Abstract In this work, the degradation of terephthalic acid (TA) by vanadium oxide (VxOy) supported on zinc oxide (ZnO) was evaluated in a photocatalytic ozonation treatment based on two UV-A LEDs distributions. TEM analysis and specific surface area measurement suggest that VxOy is not supported on ZnO, while the EDXRF and XPS analysis indicated the presence of VxOy. The XPS analysis on VxOy/ZnO catalyst showed non-significant surface change between fresh and used catalyst. However, ozone decomposition showed a higher reaction rate constant for catalytic (230%) and photocatalytic ozonation (310%) in comparison with single ozone treatment. Photocatalytic ozonation with central and external irradiation arrays was evaluated in TA elimination by a kinetic study. The irradiation arrays had not statistical differences in the TA decomposition or oxalic acid formation. These results suggest that the construction of central bodies inside the reactor could be not necessary for photocatalytic processes.

中文翻译：

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不同 UV-A LED 分布下 VxOy/ZnO 光催化臭氧化分解对苯二甲酸

摘要 在这项工作中，基于两种 UV-A LED 分布，在光催化臭氧化处理中评估了负载在氧化锌 (ZnO) 上的氧化钒 (VxOy) 对对苯二甲酸 (TA) 的降解。TEM 分析和比表面积测量表明 ZnO 不支持 VxOy，而 EDXRF 和 XPS 分析表明存在 VxOy。VxOy/ZnO 催化剂的 XPS 分析表明，新鲜和用过的催化剂之间没有显着的表面变化。然而，与单一臭氧处理相比，臭氧分解显示出更高的催化 (230%) 和光催化臭氧化 (310%) 的反应速率常数。通过动力学研究评估了在 TA 消除中使用中央和外部辐射阵列的光催化臭氧化。辐照阵列在 TA 分解或草酸形成方面没有统计学差异。这些结果表明，在反应器内构建中心体对于光催化过程可能不是必需的。