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CLC number: O614.81

On-line Access: 2017-04-05

Received: 2016-05-26

Revision Accepted: 2016-09-25

Crosschecked: 2017-03-09

Cited: 0

Clicked: 1601

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Xin Wang

http://orcid.org/0000-0003-2171-8583

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Journal of Zhejiang University SCIENCE A 2017 Vol.18 No.4 P.306-312

http://doi.org/10.1631/jzus.A1600399


Syntheses and characterizations of alloyed CoxNi1−xO nanocrystals


Author(s):  Xin Wang, Zhi-zhen Ye, Yi-zheng Jin

Affiliation(s):  State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   yezz@zju.edu.cn, yizhengjin@zju.edu.cn

Key Words:  Alloying, Nickel oxide, Cobalt oxide, Colloidal nanocrystals


Xin Wang, Zhi-zhen Ye, Yi-zheng Jin. Syntheses and characterizations of alloyed CoxNi1−xO nanocrystals[J]. Journal of Zhejiang University Science A, 2017, 18(4): 306-312.

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author="Xin Wang, Zhi-zhen Ye, Yi-zheng Jin",
journal="Journal of Zhejiang University Science A",
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doi="10.1631/jzus.A1600399"
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%T Syntheses and characterizations of alloyed CoxNi1−xO nanocrystals
%A Xin Wang
%A Zhi-zhen Ye
%A Yi-zheng Jin
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T1 - Syntheses and characterizations of alloyed CoxNi1−xO nanocrystals
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1600399


Abstract: 
alloying is an effective way to manipulate the composition and physico-chemical properties of functional materials. We demonstrated the syntheses of alloyed CoxNi1−xO nanocrystals using a nonaqueous approach, with x continuously tuned from 0 to 1 by varying the molar ratios of the cobalt precursor in the reagents. The morphological, structural, and compositional properties of the alloyed CoxNi1−xO nanocrystals were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), and energy dispersive X-ray spectroscopy (EDS). The results showed that the cobalt and nickel atoms were homogeneously distributed in the alloyed nanocrystals. The as-prepared CoxNi1−xO nanocrystals can be applied as the hole-transporting layers in polymer light emitting diodes (PLEDs). Our study provides a good example for the syntheses of alloyed oxide nanocrystals with continuously tunable composition.

This manuscript reports the syntheses of alloyed CoxNi1-xO nanocrystals by the protecting-ligand assisted approach, with x can be tuned from 0 to 1. The authors conducted detailed characterizations and provided solid evidences on the formation of alloyed nanocrystals. This work is of interest for the material scientists and chemists working in the field of colloidal nanocrystals.

CoxNi1-xO合金纳米晶的合成与表征

目的:合成成分连续可调的CoxNi1-xO合金纳米晶,揭示CoxNi1-xO合金纳米晶的形貌和晶体结构随纳米晶中钴离子含量的变化规律以及考察金属离子在合金纳米晶的分布情况.
创新点:1. 利用金属羧酸盐在有机体系中的醇解反应制备CoxNi1-xO合金纳米晶,其反应温度仅为270 °C,显著低于文献报道中所使用的温度;2. 成功实现CoxNi1-xO纳米晶成分的调节,发现纳米晶形貌随成分的变化规律;3. 揭示了金属离子在合金纳米晶中的均匀分布.
方法:1. 在硬脂酸锂的"配体保护"作用下,利用金属羧酸盐的醇解反应制备CoxNi1-xO合金纳米晶;2. 利用透射电子显微镜、X射线衍射、原子发射光谱和X射线光电子等手段研究CoxNi1-xO合金纳米晶的形貌、晶体结构、成分和金属离子价态等信息.
结论:1. 成功地制备出高质量的CoxNi1-xO (x∈[0, 1])合金纳米晶;2. 发现CoxNi1-xO合金纳米晶的形貌和晶体结构随纳米晶中钴离子浓度的提高呈现出由NiO特征过渡到CoO特征的趋势;3. 对单颗CoxNi1-xO合金纳米晶的元素扫描揭示了金属离子在纳米晶中的均匀分布.

关键词:合金化;氧化镍;氧化钴;胶体纳米晶

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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