Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 39, Pages 46225-46232Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c09095
Keywords
metal organic frameworks; 2D nanosheet; 2D/3D MOF hybrid nanocomposites; one-step electrochemical synthesis; electrochemical immunosensor
Funding
- National Natural Science Foundation of China [22004034]
- Natural Science Foundation of Hunan Province (China) [2020JJ5226, 2020JJ4346]
- Scientific Research Foundation of Hunan Provincial Education Department (China) [19C0905, 20K063]
- Science Foundation of Hunan Agricultural University [540499818007, 18QN03]
- Foundation of Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Resource Utilization [18KFXM09]
- Foundation of Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle [ES202180064]
- Undergraduate Innovation and Entrepreneurship Training Program of Hunan Province [s202010537027]
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A one-step electrosynthesis strategy for fabrication of 2D Hemin-bridged MOF sheets or 2D/3D Zn(II)-MOF hybrid nanocomposites on an electrode is reported. By controlling electrodeposition times and adding organic ligands, materials with varied morphologies can be obtained, providing a new avenue for preparing high surface area and biomimetic catalysts in the form of 2D/3D MOF hybrid nanocomposites.
To date, two-dimensional (2D) and three-dimensional (3D) metal organic frameworks (MOFs) have been promising materials for applications in electrocatalysis, separation, and sensing. However, the exploration of a simple method for simultaneous fabrication of 2D/3D MOFs on a surface remains challenging. Herein, a one-step and in situ electrosynthesis strategy for fabrication of 2D Hemin-bridged MOF sheets (Hemin-MOFs) or 2D/3D Zn(II)-MOF hybrid nanocomposites on an electrode is reported. It exhibits varied morphologies at different electrodeposition times and attains a 2D/3D complex morphology by adding 1,3,5-benzenetricarboxylic acid (H3BTC) as an organic ligand. The morphology and size of 2D Hemin-MOFs are important factors that influence their performance. Since Pt nanoparticles (PtNPs) are grown on 2D Hemin-MOF sheets, this composite can serve as the peroxidase mimics and PtNPs can act as an anchor to capture the antibody. Therefore, this hybrid nanosheet-modified electrode is used as an electrochemical sensing platform for ultrasensitive pig immunoglobulin G (IgG) and the surface-protective antigen (Spa) protein of Erysipelothrix rhusiopathiae immunodetection. Moreover, this work provides a new avenue for the electrochemical synthesis of 2D/3D MOF hybrid nanocomposites with a high surface area and biomimetic catalysts.
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