TiO2核壳介孔微球尺寸与壳层组成对光催化应用中紫外吸收有效性的研究
Study of size and shell composition effect of TiO2 core-shell mesoporous microsphere on UV absorption effectivity for photocatalytic application
AI总结：
本研究利用有限元方法对TiO2中空核壳介孔微球内部的光场进行全波模拟，揭示了微胶囊尺寸、壳层厚度及微观结构对紫外吸收和光催化活性的影响，为已有实验数据提供了物理解释并指出现有理论模型的不足。
摘要：
基于二氧化钛（TiO2）的微分散光催化剂，以具有介孔结构的中空核壳微球（微胶囊）形式存在，在与各种化学品催化、解决环境问题及获取廉价燃料相关的现代关键技术中需求广泛。迄今为止，已知多项实验工作表明，微胶囊的几何参数（尺寸、壳层厚度）以及微观结构组成（纳米金属添加剂、额外的内部介电核——即“蛋黄”）会显著影响其光催化活性。同时，文献中尚未对多孔微胶囊的光学性质给出有价值的物理描述。我们利用有限元方法，对壳层由多个TiO2纳米颗粒组装形成不规则纳米多孔结构的中空微球内部的光场进行了全波模拟。我们对已发表的关于TiO2微胶囊光学活性的实验数据给出了物理解释，并表明现有的理论模型并不总是能对观察到的经验行为给出正确的解释。
英文摘要：
Microdispersed photocatalysts based on titanium dioxide (TiO2) in the form of hollow core-shell microspheres (microcapsules) with mesoporous structure are widely demanded in modern critical technologies related to the catalysis of various chemicals, solving environmental problems, and obtaining cheap fuel. To date, a number of experimental works are known, showing that geometrical parameters of microcapsules (size, shell thickness), as well as microstructural composition (nanosized metal additives, additional inner dielectric core -- the "yolk") noticeably affect their photocatalytic activity. At the same time, a valuable physical description of the optical properties of porous microcapsules has not been presented in the literature so far. Using the finite element method, we perform a full-wave simulation of the optical field inside a hollow microsphere whose shell is assembled from multiple TiO2 nanoparticles to form an irregular nanoporous structure. We give a physical explanation of the published experimental data on the optical activity of titanium-dioxide microcapsules and show that the existing theoretical models do not always give a correct interpretation of the observed empirical behaviors.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
