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The effect of 1-N-alkyl chain of ionic liquids [C(n)mim]Br-+(-) (n=2, 4, 6, 8) on the aspect ratio of ZnO nanorods: syntheses, morphology, forming mechanism, photoluminescence and recyclable photocatalytic activity
Wang Li; Chang Li-Xian; Wei Lian-Qiang; Xu Shen-Zhi; Zeng Ming-Hua; Pan Shi-Lie
2011
发表期刊JOURNAL OF MATERIALS CHEMISTRY
ISSN0959-9428
卷号21期号:39页码:15732-15740
摘要

Using a pure ionic liquid-assisted solid-state-like synthesis method under 80 degrees C, high quality zinc oxide (ZnO) nanorods in 1-alkyl-3-methylimidazolium and bromide anions ionic liquids C(n)mimBr-+(-) (n = 2, 4, 6, 8) were realized. The size effect of the N-alkyl chains of ionic liquids hindered the further growth of ZnO nanorods and the aspect ratio (length/diameter, L/D) of ZnO nanorods (from 40 : 1, 20 : 1, 10 : 1, to 5 : 1) were realized by rationally tuning the length of the organic cation groups. Long octyl chains (9.93 angstrom) resulted in short ZnO nanorods (with L/D = 5 : 1), otherwise, short ethyl chains (2.53 angstrom) resulted in long ZnO nanorods (with L/D = 40 : 1). The growth mechanism of the above ZnO nanorods was mainly due to electrostatic interactions between cations of the ionic liquids and the ZnO crystal nucleus, causing the preferential growth on the 0001 directions of the hexagonal ZnO. The as-obtained short ZnO nanorods (with L/D = 5 : 1) exhibited defect-related green-yellow emission under UV excitation, and acted as effective recyclable photocatalysts during six photodegradation cycles of the organic dye molecule Rhodamine B, suggesting promising potential for environmental applications. This systematic study highlighted that the structures and morphology of ZnO nanomaterials could be controllable via specifically varying the molecular structure of 1-alkyl-3-methylimidazolium cation-based ionic liquids, and then with the tuned photocatalytic properties and optical and electronic functions of them.

学科领域Chemistry ; Materials Science
DOI10.1039/c1jm12095f
收录类别SCI
WOS记录号WOS:000295278000090
引用统计
被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/1459
专题材料物理与化学研究室
作者单位1.Xinjiang Normal Univ, Coll Chem & Chem Engn, Urumqi 830054, Peoples R China
2.GuangXi Normal Univ, Key Lab Chem & Mol Engn Med Resources, Minist Educ, Sch Chem & Chem Engn, Guilin 541004, Peoples R China
3.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China
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Wang Li,Chang Li-Xian,Wei Lian-Qiang,et al. The effect of 1-N-alkyl chain of ionic liquids [C(n)mim]Br-+(-) (n=2, 4, 6, 8) on the aspect ratio of ZnO nanorods: syntheses, morphology, forming mechanism, photoluminescence and recyclable photocatalytic activity[J]. JOURNAL OF MATERIALS CHEMISTRY,2011,21(39):15732-15740.
APA Wang Li,Chang Li-Xian,Wei Lian-Qiang,Xu Shen-Zhi,Zeng Ming-Hua,&Pan Shi-Lie.(2011).The effect of 1-N-alkyl chain of ionic liquids [C(n)mim]Br-+(-) (n=2, 4, 6, 8) on the aspect ratio of ZnO nanorods: syntheses, morphology, forming mechanism, photoluminescence and recyclable photocatalytic activity.JOURNAL OF MATERIALS CHEMISTRY,21(39),15732-15740.
MLA Wang Li,et al."The effect of 1-N-alkyl chain of ionic liquids [C(n)mim]Br-+(-) (n=2, 4, 6, 8) on the aspect ratio of ZnO nanorods: syntheses, morphology, forming mechanism, photoluminescence and recyclable photocatalytic activity".JOURNAL OF MATERIALS CHEMISTRY 21.39(2011):15732-15740.
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