| 光谱学与光谱分析 |
|
|
|
|
|
| Study on the Preparation and Spectral Characteristics of CeO2 Nanocrystallines |
| HAN Qiao-feng, CHEN Liang, QIANG Fei, ZHU Wen-chao, XU Bing, WANG Xin |
| Key Laboratory of Soft Chemistry and Function Material, Ministry of Education,Nanjing University of Science and Technology, Nanjing 210094, China |
|
|
|
|
Abstract Ceria (CeO2) nanoparticles were prepared by precipitation method using cerium nitrate(Ce(NO3)3·6H2O)and ammonia (25 Wt%) as raw materials under the reaction for 3 h and ageing for 9 h at 80 ℃ without any surfactants and further calcination. The powder X-ray diffraction (XRD) pattern shows the as-prepared CeO2 crystals belong to the cubic phase and are well crystallized. Transmission electron microscopic (TEM) studies reveal that the appearance of as-prepared CeO2 is hexagonal, which is proposed to be the projection of polyhedral shape. The regular fringes spacing of 0.31 nm is in agreement with the d value of (111) lattice planes of cubic phase CeO2 from high-magnification TEM image. Reaction conditions such as the concentration of precipitant, reaction temperature and ageing duration exert important influence on the purity and morphology of the product. Ce(OH)3 was detected when the reaction was processed at lower pH(＜9) or with ageing duration less than 8 h at 80 ℃. The size of polyhedral ceria nanoparticles increased with longer ageing time (＞15 h). If the reaction went on at a temperature lower than 40 ℃, a large quantity of rodlike Ce(OH)3 was produced according to TEM observation. Raman spectra of CeO2 nanocrystallines exhibit a Raman shift at 465 cm-1, corresponding to a F2g Raman band from the space group Fm3m of a cubic fluorite structure, while the Raman shift at about 600 cm-1 may be attributed to the second Raman vibration mode of O2- vacancy due to Ce3+ impurity. Photoluminescence spectrum of CeO2 shows an emission at 465 nm at room temperature, which may be explained by charge transition from the 4f band to the valence band of CeO2.
|
|
Received: 2008-11-28
Accepted: 2009-03-02
|
|
|
|
Corresponding Authors:
HAN Qiao-feng
E-mail: qiaofenghan@yahoo.com
|
|
[1] Murray E P, Tsai T, Barnett S A. Nature, 1999, 400: 649.
[2] Feng X D, Sayle D C, Wang Z L, et al. Science, 2006, 312: 1504.
[3] Chang H Y, Chen H I. J. Cryst. Growth, 2005, 283: 457.
[4] Wu N C, Shi E W, Zheng Y Q, et al. J. Am. Ceram. Soc., 2002, 85: 2462.
[5] SONG Xiao-lan, WANG Hai-bo，WU Xue-lan(宋晓岚, 王海波, 吴雪兰, 等). 稀土(Rare Earth)，2004, 25(3): 55.
[6] Fu X Q, Wang C, Yu H X, et al. Nanotechnology, 2007, 18: 145503.
[7] Tang C C, Bando Y, Liu B D, et al. Adv. Mater., 2005, 17: 3005.
[8] Zhou X D, Huebner W, Anderson H U. Chem. Mater., 2003, 15: 378.
[9] Zhou X D, Huebner W, Anderson H U. Appl. Phys. Lett., 2002, 80: 3814.
[10] Scholes F H, Hughes A E, Hardin S G, et al. Chem. Mater., 2007, 19: 2321.
[11] Wang Z L, Feng X D. J. Phys. Chem. B, 2003, 107: 13563.
[12] McBride J R, Hass K C, Poindexter B D, et al. J. Appl. Phys., 1994, 76: 2435.
[13] FU Shi-liu, DAI Jun, DING Qiu-ke, et al(符史流, 戴 军, 丁球科, 等). Acta Physica Sinica(物理学报)，2005, 54: 2369.
[14] GAO Fei，LI Guo-hua, ZHANG Jian-hui, et al(高 斐, 李国华，张建辉, 等). Chinese Physics Letters(中国物理快报), 2001, 18: 443.
