Evaluation and quantification of the effects of the carbonation process on photocatalytic activity are essential for the long-term functional assurance of nano TiO₂ modified photocatalytic concrete. This work focuses on the photocatalytic self-cleaning performance variation of mortar containing different dosages of nano TiO₂ hydrosol at different carbonization duration. The colourimetric analysis is used to evaluate the self-cleaning performances of carbonated mortar samples. The distribution areas of anatase TiO₂, hydrates, and carbonates in the mortar surface are characterized by the Confocal Raman Microscopy. The data recorded during the 28 days of carbonation show that the self-cleaning performance of mortar surfaces features a recovery phenomenon during carbonation. The correlations between photocatalytic self-cleaning performance and the possible parameters are analysed. A predictive model is suggested to evaluate the influence of carbonation degree on the photocatalytic self-cleaning ability of nano TiO₂ hydrosol modified mortar.

_{评估和量化碳化过程对光催化活性的影响对于纳米 TiO 2}改性光催化混凝土的长期功能保证至关重要。本工作重点研究了不同碳化时间下不同用量的纳米TiO ₂水溶胶砂浆的光催化自洁性能变化。比色分析用于评价碳酸砂浆样品的自洁性能。锐钛矿TiO _{2的分布区域}砂浆表面的水合物和碳酸盐通过共焦拉曼显微镜进行表征。28天碳化记录的数据表明，砂浆表面的自洁性能在碳化过程中具有恢复现象。分析了光催化自清洁性能与可能参数之间的相关性。提出了一种预测模型来评估碳化程度对纳米TiO ₂水溶胶改性砂浆光催化自洁能力的影响。