磷酸修饰对纳米Fe2O3热稳定性及光催化性能的影响

doi:10.7503/cjcu20131257

高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (8): 1782.doi: 10.7503/cjcu20131257

磷酸修饰对纳米Fe₂O₃热稳定性及光催化性能的影响

孟庆强, 孙婉婷, 栾云博, 井立强()

黑龙江大学化学化工与材料学院, 功能无机材料化学教育部重点实验室, 哈尔滨 150080

收稿日期:2013-12-20 出版日期:2014-08-10 发布日期:2019-08-01
作者简介:联系人简介: 井立强, 男, 博士, 教授, 博士生导师, 主要从事环境与能源光催化研究. E-mail: jinglq@hlju.edu.cn
基金资助:
国家自然科学基金(批准号: 21071048)、教育部创新团队(批准号: IRT-1237)和教育部科学技术项目(批准号: 213011A)资助

Effects of Phosphate Modification on the Thermal Stability and Photocatalytic Activity of Nanosized Fe₂ $O 3 †$

MENG Qingqiang, SUN Wanting, LUAN Yunbo, JING Liqiang^*()

Key Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China

Received:2013-12-20 Online:2014-08-10 Published:2019-08-01
Contact: JING Liqiang E-mail:jinglq@hlju.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.21071048), the Program for Innovative Research Team in Chinese Universities(No IRT-1237) and the Research Project of Chinese Ministry of Education(No.213011A)

摘要/Abstract

摘要：

通过溶液浸渍蒸干过程实现了磷酸对Fe₂O₃纳米粒子的表面修饰, 研究了磷酸修饰对纳米Fe₂O₃的热稳定性及光催化活性的影响. 结果表明, 磷酸修饰显著提高了Fe₂O₃的热稳定性, 主要归因于磷酸修饰在样品表面抑制了粒子之间的团聚生长. 同时, 在光催化降解气相乙醛和液相苯酚的测试中, 磷酸修饰后热处理温度为600 ℃的样品表现出了最佳的可见光催化性能, 这主要归因于该样品具有高晶化度、小粒子尺寸及大比表面积, 并且适量的修饰有利于其光催化性能的提高.

关键词: 三氧化二铁, 热稳定性, 光生电荷分离, 光催化, 无色污染物降解

Abstract:

α-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 ℃ 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.

Key words: Fe2O3, Thermal stability, Photogenerated charge separation, Photocatalysis, Colorless pollutant degradation

中图分类号:

O643.3

TrendMD:

孟庆强, 孙婉婷, 栾云博, 井立强. 磷酸修饰对纳米Fe₂O₃热稳定性及光催化性能的影响. 高等学校化学学报, 2014, 35(8): 1782.

MENG Qingqiang, SUN Wanting, LUAN Yunbo, JING Liqiang. Effects of Phosphate Modification on the Thermal Stability and Photocatalytic Activity of Nanosized Fe₂ $O 3 †$ . Chem. J. Chinese Universities, 2014, 35(8): 1782.

图/表 8

Fig.1 XRD patterns of different samples a. F-400; b. 1.0P-F-400; c. F-600; d. 1.0P-F-600; e. F-800; f. 1.0P-F-800.

Fig.2 TEM images of samples F-400(A), F-600(B) and 1.0P-F-600(C)

Fig.3 P2p XPS spectra of different samples

Fig.4 DRS spectra of different samples Inset is of samples unmodified by phosphate.

Fig.5 Hydroxyl radical amount-related fluorescence spectra(A, B) and SPS responses(C, D) of different samples

Fig.6 Photocatalytic degradation rates of different Fe2O3 samples(A,B) and different P-Fe2O3 samples(C, D) on acetaldehyde(A, C) and phenol(B, D) (B) After reaction for 2 h; (D) after reaction for 1.5 h.

Fig.7 XRD patterns(A), IR spectra(B), SPS responses(C) and hydroxyl radical amount-related fluorescence spectra(D) of different P-Fe2O3 samples

Fig.8 Photocatalytic degradation rates of different P-Fe2O3 samples on acetaldehyde(A) and phenol(B)

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磷酸修饰对纳米Fe₂O₃热稳定性及光催化性能的影响

Effects of Phosphate Modification on the Thermal Stability and Photocatalytic Activity of Nanosized Fe₂ $O 3 †$

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