通过不同温度下的溶胶化学法制备氧化锌纳米晶体及其表征

Production and characterization of ZnO nanocrystals obtained by solochemical processing at different temperatures.

作者信息

Gusatti Marivone, do Rosário Jeane de Almeida, de Campos Carlos Eduardo Maduro, Kunhen Nivaldo Cabral, de Carvalho Elita Urano, Riella Humberto Gracher, Bernardin Adriano Michael

机构信息

Programa de Pós-Graduação em Engenharia Química, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, Florianópolis, Santa Catarina, 88040-900, Brazil.

出版信息

J Nanosci Nanotechnol. 2010 Jul;10(7):4348-51. doi: 10.1166/jnn.2010.2198.

DOI:10.1166/jnn.2010.2198

PMID:21128423

Abstract

The semiconductor zinc oxide (ZnO) has been widely used because it presents exclusive novel physical and chemical properties at the nanometer scale. In this work, ZnO nanocrystals were synthesized via solochemical processing in a few hours without any subsequent treatment. ZnCl2 and NaOH were adopted as synthesis precursors. ZnO production was realized at different reaction temperatures to verify the effect of this parameter on synthesis. The synthesis temperatures studied were 50 degrees C, 70 degrees C and 90 degrees C. The materials obtained at different reaction temperatures were characterized by X-ray diffraction (XRD) and the Rietveld method. The size and morphology of the ZnO particles obtained at 50 degrees C were evaluated by transmission electron microscopy (TEM). ZnO powders have hexagonal wurtzite structure and nanometric-sized crystallites. Microstrain increased and the average crystallite size decreased with the increase in reaction temperature.

摘要

半导体氧化锌（ZnO）因其在纳米尺度上呈现出独特的新颖物理和化学性质而被广泛应用。在本工作中，通过溶胶化学法在数小时内合成了ZnO纳米晶体，无需任何后续处理。采用ZnCl₂和NaOH作为合成前驱体。在不同反应温度下实现了ZnO的制备，以验证该参数对合成的影响。所研究的合成温度为50℃、70℃和90℃。通过X射线衍射（XRD）和Rietveld方法对在不同反应温度下获得的材料进行了表征。通过透射电子显微镜（TEM）对在50℃下获得的ZnO颗粒的尺寸和形貌进行了评估。ZnO粉末具有六方纤锌矿结构和纳米尺寸的微晶。随着反应温度的升高，微观应变增加，平均微晶尺寸减小。