Selective sensing of hydroquinone and catechol based on multiwalled carbon nanotubes/polydopamine/gold nanoparticles composites

- Multiwalled carbon nanotubes/polydopamine/gold nanoparticles composite (MWCNTs/PDA/AuNPs) was synthetized successfully.
- A novel electrochemical sensor for simultaneous determination of hydroquinone and catechol based on MWCNTs/PDA/AuNPs and chitosan was developed.
- The peak potential of the oxidation peaks of HQ and CC were at 192 mV and 297 mV, respectively, indicating an anodic ΔEp of 105 mV, which is wide enough to separate the two components.
- The sensor showed wide linear responses for HQ and CC with detection limits of 35 nM and 47 nM, respectively.