Facile synthesis of Cu/Co-ZIF nanoarrays for non-enzymatic glucose detection

Abstract

Cu/Co-ZIF nanoflake arrays on carbon cloth are fabricated by controlling the introducing of Cu 2+ ions during the growth of Co-ZIF. The Cu/Co-ZIF-20 electrode prepared with 20 mM Cu 2+ possesses large electrochemically active surface area and bimetallic active sites, which can be revealed by cyclic voltammetry tests. The amperometric i-t measurements demonstrate that the Cu/Co-ZIF-20 electrode displays a wide linear range from 0.05 mM to 6.0 mM, and a high sensitivity of 1.03 mA mM −1 cm −2 . Good selectivity, repeatability and practical applicability indicate its promising application in enzyme-free glucose sensing.

MOF-derived NiCo hydroxide for highly efficient non-enzymatic glucose biosensing

“…Before using, it was cut into 10 * 15 mm 2 , and then cleaned with ethanol absolute, dilute hydrochloric acid and ultrapure water, respectively. The growth of Co-MOF arrays on copper sheet is similar to the previous report [25]. One piece of copper sheet was put into 20 ml mixed solution of 2-methylimidazole and cobalt nitrate hexahydrate.…”

“…To be noted, the peak of nitrogen element is not observed in the survey spectrum. It is reported that there is an obvious peak of nitrogen element in the structure of Co-ZIF fabricated with 2-MIM [25]. So, it can be deduced that the resulted sample do not retain ZIF-L structure.…”

A Mini Overview of Biomedical Utilization of Zeolitic Imidazolate Frameworks

“…Cu/Co-ZIF nanoflake arrays upon carbon cloth exhibit high selectivity, reproducibility, and realworld applicability, pointing to its potential for use in enzyme-free glucose monitoring. With a great sensitivity of 1.03 mAmM −1 cm −2 , the Cu/Co-ZIF-20 electrode exhibits a broad linear range (0.05 mM -6.0 mM) [17]. The ZIF-N 2 customized screen-printed carbon electrode's nonenzymatic glucose sensing capabilities, including long time stability, selectivity, and repeatability, were also shown to be extraordinary [18].…”