Effects of Phosphate Modification on the Thermal Stability and Photocatalytic Activity of Nanosized Fe2O3

被引：3

作者：

Meng Qingqiang ^{[1
]}

Sun Wanting ^{[1
]}

Luan Yunbo ^{[1
]}

Jing Liqiang ^{[1
]}

机构：

[1] Heilongjiang Univ, Sch Chem & Mat Sci, Key Lab Funct Inorgan Mat Chem, Minist Educ, Harbin 150080, Peoples R China

来源：

CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2014年 / 35卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Fe2O3; Thermal stability; Photogenerated charge separation; Photocatalysis; Colorless pollutant degradation; SURFACE PHOTOVOLTAGE SPECTRA; NANOPARTICLE PHOTOCATALYSTS; DOPED ALPHA-FE2O3; TIO2; SEMICONDUCTOR; MECHANISM; ELECTRODES; HEMATITE; FILMS;

D O I：

10.7503/cjcu20131257

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

alpha-Fe2O3 nanoparticles were modified with phosphate acid by the dipping-steam solution process. The influence of phosphate modification on the thermal stability of nanosized Fe2O3 was investigated. The results showed that the thermal stability of Fe2O3 was remarkably enhanced by phosphate modification, owing to the inhibition of aggregation between nanoparticles by the modified phosphate groups. The sample treated at 600 degrees C showed the highest photocatalytic activity for degrading gas-phase acetaldehyde and liquid-phase phenol. This was ascribed to the high crystallinity, small nanoparticle size and large specific surface area of the sample. Moreover, it was favorable to improve the photogenerated charge separation after modification with a proper amount of phosphoric acid.

引用

页码：1782 / 1787

页数：6

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