Abstract Dye removal from water via photocatalytic technologies has attracted considerable attention. In this study, Z-scheme V2O5/P-g-C3N4 photocatalytic materials were prepared by heat treatment and characterized by a series of characterization methods. Under the visible light irradiation condition, the degradation performance of the prepared V2O5/P-g-C3N4 photocatalytic material for methyl orange (MO) removal was investigated. The results indicated that the V2O5/P-g-C3N4 Z-scheme heterostructure exhibited the best apparent rate of degrading MO: 14.5 and 3.7 times higher than those of V2O5 and P-C3N4 when they were separately used. The free radical capture and electron spin resonance (ESR) experiments confirmed that h + and ∙ O 2 - were the primary active species in the photocatalytic degradation of MO by V2O5/P-g-C3N4 Z-scheme heterogeneous photocatalytic materials. The improvement of catalytic activity was primarily attributed to the formation of a V2O5/P-g-C3N4 Z-scheme heterojunction, which effectively separated the photoexcited electron–hole pairs and improved the reaction efficiency. This study affords a simple strategy for preparing the photocatalytic material, a V2O5/P-g-C3N4 Z-scheme heterojunction, and avails a new method for the MO removal from water.

中文翻译：

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V2O5/Pg-C3N4 Z-scheme增强可见光照射下多相光催化去除水中甲基橙

摘要 光催化技术从水中去除染料引起了广泛关注。本研究通过热处理制备Z-scheme V2O5/Pg-C3N4光催化材料，并通过一系列表征方法对其进行表征。在可见光照射条件下，研究了制备的 V2O5/Pg-C3N4 光催化材料对甲基橙（MO）去除的降解性能。结果表明，V2O5/Pg-C3N4 Z-scheme异质结构表现出最佳的降解MO的表观速率：分别比V2O5和P-C3N4分别高14.5和3.7倍。自由基捕获和电子自旋共振 (ESR) 实验证实 h + 和 ∙ O 2 - 是 V2O5/Pg-C3N4 Z 型多相光催化材料光催化降解 MO 的主要活性物质。催化活性的提高主要归因于形成了 V2O5/Pg-C3N4 Z 型异质结，有效分离了光激发电子-空穴对，提高了反应效率。该研究为制备光催化材料 V2O5/Pg-C3N4 Z 型异质结提供了一种简单的策略，并提供了一种从水中去除 MO 的新方法。有效地分离了光激发的电子-空穴对，提高了反应效率。该研究为制备光催化材料 V2O5/Pg-C3N4 Z 型异质结提供了一种简单的策略，并提供了一种从水中去除 MO 的新方法。有效地分离了光激发的电子-空穴对，提高了反应效率。该研究为制备光催化材料 V2O5/Pg-C3N4 Z 型异质结提供了一种简单的策略，并提供了一种从水中去除 MO 的新方法。