Heterogeneous photocatalysis has caught attention in scientific community as an alternative and sustainable approach for environmental remediation. With that said, it is still a challenge to find affordable, photostable, harmless and chemically inert catalysts. In the present study, a novel visible light-responsive hybrid photocatalyst (AgBr/PSGCN-100) was synthesized via in-situ deposition precipitation that combines the phosphorus and sulfur co-doped graphitic carbon nitride (PSGCN) and AgBr particles. The as-synthesized samples were successfully characterized by various techniques including XRD, FT-IR, SEM, TEM, XPS, UV–vis DRS and PL. Compared to the other as-prepared samples and single photocatalysts, AgBr/PSGCN-100 performed well in terms of IBF photodegradation. Using 0.1 g AgBr/PSGCN-100, 0.5 mg/l, 1 mg/l, and 5 mg/l of IBF were completely degraded just in 20, 30, and less than 60 min of visible light irradiation, respectively; whereas 90% efficiency was achieved with increased IBF concentration (15 mg/L) in 100 min. As per trapping scavenger studies, the holes (h⁺) and superoxide radicals (•O₂⁻) were the predominant reactive oxygen species for IBF degradation. However, hydroxyl radicals (•OH) also played a significant role. The good photocatalytic performance of AgBr/PSGCN-100 was linked to its heterostructure form. IBF intermediate products were analyzed by LC/MS-MS used negative electrospray ionization mode (ESI). We believe this study to be insightful in the rational design and best conception of heterostructure photocatalysts for environmental applications.

多相光催化作为一种​​替代且可持续的环境修复方法已引起科学界的关注。话虽如此，找到负担得起的、光稳定的、无害的和化学惰性的催化剂仍然是一个挑战。在本研究中，通过结合磷和硫共掺杂的石墨氮化碳 (PSGCN) 和 AgBr 颗粒的原位沉积沉淀法合成了一种新型的可见光响应混合光催化剂 (AgBr/PSGCN-100)。合成后的样品通过各种技术成功表征，包括 XRD、FT-IR、SEM、TEM、XPS、UV-vis DRS 和 PL。与其他制备的样品和单一光催化剂相比，AgBr/PSGCN-100 在 IBF 光降解方面表现良好。使用 0.1 g AgBr/PSGCN-100、0.5 mg/l、1 mg/l，分别在可见光照射 20 分钟、30 分钟和不到 60 分钟的时间内完全降解了 5 mg/l 的 IBF；而在 100 分钟内增加 IBF 浓度 (15 mg/L) 可实现 90% 的效率。根据诱捕清道夫研究，孔（h⁺ ) 和超氧自由基 (•O ₂ ^- ) 是 IBF 降解的主要活性氧物质。然而，羟基自由基 (•OH) 也发挥了重要作用。AgBr/PSGCN-100 的良好光催化性能与其异质结构形式有关。通过使用负电喷雾电离模式 (ESI) 的 LC/MS-MS 分析 IBF 中间产物。我们相信这项研究对环境应用异质结构光催化剂的合理设计和最佳概念具有深刻的意义。