Abstract A H2O2-free photo-Fenton reaction was proposed for degradation of organic pollutants on thermally exfoliated g-C3N4 using Rhodamine B (RhB) as a model organic compounds without external addition of H2O2. Compared with conventional photocatalytic degradation of RhB in absence of ferric ions, the photo-Fenton process exhibited accelerated speed and the remove efficiency reached ˜100% within 2 h. More importantly, the kinetics of photo-Fenton reaction is different from that of photocatalytic process. The photo-Fenton degradation conforms to pseudo-first-order kinetics while the photocatalytic reaction conforms to pseudo-zero-order kinetics according to RhB concentration. Based on the results of photoluminescence (PL), electrochemical impedance spectra (EIS) and scavenger experiments, detailed mechanism steps were established to give a satisfied explanation for the observed accelerated speed and different kinetics of photo-Fenton degradation of RhB compared with photocatalytic process.

中文翻译：

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H2O2-free photo-Fenton 降解热剥离 g-C3N4 上的有机污染物

摘要 使用罗丹明 B (RhB) 作为模型有机化合物，在不添加 H2O2 的情况下，提出了一种不含 H2O2 的光芬顿反应，用于降解热剥离的 g-C3N4 上的有机污染物。与在没有铁离子的情况下对 RhB 的常规光催化降解相比，光芬顿过程表现出更快的速度并且在 2 小时内去除效率达到约 100%。更重要的是，光芬顿反应的动力学不同于光催化过程。根据RhB浓度，光-芬顿降解符合准一级动力学，而光催化反应符合准零级动力学。基于光致发光（PL）、电化学阻抗谱（EIS）和清除剂实验的结果，