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学科主题: Chemistry ; Materials Science
题名: 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
作者: Wang Li; Chang Li-Xian; Wei Lian-Qiang; Xu Shen-Zhi; Zeng Ming-Hua; Pan Shi-Lie
刊名: JOURNAL OF MATERIALS CHEMISTRY
发表日期: 2011
DOI: 10.1039/c1jm12095f
卷: 21, 期:39, 页:15732-15740
收录类别: SCI
资助者: National Natural Science Foundation of China 21065012, 91022015; Natural Science Foundation of Xinjiang Uygur Autonomous Region of China 200821166; Science and Technology Program in support of Xinjiang Uygur Autonomous Region of China 201091244; Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, Yili Normal University; University of the Ministry of Education China NCET-07-217
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.

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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/1459
Appears in Collections:材料物理与化学研究室_期刊论文

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the effect of 1-n-alkyl chain of ionic liquids [cnmim] +br- (n = 2, 4, 6, 8) on the aspect ratio of zno nanorods syntheses, morphology, forming mechanism, photoluminescence and recyclable photocatalytic activity.pdf(640KB)期刊论文作者接受稿开放获取View 联系获取全文

作者单位: Xinjiang Normal Univ, Coll Chem & Chem Engn, Urumqi 830054, Peoples R China;GuangXi Normal Univ, Key Lab Chem & Mol Engn Med Resources, Minist Educ, Sch Chem & Chem Engn, Guilin 541004, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China

Recommended Citation:
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.
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文件名: the effect of 1-n-alkyl chain of ionic liquids [cnmim] +br- (n = 2, 4, 6, 8) on the aspect ratio of zno nanorods syntheses, morphology, forming mechanism, photoluminescence and recyclable photocatalytic activity.pdf
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