Effect of preparation method on the physical and catalytic property of nanocrystalline Fe2O3

被引：82

作者：

Wu, Gang ^{[1
,2
]}

Tan, Xiaoyan ^{[1
,3
]}

Li, Guiying ^{[1
]}

Hu, Changwei ^{[1
]}

机构：

[1] Sichuan Univ, Coll Chem, Minist Educ, Key Lab Green Chem & Technol, Chengdu 610064, Sichuan, Peoples R China

[2] SW Jiaotong Univ Emei, Dept Basic Courses, Emei 614202, Sichuan, Peoples R China

[3] Cent S Univ Forestry & Technol, Inst Appl Chem, Changsha 412006, Hunan, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 504卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Nanostructured materials; Catalysis; Crystal structure; X-ray diffraction; XPS; IRON-OXIDE; FINE PARTICLES; BENZENE; PHENOL; FE3O4; HYDROXYLATION; FILMS; DEHYDROGENATION; SPECTRA; GROWTH;

D O I：

10.1016/j.jallcom.2010.05.119

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：

Nanocrystalline Fe2O3 was prepared by five different methods. The samples were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). It is found that pure single-phase of alpha-Fe2O3 crystal could be gained via thermal decomposition and ultrasonic-precipitation method, while both alpha-Fe2O3 and gamma-Fe2O3 are obtained by the other methods. The morphologies and particle sizes of the samples obtained are approximate except that by thermal decomposition. Compared to alpha-Fe2O3, gamma-Fe2O3 possesses more surface oxygen species "O-". The activity test indicates that surface oxygen species "O-" plays a crucial role in the hydroxylation of benzene to phenol with hydrogen peroxide as oxidant. (C) 2010 Published by Elsevier B.V.

引用

页码：371 / 376

页数：6

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