Morphology-controllable synthesis and characterization of CeO_2 nanocrystals

查看全文 作　　者：Yangfeng Huang Yebin Cai Dongkai Qiao Hao [1]Liu

机构地区：[1]School of Mechanical & Electrical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China

出　　处：《Particuology》索引2011年第9卷第2期,共4页

摘　　要：CeO 2 nanocrystals with different morphologies were synthesized by adjusting the pH value of the starting solution in water-in-oil microemulsion.The obtained samples were characterized by transmission electron microscopy (TEM),X-ray diffraction (XRD),thermogravimetric analysis and different thermal analysis (TGA/DTA),Brunauer-Emmet-Teller (BET) surface area measurement,ultraviolet-visible absorption (UV-vis) spectroscopy and photoluminescence (PL) spectroscopy.Results show that the morphologies of CeO 2 were transformed from granular to spherical and to rod-like while the pH of the starting solution varied from 5 to 8 and to 11.All samples were indexed to the phase of CeO 2 and Ce(OH) 4,and the molar ratio of CeO 2 to Ce(OH) 4 was deduced to be about 0.25.The morphologies of CeO 2 nanocrystals had but slight influence on their specific surface areas,UV-vis spectra and PL spectra.The band gap energies of different morphological samples were estimated by UV-vis spectroscopic method. 关键词：氧化铈纳米晶 CEO2 形貌表征合成紫外可见光谱法透射电子显微镜可控

相关文献

参考文献（17）
引证文献（3）
耦合文献（2）

参考文献(17)

引证文献(3)

耦合文献(2)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Morphology-controllable synthesis and characterization of CeO_2 nanocrystals

参考文献(17)

引证文献(3)

耦合文献(2)

用户提示