A novel approach for complex sensitization of semiconductors: immobilizing the complex using covalent linkage
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Abstract
This study presents a straightforward and efficient approach for sensitizing titanium dioxide (TiO2) through surface complexation. Epichlorohydrin (ECH), as an industrially significant and cost-effective covalent linker, was successfully grafted onto the surface of n-TiO2-P25. The modified nano-particles were then allowed to react efficiently with ethylene diamine to obtain an immobilized ligand. Subsequently, the prepared nano-particles were treated with solutions of Cu2+, Co2+, and Ni2+ salts to obtain complex-modified photocatalysts. Furthermore, the sensitized nano-particles were applied as effective photocatalysts for the oxidation reaction of benzyl alcohol to benzaldehyde under visible light irradiation, which resulted in short reaction times, high selectivity, and good product yields.
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