Abstract
Cr-doped ZnO nanowires were fabricated by a solvothermal route from Zn(NO3)26H2O, Cr(NO3)39H2O and NaOH. Inductively coupled plasma optical emission spectroscopy, X-ray diffraction, transmission electron microscopy, and high resolution transmission electron microscopy results confirmed the doping of Cr into ZnO lattices. UV–vis absorption spectra of both pure ZnO and Cr-doped ZnO displayed a band gap absorption peak at about 365nm. However, compared with pure ZnO, an additional broad tail from approximately 400nm to 750nm appeared in the UV–vis absorption spectrum of Cr-doped ZnO. The photocatalytic studies indicated that the as-synthesized Cr-doped ZnO nanowires were a kind of promising photocatalyst in remediation of water polluted by some chemically stable azo dyes under visible light.
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