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以硝酸铋和硫化钠为原料,用两步水热法于100℃成功制备了正交晶系Bi2S3微米环;又以硝酸铋和硫脲为原料,采用一步水热法于150℃制备了同属于正交晶系的Bi2S3纳米棒。分别以X射线衍射仪、场发射扫描电镜、透射电子显微镜和荧光分光光度法等测试手段对最终产物的物相、形貌和性质进行了表征,探讨了Bi2S3微米环的形成机理。结果表明:Bi2S3微米环的内径为1～1.5μm、外径为1.5～2μm,由平均尺寸大约为100nm的纳米晶粒组装而成。Bi2S3纳米棒的直径约125nm、长度为1～2μm。Bi2S3微米环和纳米棒状Bi2S3的发光峰分别位于447nm处和470nm处,Bi2S3微米环发光峰的位置相比于Bi2S3纳米棒的发光峰位置明显发生了蓝移。
Abstract：Orthorhombic bismuth sulfide(Bi2S3) microrings were successfully prepared by the two-step hydrothermal method at 100 ℃ using Bi(NO3)3?5H2O and Na2S?9H2O as starting materials;orthorhombic Bi2S3 nanorods were also fabricated by the one-step hydrothermal method at 150 ℃ using Bi(NO3)3?5H2O and thiourea as starting materials.The structure,morphology and lumines-cence properties of the products were characterized by X-ray powder diffraction,field-emission scanning electron microscopy,trans-mission electron microscopy and fluorospectrophotometry.The formation mechanism of Bi2S3 microrings is discussed.The results indicate that the as-prepared Bi2S3 microrings with outer diameters of 1.5-2.0 μm and inner diameters of 1.0-1.5 μm are composed of many nanocrystals with an average size of about 100 nm.The Bi2S3 nanorods have a diameter of about 125 nm and a length of 1-2 μm.The photoluminescence peaks of Bi2S3 microrings and Bi2S3 nanorods are located at 447 and 470 nm,respectively.The photolumi-nescence peak of Bi2S3 microrings has a blue-shift compared with that of Bi2S3 nanorods.
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基本信息:
中图分类号:TB383.1
引用信息:
[1]张卫新,邱沫,张钧君,等.纳米结构Bi_2S_3的制备及其发光特性[J].硅酸盐学报,2009,37(05):827-831.
基金信息:
国家自然科学基金(20871038,20876031);; 安徽省自然科学基金(070414165);; 安徽省高等学校省级科技创新团队计划(TD200702)资助项目
2009-05-15
2009-05-15