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采用超声化学沉积法制备了ZnS:Mn2+/聚苯乙烯核壳结构和ZnS:Mn2+空心球.产物分别用透射电镜、X射线衍射仪和光致发光谱进行了表征.透射电镜结果表明,在聚苯乙烯胶体微球表面覆盖了平均尺寸为9nm的ZnS:Mn2+纳米颗粒,X射线衍射结果进一步验证了这个结论.将核壳粒子在500℃灼烧除去PS核后,可以得到空心的ZnS:Mn2+微球,Mn2+的发射谱的峰位在540nm,与体相材料相比,蓝移了45nm,这可能是由于壳层结构引起Mn-O八面体畸变,进而导致能带结构变化引起的. 相似文献
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Large size single crystals of [Zn(en)3]SO4 have been successfully grown by a hydrothermal process at 160℃ for 24h, using CuSO4·5H2O, ethylene diamine and reductive Zn powder as reactants. The diameters of the single crystals are range from 0.5mm to 1mm, and lengths reach up to 20mm. The single crystals were characterized by XRD analysis, FTIR and UV-Vis spectrum absorption measurements. The single crystal was confirmed to be [Zn(en)3]SO4 by performing powder diffraction of the single crystal. X-ray diffraction of the single crystals shows (100)-face to be cleavage face. The diffraction peaks are sharp and rocking curve for 200 diffraction has a narrow FWHM (the full width at half maximum), which indicate the single crystal of [Zn(en)3]SO4 is perfect with less lattice distortion and defects. The single crystal appears transparent,and has constant weak absorption in UV-Vis spectrum region,which could be used as a novel optical crystal material. 相似文献
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