Coating of Chlorophylls and Enhanced Photoelectrochemical Capacitor Reaction of TiO/MnO Composite Electrode.

We prepared composite electrodes using TiO coated with chlorophylls and as photoelectric conversion material and MnO as energy storage material and investigated their photoelectrochemical capacitor properties. The coating with the combination of chlorophylls and improved the photoelectric conversion function of TiO, compared with the coating with each alone. Na adsorption on MnO was enhanced with increasing the chlorophyll coating amount. The reason is that more chlorophylls and absorb visible light in different wavelengths to promote an easier photoexcited electron transfer to MnO, just as they improve the efficiency of photosynthesis reactions in nature.