点击次数：

论文类型：期刊论文

发表时间：2013-01-01

发表刊物：INTERNATIONAL JOURNAL OF NANOTECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：10

期号：1-2

页面范围：22-29

ISSN号：1475-7435

关键字：cation exchange; Mg(x)Zn(1-x)Oalloy; band gap; UV-visible absorption

摘要：We developed a novel cation exchange method to prepare the alloyed semiconductors. A series of self- assembled magnesium doped zinc oxide (MgxZn1-xO) particles were synthesised by varying the molar ratios of Mg precursor Mg-5(CO3)(4)(OH)(2)center dot 4H(2)O to Zn precursor ZnAc2 center dot 4H(2)O from 1: 1 to 3: 1 at different cation exchange time. Powder X-ray Diffraction (XRD) indicates that the samples are a mixture of hexagonal and cubic phases. The UV-visible (UV-vis) absorption spectra show that the band gap of MgxZn1-xO particles can be readily tuned by optimising the cation exchange time and the molar ratio of precursors. The morphology of MgxZn1-xO particles was observed by Scanning Electron Microscopy (SEM).