In the present study, silver phosphate/graphene oxide (Ag₃PO₄/GO) composite was synthesized by ultrasound-precipitation processes. Afterwards, physicochemical properties of the resulting samples were studied through scanning electron microscope, transmission electron microscope, X-ray diffraction, N₂ adsorption/desorption, UV–vis diffuse reflectance spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, surface photovoltage spectroscopy and photoelectrochemical measurements. Results indicated that spherical Ag₃PO₄ displayed an average diameter of 150 nm and body-centered cubic crystal phase, which was integrated with GO. In addition, the visible light absorbance, charge separation efficiency and lifetime of Ag₃PO₄ were significantly improved by integration with GO. In addition, Ag₃PO₄/GO composite was applied to decompose tetrabromosphenol A (TBBPA) in water body. It was found that TBBPA could be completely decomposed within 60 min illumination. Furthermore, several scavenger experiments were conducted to distinguish the contribution of reactive species to the photoctalytic efficiency. Moreover, the enhanced visible light mechanism of Ag₃PO₄/GO was proposed and discussed. Eventually, several PC decomposition pathways of TBBPA were identified including directly debromination and oxidation, and subsequently further oxidation and hydroxylation processes.

中文翻译：

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磷酸银/氧化石墨烯复合材料的合成及其增强的可见光光催化机理和四溴双酚A的降解途径

在本研究中，通过超声沉淀法合成了磷酸银/氧化石墨烯（Ag ₃ PO ₄ / GO）复合材料。之后，通过扫描电子显微镜，透射电子显微镜，X射线衍射，N ₂吸附/解吸，UV-vis漫反射光谱，拉曼光谱，X射线光电子光谱，表面光电压光谱和光电化学测量。结果表明球形Ag ₃ PO ₄显示出150 nm的平均直径和与GO集成的体心立方晶相。另外，通过与GO结合，Ag ₃ PO ₄的可见光吸收率，电荷分离效率和寿命显着提高。另外，应用Ag ₃ PO ₄ / GO复合材料分解水体中的四溴苯酚A（TBBPA）。发现在60分钟的光照下TBBPA可以完全分解。此外，进行了一些清除剂实验，以区分反应物种对光催化效率的贡献。此外，Ag ₃ PO ₄的增强可见光机理/ GO已提出并进行了讨论。最终，确定了TBBPA的几种PC分解途径，包括直接脱溴和氧化，以及随后的进一步氧化和羟基化过程。