Bimetallic-organic framework derived porous Co3O4/Fe3O4/C-loaded g-C3N4 nanocomposites as non-enzymic electrocatalysis oxidization toward ascorbic acid, dopamine acid, and uric acid

被引：93

作者：

Hu, Bin ^{[1
]}

Liu, Yongkang ^{[1
]}

Wang, Zhuo-Wei ^{[1
]}

Song, Yingpan ^{[1
]}

Wang, Minghua ^{[1
]}

Zhang, Zhihong ^{[1
]}

Liu, Chun-Sen ^{[1
]}

机构：

[1] Zhengzhou Univ Light Ind, Henan Prov Key Lab Surface & Interface Sci, 136 Sci Ave, Zhengzhou 450001, Henan, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2018年 / 441卷

基金：

中国国家自然科学基金;

关键词：

Co/Fe bimetallic organic framework; g-C3N4; nanosheets; Simultaneous detection; Co3O4/Fe3O4/C nanocomposites; GRAPHITIC CARBON NITRIDE; SIMULTANEOUS VOLTAMMETRIC DETERMINATION; METAL-FREE ELECTROCATALYST; OXYGEN REDUCTION REACTION; GRAPHENE OXIDE; VISIBLE-LIGHT; CONTROLLABLE SYNTHESIS; FE3O4; NANOPARTICLES; HYDROGEN EVOLUTION; MODIFIED ELECTRODE;

D O I：

10.1016/j.apsusc.2018.02.093

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on the synthesis of Co- and Fe-based bimetallic nanocatalysts embedded in mesoporous carbon and g-C3N4 nanosheets (denoted as Co3O4/Fe3O4/mC@g-C3N4) for selectively simultaneous determination of ascorbic acid (AA), dopamine acid (DA), and uric acid (UA). These electrocatalysts consisting of bimetallic Co-Fe alloy nanoparticles encapsulated in N-doped carbon matrix were prepared via pyrolysis of Co/Fe-MOFs after grinding with high amounts of melamine. Chemical/crystal structures suggest high contents of mesoporous carbon in calcinated Co3O4/Fe3O4/mC nanocomposites, which exhibited enhanced electrocatalytic activity toward small biomolecules. The intrinsic performances of Co/Fe-MOFs with large specific surface area and regular nodes in the two-dimensional nanostructured g-C3N4 nanosheets endowed the as-prepared series of Co3O4/Fe3O4/mC@g-C3N4 nanocomposites with remarkable electrocatalytic activities and high adsorption ability toward oxidation of AA, DA, and UA. The developed biosensors also showed long-term stability and high selectivity for targeted analytes, with satisfactory results on actual samples in human urine. The results indicate that the as-synthesized Co3O4/Fe3O4/mC@g-C3N4 nanostructure exhibits good electrocatalytic activity and potential applications in clinical diagnosis and biosensing. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：694 / 707

页数：14

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