中国粉体技术2011，Vol.17Issue(4)：25-28,4.DOI:10.3969/j.issn.1008-5548.2011.04.007
溶胶-凝胶燃烧法制备La2O3和La(OH)3纳米晶的研究
Preparation of La2O3 and La(OH)3 Nano-cryatalline by Sol-Gel Combustion Synthesis
摘要
Abstract
La(OH)3 nano-particles were synthesized by sol-gel combustion synthesis that citric acid monohydrate was used as the complexing agent and La(NO3)j-6H2O was used as the lanthanum source, the mixture that mole ratio of citric acid and La (NO,), was 1-1.2:1 were dissolved in the water, and ammonia solution was added to adjust pH value between 2~4. Then the wet gel was obtained and subsequently heated to cause the self-propagating combustion at 700-750 X for 1~2 h. The fluffy LaA nano-crystalline was synthesized. The structure and pattern of the as-prepared powders were characterized by XRD and TEM. The results showed that LaA nano-crystalline particles with grain diameter in range from 30 run to 100 run were prepared and the size was controlled. LajOj nano-crystalline was unstable to deliquesce with the moisture in the air and finally form La(OH)j. So pure La (OH)} nano-crystalline was prepared by way of controlling moisture.关键词
溶胶-凝胶燃烧法/纳米晶/自蔓延燃烧Key words
sol-gel combustion synthesis/ nano-crystallinejself-propaga ting combustion分类
化学化工引用本文复制引用
曾莉瑛,张海瑞,储刚..溶胶-凝胶燃烧法制备La2O3和La(OH)3纳米晶的研究[J].中国粉体技术,2011,17(4):25-28,4.基金项目
国家自然科学基金项目,编号:20903054 （）
辽宁省教育厅科研项目,编号:L2010241. （）
