Porphyrin nanosphere–graphene oxide composite for ehanced electrochemiluminescence and sensitive detection of Fe3+ in human serum

• DOI: 10.1016/j.snb.2017.10.122
• Publication Date: 2017-10-24T18:02:03Z
• Authors: Linfang Li; Xinming Ning; Yaxuan Qian; Guiqiang Pu; Yanfeng Wang; Xiaohui Zhang; Huan Wang; Jing Chen; Duoliang Shan; Xiaoquan Lu
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract An original electrochemiluminescent (ECL) luminophore porphyrin nanosphere–graphene oxide composite (TCPP NS-GO) was prepared. The TCPP NS-GO could produce greatly enhanced ECL in buffer with potassium peroxydisulfate (K 2 S 2 O 8 ) as the co-reactant. The enhancement ECL mechanism of TCPP NS-GO/K 2 S 2 O 8 system was investigated in detail. Moreover, The TCPP NS-GO composite had an abundant surface functional group to expand its application, which exhibited high sensitivity and selectivity to Fe 3+ . The wide linear relationship between ECL intensity and Fe 3+ concentration from 0.002 to 5.128 μmol L −1 (R 2 = 0.998) was found with the detection limit as low as 1 nmol L −1 . The ECL quenching mechanism of Fe 3+ was proved by UV-vis absorption spectroscopy, Fluorescence emission spectroscopy (FL) and Fourier transform infrared spectroscopy (FT-IR) analysis technology.