Co/Co‐N@Nanoporous Carbon Derived from ZIF‐67: A Highly Sensitive and Selective Electrochemical Dopamine Sensor

Abstract

Co/Co‐N nanoparticles incorporated nitrogen‐doped nanoporous carbon (Co/Co‐N@NPC) nanostructures were fabricated via pyrolysis of metal organic framework, ZIF‐67, under argon atmosphere. The ZIF‐67 derived Co/Co‐N@NPC modified carbon paste electrode exhibited excellent performance during electroanalysis of dopamine, displaying two linear ranges; 10 nM to 50 μM, and 50 μM–500 μM with sensitivity of 12.4±0.3 μA/μM/cm2 and11.69±0.06 μA/μM/cm2, respectively. The modified electrodes were observed to be highly selective towards dopamine even in presence of other interfering biomolecules such as ascorbic acid, glucose and uric acid. To the best of our knowledge, the sensing ability of Co/Co‐N@NPC with a lower limit of detection as 6 nM is the best compared to the previously reported cobalt mediated sensors for dopamine. Practical feasibility of the sensor was demonstrated in real sample analysis of dopamine measurement in human urine samples and dopamine hydrochloride injection samples.

Examining the effects of nitrogen-doped carbon coating on zinc vanadate nanoflowers towards high performance lithium anode

“…There are two peaks in the Raman spectrum at about 1340 and 1600 cm -1 , which can be assigned to amorphous carbon (D-band) and graphitic carbon (G-band), respectively. [49][50] This indicates the presence of carbon in both ZnVAr and ZnVC.…”

A review of zeolitic imidazolate frameworks (ZIFs) as electrochemical sensors for important small biomolecules in human body fluids

“…However, nonporous carbon materials do have other advantageous properties such as large specific surface area, excellent electrical conductivity, low cost, and high chemical stability that make them useful as a sensor substrate in various applications. 84,87,110 N-Doped carbon (CN) materials are promising carbon-based supporting materials due to their unique physical-chemistry properties, which exhibit outstanding sensitivity in biosensors applications and excellent electrocatalytic activity for the oxygen reduction reaction. 69,95 On one hand, CN materials offer various advantages such as diverse synthesis methods, good electron delocalization, excellent electronic transmission performance, simplicity, and diversity of preparation.…”

Highly Sensitive and Reliable Piezoresistive Strain Sensor Based on Cobalt Nanoporous Carbon-Incorporated Laser-Induced Graphene for Smart Healthcare Wearables

“…Among the conductive metal oxides, cobalt nanoporous carbon (Co-NPC) derived from MOFs called zeolitic imidazolate framework-67 (ZIF-67) has been considered a promising material because of its high surface area and porosity. 33,34 MOF-based conductive metal oxides have been selectively varied from a single ZIF-67 to conductive metal oxides, such as Co-NPC and cobalt oxides, depending on the annealing conditions. 35,36 To our knowledge, to date, it has not been conducted on the development of Co-NPC nanomaterials for use in strainsensing applications.…”

“…These materials exhibit high theoretical capacitance values, environmental friendliness, low cost, and high electrochemical stability, making them superior materials for outstanding performance and low-power device or supercapacitor applications. , However, application of MOFs in piezoresistive strain applications is challenging because of their nonconductive properties. Among the conductive metal oxides, cobalt nanoporous carbon (Co-NPC) derived from MOFs called zeolitic imidazolate framework-67 (ZIF-67) has been considered a promising material because of its high surface area and porosity. , MOF-based conductive metal oxides have been selectively varied from a single ZIF-67 to conductive metal oxides, such as Co-NPC and cobalt oxides, depending on the annealing conditions. , To our knowledge, to date, it has not been conducted on the development of Co-NPC nanomaterials for use in strain-sensing applications.…”