光催化
化学
激进的
石墨氮化碳
碳纤维
降级(电信)
反应速率常数
材料科学
光化学
污染物
催化作用
氧气
氮化碳
有机化学
动力学
复合数
物理
电信
复合材料
量子力学
计算机科学
作者
Yang Wu,Juan Chen,Huinan Che,Xin Gao,Yanhui Ao,Peifang Wang
标识
DOI:10.1016/j.apcatb.2022.121185
摘要
Photocatalytic two-electron oxygen reduction reaction (2e-ORR) has been regarded as a promising strategy to solve the disadvantage of Fenton technology (constant addition of H2O2). Herein, a photocatalysis-self-Fenton system was constructed on garland g-C3N4 with carbon defects (GCN-PSFs) for pollutants degradation. Carbon defects in the obtained GCN not only accelerate charge separation but also improve 2e- ORR. As expected, the apparent rate constant for 2,4-DCP degradation by GCN-PSFs enhances to 0.070 min−1, which is 5.4, 3.3 and 2.6 times as that of BCN, BCN-PSFs and GCN. The capture experiments and electron spin resonance indicate that the high activity is attributed to abundant ∙OH radicals, which are formed from the in-situ produced H2O2. Density functional theory (DFT) calculation confirms that the carbon defects in GCN is favorable for photocatalytic 2e- ORR to H2O2. This work provides a new insight for high-efficient degradation of organic pollutants by PSFs.
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