采用水热法,以CeCl3·7H2O为铈源、NaOH为矿化剂、乙二胺为络合剂,通过改变反应时间制备出CeO2纳米棒.通过X射线衍射仪(XRD)、扫描电镜(SEM)、透射电镜(TEM)、X射线光电子能谱(XPS)、紫外可见近红外分光光度计(UV-Vis)和荧光光谱(PL)对产物进行表征,结果表明产物中存在缺陷,Ce的主要价态为+4价且产物中存在少量Ce3.当反应时间为2h、18 h、50 h、100 h所得产物能带间隙分别为3.014 eV、3.143 eV、2.931 eV、2.927eV,这些数据比块状CeO2带隙小,样品带隙红移是由氧空位与Ce3引起的.四个样品的荧光光谱呈现出相似的发射峰,发射峰强度随着氧空位与Ce3浓度的增加而增加.
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