Abstract
By applying pulsed electrodeposition instead of continuous electrodeposition for the consecutive preparation of each layer, a favorable modification is targeted of photoelectrocatalytic activity of the couple. The morphology, structure, and related composition distribution of the films onto stainless steel substrates are characterized by scanning electron microscopy–energy-dispersive spectroscopy and Raman spectroscopy. The photocurrents at photoelectrodes with various loading, structure, and morphology are evaluated in the presence and absence of the model pollutants Na-oxalate and 4-chlorophenol (4-CP) under UV and visible light illumination. The effectiveness for bulk photodecomposition of 4-CP is estimated by long-term photoelectrolysis at constant potential using spectrophotometry. An increase (relative to single ) in the photoelectrocatalytic activity of under visible light is noticed and discussed. Clear indications are observed for the need to optimize the loading, surface morphology, structure, and composition distribution to design high performance photocatalysts.
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