氯化锌活化大麻布活性炭纤维的孔结构

北京化工大学学报(自然科学版) ›› 2010, Vol. 37 ›› Issue (5) : 44-50.

PDF(986 KB)
欢迎访问北京化工大学学报(自然科学版),今天是 2025年2月19日 星期三
Email Alert  RSS
PDF(986 KB)
北京化工大学学报(自然科学版) ›› 2010, Vol. 37 ›› Issue (5) : 44-50.
材料科学与工程

氯化锌活化大麻布活性炭纤维的孔结构

作者信息 +

Pore structure of hemp cloth-derived carbon fibers activated by zinc chloride

Author information +
文章历史 +

摘要

以大麻布为原料,氯化锌为活化剂,在不同活化温度下制备大麻布活性炭纤维样品。采用低温氮气吸附和密度函数理论(DFT)等对样品的孔结构和表面能量分布等表面织构特征进行了研究。结果表明,样品BET比表面积随活化温度的升高呈现先增大后减小的变化趋势,800 ℃时达到最大值915 m2/g;样品是典型的微孔材料,孔分布集中于2 nm以下的微孔范围内,只有极少部分的中孔,基本没有大孔;样品的表面能量分布较宽,为不均匀性表面;随活化温度的升高,样品碘吸附量呈先增大后减小的变化趋势,与微孔孔容、总孔容以及由BET比表面积的变化趋势一致。

Abstract

Hemp cloth-derived carbon fibers have been prepared by a ZnCl2 activation method. The pore structure of the resulting samples was characterized by N2 adsorption and the surface energy distribution was analyzed by the DFT method. The BET specific surface area of the hemp cloth-derived activated carbon fibers first increased and then decreased with increasing temperature, and reached a maximum of 915 m2/g at 800 ℃.The samples were all typical microporous materials. The pore size distribution was mainly within the 2 nm micropore region. All the samples possessed a small fraction of mesopores, but no macropores. The samples had wide surface energy distributions and heterogeneous surfaces. As the activation temperature was increased, the iodine adsorption amount of the materials showed an initial increase followed by a decrease, which follows the same trend as for micropore volume, total pore volume and BET specific surface area.

引用本文

导出引用
氯化锌活化大麻布活性炭纤维的孔结构[J]. 北京化工大学学报(自然科学版), 2010, 37(5): 44-50
Pore structure of hemp cloth-derived carbon fibers activated by zinc chloride[J]. Journal of Beijing University of Chemical Technology, 2010, 37(5): 44-50

参考文献

[1]Jung M J, Kim J W, Im J S, et al. Nitrogen and hydrogen adsorption of activated carbon fibers modifled by fluorination[J]. Journal of Industrial and Engineering Chemistry, 2009, 15: 410-414.
[2]Zhang S J, Feng H M, Wang J P, et al. Structure evolution and optimization in the fabrication of PVA-based activated carbon flbers[J]. Journal of Colloid and Interface Science, 2008, 321: 96-102.
[3]Huidobro A, Pastor A C, Rodríguez-Reinoso F. Preparation of activated carbon cloth from viscous rayon. Part Ⅳ: Chemical activation[J]. Carbon, 2001, 39: 389-398.
[4]Suárez-García F, Martínez-Alonso A, Tascón J M D. Activated carbon fibers from Nomex by chemical activation with phosphoric acid[J]. Carbon, 2004, 42: 1419-1426. 
[5]Williams P T, Reed A R. Pre-formed activated carbon matting derived from the pyrolysis of biomass natural fibre textile waste[J]. J Anal Appl Pyrolysis, 2003, 70: 563-577.
[6]陈凤婷, 曾汉民. 几种植物基活性炭材料的孔结构与吸附性能比较:(Ⅰ)孔结构表征[J]. 离子交换与吸附, 2004, 20(2): 104-112.
Chen F T, Zeng H M. Comparison on pore structure and adsorption properties of several types of plant-based carbonaceous adsorbents:(Ⅰ) Characterization of pore structure[J]. Ion Exchange and Adsorption, 2004, 20(2): 104-112. (in Chinese)
[7]Senthilkumaar S, Varadarajan P R, Porkodi K, et al. Adsorption of methylene blue onto jute fiber carbon: Kinetics and equilibrium studies[J]. Journal of Colloid and Interface Science, 2005, 284: 78-82.
[8]杨儒, 罗玲玲, 张建春, 等. 磷酸活化汉麻布活性碳纤维的孔结构[J]. 北京化工大学学报: 自然科学版, 2010, 37(3): 51-57.
Yang R, Luo L L, Zhang J C, et al. Property of pore structure of the hemp cloth activated carbon fibers activated by phosporic acid[J]. Journal of Beijing University of Chemical Technology: Natural Science, 2010, 37(3): 51-57. (in Chinese)
[9]Wang L H, Fujita M, Inagaki M. Relationship between pore surface areas and electric double layer capacitance in non-aqueous electrolytes for air-oxidized carbon spheres[J]. Electrochimica Acta, 2006, 51: 4096-4102.
[10]Gomez-Serrano V, Cuerda-Correa E M, Fernandez-Gonzalez M C, et al. Preparation of activated carbons from chestnut wood by phosphoric acid-chemical activation. Study of microporosity and fractal dimension[J]. Materials Letters, 2005, 59: 846-853. 
[11]Kumagai S, Ishizawa H, Toida Y. Influence of solvent type on dibenzothiophene adsorption onto activated carbon fiber and granular coconut-shell activated carbon[J]. Fuel, 2010, 89: 365-371.
[12]Wu Z B, Liu Z G, Tian P, et al. Template-assisted syntheses of two novel porous zirconium methylphosphonates[J]. Micropous and Mesopous Materials, 2005, 81: 175-183.
[13]Yang Q H, Liu C, Liu M, et al. Pore structure of SWNTs with high hydrogen storage capacity [J]. Science in China: Ser E, 2002, 45(6): 561-568. 
[14]Lu A H, Zheng J T. Study of microstructure of high-surface-area polyacrylonitrile activated carbon fibers[J]. Journal of Colloid and Interface Science, 2001, 236: 369-374.
[15]秦军, 陈明鸣, 王成扬, 等. 炭化温度对酚醛基活性炭纤维孔结构的影响[J]. 炭素, 2007(3): 3-6.
Qin J, Chen M M, Wang C Y, et al. Influences of carbonization temperature on pore structure of phonemic resin based activated carbon fibers[J]. Carbon, 2007(3): 3-6. (in Chinese) 
[16]Yang R, Liu G Q, Li M. Analysis of the effect of drying conditions on the structural and surface heterogeneity of silica aerogels and xerogel by using cryogenic nitrogen[J]. Micropous and Mesopous Materials, 2010, 129: 1-10.
[17]Nagaraja B M, Abimanyu H, Jung K D, et al. Preparation of mesostructured barium sulfate with high surface area by dispersion method and its characterization[J]. Journal of Colloid and Interface Science, 2007, 316: 645-651.
PDF(986 KB)

2985

Accesses

0

Citation

Detail

段落导航
相关文章

/