Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.
Faculty of Science, Energy and Environment, King Mongkut's University of Technology North Bangkok, Rayong Campus, Rayong, 21120, Thailand.
Sci Rep. 2023 Mar 23;13(1):4742. doi: 10.1038/s41598-022-26442-1.
AgPO/AgPO photocatalysts were successfully synthesized by microwave-hydrothermal method. Tuning the properties of photocatalysts was achieved using different amount of acetic acid (CHCOOH) and sodium hydroxide (NaOH) to adjust pH value of precursor solution (pH = 4, 7, 10 and 12). The crystal structure, morphology and optical property of samples were characterized and explained. The photocatalytic activity of sample was determined by degradation of rhodamine B (RhB) and methyl orange (MO) under a wavelength range of 350-700 nm irradiation. The results demonstrated that the change in shape of particles was not observed whereas the average particle size was decreased with increasing pH value because of the high hydroxide ions (OH). The sample synthesized in the solution with the pH of 10 exhibited excellent photocatalytic performance and stability because of the highest surface area and the present of AgPO on the surface of particles. The highest photodegradation efficiency was 99.34 and 96.12% by degrading RhB and MO, respectively. The enhancement of photocatalytic performance of AgPO/AgPO was discussed. The active species trapping experiments showed that the h was the main active species to decompose the dye molecules.
AgPO/AgPO 光催化剂通过微波水热法成功合成。通过使用不同量的乙酸（CHCOOH）和氢氧化钠（NaOH）来调节前驱体溶液的 pH 值（pH=4、7、10 和 12），从而调节光催化剂的性能。对样品的晶体结构、形态和光学性质进行了表征和解释。通过在 350-700nm 照射下测定罗丹明 B（RhB）和甲基橙（MO）的降解来确定样品的光催化活性。结果表明，由于高浓度的氢氧根离子（OH），颗粒的形状没有发生变化，但是平均粒径随着 pH 值的增加而减小。在 pH 值为 10 的溶液中合成的样品由于具有最高的比表面积和颗粒表面上存在的 AgPO，表现出优异的光催化性能和稳定性。通过降解 RhB 和 MO，分别获得了 99.34%和 96.12%的最高光降解效率。讨论了 AgPO/AgPO 光催化剂性能增强的原因。活性物种捕获实验表明，h 是分解染料分子的主要活性物质。
