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Visible-light-driven Cr-doped SrTiO3 was synthesized through ultrasonic chemical method. Its specific surface area is 54.3m2g–1 due to the relatively small particle size. X-ray diffraction pattern and X-ray photoelectron spectra confirmed the crystal structure and Sr substitution. UV–vis absorption spectra indicated that the Cr doping can lead to visible-light absorption. In addition, the oxygen vacancy...
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