Abstract
A novel EDAPbCl4 @ZIF-67 (EDA = ethylenediammonium) nanocomposite material was successfully prepared by embedding a hybrid organic-inorganic perovskites (HOIPs) into a porous zeolite imidazolate frame structure material (Zeolitic Imidazolate Frameworks, ZIFs). The electrochemical sensor was fabricated through dropping EDAPbCl4 @ZIF-67 onto the surface of glassy carbon electrode (GCE) and applied to the detection of protocatechuic acid (PCA). The results of a series of electrochemical performance tests including cyclic voltammetry (CV) and differential pulse voltammetry (DPV) showed that EDAPbCl4 @ZIF-67/GCE could amplify the signal of the electrochemical response to the oxidation of PCA. The peak current of EDAPbCl4 @ZIF-67/GCE was linearly increased with the concentration in the range of 22–337 μM. The linear regression equation was I(μA)= 0.0031 C (μM)+ 1.6968 (R2 =0.9916), the detection limit (S/N = 3) was 15 μM. Meanwhile, EDAPbCl4 @ZIF-67/GCE can effectively detect PCA in green tea and cough syrup.Its relatively excellent sensitivity indicated that the hybrid organic-inorganic perovskite (EDAPbCl4 @ZIF-67) was feasible to be used as electrochemical sensor material.
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