二氧化钛微球制备及其光催化降解亚甲基蓝染料的研究

Preparation of Titanium Dioxide Microspheres and Their Photocatalytic Degradation of Methylene Blue Dye

摘要: 本研究采用硅油两步脱水法成功制备二氧化钛(TiO₂)微球，并评估了其在光催化降解亚甲基蓝染料中的应用效果。以TiO₂纳米粒子水分散液为原料，通过在硅油中进行两次脱水过程获得直径尺寸为1~100 μm的TiO₂微球。利用扫描电子显微镜(SEM)、X射线衍射(XRD)、X射线光电子能谱仪(XPS)及光学显微镜等手段对合成的微球进行了详细的形貌和结构表征。光催化性能评估结果表明，制备的TiO₂微球具有优异的光催化活性，在光照4 h后，对亚甲基蓝的降解率可达86%。硅油两步脱水法不仅提供了一种制备高效TiO₂微球的简便、高效方法，所得催化剂在染料废水处理方面也展现出卓越性能，为环境污染治理提供了可行的解决方案。

Abstract: In this study, titanium dioxide (TiO₂) microspheres were successfully prepared using a two-step dehydration method with silicone oil, and their application in the photocatalytic degradation of methylene blue dye was evaluated. Using a TiO₂ nanoparticle aqueous dispersion as the raw material, TiO₂ microspheres with diameters ranging from 1 to 100 μm were obtained through two dehydration steps in silicone oil. The synthesized microspheres were thoroughly characterized in terms of morphology and structure using scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and optical microscopy. The photocatalytic performance evaluation results demonstrate that the prepared TiO₂ microspheres exhibit excellent photocatalytic activity, achieving a degradation efficiency of 86% for methylene blue after 4 hours of light irradiation. The two-step dehydration method using silicone oil not only provides a simple and efficient approach for preparing high-performance TiO₂ microspheres but also demonstrates the outstanding potential of the resulting catalyst in dye wastewater treatment, offering a feasible solution for environmental pollution remediation.