Ultra-Small Au(0) Inserted Hollow PCN-222 MOF for The High-Sensitive Detection of Estradiol

Here, the effect of morphology on the electrocatalytic activity of MOF was investigated. Post synthetic gold (Au) insertion was done into hollow PCN-222 (HPCN-222) and solid PCN-222 (SPCN-222) framework by a simple hydrothermal method. The crystalline nature, chemical composition, and morphologies of the synthesized MOFs were characterized by PXRD, XPS, and TEM. Electrochemical characterizations were done by cyclic voltammetry and electrochemical impedance spectroscopy. The excel-lent electro-catalytic activity of highly small-sized Au(0) with the enhancement of electrical conductivity through hopping mechanism combined with a hollow structure and high surface area in the HPCN-222 MOF hugely alters the electrochemical prop-erties. Overall a better electrocatalytic surface area, charge transfer co-efficient, and catalytic activity were generated at the modi-fied electrode. The hollow structure MOF was shown better electrocatalytic activity than solid structured MOF. The AuHPCN-222 modified glassy carbon el...