Silver vanadium oxides have received remarkable attention in recent years because of their stability, suitable band gaps, and relatively superior photocatalytic abilities. This study reports the synthesis of silver vanadates by the hydrothermal method and the investigation of their photocatalytic abilities for removing crystal violet (CV) and atrazine pollutants under visible-light irradiation. The as-prepared silver vanadates are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV–vis diffuse reflectance spectra (DRS). Crystal violet and atrazine could be successfully degraded in the presence of the silver vanadate catalyst under visible-light irradiation. The obtained results show complete degradation of crystal violet after 24 h of treatment and over 97% degradation of atrazine after 72 h. The as-prepared silver vanadate materials show extremely high catalytic stability and maintain stable activity after three catalytic cycles. The scavenger studies indicate that O₂⁻ radicals are the main active species in the degradations of CV and atrazine, while OH and h⁺ play an assistant role in these processes. Liquid chromatography coupled with electrospray ionization mass spectrometry is used to analyze the samples obtained from the photocatalytic degradation of CV and atrazine. The degradation pathways of atrazine are evaluated suggesting two different routes including dechlorination–hydroxylation and alkylic-oxidation–de-alkylation. On the other hand, the degradation of the CV takes place via N-de-methylation in a stepwise manner generating the various N-de-methylated intermediate CV species. The excellent activity and photostability reveal that silver vanadates (including Ag₄V₂O₇) are promising visible-light-responsive photocatalysts for water and wastewater treatment.

近年来，银钒氧化物因其稳定性，合适的带隙和相对优异的光催化能力而受到了广泛的关注。这项研究报道了水热法合成钒酸银，并研究了它们在可见光照射下去除结晶紫（CV）和investigation去津污染物的光催化能力。所制备的钒酸银的特征在于X射线衍射（XRD），扫描电子显微镜（SEM），X射线光电子能谱（XPS）和紫外可见漫反射光谱（DRS）。在可见光照射下，在钒酸银催化剂存在下，结晶紫和at去津可以成功降解。获得的结果显示，处理24小时后，结晶紫完全降解，而72小时后，at去津的降解率超过97％。所制备的钒酸银材料显示出极高的催化稳定性，并在三个催化循环后保持稳定的活性。清道夫研究表明Ø ₂ ^-基是在简历和莠去津的降解的主要活性物质，而OH和H ⁺发挥在这些过程中的辅助作用。液相色谱与电喷雾电离质谱联用，用于分析由CV和r去津的光催化降解而获得的样品。对at去津的降解途径进行了评估，表明存在两种不同的途径，包括脱氯-羟基化和烷基氧化-脱烷基化。另一方面，CV的降解是通过N-去甲基化逐步发生的，从而产生各种N-去甲基化的中间CV物种。优异的活性和光稳定性表明，钒酸银（包括Ag ₄ V ₂ O ₇）是用于水和废水处理的有希望的可见光响应型光催化剂。