Improved photoelectrochemical detection of mercury (II) with a TiO2-modified composite photoelectrode

- We have determined that a PANI-RS modified photoelectrode behaved as a photoanode in the presence of Hg2+.
- The photoresponse of the ITO/TiO2/PANI-RS photoelectrode was equivalent to the amount of Hg2+ in solution.
- The linear range for photoelectrochemical detection of Hg2+ was 10-200 μg L−1 Hg2+ with a LOQ of 4 μg L−1.
- We determined that the pH independence of ITO/TiO2/PANI-RS photoelectrode was limit by the TiO2 layer to between pH 6 and 7.