CAJ | 학술논문

在表面活性剂CTAB水溶液中添加硝酸盐溶液,并滴加氨水,采用水热合成法在180℃的温度下反应9h,制备了La0.7Sr0.3FeO3前驱体,在700℃下煅烧6h后得到La0.7Sr0.3FeO3纳米颗粒组装的纳米线。利用SEM、TEM和XRD对其形貌、尺寸和结构等进行了表征。制备的La0.7Sr0.3FeO3纳米线是由约为20nm的纳米颗粒组装而成的,纳米线的最大长径比达100以上。通过改变水热合成时间和前驱体的煅烧温度等实验条件,对La0.7Sr0.3FeO3纳米线的物相转化和生长机理进行了分析。表面活性剂CTAB作为生长控制剂和颗粒凝聚载体,能够控制材料沿着轴向生长,形成纳米线。
재표면활성제CTAB수용액중첨가초산염용액,병적가안수,채용수열합성법재180℃적온도하반응9h,제비료La0.7Sr0.3FeO3전구체,재700℃하단소6h후득도La0.7Sr0.3FeO3납미과립조장적납미선。이용SEM、TEM화XRD대기형모、척촌화결구등진행료표정。제비적La0.7Sr0.3FeO3납미선시유약위20nm적납미과립조장이성적,납미선적최대장경비체100이상。통과개변수열합성시간화전구체적단소온도등실험조건,대La0.7Sr0.3FeO3납미선적물상전화화생장궤리진행료분석。표면활성제CTAB작위생장공제제화과립응취재체,능구공제재료연착축향생장,형성납미선。
La0. 7 Sr0. 3 FeO3 precursor was synthesized via a hydrothermal method with additive of CTAB in an autoclave at 180℃ for 9h. La0.7Sr0.3FeO3 nanoparticles assembled nanowires were obtained La0.7Sr0. 3FeO3 precur-sor at 700℃ for 6h. The morphology, size and structure were characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The formation and growth mechanism of La0.7 Sr0. 3 FeO3 nanoparticles assembled nanowires was discussed. The results reveal that La0.7 Sr0. 3 FeO3 nanowires were assembled by 20 nm nanoparticles, which were several microns to tens of microns in length and 100 to 150 nm in diameter. The materials experienced a complicated process during the phase transformation. CTAB may be served as a growth controller and an agglomeration inhibitor to control the nanowires grow along the axial direction.