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Two metal-quinoline complexes, Fe(III)-8-hydroxyquinoline-5-sulfonic acid (Fe-HQS) and Er(III)-8-hydroxyquinoline-5-sulfonic acid (Er-HQS), were used as sensitizers of TiO2 for improving visible light photocatalytic activity of TiO2. UV–vis spectra, X-ray Diffraction, X-ray Photoelectron Spectroscopy, Scanning Electron Microscope and Transmission Electron Microscope were put to use to characterize...
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