Fajardo-Puerto Edgar, López-García Nerea, Elmouwahidi Abdelhakim, Bailón-García Esther, Carrasco-Marín Francisco, Ramírez-Valencia Lilian D, Pérez-Cadenas Agustín F
Materiales Polifuncionales Basados en Carbono, Departamento de Química Inorgánica-Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente-Universidad de Granada (UEQ-UGR), 18071 Granada, Spain.
Gels. 2024 May 1;10(5):306. doi: 10.3390/gels10050306.
Carbon xerogel spheres co-doped with nitrogen and eco-graphene were synthesized using a typical solvothermal method. The results indicate that the incorporation of eco-graphene enhances the electrochemical properties, such as the current density (J) and the selectivity for the four transferred electrons (n). Additionally, nitrogen doping has a significant effect on the degradation efficiency, varying with the size of the carbon xerogel spheres, which could be attributed to the type of nitrogenous group doped in the carbon material. The degradation efficiency improved in the nanometric spheres (48.3% to 61.6%) but decreased in the micrometric-scale spheres (58.6% to 53.4%). This effect was attributed to the N-functional groups present in each sample, with N-CNS-5 exhibiting a higher percentage of graphitic nitrogen (35.7%) compared to N-CMS-5 (15.3%). These findings highlight the critical role of sphere size in determining the type of N-functional groups present in the sample. leading to enhanced degradation of pollutants as a result of the electro-Fenton process.
采用典型的溶剂热法合成了氮和生态石墨烯共掺杂的碳气凝胶球。结果表明，生态石墨烯的掺入增强了电化学性能，如电流密度（J）和对四个转移电子（n）的选择性。此外，氮掺杂对降解效率有显著影响，其随碳气凝胶球的尺寸而变化，这可能归因于碳材料中掺杂的含氮基团类型。纳米级球体的降解效率有所提高（从48.3%提高到61.6%），而微米级球体的降解效率则有所下降（从58.6%下降到53.4%）。这种效应归因于每个样品中存在的N-官能团，与N-CMS-5（15.3%）相比，N-CNS-5表现出更高比例的石墨氮（35.7%）。这些发现突出了球体尺寸在确定样品中存在的N-官能团类型方面的关键作用，导致由于电芬顿过程而增强了污染物的降解。
