Fractal Geometry Approach to Describe Mesostructured Boehmite and Gamma-Alumina Nanorods

被引：28

作者：

Rashidi, Fereshteh ^{[1
,2
]}

Kharat, Ali Nemati ^{[1
]}

Rashidi, Ali Morad ^{[3
]}

Lima, Enrique ^{[4
]}

Lara, Victor ^{[5
]}

Valente, Jaime S. ^{[6
]}

机构：

[1] Univ Tehran, Univ Coll Sci, Sch Chem, Tehran, Iran

[2] Univ Tokyo, Grad Sch Frontier Sci, Dept Complex Sci & Engn, Chiba 2778561, Japan

[3] RIPI, Nanotechnol Res Ctr, Tehran, Iran

[4] Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico

[5] Univ Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, Mexico

[6] Inst Mexicano Petr, Mexico City 07730, DF, Mexico

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2010年 / 10期

关键词：

Boehmite; Alumina; Nanostructures; Fractals; Sol-gel processes; Mesoporous materials; Aluminum; SMALL-ANGLE SCATTERING; MESOPOROUS METAL-OXIDES; SURFACE-AREA; HYDROTHERMAL PREPARATION; GEL SYNTHESIS; POROSITY; LENGTHS; SPACE; ACID;

D O I：

10.1002/ejic.200901103

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Mesoporous boehmite and gamma-alumina with nanorod-like morphology, exhibiting a high surface area and large pore volume, have been prepared by a nonsurfactant-templating sol-gel technique with a simple precursor system, aluminum isopropoxide, ethanol, 2-propanol, or 2-butanol as solvents, and sulfuric or hydrochloric acid as peptizing agents. The effect of the solvent-type and the peptizing agent were studied, and optimum conditions were determined. A fractal geometry approach was adopted to describe the subtle alterations in the smoothness of the surface as a function of the synthesis conditions. Boehmite and gamma-alumina nanorods were characterized by nitrogen physisorption, wide- and small-angle XRD, SAXS, Al-27 MAS NMR spectroscopy, TEM, and TGA-DTA. Both boehmite and gamma-alumina nanorods have a large surface area, pore volume, and pore size.

引用

页码：1544 / 1551

页数：8

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