Fabrication of nickel ferrite-graphene nanocomposites and their photocatalytic properties

被引：15

作者：

Zhao, D. F. ^{[1
]}

Yang, H. ^{[1
,2
]}

Li, R. S. ^{[1
]}

Ma, J. Y. ^{[1
]}

Feng, W. J. ^{[1
]}

机构：

[1] Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China

[2] Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China

来源：

MATERIALS RESEARCH INNOVATIONS | 2014年 / 18卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Polyacrylamide gel route; NiFe2O4-graphene nanocomposites; Photocatalysis; Hydroxy radicals; BIVO4; PHOTOCATALYST; NANOPARTICLES; PERFORMANCE; COMPOSITE;

D O I：

10.1179/1433075X13Y.0000000178

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

NiFe2O4 nanoparticles with an average grain size of 31 nm were synthesised by a polyacrylamide gel route. Their bandgap energy obtained by ultraviolet-visible diffuse reflectance spectroscopy is 1.85 eV. NiFe2O4-graphene nanocomposites were fabricated by mixing NiFe2O4 nanoparticles and graphene into absolute ethanol solution followed by thermal drying. Transmission electron microscopy observation shows that NiFe2O4 nanoparticles are well assembled onto graphene sheets. The photocatalytic activity of prepared samples was evaluated by degrading methylene blue under irradiation of simulated sunlight. It is revealed that NiFe2O4-graphene nanocomposites exhibit significantly enhanced photocatalytic activity compared to bare NiFe2O4 nanoparticles. Hydroxyl (center dot OH) radicals were detected by the photoluminescence technique using terephthalic acid as a probe molecule and are found to be produced on the irradiated NiFe2O4-graphene nanocomposites. Based on the experimental results, center dot OH radicals are suggested to be the major active species responsible for the degradation reaction.

引用

页码：519 / 523

页数：5

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