Abstract

Tris(8-hydroxyquinoline-5-sulfonic acid) iron(III) complex (Fe(HQS)3) was prepared and characterized by elemental analysis, infrared, nuclear magnetic resonance and Raman spectrum. The results indicated that the Fe atom was located at the center of the Fe(HQS)3complex and the sulfonic groups did not present in the quinoline three-coordinate structure. The TGA analysis result showed that the three ligands were thermally stable within wide temperature range (364 °C, 512 °C, 628 °C,). According to XRD and UV-vis data, the nano-TiO2prepared by hydrothermal method was mainly in the form of anatase and brookite, and the Fe(HQS)3complex had single crystal structure. Neither Fe(HQS)3nor nano-TiO2has observable photocatalytic activity according to the result of our methyl orange degrading experiment. The Fe(HQS)3-TiO2complex, however, demonstrated strong spectral response and photocatalytic activity under visible light.

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