水热法可控制备铋铁系化合物材料
李波;孙华君;陈文;张成勇;王一擘;沈杰;周静;刘晓芳
【期刊名称】《无机化学学报》 【年(卷),期】2009(025)010
【摘要】Various purity-phase of bismuth ferrites can be fabricated with Fe(NO_3)_3·9H_2O and Bi(NO_3)_3·5H_2O using the hydrothermal method, while NaOH is used as pH adjuster and mineralizer. The phase of bismuth ferrites is controllable easily by adjusting the concentration range of the NaOH solution. The sillenites Bi_(25)FeO_(40) can be synthesized when 0.1 mol·L~(-1)≤C_(NaOH)≤0.4 mol·L~(-1). The perovskite bismuth ferrites BiFeO_3 can be obtained when the NaOH concentration was from 0.8 to 2.0 mol·L~(-1). The orthorhombic Bi_(25)FeO_(40) can be synthesized when C_(NaOH)≥ 8.0 mol·L~(-1). The highly oriented Bi_2Fe_4O_9 nanosheets can be synthesized using the NaOH concentration of 12.0 mol· L~(-1). At the same time, the growth mechanism of the bismuth ferrites was also discussed.%本文以Fe(NO_3)_3·9H_2O和Bi(NO_3)_3·5H_2O为反应原料,以NaOH为矿化剂,利用水热方法制备出几种纯相的铋铁系化合物材料,通过调节NaOH的浓度范围可以很容易的控制铋铁系化合物的物相.在NaOH浓度为0.1～0.4 mol·L~(-1)区间,可以得到立方相的软铋矿Bi_(25)FeO_(40),当NaOH浓度提高到0.8～2.0 mol·L~(-1)区间,可以得到六方钙钛矿结构的BiFeO_3,再提高NaOH浓度至8.0 mol·L~(-1)以上可以得到正交相的Bi_2Fe_4O_9,在NaOH浓度为12.0
水热法可控制备铋铁系化合物材料
