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以SnCl2.2H2O、C2H2O4.2H2O和La(NO3)3.6H2O为主要原料,采用室温球磨固相法制备La3+掺杂纳米SnO2。利用X射线衍射仪、扫描电镜、紫外分光光度计等分析方法,研究了掺杂量、焙烧温度对粉体粒径、吸收率的影响。结果表明,La3+的掺杂抑制SnO2晶粒的长大,并且随其含量的增加,抑制SnO2长大的效果更明显;La3+的掺杂明显降低了粉体对紫外光的反射能力,增加了粉体对紫外光的吸收能力;在焙烧温度为700℃、La3+掺杂量为2wt%时,得到了对紫外光吸收率最好的粉体。
La3 + -doped nano-SnO2 was prepared by solid-state ball milling at room temperature with SnCl2.2H2O, C2H2O4.2H2O and La (NO3) 3.6H2O as the main raw materials. The effects of doping amount and calcination temperature on the particle size and absorption rate of the powders were studied by X-ray diffraction, scanning electron microscopy and UV spectrophotometer. The results show that the doping of La3 + can inhibit the growth of SnO2 grains, and with the increase of the content, the effect of inhibiting the growth of SnO2 is more obvious. The doping of La3 + significantly reduces the reflectivity of the powder to UV light, The absorption capacity of ultraviolet light was obtained. When the calcination temperature was 700 ℃ and the La3 + doping amount was 2wt%, the powder with the best UV absorbance was obtained.