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