文献类型：期刊文献

英文题名：Air-mediated phosphoric acid activation strategy for preparation of oxygenated functional groups rich activated carbon for capacitive deionization

作者：Wang, Ao[1] Li, Jiayuan[1] Xu, Wei[1] Yuan, Xiangzhou[2] Li, Bei[1] Sun, Kang[1] Liu, Junli[1]

第一作者：王傲

机构：[1] Key Lab. of Biomass Energy and Material, Jiangsu Province, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, No. 16 Suojin 5th Village, Nanjing, 210042, China; [2] Ministry of Education of Key Laboratory of Energy Thermal Conversion and Control, School of Energy and Environment, Southeast University, Nanjing, 210096, China

年份：2024

卷号：215

外文期刊名：Industrial Crops and Products

收录：EI(收录号：20241916052671);Scopus(收录号：2-s2.0-85192235636)

语种：英文

外文关键词：Chemical activation - Electrolytes - Metal ions - Phosphoric acid - Textures

摘要：Atmosphere during H3PO4 activation is vital to the texture structure and surface-interface properties of activated carbon (AC), but the researches are way out of sufficiency. In this work, it is found that the air in the H3PO4 activation process is not only conducive to the introduction of more-oxidized oxygenated functional groups on ACs, but also beneficial to the formation of micropores rather than mesopores. Besides, as the air content increases in H3PO4 activation, the ACs’ ash, phosphorous content and conductivity reduce, but their wettability, disorder degree and defect number increase. In addition, the potential of zero charge of the as-prepared ACs is positively correlated with the O-C[dbnd]O content, which show a pattern of first increasing and then decreasing with the increase of air content. Benefit from the improved hydrophilicity, electrolyte-affinity, additional adsorption sites for sodium ions, the optimal AC exhibits excellent salt adsorption capacity of 12.08 mg g?1 and good cycling stability at 1.0 V in single-pass capacitive deionization. This work not only establishes a novel and effective method for regulating the texture structure and surface properties of ACs, but also provides promising cathode candidates for capacitive deionization application. ? 2024 Elsevier B.V.