纳米铋酸钠的合成及其结构表征

Synthesis and Structural Characterization of Nano-NaBiO_3

采用次氯酸钠浓溶液在强搅拌条件下和强碱性环境中氧化硝酸铋 ,得到纳米铋酸钠晶体 .研究结果表明 ,反应过程中的中间产物氢氧化铋的粒度及分散性能是影响铋酸钠制品的粒度及分散性能的关键因素 .研究了次氯酸钠浓度、硝酸铋浓度和反应时间对纳米铋酸钠制品的粒度和纯度的影响 ,得出了最佳的合成条件 .采用化学分析、TEM、IR、TG-DSC和 XRD等测试手段证实样品的化学组成为 Na Bi O3· 2 H2 O,是粒径为 3 0～ 5 0

Nano-NaBiO 3 crystals were prepared by oxidizing Bi(NO 3) 3 in strongly alkaline concentrated sodium hypochlorite solution with a strong agitation. The results indicates that the particle size and dispersity of the intermediate product, Bi(OH) 3, are the key factors for the preparation of NaBiO 3. The optimal synthesis conditions were obtained through studying the influence of the concentration of sodium hypochlorite and bismuth nitrate solution and reaction time on the purity and granularity of NaBiO 3. The structure of NaBiO 3 was characterized by TEM, infrared spectroscopy, X-ray diffraction and thermogravimetry. The analysis results reveal that the product is NaBiO 3·2H 2O and its particle size is 30_50 nm.