摘要
以钛酸丁酯为前驱体,冰乙酸和无水乙醇为溶剂,以Fe(NO_3)·9H_2O为掺杂剂,采用水热法制备出Fe掺杂纳米二氧化钛粉体。通过X射线衍射仪(XRD)、透射电子显微镜(TEM)和紫外-可见分光光度计(UV-Vis)对样品的晶型结构、微观形貌和光学行为等进行表征,研究水热反应温度、时间、Fe~(3+)的掺杂量对TiO_2粉体的影响。结果表明:随着水热处理时间、温度和Fe~(3+)掺杂量的变化,所得粉体均为锐钛矿相TiO_2纳米粉体,没有出现其他杂相。通过掺杂,XRD射线衍射峰强度有所降低,TiO_2晶粒生长受到抑制,晶粒平均粒径为10 nm左右。Fe~(3+)掺杂量为摩尔分数1%时,纳米TiO_2光吸收强度最强。
Using tetrabutyl titanate as the titanium source,the glacial acetic acid and absolute ethanol as solvent,and the Fe(NO_3)·9 H_2O as the dopant,the Fe doped TiO_2 nano powders were prepared by the hydrothermal method.The crystal structure,microstructure of the samples were analyzed by X-ray diffraction(XRD) and transmission electron microscopy(TEM),respectively.The optical properties of the samples were measured by ultraviolet visible spectrophotometer(UV-Vis),to study the influence of hydrothermal reaction temperature,time and doping amount of Fe~(3+) on TiO_2 powders.The results indicate that with the change of heat treatment time,temperature and Fe~(3+ )doping amount,the powders are all anatase TiO_(2 )nano powder,and there is no other heterozygous phases.Through doping,the peak intensity of X-ray diffraction is decreased and the grain size of TiO_2 is inhibited.The obtained grain size of the grain is about 10 nm.When Fe~(3+) doping amount is 1%(mole fraction),the intensity of TiO_2 absorption is the strongest.
引文
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