The optical properties of suspensions of P25 TiO2 photocatalyst are calculated with particulate-aggregates-based light scattering model. The effects of structure, number of monomer, and particle radius of cluster on the absorption and scattering coefficients are analyzed. It is found that the radius of particle in clusters significantly affects their scattering capacity, and this effect could be attributed to the dielectric resonance of single particle and the cooperative scattering caused by coupling of electric dipoles of adjacent particles. Our work may promote the understanding of interaction between light and photocatalysts.

中文翻译：

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颗粒聚集体光散射模型对TiO ₂光催化剂悬浮液光学性质的数值研究

用基于颗粒聚集体的光散射模型计算了P25 TiO2光催化剂悬浮液的光学性质。分析了结构，单体数量和团簇颗粒半径对吸收系数和散射系数的影响。发现簇中粒子的半径显着影响其散射能力，并且这种影响可归因于单个粒子的介电共振和相邻粒子的电偶极耦合引起的协同散射。我们的工作可能会促进对光与光催化剂之间相互作用的理解。