Effect of calcination temperature on the structure and hydroxylation activity of Ni0.5Cu0.5Fe2O4 nanoparticles

被引：16

作者：

Tan, Xiaoyan ^{[1
,2
]}

Zhao, Ying ^{[2
]}

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

来源：

APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 14期

基金：

中国国家自然科学基金;

关键词：

Nanocrystalline Ni0.5Cu0.5Fe2O4; Surface characteristics; Sol-gel method; XPS; Hydroxylation; MAGNETIC-PROPERTIES; CATALYTIC-ACTIVITY; MOSSBAUER-SPECTRA; ZN; OXIDATION; NI; FERRITES; SPINELS; PHENOL; IRON;

D O I：

10.1016/j.apsusc.2011.02.056

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 Ni0.5Cu0.5Fe2O4 was synthesized by sol-gel method with varying calcination temperature over the range of 500-1000. The powders obtained were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). In addition, thermal analysis (TG-DTG-DTA) of the precursor was carried out. The study reveals the simultaneous decomposition and ferritization process at rather low temperature (280-350). For the crystalline structure investigated, single cubic spinel is gained when the precursor was decomposed at 800-1000, whereas separated crystal CuO formed when calcination temperature is below 800. The increase of calcination temperature favors the appearance of Fe-B(3+), Cu-A(2+) and O on the spinel surface. The hydroxylation activity is relative to the amount of Cu-B(2+) species on the spinel surface. The lattice oxygen species on the spinel surface are favorable for the deep oxidation of phenol. (C) 2011 Elsevier B. V. All rights reserved.

引用

页码：6256 / 6263

页数：8