Surfactant-free synthesis, photocatalytic and electrochemical property study of Co3O4 nanoparticles

被引：25
|
作者：
Huang, Zhifang [1 ,3 ]
Zhao, Yan [1 ,2 ]
Xu, Haitao [1 ]
Zhao, Jingzhe [1 ]
机构：
[1] Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China
[2] Brown Univ, Dept Chem, Providence, RI 02912 USA
[3] Nanchang Normal Univ, Dept Chem, Nanchang 330032, Jiangxi, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2018年 / 100卷
基金：
中国国家自然科学基金;
关键词：
Co3O4; Nanoparticles; Size control; Photocatalyst; Supercapacitor; COBALT OXIDE CO3O4; ASSISTED SYNTHESIS; MESOPOROUS CO3O4; OXIDATION; DEGRADATION; MICROSPHERES; MORPHOLOGIES; TEMPERATURE; COMBUSTION; NANOSHEETS;
D O I：
10.1016/j.materresbull.2017.12.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A facile surfactant-free route for size-control preparation of Co3O4 nanoparticles in aqueous solution was reported. The feeding ratio of OH to Co-2 influences the conversion of Co2+ to Co3O4 crystals, and affects the crystallinity of the final Co3O4 products. The size of Co3O4 nanoparticles can be controlled to be 15, 18, 27 and 30 nm by simply regulating the concentration of NaOH solution through a,p-Co(OH)(2) -> Co3O4 process. A linear relationship between Co3O4 size and NaOH concentration was found. The photocatalytic property for rhodamine B (RhB) degradation and electrochemical property for supercapacitor of the Co3O4 nanoparticles are size dependent. Co3O4 nanoparticles in the size of 15 nm showed the highest photocatalytic efficiency of 70% in pH 3 under visible-light irradiation for 3 h, and behaved the highest specific capacitance of 177 F g(-1).
引用
收藏
页码：83 / 90
页数：8
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