采用超声模板法结合共沸蒸馏和水热法处理前驱体成功制备出了纳米CeO_2颗粒,通过TEM、XRD、FT-IR、UV-Vis等分析方法对产物形貌、结构和性能进行了表征;研究了模板剂的性质、模板剂的用量、共沸蒸馏和水热处理对纳米CeO_2颗粒形态、尺寸的影响.实验结果表明,与OP-10和SDBS比较,CTAB最适合应用于制备纳米CeO_2颗粒.当模板剂用量为n(CTAB)∶n(Ce(NO_3)_3·6H_2O)=1∶2,制备出粒径约为6.1nm的球形纳米CeO_2;共沸蒸馏能有效去除前驱体中的模板剂和吸附水,丁氧基的取代吸附及其空间位阻作用有利于制得分散性好、粒度分布均匀、粒径约为1.5～2.2nm的纳米CeO_2颗粒;水热处理改善了纳米CeO_2颗粒的晶化度,避免了高温焙烧过程时硬团聚体的生成,颗粒尺寸为2.5～3.8nm;纳米CeO_2颗粒具有良好的可见光透过和优异的紫外光吸收性能.
CeO_2 nanoparticles were successfully synthesized by ultrasonic template method combining with precursor treatment of butanol azeotropic distillation and hydrothermal method,respectively.The morphologies,structure and properties of the nanoparticles were characterized by TEM,XRD,FT-IR,UV-Vis,etc.The effects of the property of template,the amounts of template,azeotropic distillation and hydrothermal method on the grain morphology and size were investigated.The results showed that CTAB (cationic surfactant) was the best choice for the template,comparing with OP-10 and SDBS.Spherical CeO_2 nanoparticles (ca.6.1nm) were prepared when the molar ratios between CTAB and Ce(NO_3)_3·6H_2O was 1∶2;The azeotropic distillation effectively reduced the template and absorption water,The replace absorption and steric effects of butoxy conducive to synthesize nanoparticles with good dispersion,uniform particle size(ca.1.5-2.2nm).hydrothermal method improved the crystall-ization degree of the nanoparticles,avoiding the formation of hard agglomerates during the high temperature calcinations,the particle size was about 2.5-3.8nm;CeO_2 nanoparticles have high transparency in visible light and excellent UV-shielding property.
参考文献
| [1] | Zhang Yawen;Si Rui;Liao Chunsheng et al.[J].Journal of Physical Chemistry B,2003,107(37):10159-10167. |
| [2] | Feng Xiaodong;Sayle Dean C;Wang Zhonglin et al.[J].Science,2006,312(09):1504-1508. |
| [3] | Jaya P. Nair;ElleN Wachtel;Igor Lubomirsky;Juergen Fleig;Joachim Matier .Anomalous Expansion of CeO_2 Nanocrystalline Membranes[J].Advanced Materials,2003(24):2077-2081. |
| [4] | Jasinski P.;Suzuki T.;Anderson HU. .Nanocrystalline undoped ceria oxygen sensor[J].Sensors and Actuators, B. Chemical,2003(1/3):73-77. |
| [5] | Chunwen Sun;Hong Li;ZhaoXiang Wang;Liquan Chen;Xuejie Huang .Synthesis and Characterization of Polycrystalline CeO_2 Nanowires[J].Chemistry Letters,2004(6):662-663. |
| [6] | 邱冠周,宋晓岚,曲鹏,杨振华,吴雪兰,王海波.影响纳米CeO2沉淀法合成的工艺因素研究[J].中国稀土学报,2005(03):321-327. |
| [7] | Akio M;Hiromichi S;Qiu Jianbei .[J].Journal of Non-Crystalline Solids,2004,349:355-359. |
| [8] | Zhou Fu;Zhao Xuemei;Xu Hai et al.[J].Journal of Physical Chemistry C,2007,111:1651-1657. |
| [9] | Yabe Shinryo;Momose Shigeoshi;Yamashita Mika et al.[J].Rare Earths,1999,34:124-125. |
| [10] | 范方强,余林,孙明,刁贵强,缪飞.反相单微乳液法制备纳米二氧化铈及其形貌和分散性研究[J].无机盐工业,2009(03):22-24,62. |
| [11] | 沈国柱,徐政.超声化学法在纳米材料制备中的应用[J].材料导报,2004(z1):12-14,18. |
| [12] | Yin Lunxiang;Wang Yanqin;Pang Guangsheng et al.[J].Journal of Colloid and Interface Science,2002,246:78-84. |
| [13] | Huang Weiping;Tang Xianghai;Wang Yanqin.[J].Chemical Communications,2000:1415-1416. |
| [14] | 宋晓岚,曲鹏,何希,杨海平,邱冠周.ZnO掺杂纳米CeO2的共沸蒸馏法合成[J].稀有金属材料与工程,2006(z2):303-308. |
| [15] | Zaki M I;Hussein G A M;Mansour S A A et al.[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,1997,127(1-3):47-56. |
| [16] | Survase D V;Gupta M;Asthana S N .[J].Progress in Crystal Growth and Characterization of Materials,2002,45(1-2):161-165. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%