Sensitized kaolinite with improved visible‐light catalytic activity was prepared via a facile in‐situ growth of nanosized Cu‐TiO₂ on the surface of the sulfated kaolinite impregnated in Cu‐TiO₂ sol. The as‐prepared photocatalysts were characterized in terms of various techniques. The transmission electron microscope and energy dispersive spectrometer results revealed that Cu‐TiO₂ could grow on the surface of the pretreated kaolinite and the aggregation of Cu‐TiO₂ was successfully inhibited. The X‐ray photoelectron spectrum confirmed the formation of AlOTi bonds between Cu‐TiO₂ and sulfated kaolinite in the sensitized kaolinite composite. The sensitized kaolinite composite exhibited significantly improved performance in the degradation of Rhodamine B (RhB), leading to about 87% of RhB degradation in 180 min, which is superior to that of the kaolinite, calcined kaolin, and sulfated calcined kaolin under visible‐light irradiation. The superior photodegradation activity of the sensitized kaolinite composite was primarily attributed to the synergetic effect of Cu‐TiO₂ sensitization and sulfation, resulting from the efficient transfer and separation of the photo‐induced charge carriers between Cu‐TiO₂ and kaolinite.

中文翻译：

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高岭石的可见光驱动光催化活性：被Cu-TiO2原位生长所敏化

通过在Cu-TiO ₂溶胶中浸渍的硫酸化高岭石表面上容易地原位生长纳米尺寸的Cu-TiO ₂来制备具有改善的可见光催化活性的敏化高岭石。根据各种技术对制备的光催化剂进行了表征。透射电子显微镜和能量分散光谱仪结果表明，Cu-TiO ₂可以在预处理的高岭石表面上生长，并成功地抑制了Cu-TiO ₂的聚集。的X射线光电子谱证实的铝形成 ø 的Cu-TIO之间Ti键₂敏化高岭土复合物中的硫酸化高岭石。敏化的高岭石复合物在罗丹明B（RhB）的降解方面表现出显着改善的性能，在180分钟内导致约87％的RhB降解，在可见光下优于高岭石，煅烧高岭土和硫酸煅烧高岭土。辐射。敏化的高岭石复合材料具有优异的光降解活性，这主要归因于Cu-TiO ₂与高岭石之间光致电荷载流子的有效转移和分离，从而引起了Cu-TiO ₂敏化和硫酸化的协同作用。