Abstract Indigo carmine in aqueous solution was effectively degraded using ZnO-Bi2O3/Graphitic Carbon Nitride heterojunction structure by visible light/H2O2 system. The mechanism of photocatalytic degradation of Indigo carmine shows the responsible species for the degradation of Indigo carmine in the ZnO-Bi2O3-xC3N4/H2O2/visible light system (x = 0, 1, 2, and 3) is the hydroxyl radicals which were generated from the reaction of e− and h+ with H2O2. Under optimal conditions, ZnO-Bi2O3-2C3N4/H2O2/Vis system degraded more than 93% of Indigo carmine in 180 min. Besides, the kinetic of the photocatalytic process was detailed. These results demonstrate that the ZnO-Bi2O3-2C3N4/H2O2/visible light system may become a promising approach to achieve efficient environmental remediation as an environmentally friendly oxidant.

中文翻译：

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可见光下H2O2辅助增强降解靛蓝胭脂红的ZnO-Bi2O3/石墨碳氮化物光催化体系

摘要 ZnO-Bi2O3/石墨碳氮化物异质结结构在可见光/H2O2体系下可有效降解水溶液中的靛蓝胭脂红。靛蓝胭脂红的光催化降解机理表明，在 ZnO-Bi2O3-xC3N4/H2O2/可见光系统（x = 0、1、2 和 3）中降解靛蓝胭脂红的主要物种是产生的羟基自由基来自 e- 和 h+ 与 H2O2 的反应。在最佳条件下，ZnO-Bi2O3-2C3N4/H2O2/Vis 体系在 180 分钟内降解了 93% 以上的靛蓝胭脂红。此外，详细介绍了光催化过程的动力学。这些结果表明，ZnO-Bi2O3-2C3N4/H2O2/可见光系统作为一种环境友好的氧化剂可能成为实现有效环境修复的有前途的方法。