Engineering Co-N4 active sites in heptazine-porphyrin organic polymer to boost non-radical singlet oxygen generation in peroxymonosulfate activation
Engineering Co-N4 active sites in heptazine-porphyrin organic polymer to boost non-radical singlet oxygen generation in peroxymonosulfate activation
研究概述
在七嗪–卟啉共轭聚合物中锚定Co—N4位点，促进电子转移并激活PMS生成单线态氧，实现非自由基降解磺胺甲噁唑。速率常数1.7018 min⁻¹，约为无Co聚合物体系93倍；多种水质及pH下有效，处理后植物毒性降低，并验证连续废水处理。
谱图与表征信息
Fig. 2. (a) XRD patterns of catalysts, (b) Co 2p XPS spectra of the HPOP-Co20, (c) Normalized XANES spectra at the Co K-edge for HPOP-Co20, Co foil, CoPc, CoO, and Co3O4. (d) The FT of k2-weighted EXAFS signals and (e) the corresponding EXAFS R space fitting curve of the HPOP-Co20. WT for the K2-weighted EXAFS signals of (f) HPOP-Co20. Optimized structural models along with calculated spatial distributions of charge density for the LUMO and HOMO, ESP surface distribution of (g) HPOP and (h) HPOP-Co20 (red is positive charge, blue is negative charge).