【摘要】 采用Fe,cu,Mg掺杂合成纳米ZnO粉末.透射电镜照片表明:不同掺杂对ZnO形状、粒径和粒径分布影响不大,纳米ZnO和掺杂后的纳米ZnO粒径都在30-80nm之间,统计平均粒径为50nm.通过对不同掺杂的纳米ZnO的紫外-可见光吸收光谱的分析对比发现:掺杂改变了纳米ZnO微粉的吸收波长和透过率,掺杂后的纳米ZnO吸收带有明显的蓝移或红移现象.其中:掺杂Fe对纳米ZnO的影响最大,吸收波长从400nm蓝移到315nm,在315-700nm之间透过率从0.256％渐渐上升到4.872％;掺杂Mg则出现红移,吸收波长从400nm红移到500nm,在500～700nm之间透过率从0.221％上升到3.816％;而掺杂Cu的影响最小,仅有20nm的蓝移,在380～700 nm之间,透过率从0.080％仅提高到1.471％.更多还原

【Abstract】 ZnO nanopowder doped with Fe, Mg and Cu were synthesized. The TEM photographs show that the shapes, diameters and diameter distributions of the doped ZnO nanopowders vary little with the metal ions, and the diameters of the particles with doping or without doping are all 30 - 80 nm, with the same statistic average diameter of 50 nm. By comparing and analyzing the UV-Vis absorption spectra of nanosized ZnO doped with different metal ions, it is found that the doping changes the absorption wavelength and transmission of ZnO nanopowder and causes obvious blue immigration or red immigration. Fe doping has the greatest influence on the blue immigration, the absorption wavelength of the nanosized ZnO doped with Fe changes from 400 nm to 315nm and the transmission at 315 -700nm increases from 0.256% to 4. 872% . ZnO doped with Mg shows a red immigration and its absorption wavelength changes from 400nm to 500nm, while the transmission at 500 -700nm increases from 0.221% to 3.816%. ZnO doped with Cu shows a blue immigration of only 20nm, and the transmission at 380 - 700 nm increases from 0.080% to 1. 471 %更多还原