논문 초록

Non-enzymatic Amperometric Detection of Phenol and Catechol using Nanoporous Gold
Nanoporous gold (NPG) thin films were found to be capable of directly and reliably sensing phenol andcatechol using amperometric technique at neutral conditions without enzyme. The sensing of phenoland catechol was conducted on NPG based on their different electro-oxidation potentials. The NPG thinfilms exhibited not only good sensitivities but also large linear detection ranges in comparison withthe current state of the art enzyme-based electrodes. They also had a good resistance against surfacefouling, enabling detection at neutral conditions. A good selectivity over various organic and inorganicinterfering agents was also recorded. In particular, although NPG appeared to be a good sensor for bothphenol and catechol, it was found that the NPG was able to selectively determine catechol in the presenceof phenol at an appropriate applied voltage. The achieved results offer potentially promising and simplenon-enzymatic amperometric detection of phenolic compounds in industrial and environmental analysesusing NPG thin film based electrodes.
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