| 引用本文: | 杜立辉,张家敏,杨军,杨开雄,甘国友.Zn含量对溶剂热合成纳米铁氧体颗粒的影响[J].材料科学与工艺,2020,28(6):67-72.DOI:10.11951/j.issn.1005-0299.20190110. |
| DU Lihui,ZHANG Jiamin,YANG Jun,YANG Kaixiong,GAN Guoyou.Effect of Zn content on ferrite nanoparticles by solvothermal method[J].Materials Science and Technology,2020,28(6):67-72.DOI:10.11951/j.issn.1005-0299.20190110. |
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| Zn含量对溶剂热合成纳米铁氧体颗粒的影响 |
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杜立辉1,2,张家敏1,2,杨军1,2,杨开雄1,2,甘国友1,2
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(1.昆明理工大学 材料科学与工程学院,昆明 650093;2.云南省新材料制备与加工重点实验室,昆明 650031)
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| 摘要: |
| 为研究铁氧体液相合成的生长机理及价态变化,以乙二醇为溶剂,乙酸钠作为碱源,采用溶剂热方法合成尖晶石型Mn1-xZnxFe2O4(x=0、0.5、1)纳米颗粒,通过X射线衍射仪、透射电子显微镜、氮吸附比表面仪和光电子能谱仪对样品的物相、微观形貌、比表面积和离子价态进行分析。结果表明:3组样品均为尖晶石结构,未出现杂相,晶粒度从37.5 nm增大至43.2 nm；存在由Fe3+还原而来的Fe2+,Fe3+与Fe2+含量比约为4∶1,导致衍射峰均向右偏移。粉末形貌特征为近球形颗粒,其生长依靠纳米晶之间的定向附着(OA)和自整合。增加Zn2+含量可促进颗粒的整个OA生长过程,粒径95 nm减小至82 nm, 比表面积由45.14 m2/g减小至27.84 m2/g。 |
| 关键词: 铁氧体 溶剂热 纳米颗粒 定向附着 价态 |
| DOI：10.11951/j.issn.1005-0299.20190110 |
| 分类号:TM277 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51464027)；校企基金资助项目(KKZ4201251010). |
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| Effect of Zn content on ferrite nanoparticles by solvothermal method |
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DU Lihui1,2, ZHANG Jiamin1,2, YANG Jun1,2, YANG Kaixiong1,2, GAN Guoyou1,2
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(1.Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2.Key Laboratory of Advanced Materials of Precious-Nonferrous Metals of Yunnan Province, Kunming 650091, China)
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| Abstract: |
| In order to study the growth mechanism and valence changes of liquid phase synthesis of ferrite, spinel Mn1-xZnxFe2O4 (x=0, 0.5, 1) nanoparticles were synthesized by solvothermal method in ethylene glycol(EG) and using NaAc as alkali sources. The phase structure, morphology, specific surface area, and ion valence of samples were characterized by X-ray diffraction (XRD), transmission eletrcon microscopy (TEM), N2 adsorption and X-ray photoelectron spectroscopy (XPS). The results showed that the three samples exhibit spinel structure without impurities, and crystal size increased from 37.5 nm to 43.2 nm. In addition, Fe3+ was reduced to Fe2+, which caused the diffraction peak to shift to the right, and the content ratio of Fe3+: Fe2+ was about 4∶1. The powders, whose growth depends on OA and self-integration between nanocrystals, showed near-spherical morphology characteristics. An increase in the Zn2+ content promoted the whole OA growth process of particles, accompanied by a decrease in grain size from 95 nm to 82 nm, and a decrease in the specific surface area from 45.14 m2/g to 27.84 m2/g. |
| Key words: ferrite solvothermal method nanoparticles oriented attachment ion valence下标 |
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