Synergistic effect of a cobalt fluoroporphyrin and graphene oxide on the simultaneous voltammetric determination of catechol and hydroquinone.

Autor: Huang DL; Department of Chemistry, The Key Laboratory of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou, 510641, China.; College of Chemistry and Environmental Engineering, Shaoguan University, Shaoguan, 512005, China., Wang J; Department of Applied Physics, South China University of Technology, Guangzhou, 510641, China., Cheng F; Department of Chemistry, The Key Laboratory of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou, 510641, China., Ali A; Department of Chemistry, The Key Laboratory of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou, 510641, China., Guo HS; College of Chemistry and Environmental Engineering, Shaoguan University, Shaoguan, 512005, China., Ying X; Department of Applied Physics, South China University of Technology, Guangzhou, 510641, China., Si LP; School of Materials Science and Energy Engineering, Foshan University, Foshan, 528000, China. lipingsi@fosu.edu.cn., Liu HY; Department of Chemistry, The Key Laboratory of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou, 510641, China. chhyliu@scut.edu.cn.
Jazyk: angličtina
Zdroj: Mikrochimica acta [Mikrochim Acta] 2019 May 27; Vol. 186 (6), pp. 381. Date of Electronic Publication: 2019 May 27.
DOI: 10.1007/s00604-019-3417-6
Abstrakt: Graphene oxide (GO) was modified with the cobalt(II) and zinc(II) complexes (CoTFPP and ZnTFPP) of 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin in order to improve the electrocatalytic activity of GO towards catechol (CC) and hydroquinone (HQ). It is found that the CoTFPP-modified GO on a glassy carbon electrode (GCE) displays the highest electrocatalytic activity. The response to CC (at 0.14 V vs. SCE) is linear in the 1-220 μM concentration range. The response to HQ (at 0.04 V vs. SCE) extends from 1 μM to 200 μM. The sensitivity and detection limits are 10.40 μA∙μM -1 ∙cm -2 and 0.17 μM for CC, and 8.40 μA∙μM -1 ∙cm -2 and 0.21 μM for HQ. Experimental results indicate that the Co(II) and Zn(II) ions in the porphyrins positively affect the electron transfer rate in the hybrid materials. The GCE modified with CoTFPP/GO was successfully applied to the simultaneous determination of CC and HQ in spiked samples of tap and lake water. Graphical abstract Schematic presentation of a voltammetric method for simultaneous determination of catechol (CC) and hydroquinone (HQ). It is based on the use of a cobalt (II) fluoroporphyrin (CoTFPP) functionalized graphene oxide (GO) hybrid.
Databáze: MEDLINE
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