Three MOF-Templated Carbon Nanocomposites for Potential Platforms of Enzyme Immobilization with Improved Electrochemical Performance

• DOI: 10.1021/acsami.8b00702
• Publication Date: 2018-04-06T03:56:43Z
• Authors: Sheying Dong; Lei Peng; Wenbo Wei; Tinglin Huang
• Keywords: Nanomaterials; Specific surface area

An efficient and facile metal-organic framework (MOF)-template strategy for preparing carbon nanocomposites has been developed. First of all, a series metal ions, including Fe3+, Zr4+, La3+, were respectively connected with 2-aminoterephthalate (H2ATA) to form three frameworks (MOFs) then novel MOF-derived materials obtained by annealing them at 550 °C under N2 atmosphere. The morphologies microstructure results showed that they still retained the original structure MOFs formed carbon-supported oxide hybrid nanomaterials. Interestingly, it was found La-MOF-NH2 its derived first reported, which had wool-ball-like many streaky-shaped particles intertwining each other. Furthermore, these all successfully used as effective immobilization matrixes acetylcholinesterase (AChE) construct biosensors detection methyl parathion. Especially, [La-MOF-NH2]N2 not only provided more active sites multicontents increase AChE amount but also facilitated accessibility electron transfer shorten their diffusion length on surface electrode. Under optimal conditions, biosensor based displayed widest linear range 1.0 × 10-13-5.0 10-9 g mL-1 lowest limit 5.8 10-14 in biosensors. This study illustrates feasibility potential improved electrochemical performance.