Microfibers of Embellished Cobalt—Zeolite Imidazole Framework for Vitamin—B 2 Detection

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.