多掺杂生物炭活化过一硫酸盐降解酸性橙 G

文章以酵母细胞为模板，通过一锅法成功制备多杂原子（氮、磷、硫）掺杂的多孔碳微球（multi-heteroatoms（nitrogen，phosphorus，and sulfur）doped porous carbon microspheres，MHPCS），并将其用于活化过一硫酸盐（peroxymonosulfate，PMS）降解酸性橙G（orange G，OG）。实验结果表明， $ MHPCS_{800} $（在800℃下热解）+PMS体系在30min内对OG的去除率可以达到100%。猝灭实验、电子自旋共振（electron spin resonance，ESR）实验、傅里叶变换红外光谱（Fourier transform infrared spectroscopy，FTIR）和电化学表征结果表明： $ MHPCS_{800} $ +PMS体系中的主要活性物质是表面络合物；实际废水中常见的阴离子 $ SO_{4}^{2-} $（浓度为78mmol/L）对 $ MHPCS_{800} $ +PMS体系去除OG几乎没有影响，而相同浓度的 $ Cl^{-} $和 $ HCO_{3}^{-} $却有促进作用，5min内OG被完全去除。该材料可通过简单的热处理（350℃、2h）循环使用，具有一定的应用潜力。研究结果可为设计合成多杂原子掺杂碳催化剂及其污水处理应用提供理论指导和技术支持。

In this paper, multi-heteroatoms (nitrogen, phosphorus, and sulfur) doped porous carbon microspheres (MHPCS) were successfully prepared via one-pot strategy using yeast cells as a template, and they were used to activate peroxymonosulfate (PMS) to degrade orange G(OG). The experimental results show that the $ MHPCS_{800} $ (pyrolysis at $ 800\;^{\circ}C $) + PMS system can achieve 100% OG removal within 30 min. The results of quenching experiments, electron spin resonance (ESR), electrochemical characterization and Fourier transform infrared spectroscopy (FTIR) showed that the main active species in the $ MHPCS_{800} + PMS $ system were surface reactive complexes. The common $ SO_{4}^{2-} $ (78 mmol/L) in wastewater had little effect on the catalytic activity of $ MHPCS_{800} + PMS $ system, while the same concentration of $ Cl^{-} $and $ HCO_{3}^{-} $promoted the degradation of OG, which was completely degraded within 5 min. The material can be recycled through a simple thermal recovery ( $ 350\;^{\circ}C $, 2 h), which has a certain potential for environmental applications. This study is expected to provide theoretical guidance and technical support for the design and synthesis of multi-heteroatoms doped carbon catalysts and their application in wastewater treatment.