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- Title
Synergistic effect of a cobalt fluoroporphyrin and graphene oxide on the simultaneous voltammetric determination of catechol and hydroquinone.
- Authors
Huang, Dong-Lan; Wang, Jian; Cheng, Fan; Ali, Atif; Guo, Hui-Shi; Ying, Xiao; Si, Li-Ping; Liu, Hai-Yang
- Abstract
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.
- Subjects
HYDROQUINONE; GRAPHENE oxide; METALLOPORPHYRINS; COBALT; CARBON electrodes; CHARGE exchange; DRINKING water
- Publication
Microchimica Acta, 2019, Vol 186, Issue 6, pN.PAG
- ISSN
0026-3672
- Publication type
Article
- DOI
10.1007/s00604-019-3417-6