Abstract
An electrochemical dopamine (DA) sensor was developed based on WS2 nanospheres-carbon nanofibers (WS2 NSs-CNFs) electrode. Carbon nanofibers (CNFs) were synthesized by electrospinning and then WS2 nanospheres (WS2 NSs) were grown on the CNFs by a hydrothermal process. The WS2 NSs-CNFs composite was used for electrochemical detection of DA in the presence/absence of uric acid. The results show that sugar-gourd shaped WS2 NSs are grown dispersedly on the surface of CNFs. The sensitivity of WS2 NSs-CNFs electrode for DA is 5.36μA·μM−1·cm−2 in the concentration range of 0.5–60μM and the limit of detection (LOD) is 0.01μM. Moreover, the electrode also exhibits good selectivity, reproducibility and stability. The WS2 NSs-CNFs electrode was also employed for analysis of the biomolecular content in human urine, exhibiting desirable results.
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