【摘要】 采用溶剂热法合成了Fe₃O₄/石墨烯复合粉体,并通过X射线衍射（XRD）、傅里叶转换红外光谱（FT-IR）、扫描电子显微镜（SEM）等测试手段,分析了溶剂热反应过程中PVP的添加与否对Fe₃O₄/石墨烯结构和形貌的影响。结果表明,若反应过程中添加PVP,所得样品中Fe₃O₄颗粒尺寸变小,但不影响Fe₃O₄的结构以及其颗粒在石墨烯上的负载;将溶剂热合成产物Fe₃O₄/G和Fe₃O₄/G-PVP分别在氩气保护下500C烧结后,Fe₃O₄/G-500样品中Fe₃O₄颗粒仍然完好的负载在石墨烯片上,样品Fe₃O₄/G-PVP-500中有大量的Fe₃O₄颗粒从石墨烯片上脱落,同时Fee₃O₄颗粒产生了粉碎,以此分析了PVP在溶剂热合成过程中的作用。更多还原

【Abstract】 Fe₃O₄/graphene composite powders have been prepared through a modified solvothermal process.The influence of PVP on structure and morphology of Fe₃O₄/graphene was measured by XRD,FT-IR,and SEM.It was found that the average size of Fe₃O₄ particles with introduction of PVP in solvothermal reaction was smaller than that without PVP.The introduction of PVP did not effect the anchoring of Fe₃O₄particles on graphene.After calcining Fe₃O₄/G and Fe₃O₄/G-PVP composites at 500 ℃ in Ar,Fe₃O₄ particles in the sample of Fe₃O₄/G-500 were still well anchored on graphene sheets.However,numerous Fe₃O₄ particles fell off from graphene sheets and fragmented in the sample of Fe₃O₄/G-PVP-500.The role of PVP in solvothermal process was analyzed.更多还原