摘要
以SnCl2·2H2O和葡萄糖为主要原料,在均相反应仪中于180℃下反应24h,制备得到SnO2与碳复合的纳米粉体,进一步通过热处理去除碳,得到有介孔的SnO2微米球,为了研究热处理温度和保温时间对其物相和微观结构的影响规律,利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对产物的物相及形貌进行表征。结果表明,不同的热处理温度与保温时间对SnO2微观形貌有较大的影响,在400℃、500℃和600℃保温2h得到的产物均为纯相SnO2微米球,该微米球由大约50nm的SnO2纳米晶组装而成,随着热处理温度的升高,SnO2纳米晶的结晶度提高,尺寸增大。在500℃下研究保温时间(0h、2h、4h)的影响规律发现,保温时间为0h时,SnO2呈现出杂乱分布的纳米颗粒,随着保温时间延长,SnO2纳米晶逐渐组装成较为规则的微米球结构。研究结果可为SnO2负极材料的结构设计提供新思路。
The powder of SnO2 and carbon composite was obtained through hydrothermal method under 180℃for 24 h in homogeneous reactor with SnCl2·2 H2O and glucose as the main raw materials.The mesoporous SnO2 micro-spheres were further obtained by removing carbon through heat treatment.The effect of heat treatment temperature and holding time on the phase and microstructure were also investigated through X-ray diffraction(XRD)and scanning electron microscope(SEM).Results show that different heat treatment temperature and holding time have great influence on the SnO2 microstructure.When the product was heated at 400℃,500℃and 600℃for 2 h,pure phase of SnO2 can be obtained.These SnO2 micro-spheres are assembled by many SnO2 nanocrystals with average size of 50 nm.With the increasing of heat treatment temperature,the crystallinity of SnO2 nanocrystals improves and particle size grows.Research on different preservation time(0 h,2 h,4 h)at 500℃,it is found that the SnO2 presents disorganized nanoparticles at beginning and gradually assemble to regular micro-sphere structure with reaction time extending.This nano-structured SnO2 will present potential advantage of lithium storage,which provides novel idea for the structure design of other materials.
作者
程娅伊
谢辉
鲁媛媛
CHENG Ya-yi;XIE Hui;LU Yuan-yuan(School of Material Engineering,Xi′an Aeronautical University,Xi′an 710077,China)
出处
《西安航空学院学报》
2019年第5期29-34,共6页
Journal of Xi’an Aeronautical Institute
基金
陕西省自然科学基础研究计划项目(2019JQ-911)
陕西省教育厅科研计划资助项目(19JK0428)
关键词
热处理
SNO2
微米球结构
水热法
heat treatment
SnO2
micro-sphere structure
hydrothermal method
