Investigation on the Surface Properties of the Carbon Nanotubes before and after the Adsorption of Polyacrylic Acid

Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (15): 1447-1450. Previous Articles Next Articles

吸附聚丙烯酸对纳米碳管表面特征影响的研究

崔举庆¹, 侯庆锋¹, 陆现彩², 何其慧¹, 刘显东², 沈健^1,3, 胡柏星¹

1. 南京大学表面和界面化学工程技术研究中心, 南京, 210093;
2. 南京大学地球科学系, 内生矿床成矿机制研究国家重点实验室, 南京, 210093;
3. 南京师范大学化学与环境科学学院, 南京, 210097

投稿日期:2003-11-03 修回日期:2004-02-27 发布日期:2014-02-17
通讯作者: 胡柏星,E-mail:juqing78@yahoo.com.cn E-mail:juqing78@yahoo.com.cn
基金资助:
南京大学分析测试基金(No.DK3-7)资助项目.

Investigation on the Surface Properties of the Carbon Nanotubes before and after the Adsorption of Polyacrylic Acid

CUI Ju-Qing¹, HOU Qing-Feng¹, LU Xian-Cai², HE Qi-Hui¹, LIU Xian-Dong², SHEN Jian^1,3, HU Bai-Xing¹

1. Research Center of Surface and Interface Chemical Engineering Technology, Nanjing University, Nanjing 210093;
2. State Key Laboratory for Mineral Deposit Research, Department of Earth Sciences, Nanjing University, Nanjing 210093;
3. College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 210097

Received:2003-11-03 Revised:2004-02-27 Published:2014-02-17

Abstract

In this work, the variations in surface properties of the carbon nanotubes due to the adsorption of polyacrylic acid (PAA) was investigated based on the nitrogen adsorption isotherms.It is indicated that the adsorption of PAA greatly influences the original surface properties of the carbon nanotubes.A remarkable decrease in BET specific surface area (S_BET) was found while the adsorption amount of PAA increased.And the patterns of pore size distribution (PSD) of the treated carbon nanotubes are similar to those of the original ones, especially in the range of 1.8～4.4 nm, however, the pore volume decreases as the adsorption of PAA increases and a new type of pore with the width less than 1.8 nm appears.The surface fractal dimension (d_SF) calculated from the nitrogen adsorption isotherms employing the thermodynamic methods shows that the adsorbed PAA can lower the surface roughness of carbon nanotubes.All the observed variation in S_BET, PSD and d_SF could be attributed to the pore blocking effect and surface screening effect of the adsorbed PAA.This study will facilitate the understanding and application in the field of adsorbent and catalyst.

Key words: carbon nanotube, PAA, adsorption, specific surface area, pore size distribution, surface fractal dimension

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CUI Ju-Qing, HOU Qing-Feng, LU Xian-Cai, HE Qi-Hui, LIU Xian-Dong, SHEN Jian, HU Bai-Xing. Investigation on the Surface Properties of the Carbon Nanotubes before and after the Adsorption of Polyacrylic Acid[J]. Acta Chimica Sinica, 2004, 62(15): 1447-1450.

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吸附聚丙烯酸对纳米碳管表面特征影响的研究

Investigation on the Surface Properties of the Carbon Nanotubes before and after the Adsorption of Polyacrylic Acid

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