标题: Fabrication of large-surface-area graphitized carbons by potassium hydroxide-promoted catalytic graphitization
作者: Pan, F (Pan, Feng); Chen, T (Chen, Tao); Cai, MJ (Cai, Minjuan); Wu, F (Wu, Feng); You, ZX (You, Zhixiong); Li, JJ (Li, Jinjun)
来源出版物: MATERIALS RESEARCH BULLETIN 卷: 140 文献号: 111333 DOI: 10.1016/j.materresbull.2021.111333 出版年: AUG 2021
摘要: Porous graphitized carbons (PGCs), with the texture mimicking activated carbons while the framework resembling few-layer graphene, promise intriguing opportunities in versatile applications. Nonetheless, shortage of facile strategies to achieve high graphitization levels without compromising porosity remains a bottleneck. We demonstrate that various carbon precursors, including activated carbon, biomass, biochar, anthracite and synthetic polymer, can be converted to large-surface-area PGCs by joint treatment using both potassium hydroxide and a catalyst. In particular, using activated carbon as the precursor, BET surface areas exceeding 2000 m(2)/g can be readily achieved. Besides, joint treatment introduces mesoporosities to the products. We propose that molten potassium hydroxide can promote metal-catalyzed graphitization of carbon precursors, while preventing intensive graphene sheet stacking, forming thin graphitized flakes that construct highly porous structures. The PGCs can be used as moisture-resistant VOC adsorbents owing to their excellent hydrophobicity. The joint-treatment process can realize a scale-up fabrication of high-quality PGCs.
作者关键词: Nanostructures; Surfaces; Chemical synthesis; Surface properties
地址: [Pan, Feng; Chen, Tao; Cai, Minjuan; Wu, Feng; You, Zhixiong; Li, Jinjun] Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.
通讯作者地址: Li, JJ (通讯作者)，Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.
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