离子液体辅助水热合成CeO2纳米棒

doi:10.15541/jim20140520

无机材料学报 ›› 2015, Vol. 30 ›› Issue (3): 325-329.DOI: 10.15541/jim20140520 CSTR: 32189.14.10.15541/jim20140520

离子液体辅助水热合成CeO₂纳米棒

陈婷, 江伟辉, 张筱君, 谢志翔, 刘健敏, 江莞

(景德镇陶瓷学院材料学院, 景德镇333001)

收稿日期:2014-10-13 出版日期:2015-03-20 网络出版日期:2015-03-06
作者简介:陈婷. E-mail: chenting12@gmail.com

An Ionic Liquid-assisted Hydrothermal Synthesis of CeO₂ Nanorods

CHEN Ting, JIANG Wei-Hui, ZHANG Xiao-Jun, XIE Zhi-Xiang, LIU Jian-Min, JIANG Wan

(School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, China)

Received:2014-10-13 Published:2015-03-20 Online:2015-03-06
About author:CHEN Ting (1984–), female, candidate of PhD. E-mail: chenting12@gmail.com
Supported by:
Foundation item: National Natural Science Foundation of China (51402135, 51432004);Projects of Jiangxi Provincial Department of Science and Technology (20142BAB216006);Youth Science Foundation of Jiangxi Provincial Department of Education (GJJ13621);Project of Jingdezhen Science and Technology Bureau (701301-323);Doctorate Foundation of Jingdezhen Ceramic Institute (101020-00401130136)

摘要/Abstract

摘要：

以CeCl₆•6H₂O 和NH₃•6H₂O为原料, 使用离子液体1-丁基-3甲基咪唑氯盐([Bmim]Cl)辅助水热法在160℃下合成了CeO₂纳米棒。采用X射线衍射(XRD)和高分辨透射电子显微镜(HRTEM)对样品的结构和形貌进行了表征。实验结果表明: 使用离子液体辅助水热法制备的产物为CeO₂纳米棒, 而没有离子液体时产物则为外形无规则的纳米颗粒。所制备的纳米棒直径为13~25 nm, 长度为200~500 nm。增大离子液体的用量将得到纳米颗粒。此外, 升高水热温度至180℃所得样品为直径19~24 nm的纳米球, 该纳米球由2 nm 的纳米晶团聚而成。

关键词: 氧化铈, 软模板, 水热, 离子液体, 纳米棒

Abstract:

CeO₂ nanorods were synthesized by a hydrothermal method at 160℃ from CeCl₆·6H₂O and NH₃·H₂O in the presence of an ionic liquid 1-butyl-3-methyl-imidazolium chloride ([Bmim]Cl). The phase and morphology of the resulting products were characterized by X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM), respectively. The results reveal that morphology of CeO₂ prepared in the presence of the ionic liquid is nanorod while it changes to irregular nanoparticle without ionic liquid. The resulting nanorods are about 13-25 nm in diameter and 200-500 nm in length. With the increase of ionic concentration, nanorods were disappeared gradually and nanoparticles were obtained. Moreover, increasing the hydrothermal temperature to 180℃, nanospheres at size of 19-24 nm could be synthesized by aggregation of ~2 nm nanocrystals.

Key words: cerium oxide, soft template, hydrothermal treatment, ionic liquid, nanorod

中图分类号:

TQ174

陈婷, 江伟辉, 张筱君, 谢志翔, 刘健敏, 江莞. 离子液体辅助水热合成CeO₂纳米棒[J]. 无机材料学报, 2015, 30(3): 325-329.

CHEN Ting, JIANG Wei-Hui, ZHANG Xiao-Jun, XIE Zhi-Xiang, LIU Jian-Min, JIANG Wan. An Ionic Liquid-assisted Hydrothermal Synthesis of CeO₂ Nanorods[J]. Journal of Inorganic Materials, 2015, 30(3): 325-329.

图/表 5

Fig. 1 XRD patterns of the as-synthesized CeO2 in ionic liquid [Bmim]Cl (a), and in absence of [Bmim]Cl (b)

Fig. 2 FT-IR (a), EDS (b) and XPS (c) spectra of the as-synthesized CeO2 nanorods

Fig. 3 Typical SEM (a), TEM (b), HRTEM (c) images of the as-synthesized CeO2 in IL at 160℃ with molar ratio nIL/nCe=1, and TEM image in absence of IL (d)

Fig. 4 TEM images of as-synthesized CeO2 with the molar ratio nIL/nCe=2 at 160℃ (a), nIL/nCe=5 at 160℃ (b), nIL/nCe=2 at 180℃ (c), and the mixed solution before hydrothermal treatment (d)

Fig. 5 Schematic illustration of the formation mechanism of CeO2 with various morphologies via IL combined hydrothermal method

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离子液体辅助水热合成CeO₂纳米棒

An Ionic Liquid-assisted Hydrothermal Synthesis of CeO₂ Nanorods

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