This present paper evaluates the functionality of different TiO₂ coatings deposited on the exposed surface of Portland cement pastes. Cement pastes coated from a crystalline TiO₂ suspension (CS) and an amorphous TiO₂ solution (AS) were compared. Some samples with film deposition from AS were submitted to autoclave treatment. Film deposition was carried out by spin-coating with 1, 2, 3 or 5 coating layers. The coating morphology was observed by SEM and the possible presence of TiO₂ crystalline phase was confirmed by XRD. Static water contact angle and RhB degradation were used to assess the photo-induced activity of the films. All the films deposited from CS exhibits both photo-induced superhydrophilicity and photoactivity. The samples coated from AS display only a minor increase in the rate of degradation of rhodamine B. The results suggest that the autoclave treatment did not favor the formation of crystalline TiO₂ phases.

本文评估了沉积在硅酸盐水泥浆裸露表面上的不同TiO ₂涂层的功能。比较了由结晶TiO ₂悬浮液（CS）和无定形TiO ₂溶液（AS）涂覆的水泥浆。一些来自AS的薄膜沉积样品被送去高压灭菌器处理。通过旋涂1、2、3或5个涂层进行膜沉积。通过SEM观察涂层的形态以及可能存在的TiO ₂通过XRD确认结晶相。静态水接触角和RhB降解用于评估薄膜的光诱导活性。从CS沉积的所有薄膜均显示出光诱导的超亲水性和光活性。从AS涂覆的样品仅显示出罗丹明B降解速率的微小增加。结果表明，高压釜处理不利于TiO ₂结晶相的形成。