Abstract Decorating inorganic particles with core-shell structure is an attractive approach to broaden their practical application owing to the synergistic effects between inner core and outer shell. In this work, a novel rutile TiO2@AlPO4 core-shell composite has been constructed via a facile one-step wet chemical deposition method. The dense and thick AlPO4 shell can hinder direct contact between TiO2 core and outer environment, decrease light absorption ability, suppress separation of electron-hole pairs, and accelerate electron annihilation. Such unique properties hindered the generation of reactive oxygen species, further contributing to the suppression of photoactivity. The superior dispersion stability in aqueous system of TiO2@AlPO4 core-shell hybrid was attributed to its enhanced surface electronegativity. Thus-produced TiO2@AlPO4 core-shell hybrid with suppressed photoactivity and enhanced dispersion stability could further increase the weather durability and prolong the life span of TiO2-based pigment. Overall, this study provides new insight into the mass production of multi-functional rutile TiO2 pigments.

中文翻译：

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一种新型金红石型 TiO2/AlPO4 核壳颜料，具有显着抑制的光活性和增强的分散稳定性

摘要 由于内核和外壳之间的协同作用，用核壳结构装饰无机颗粒是拓宽其实际应用的一种有吸引力的方法。在这项工作中，通过简单的一步湿化学沉积方法构建了一种新型的金红石型 TiO2@AlPO4 核壳复合材料。致密而厚的AlPO4壳层会阻碍TiO2核与外部环境的直接接触，降低光吸收能力，抑制电子-空穴对的分离，加速电子湮灭。这种独特的性质阻碍了活性氧的产生，进一步抑制了光活性。TiO2@AlPO4 核壳杂化材料在水性体系中优异的分散稳定性归因于其增强的表面电负性。由此产生的具有抑制光活性和增强分散稳定性的 TiO2@AlPO4 核壳杂化可以进一步提高耐候性并延长 TiO2 基颜料的寿命。总体而言，这项研究为多功能金红石二氧化钛颜料的大规模生产提供了新的见解。