Microfibers of Embellished Cobalt—Zeolite Imidazole Framework for Vitamin—B₂ Detection

Abstract

Cobalt-Zeolite Imidazole Framework (Co-ZIF) microfibers are synthesized by electrospinning method used for the quantification of Riboflavin (RF). Cobalt ions are tethered uniformly along the surface of the ZIF by electrostatic attraction. Crystalline cobalt ions are interconnected with ZIFs, which makes strongly bonded tetrahedral structure of Co-ZIF providing the improved stability in the composite. The cyclic voltammetric profile reveals , excellent catalytic behavior of the electrodes and the linear plot evidences for interfacial electron transfer of RF to Co-ZIF microfiber modified GCE surface. Interestingly, a selective determination of RF with the linear range of 100 nM to 1 mM with the low limit detection of 81 nM by square wave voltammetry (SWV) technique is demonstrated. The developed RF sensor shows anti-interference ability towards other electroactive species and it has been successfully employed toward the real sample for the detection of RF with good recovery result.

Synthesis, Characterization, and Evaluation of Co-MOF Based ZIF-67 for CO2 Corrosion Inhibition of X65 Steel: Insights from Electrochemical Studies and a Machine Learning Algorithm

“…As shown in Figure ci,ii, the organic ligand (2-methylimidazole) and the transition metal cation (Co) show an orthorhombic structure with intense and sharp peaks, while the as-prepared ZIF-67_NPs (Figure ciii) evidently show their crystalline structure. In the ZIF-67_NPs XRD spectrum, the broad peak region at 25° corresponds to (002) plane of the organic linker (ZIF) showing the existence of carbon, which is line with a previous report . The peaks at 2θ for the as-prepared ZIF-67_NPs are associated with (011), (002), (112), (022), (013), (222), (114), (233), (134), and (044) and confirm the successful incorporation of cobalt ions into the organic matrix and form a rhombic dodecahedral shape.…”

“…In the ZIF-67_NPs XRD spectrum, the broad peak region at 25°corresponds to (002) plane of the organic linker (ZIF) showing the existence of carbon, which is line with a previous report. 23 The peaks at 2θ for the as-prepared ZIF-67_NPs are associated with (011), (002), ( 112), ( 022), ( 013), ( 222), ( 114), ( 233), (134), and (044) and confirm the successful incorporation of cobalt ions into the organic matrix and form a rhombic dodecahedral shape. This observation is consistent with pure cubic spinel JCPDS card no 42−1467.…”