期刊
JOURNAL OF CHEMICAL SCIENCES
卷 128, 期 7, 页码 1119-1130出版社
INDIAN ACAD SCIENCES
DOI: 10.1007/s12039-016-1104-2
关键词
Urea hydrolysis; amorphous citrate method; combustion synthesis; beta-nitro alcohols; 2-amino 2-chromenes
资金
- Board of Research in Nuclear Sciences (BRNS), Mumbai
Zirconia nanoparticles were synthesized by precipitation, urea hydrolysis, amorphous citrate and combustion synthesis methods. The zirconia surface was subsequently modified by grafting Ba2+ species. The Ba2+ modified zirconia (Ba/ZrO2) materials were characterized using XRD, Fourier analysis, UV-vis-DRS, FESEM and HRTEM techniques. XRD study indicated selective stabilization of the tetragonal phase of zirconia in the presence of Ba2+ species. Fourier line profile analysis of the XRD peaks revealed that the average crystallite size of the zirconia nanoparticles is in the range of 5-15 nm. The surface area, basicity and barium content of the material depend strongly on the method of synthesis. The Ba/ZrO2 catalyst prepared by urea hydrolysis method exhibited higher surface area and barium content compared to other samples. The catalytic activity of the Ba/ZrO2 catalyst was evaluated for synthesis of beta-nitro alcohols and 2-amino 2-chromenes. The beta-nitro alcohols were synthesized by condensation of aryl aldehydes and nitromethane. Similarly, the 2-amino 2-chromenes were synthesized by condensation of arylaldehydes, alpha-naphthol and malononitrile. The Ba/ZrO2 catalyst was found to be highly efficient for synthesis of both classes of compounds providing excellent yield and purity of the products.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据