In this article, three types of surface-modified g-C₃N₄ (H⁺/g-C₃N₄, BCQDs/g-C₃N₄, and H⁺/BCQDs/g-C₃N₄) with unique photocatalytic properties have been successfully fabricated by simple and low-cost strategies. The morphology, elemental composition, textural properties, structural information, and photoelectric properties of the as-prepared materials are systematically characterized. Subsequently, the as-prepared materials are applied to Cr(VI) reduction, 4-FP degradation, and simultaneous Cr(VI) reduction with 4-FP degradation photocatalytic systems under normal and anoxic conditions. Based on the photocatalytic test results, we successfully constructed a macro-thermodynamic model to reveal the essential laws of synergistic photocatalytic effects. The constructed macro-thermodynamic model is suitable for complex photocatalytic systems and is of great significance for the application of photocatalytic technology in real wastewater treatment with multiple pollutants.

中文翻译：

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基于宏观热力学模型的表面修饰g-C3N4在简单和复杂污染系统中的协同光催化作用

在本文中，成功地通过以下方法成功制备了三种类型的具有独特光催化性能的表面改性gC ₃ N ₄（H ⁺ / gC ₃ N ₄，BCQDs / gC ₃ N ₄和H ⁺ / BCQDs / gC ₃ N ₄）。简单且低成本的策略。系统地表征了所制备材料的形貌，元素组成，结构性质，结构信息和光电性质。随后，将所制备的材料应用于Cr（VI）还原，4-FP降解以及同时的Cr（VI））在正常和缺氧条件下用4-FP降解光催化系统还原。根据光催化测试结果，我们成功构建了一个宏观热力学模型，以揭示协同光催化作用的基本规律。所建立的宏观热力学模型适用于复杂的光催化体系，对于光催化技术在多污染物实际废水处理中的应用具有重要意义。