Surface modification of a hierarchical porous carbon aerogel and its effect on the adsorption of acid fuchsin

Authors :: Lifeng Cai
Ming-lian Fu
Luyi Chen
Dingcai Wu
Ruowen Fu
Source :: Carbon. 110:518
Publication Year :: 2016
Publisher :: Elsevier BV, 2016.
Abstract: 采用浓硝酸对层次孔炭气凝胶(HPCA-1)进行表面改性,制备了新型表面改性层次孔炭气凝胶(mHPCA-1),并进一步研究了mHPCA-1对酸性品红(AF)的吸附行为.结果表明,浓硝酸表面改性对炭气凝胶的纳米形貌和孔结构影响不大,但可以明显提高炭气凝胶的表面含氧官能团数量,从而优化层次孔表面化学性质,使得mHPCA-1对AF表现出更高的吸附量.mHPCA-1对AF的等温吸附过程符合Langmuir方程,其对AF的吸附属于单分子层吸附,最大吸附量可达191.57 mg·g-1,明显高于HPCA-1(120.92 mg·g-1).吸附动力学结果证实了浓硝酸表面改性可以显著提升层次孔炭气凝胶对AF的吸附量和吸附速率,且吸附动力学符合Langmuir速率方程.

Subjects :: 010302 applied physics
Materials science
Inorganic chemistry
chemistry.chemical_element
Aerogel
02 engineering and technology
General Chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Acid fuchsin
chemistry.chemical_compound
Adsorption
chemistry
0103 physical sciences
Surface modification
General Materials Science
0210 nano-technology
Carbon
Hierarchical porous

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