硼-氮共掺杂中空碳纳米纤维的制备及其活化过一硫酸盐降解双酚A的性能研究

碳材料由于良好的稳定性、无二次污染、高的比表面积等特性,近年来作为催化剂广泛应用于水处理领域.本文以金属有机骨架（MOFs）材料作为前驱体,通过"静电纺丝+热解"的方法制备了硼-氮共掺杂的中空碳纳米纤维（B-HCNFs）,并利用X射线光电子能谱仪（XPS）、拉曼光谱仪（Raman）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、氮气吸附仪等对制备材料的组成和结构进行了详细的分析.将合成的B-HCNFs用于催化剂活化过一硫酸盐（peroxymonosulfate,PMS）降解双酚A（BPA）,结果表明制备的催化剂具有优异的性能.考察了B掺杂前后以及催化剂投加量、初始pH、温度等因素对BPA去除效率的影响,发现B掺杂可以有效提升催化剂的性能.此外,自由基淬灭实验和电子顺磁共振波谱仪（EPR）研究表明,非自由基（电子转移中间体）在BPA的降解过程中占主导作用,而自由基（SO₄^·-,^·OH）贡献较小.动态循环实验显示该催化剂具有良好的稳定性和应用前景.

The fabrication of B-N co-doping hollow carbon nanofibers and peroxymonosulfate activation for the degradation of bisphenol A

Carbon materials have been extensively used in water treatment as catalysts in recent years due to their excellent characteristics such as good stability, minimal secondary pollution, and high specific surface area. Using metal organic-frameworks (MOFs) as precursor, boron and nitrogen co-doping hollow carbon nanofibers (B-HCNFs) were prepared by combining method of "electrospinning and pyrolysis". Chemical composition and structure of prepared materials were analyzed in detail by X-ray photoelectron spectrometer (XPS), Raman spectroscopy (Raman), scanning electron microscope (SEM), transmission electron microscope (TEM) and nitrogen adsorption. The synthesized B-HCNFs catalysts demonstrate outstanding properties to activate (PMS) for the degradation bisphenol A (BPA). Additionally, by investigating factors such as catalyst dosage, initial pH, and temperature as well as before and after B doping on the removal efficiency of BPA, it is worth noted that B doping could effectively improve the performance of the catalysts. Moreover, radical quenching experiments and electron paramagnetic resonance spectrometer (EPR) demonstrate that the degradation of BPA is largely determined by non-radicals (electron transfer intermediates) whereas free radicals (SO₄^·-, ^·OH) effect is negligible. Finally, dynamic cycle experiments show that the catalysts have good stability and practical application in the perspective.