Surface fractal dimension of composites TiO2-hydrotalcite

被引：11

作者：

Contreras-Ruiz, J. C. ^{[1
]}

Martinez-Gallegos, M. S. ^{[1
]}

Ordonez-Regil, E. ^{[2
]}

机构：

[1] Inst Tecnol Toluca, AV Inst Tecnol S-N,Colonia Agr Bellavista, Metepec 52149, Edo De Mexico, Mexico

[2] Inst Nacl Invest Nucl, Dept Quim, AP 18-1022,Col Escandon, Mexico City 11801, DF, Mexico

来源：

MATERIALS CHARACTERIZATION | 2016年 / 121卷

关键词：

Composites; TiO2; Hydrotalcite; Surface fractal dimension; Roughness; PHOTOCATALYTIC DEGRADATION; ADSORPTION; RECOMMENDATIONS;

D O I：

10.1016/j.matchar.2016.09.032

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Composites TiO2-Hydrotalcite were prepared from synthesized TiO2 using titanium i) isopropoxide, ii) titanium butoxide and hydrotalcites Mg/Al-CO32- obtained by the sol-gel method. Adsorption-desorption isotherms from N-2 were obtained to determine BET surface area, volume and average diameter for pore. Surface fractal dimension determination has been a powerful tool to describe the roughness and irregular shape in several objects at different scales. The most common method to obtain surface fractal dimension data is calculated based on the surface area measurement by gas N-2 adsorption. This work computes fractal dimension of composites using adsorption-desorption isotherms from N-2, applying both Frenkel-Halsey-Hill and Mahnke-Mogel methodologies for this purpose. Surface fractal dimension values show minimal differences in both methodologies, and the analyzed materials were in the intermediate roughness range (2.11 <= D <= 2.47), which is due to the mesoporous original materials; hydrotalcite and TiO2. Pore size distribution and hysteresis loop affects the surface fractal dimension, but it did not have a significant influence on catalyst process. (C) 2016 Elsevier Inc. All rights reserved.

引用

页码：17 / 22

页数：6

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