化学工程
吸附
激进的
石墨氮化碳
无机化学
析氧
碳纤维
氧气
作者
Huazhe Wang,Wanqian Guo,Qishi Si,Banghai Liu,Qi Zhao,Haichao Luo,Nanqi Ren
标识
DOI:10.1016/j.cej.2021.129504
摘要
Abstract A noncovalent functionalization approach was implemented using graphitic biochar (BC) as dopant to manipulate electronic properties of polymeric carbon nitride (PCN) while preserving its robust geometric skeleton. By fine-tuning the mass proportions of precursors during copolymerization, the carbonization of corncob was successfully confined in the PCN interlayers. An electron transport highway from PCN to BC was built owing to the π-electron delocalization. As a result, the non-covalent assembled PCN/BC composite rivaled popular nitrogen-doped carbon materials in activating peroxymonosulfate (PMS), and meanwhile exhibited superior durability. Singlet oxygen (1O2) was identified as the primary reactive oxygen species. Combining theoretical calculations and in-situ detections, a novel 1O2 evolution route with respect to the dissociation of PMS at the S/O site and the formation of superoxide radical was decoded. This work offers a new idea for the synthesis of durable PMS activators and enriches mechanistic understanding of PMS decomposition over metal-free catalysts.
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