层次孔炭气凝胶的表面改性及吸附特性

蔡力锋; 傅明连; 陈鹭义; 符若文; 吴丁财

层次孔炭气凝胶的表面改性及吸附特性

1.
莆田学院环境与生物工程学院, 福建省新型污染物生态毒理效应与控制重点实验室, 福建莆田 351100;
2.
中山大学化学与化学工程学院, 材料科学研究所, 聚合物复合材料及功能材料教育部重点实验室, 广东广州 510275

基金项目: 国家自然科学基金(51422307,51372280,51173213);广东省自然科学杰出青年基金(S2013050014408);国家"万人计划"青年拔尖人才(2015T80932);教育部"新世纪优秀人才支持计划"(NCET-12-0572);广州市珠江科技新星计划项目(2013J2200015);广东特支计划科技创新青年拔尖人才(2014TQ01C337);国家重点基础研究发展计划项目(2014CB932402);聚合物复合材料及功能材料教育部重点实验室开放课题(PCFM-2015-01);福建省教育厅科技项目(JK2014043).

详细信息

作者简介:
蔡力锋,博士,副教授.E-mail:cailifeng2013@163.com

通讯作者:
吴丁财,教授.E-mail:wudc@mail.sysu.edu.cn;蔡力锋,副教授.E-mail:cailifeng2013@163.com.

中图分类号: TQ427.2⁺6
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出版历程
- 收稿日期: 2016-05-06
- 录用日期: 2016-06-28
- 修回日期: 2016-06-08
- 刊出日期: 2016-06-28

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

1.
College of Environmental and Biological Engineering, Fujian Provincial Key Laboratory of Ecology-Toxicological Effects & Control for Emerging Contaminants, Putian University, Putian 351100, China;
2.
Materials Science Institute, PCFM Laboratory, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China

Funds: National Natural Science Foundation of China (51422307, 51372280, 51173213);Guangdong Natural Science Funds for Distinguished Young Scholar (S2013050014408);National Program for Support of Top-notch Young Professionals (2015T80932);Program for New Century Excellent Talents in University (NCET-12-0572);Program for Pearl River New Star of Science and Technology in Guangzhou (2013J2200015);Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program (2014TQ01C337);National Key Basic Research Program of China (2014CB932402);Open project of Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education (PCFM-2015-01);Science and Technology Project of the Education Department of Fujian Province (JK2014043).

摘要

摘要: 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。
- 炭气凝胶 /
- 层次孔结构 /
- 表面改性 /
- 酸性品红 /
- 吸附
Abstract: The surface of a hierarchical porous carbon aerogel (HPCA-1) was modified with nitric acid to obtain mHPCA-1. Acid fuchsin (AF) adsorption on these carbon aerogels in water was studied. Results indicate that the acid modification has trivial effects on the morphology and pore structure, but obviously increases the number of surface oxygen-containing groups. The isothermal adsorption of AF on these modified carbon aerogels is monomolecular layer adsorption, and can be well described by the Langmuir equation. The maximum adsorption capacity on mHPCA-1 reaches 191.57 mg·g^-1, which is much higher than that on HPCA-1 (120.92 mg·g^-1). The adsorption kinetics can be well described by a first-order kinetic equation and the kinetic constant can be increased by the acid modification.
- Carbon aerogels /
- Hierarchical porous structure /
- Surface modification /
- Acid fuchsin /
- Adsorption

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