Synthesis of Porous Network-Like α-Fe2O3 and α/γ-Fe2O3 Nanoparticles and Investigation of Their Photocatalytic Properties

被引：3
作者：
Ghasemifard, M. [1 ]
Heidari, G. [1 ]
Ghamari, M. [1 ]
Fathi, E. [2 ]
Izi, M. [1 ]
机构：
[1] Esfarayen Univ Technol, Esfarayen, North Khorasan, Iran
[2] Ferdowsi Univ Mashhad, Mashhad, Khorasan, Iran
来源：
NANOTECHNOLOGIES IN RUSSIA | 2019年 / 14卷 / 7-8期
关键词：
AZO DYES; DEGRADATION; NANOCOMPOSITE; TITANIUM; TIO2; COMPOSITE; HEMATITE;
D O I：
10.1134/S1995078019040062
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, porous network-like alpha-Fe2O3 and alpha/gamma-Fe2O3 nanoparticles (NPs) were synthesized by auto-combustion method and their photocatalytic performance was evaluated using methylene blue (MB) as a dye model. Calcination of the synthesized nanoparticles resulted in alpha/gamma-Fe2O3 heterophase magnetite material at 450 degrees C and pure alpha-Fe2O3 at 700 and 800 degrees C. The magnetic property of alpha/gamma-Fe2O3 makes the photocatalyst to be easily collected from the photocatalytic system and increases its potential in industrial applications. The alpha/gamma-Fe2O3 heterophase material showed a photocatalytic performance almost similar to that of the alpha-Fe2O3 NPs calcined at 800 degrees C, but higher than that of the alpha-Fe2O3 NPs calcined at 700 degrees C. The cliff-like band structure between alpha-Fe2O3 and gamma-Fe2O3 reduced recombination of photoelectrons and photoholes, thereby improving photocatalytic performance of the alpha/gamma-Fe2O3 heterophase material.
引用
收藏
页码：353 / 361
页数：9
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