酒石酸对直接沉淀法制备纳米Bi_2O_3晶体结构的影响

以高氯酸铋和氢氧化钠为原料,采用一步直接沉淀法,通过添加和控制酒石酸的用量,制备出纺锤形的纳米氧化铋粒子,采用X射线衍射、扫描电镜和差热分析等手段对产品进行分析与表征,并且对反应机理进行初步分析。结果表明:当酒石酸盐的质量分数为8%左右时,合成的纳米氧化铋为纺锤形,粒子分布均匀,粒度较小,平均粒度约为90 nm。

Effect of Tartaric Acid on Crystal Type of Bismuth Oxide Nano-particles Prepared by Direct Precipitation Method

Using Bi(ClO3)3 and NaOH as raw materials,adding and controlling the concentration of tartaric acid,the spindle bismuth oxide nano-particles were synthesized by direct precipitation method.The particles characterized by X ray diffraction(XRD),scan electron microscopy(SEM) and thermogravimetry-differential scanning calorimetry(TGDSC).The reaction mechanism of bismuth oxide nano-particles was discussed.The results showed that the as-prepared bismuth oxide nano-particles had uniform size distribution and smaller granularity,when the mass fraction of tartaric acid was 8%,the mean particle size was about 90 nm.