Abstract Because hydroxyapatite (HAp) shows the unique adsorption property, we speculate that HAp is a suitable catalyst supports. In this study, TiO2 nanoparticles are dispersed on HAp (TiO2-modified HAp) that was synthesized by hydrothermal treatment using urea. Using acid fuchsin (AF), the photocatalytic decolouration and adsorption tests were performed to investigate the effects of HAp characteristics and compositions. The morphology of HAp was changed from needle- to sponge-shaped by increasing the urea concentration. Concurrently, the TiO2 nanoparticle formed on the HAp. The photocatalytic decolouration rate of TiO2-modifed HAp with sponge-shaped crystals, which shows a high surface area and high zeta potential, was slightly higher than the rate in the presence of needle-shaped crystals. Therefore, this study discusses the effects of the HAp morphology and TiO2 nanoparticle count properties that influences adsorption properties. This information can be used to produce more efficient adsorption materials and processes.

中文翻译：

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尿素辅助水热法合成 TiO2 改性羟基磷灰石的光催化性能和可控形貌

摘要 由于羟基磷灰石(HAp) 显示出独特的吸附性能，我们推测HAp 是一种合适的催化剂载体。在这项研究中，TiO2 纳米颗粒分散在 HAp（TiO2 改性的 HAp）上，该 HAp 是使用尿素水热处理合成的。使用酸性品红 (AF)，进行光催化脱色和吸附试验，以研究 HAp 特性和组成的影响。随着尿素浓度的增加，HAp 的形态从针状变为海绵状。同时，在HAp上形成TiO2纳米颗粒。具有高表面积和高 zeta 电位的海绵状晶体 TiO2 改性 HAp 的光催化脱色速率略高于存在针状晶体的速率。所以，本研究讨论了影响吸附特性的 HAp 形态和 TiO2 纳米颗粒计数特性的影响。该信息可用于生产更有效的吸附材料和工艺。