摘要
采用液相沉淀法制备了结晶型FeVO4,借助X射线衍射（XRD）和SEM等分析方法,考察了溶液pH值和反应温度对沉淀产物的影响.结果表明：在pH值为1.5~2,温度25℃,n（V）/n（Fe）为1和静置时间60 min的条件下,获得了粒度比较均匀、形貌比较规则且呈球形的钒酸铁晶体;随着pH值增加,沉淀物中出现了Fe2O3相,FeVO4相消失;温度对钒酸铁的制备影响也较大,升高温度的同时需要及时调整pH值.
Crystalline FeWO4 was prepared by liquid precipitation. The effects of pH value and reaction temperature on precipitates were investigated by X-ray diffraction （XRD）and scanning electron microscopy（SEM）. The results indicated that crystalline FeVO4 with regularly spherical in the shape and fine grain size is obtained under the conditions of reaction temperature at 25 ℃, pH value of 1.5 - 2, n（ V）/n（Fe） = 1, and the standing time of 60 min. With the increase of pH value, Fe2O3 phase appears, and FeVO4 phase disappears. The temperature affects greatly on the preparation of iron vanadate, and once the temperature increases, the pH value needs to be adiusted.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第1期33-37,共5页
Journal of Northeastern University(Natural Science)
基金
国家重点基础研究发展计划项目(2012CB626812)
关键词
钒酸铁
结晶
液相沉淀法
PH值
温度
iron vanadate
crystallization
liquid precipitation
pH value
temperature
