![]() |
个人信息Personal Information
副教授
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:化工学院
电子邮箱:lixiangcun@dlut.edu.cn
Synthesis and morphology control of ZnO nanostructures in microemulsions
点击次数:
论文类型:期刊论文
发表时间:2009-05-15
发表刊物:JOURNAL OF COLLOID AND INTERFACE SCIENCE
收录刊物:EI、PubMed、SCIE、Scopus
卷号:333
期号:2
页面范围:465-473
ISSN号:0021-9797
关键字:ZnO nanostructures; Microemulsion; Hydrothermal; PEG molecules
摘要:ZnO nanostructures with different morphologies and optical properties were prepared by a simple microemulsion process, and PEG400 Was used as a directing agent. The samples were characterized by TEM, XRD, FTIR, and TG-DTA analysis. The XRD spectra indicate that the ZnO crystal has a hexagonal wurtzite structure. Needle-like, Columnar, and spherical ZnO samples were synthesized respectively with the increase of PEG400 concentration in Zn(NO(3))(2) solution. TEM images and thermogravimetric analysis reveal that the microemulsion interface and the PEG400 agent have a synergistic effect on the morphology and crystalline size transition of ZnO nanostructures. The optical properties of the samples were investigated by measuring the UV-Vis absorbance spectra at room temperature. All the samples exhibit strong UV absorption at around 365 nm. ZnO products with band gap energies at 3.06. 3.02, 2.95, and 2.85 eV were obtained with 0, 12.5, 25.0, and 50.0% of PEG400 in Zn(NO(3))(2) Solution, respectively. The formation mechanism of the ZnO nanostructures was proposed and discussed in detail. The synergistic control of the microemulsion interface and the agent on the growth of crystal nuclei reported here provides an alternative approach for preparation of other well-defined nanostructures. (C) 2009 Elsevier Inc. All rights reserved.