Systematic control of particle size in rapid open-vessel microwave synthesis of K-OMS-2 nanofibers

被引：61

作者：

Nyutu, Edward K. ^{[1
]}

Chen, Chun-Hu ^{[1
]}

Sithambaram, Shanthakumar ^{[1
]}

Crisostomo, Vincent Mark B. ^{[1
]}

Suib, Steven L. ^{[1
,2
]}

机构：

[1] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA

[2] Univ Connecticut, Dept Chem Mat & Biomol Engn, Storrs, CT 06269 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 17期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1021/jp800672m

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Multigram quantities of manganese oxide (K-OMS-2) nanomaterials in the size range of 4-20 nm and with very high surface areas up to 227 m(2)/g were produced rapidly via microwave-reflux route with use of mixed aqueous and nonaqueous solvents. The formation process, particle size, crystallite size, crystal structure, and properties of these nanomaterials were characterized by X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), infrared spectroscopy (FT-IR), Raman spectroscopy, and nitrogen adsorption-desorption. The OMS-2 nanofiber diameter was systematically controlled by varying the concentration or type of the cosolvent. Catalytic studies of these K-OMS-2 nanomaterials for oxidation of anisyl alcohol were performed. These nanomaterials show excellent catalytic activity when compared with conventionally prepared bulk OMS-2 catalysts.

引用

页码：6786 / 6793

页数：8

共 56 条

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