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

通信作者：Li, B[1];Liu, JL[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Key Lab Biomass Energy & Mat, 16 Suojin 5th Village, Nanjing 210042, Jiangsu, Peoples R China;[2]Southeast Univ, Minist Educ, Sch Energy & Environm, Key Lab Energy Thermal Convers & Control, Nanjing 210096, Peoples R 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);WOS:【SCI-EXPANDED(收录号:WOS:001239917900001)】；

基金：The authors thank the financially support from the Foundation of Jiangsu Key Lab of Biomass Energy and Material (JSBEM-S-202101) , the Forestry Technology Projects of Zhejiang Province (2023SY04) . The authors also would like to thank Shiyanjia Lab ( www.shiyanjia.com ) for the TEM, SEM and XPS measurements.

语种：英文

外文关键词：Activated carbon; Phosphoric acid activation; Air mediated; Oxygenated functional groups; Capacitive deionization

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--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.