Despite high activity for photocatalytic degradation of organic dyes from water, nanoscale Ag₃PO₄ photocatalyst particles are difficult to synthesize. As reported in literature, Ag₃PO₄ particle sizes for photocatalytic degradation of water pollutants are normally larger than 100nm. This research reports a facile and reproducible method for the synthesis of the ultrafine and uniform Ag₃PO₄ nanoparticles loaded on the oxygen vacated TiO₂ (TiO₂-OV) with average particle size as small as 2.6nm. All obtained Ag₃PO₄ particles can be completely loaded onto TiO₂-OV support to form Ag₃PO₄/TiO₂-OV composite photocatalysts. The prepared Ag₃PO₄/TiO₂-OV photocatalyst exhibits much higher visible light photocatalytic activity than those of pure Ag₃PO₄ or Ag₃PO₄/TiO₂ photocatalysts for the degradation of rhodamine b (Rh B) and phenol in water. After depositing thin layers of AgI on Ag₃PO₄ ultrafine Ag₃PO₄ nanoparticles, the new AgI-Ag₃PO₄/TiO₂-OV composite photocatalysts not only show much higher photocatalytic activity, but they are also more stable than pure Ag₃PO₄ catalyst. This new synthesis method will provide guidelines for the preparation of ultrafine nanoparticles and highly active photocatalysts for treatment of water pollution or production of hydrogen from water splitting/reducing.

中文翻译：

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超细Ag3PO4纳米粒子的合成及其对空气TiO2的光催化活性。

尽管从水中光催化降解有机染料具有高活性，但纳米级Ag ₃ PO ₄光催化剂颗粒难以合成。如文献报道，用于光催化降解水污染物的Ag ₃ PO ₄粒径通常大于100nm。这项研究报告了一种简便且可重现的合成超细且均匀的Ag ₃ PO ₄纳米颗粒的方法，该纳米颗粒负载在平均粒径小至2.6nm的空氧TiO ₂（TiO ₂ -OV）上。所有获得的Ag ₃ PO ₄颗粒都可以完全负载到TiO _2上-OV载体形成Ag ₃ PO ₄ / TiO ₂ -OV复合光催化剂。制备的Ag ₃ PO ₄ / TiO ₂ -OV光催化剂在水中若丹明b（Rh B）和苯酚的降解方面比纯Ag ₃ PO ₄或Ag ₃ PO ₄ / TiO ₂光催化剂具有更高的可见光催化活性。 。在Ag ₃ PO ₄超细Ag ₃ PO ₄纳米颗粒上沉积AgI薄层后，新的AgI-Ag ₃ PO ₄ / TiO ₂-OV复合光催化剂不仅显示出更高的光催化活性，而且比纯Ag ₃ PO ₄催化剂更稳定。这种新的合成方法将为制备超细纳米颗粒和高活性光催化剂提供指导方针，以用于水污染的处理或水分解/还原过程中产生的氢气。