Renewable Surface Carbon-composite Electrode Bulk Modified with GQD-RuCl3 Nano-composite for High Sensitive Detection of mallCaps">l-tyrosine
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- 作者：Esmaeil Habibi and Hassan Heidari
- 刊名：Electroanalysis
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：28
- 期：10
- 页码：2559-2564
- 全文大小：1067K
- ISSN：1521-4109
文摘
The ability to analytically detect mallCaps">l-tyrosine is a clinical necessity not only for the diagnosis of some diseases such as tyrosinemia, but also for the study on various tyrosine-associated disorders. In here, graphene quantum dot (GQD) was synthesized by carbonization of citric acid and used to prepare GQD-RuCl3 nano-composite. GQD and GQD-RuCl3 were characterized by Fourier transform infrared (FTIR) and Transmission electron microscopy (TEM). Next the nano-composite was modified with carbon-composite electrode (CCE) and the electrochemical properties of GQD-RuCl3|CCE were studied by cyclic voltammetry (CV). This bulk modified electrode showed good electrocatalytic activity for mallCaps">l-tyrosine oxidation. The values of the detection limit and sensitivity were obtained as 0.23 µM and 90 nA/µM. The results indicated that the synergistic incorporation of RuCl3 with GQD conspicuously promotes the sensitivity of the sensor. Moreover, the sensor showed long-term stability and good selectivity towards the detection of mallCaps">l-tyrosine.