[15] Djuricic B, Pickering S. J. Eur. Ceram. Soc., 1999, 19: 1925. |
| [1] |
LU Ya-nan1, WANG Xiao-xia1,2, MA Li-tong1,2*. Effects of Liquid Acid on the Spectral Characteristics During Peat Humic Acid Extracted by Alkali-Extraction Acid-Precipitation Method[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 40(02): 574-578. |
| [2] |
DONG Li-chao1, WANG Xiao-xia1, MA Li-tong1,2*, WANG Ya-xiong1,3*. Effects of Lignite Addition on the Spectral Characteristics of Dissolved Organic Matter During Fermentation of Sheep Manure Organic Fertilizer[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2019, 39(11): 3579-3584. |
| [3] |
WU Wen1, XUAN Ya-wen2, XIAO Li-na1, YANG Zhi-guang1, ZHU Can-can1, XIE Jian-ping1* . Synthesis and Fluorescence Properties of Rare Earth Ions Co-Doped CaMoO4 [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(01): 32-36. |
| [4] |
WEI Xiao-feng1,2, LI Da-lin1, XIAO Yi-hong1, CAI Guo-hui1, DAI Wu1, XIE Zeng-hong2*, WEI Ke-mei1. Synthesis of La-Co-O Mixed Oxides via Polyethylene Glycol-Assisted Co-Precipitation Method for Total Oxidation of Benzene[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(09): 3062-3067. |
| [5] |
ZHANG Wen-rui1, TANG Ai-dong2, XUE Jian-liang1 . Preparation of Cr-MnOx/Cordierite and Their Properties for Catalytic Oxidation of 1,2-Dichlorobenzene[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(09): 3075-3082. |
| [6] |
XU Bin, ZHOU Yong-qiang*, WANG He, CAO Li-li . Upconversion Luminescence of Er3+-Doped Yttrium-Stabilized Zirconia Powders [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(12): 3214-3217. |
| [7] |
LU Hong-bo, LIU Xiao-lin*, GU Mu, NI Chen, HUANG Shi-ming, LIU Bo . Photoluminescence of In-Doped Zinc Oxide Nanopowders Synthesized by Precipitation Method [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(03): 625-629. |
| [8] |
WU Wen1, 2, YIN Jiang-long1, XUAN Ya-wen1*, ZHANG Xin-lei2, LIU Chun-xia1, WANG Zhen-ling2 . Synthesis and Fluorescence Properties of SrZn(WO4)2∶Tb3+, Ce3+ Phosphors [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(01): 43-46. |
| [9] |
YAO Li-li, LUO Li*, DONG Guo-shuai，WANG Yin-hai . Crystal Structure and Upconversion Emission of Yb3+/Er3+-Co-Doped NaYF4 Nanocrystals [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(11): 2917-2920. |
| [10] |
ZHANG Chun-mei, YAO Feng-lan, QI Lei, WU Qiu-fang, WANG Si-si, MENG Tao* . Effect of Polyethyleneimine on the Morphology of ZnO Nanorod Arrays [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(10): 2762-2765. |
| [11] |
DING Jie1，2, YUE Shi-juan2，3, LIU Cui-ge3, WEI Yong-ju3, MENG Tao4, JIANG Han-jie5, SHI Yong-zheng4, XU Yi-zhuang2*, YU Jiang1*, WU Jin-guang2. Synthesis and Characterization of Mixed Metal Oxide Pigments[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(03): 723-728. |
| [12] |
HUANG Fang-ying, LUO Li*, DAI Qiang-qin. Crystal Structure and Photoluminescence Studies of ZnO Nanocrystals Doped with Eu3+ Ions[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(11): 2978-2980. |
| [13] |
WANG Xiao-chun, REN Bo, GUO Chang-xin, JIANG Gui-cheng, YIN Min* . Preparation of Y2O3∶Er3+ by Coprecipitation Method and Influence of Initial pH on the Luminescent Properties [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(03): 612-616. |
| [14] |
WANG Meng, MI Cong-cong, WANG Shan, LI Feng, LIU Jin-ling, XU Shu-kun* . Synthesis and Characterization of NaYF4∶Yb, Er Upconversion Fluorescent Nanoparticles via a Co-Precipitation Method [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(12): 3327-3331. |
| [15] |
XI Bei-dou1, 2, HE Xiao-song1, ZHAO Yue1, WEI Dan3, WEI Zi-min1*, JIANG Yong-hai2, LI Ming-xiao1, YANG Tian-xue1. Spectroscopic Characterization Indicator of Landfill in the Process of Stabilizing[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(09): 2475-2479. |
|
|
|
|
