Ammonium oxidization at room temperature and plasmonic photocatalytic enhancement

In an alkaline condition, ammonium can be efficiently reduced with hydroxide ion using a spinning disk reactor at room temperature. To some extent, illumination can boost the processing efficiency by warming water. A homogeneous 8 nm crystallized platinum thin film deposited on a B270-glass substrate by plasma-enhanced atomic layer deposition absorbs light from 350 nm to 2500 nm. The absorbed light transforms plasmonic resonance energy on the platinum thin film and forms a high temperature hot layer. The plasmonic heating effect, or plasmonic photocatalytic reaction, enhances the activity of the Pt thin film for the oxidation of NH4+.

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► NH4+ can be efficiently reduced with OH− using SDR at room temperature.
► To some extent, illumination can boost the processing efficiency by warming water.
► Plasmonic heating effect on the 8 nm Pt thin film forms high temperature hot layer.
► Plasmonic PC reaction enhances the oxidation of NH4+ on 8 nm Pt thin film.