Metal-organic framework derived porous hollow ZnCo2S4 improving electrocatalytic oxidation of glucose

Abstract

In this paper, ZnCo2S4 nanomaterial with a unique structure were synthesized by static and hydrothermal method and applied to the field of electrochemical sensing. Based on the advantages of metal-organic frameworks (MOF) materials with large specific surface areas, multiple active centers, and synergistic effect of multi-metals, we choose Zn and Co bimetallic MOF as the precursor material and synthesized ZnCo2S4 nanomaterials with large active area and multiple active centers after vulcanization. In addition, we verified the excellent electrochemical sensing performance of the prepared ZnCo2S4 nanomaterial through the catalytic oxidation experiment of glucose. The results showed that ZnCo2S4 nanomaterials with bimetallic MOF as a precursor had higher electrocatalytic activity for glucose oxidation than ZnCo2S4 nanomaterials without precursor and single metal sulfide. According to the analysis of the electrochemical performance of the material, the detection limit is extremely low (0.007 μM)and two linear range (3 ∼9 μM) and (10 ∼100 μM)for glucose. Therefore, we believe that the method of preparing polymetallic sulfides with MOF as a precursor is of great significance in electrochemical sensing.