B. Yao, Chao-Chi Peng, W. Zhang
Sep 1, 2015
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Quality indicators
Journal
Applied Catalysis B-environmental
Abstract
Abstract The metalloporphyrin tetra-carboxyphenylporphyrin iron(III) (FeTCPP) was synthesized and characterized spectroscopically. The corresponding FeTCPP-SSA/SA-TiO 2 conjugated photocatalysts were then prepared by surface chemical bonding with FeTCPP as sensitizer, 2-hydroxy-5-sulfosalicylic acid (SSA) or salicylic acid (SA) as bridging molecule, and Degussa P25 as raw material. The analysis of FT-IR and XPS spectra reveals that the specific organic complexes formed on the TiO 2 surface are linking FeTCPP molecules to TiO 2 through stable π-conjugated chemical bonds rather than physical adsorption. The morphology and structure of the as-prepared samples were characterized by UV–visible, XRD, SEM, UV–vis DRS and BET. Methylene blue (MB), as a photocatalytic degradation target, was used to evaluate the photocatalytic performance of the prepared photocatalysts. The results show that FeTCPP-SSA-TiO 2 exhibits the best photocatalytic activity among all the samples under visible light. And the new conjugated photocatalyst can be recycled 5 times, while remaining at a 90.0% MB degradation ratio.