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基于生物质废弃物的氮、硫掺杂多孔炭材料制备及性能
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摘要
杂原子掺杂(如氮、硫等)的多孔炭材料由于其优异的性能越来越受到研究者的关注。随着绿色化学和可持续发展理念的深入,如何用廉价的原料通过简单方法合成新型功能化多孔炭材料已成为研究的热点[1]。前期工作中,我们以生物质衍生物制备了多种氮掺杂多孔炭材料[2]。近期,我们以更廉价的生物质废弃物为原料,结合水热炭化、熔融盐、物理和化学活化等方法,通过简单的途径制备了一系列氮、硫掺杂的多孔炭材料。研究表明,这些多孔炭材料具有较高的比表面积(1000–2700 m~2g~(–1)),氮、硫含量分别高达8.0和7.0 wt%。材料的孔结构可以通过不同原料和制备方法的选取进行调变:如头发通过降解和活化可以得到具有高孔隙率的微孔–超微孔氮、硫掺杂炭材料;虾皮通过熔融盐、水热炭化与CO_2活化结合的方法得到具有微孔–介孔–大孔结构的等级孔氮掺杂炭材料,等等。进一步研究表明,这些氮、硫掺杂的多孔炭材料在二氧化碳吸附、超级电容器、锂硫电池等能源与环境等领域的应用中表现出优异性能。
Our recent research regarding green and sustainable alternatives for the production of nitrogen and sulfur-doped carbons from biowastes(e.g. hair, shrimp shell, etc.) will be presented. It was found out that the obtained carbon materials possess relatively large Brunauer-Emmett-Teller specific surface area values(1000–2700 m~2 g~(–1)) as well as nitrogen and sulfur contents(8.0 and 7.0, respectively). The porous structures of the materials could be adjusted by using different biowastes and methods, such as, micro–ultramicroporous carbons were synthesized by degradation and activation of human hair, hierarchical porous carbons were obtained from shrimp shells via hydrothermal carbonization, CO_2 or molten salts activation methods. Further, the resulting N-and S-containing carbon materials present promising performances in some important energy and environment applications, such as CO_2 sequestration, supercapacitors and Lithium-Sulfur batteries.
引文
[1]B.Hu,K.Wang,L.H.Wu,S.H.Yu,M.Antonietti,M.-M.Titirici,Adv.Mater.,2010,22:813.
    [2]1)L.Zhao,L.-Z.Fan,M.-Q.Zhou,H.Guan,S.Qiao,M.Antonietti,M.-M.Titirici,Adv.Mater.,2010,22(45):5202;2)L.Zhao,N.Baccile,S.Gross,W.Wei,Y.Sun,M.Antonietti,M.-M.Titirici,Carbon,2010,48(13):3778;3)M.Sevilla,L.Yu,L.Zhao,C.O.Ania,M.-M.Titirici,ACS Sustain.Chem.Eng.,2014,2(4):1049.

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