthesized by an easily-operated solid diffusion process, in which zeolite was used as the support matrix. And the microstructures, morphologies and photocatalytic properties of the zeolite supported-nano TiO2 composites were characterized and analyzed by scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, UV-visible spectroscopy, fluorescence spectroscopy and methylene blue degradation tests. The results showed that zeolite matrix reduced agglomeration of nano-TiO2 and enhanced the absorption ability within the UV-Vis range, consequently increased the photocatalytic activity of the composites. Meanwhile, the influences of TiO2/zeolite proportion on their photocatalytic performances were explored, which indicated that 90 wt% TiO2/zeolite had optimal photocatalytic capability and stable properties.
本文通过一种易于操作的固体扩散法合成了以沸石为载体的纳米TiO₂光催化复合材料，其中沸石用作载体基质。采用扫描电子显微镜、透射电子显微镜、X射线光电子能谱、紫外可见光谱、荧光光谱和亚甲基蓝降解试验对该复合材料的微观结构、形貌和光催化性能进行了表征和分析。结果表明，沸石基质减少了纳米TiO₂的团聚，增强了紫外-可见范围内的吸收能力，从而提高了复合材料的光催化活性。同时，探讨了TiO₂/沸石比例对其光催化性能的影响，结果表明90 wt% TiO₂/沸石具有最佳的光催化能力和稳定的性能。
