Fractal Dimensions of Macroporous and Hypercrosslinked Polymeric Adsorbents from Nitrogen Adsorption Data

被引：17

作者：

Li, Ying ^{[1
]}

Long, Chao ^{[1
,2
]}

Tao, Weihua ^{[1
]}

Li, Aimin ^{[1
,2
]}

Zhang, Quanxing ^{[1
,2
]}

机构：

[1] Nanjing Univ, State Key Lab Pollut Control & Resource Reuse, Sch Environm, Nanjing 210093, Peoples R China

[2] State Environm Protect Engn Ctr Organ Chem Ind Wa, Nanjing 210046, Peoples R China

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2010年 / 55卷 / 09期

基金：

中国国家自然科学基金;

关键词：

NONINTEGER DIMENSIONS; PORE STRUCTURE; CHEMISTRY; SURFACES; SORPTION; WATER; DYES;

D O I：

10.1021/je100010d

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The nitrogen adsorption data of macroporous and hypercrosslinked adsorbents at 77 K were measured in the relative pressure range of 10(-6) to 0.99. The Brunauer-Emmett-Teller (BET) surface area, micropore volume, pore size distribution, and fractal dimension of two adsorbents were evaluated from analysis of N-2 gas adsorption isotherms. The estimated surface fractal dimensions D of macroporous and hypercrosslinked adsorbents using the modified fractal Frenkel-Halsey-Hill (FHH) model were 2.471 and 2.709, respectively. Compared with the results of N-2 adsorption isotherm analysis, it should be noted that the surface fractal dimension D was related to the pore size distribution of the adsorbents. The more well-developed the microporous structure of a polymeric adsorbent, the larger the fractal dimension D. Moreover, the adsorbents were also analyzed by transmission electron microscopy (TEM), confirming the surface irregularities and more sophisticated microporous structure of the hypercrosslinked adsorbent as compared to the macroporous adsorbent.

引用

页码：3147 / 3150

页数：4

共 21 条

[1]

[Anonymous], FRACTAL APPROACH HET

[2] CHEMISTRY IN NONINTEGER DIMENSIONS BETWEEN 2 AND 3 .2. FRACTAL SURFACES OF ADSORBENTS [J].