文章基本信息

标题：Role of alkali metal hydroxide in controlling the size of ZnO nanoparticles in non-aqueous medium
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作者：Singh J ; Mittu B ; Chauhan A 等
期刊名称：International Journal of Fundamental and Applied Sciences
印刷版ISSN：2278-1404
出版年度：2012
卷号：1
期号：4
页码：91-93
出版社：BioMedAsia
摘要：The alkali metal hydroxides play an important role in controlling the size of ZnO nanoparticle in alcoholic medium. METHODOLOGY: ZnO nanoparticles have been synthesized in alkali metal hydroxides (LiOH, NaOH and KOH). Characterization was carried-out using TEM, XRD, UV -Visible and Fluorescence Spectroscopy. RESULTS & CONCLUSION: TEM images showed the mono-disperse and nearly spherical shaped nanoparticles of size from 6.92 to 7.96 to 9.27 nm in LiOH, NaOH & KOH, respectively. XRD results presented that all the three have hexagonal wurtzite structure. UV absorption depicted the Bathochromic shift from 360 nm (LiOH), 362 nm (NaOH) to 375 nm (KOH). Red emission shift occurs in fluorescence spectra from 510 nm to 550 nm in the order of alkali metal hydroxide. The stud y reveals the mechanisms guiding the tunable crystal size and morphology .
关键词：Surface Charge Density; Bathochromic shift; Nanoparticle