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1、物理化学学报(WuliHuaxueXuebao)MayActaPhys.鄄Chim.Sin.,2010,26(5)：1343-13481343[Article]www.whxb.pku.edu.cnZn2SnO4纳米材料制备及光致发光特性*赵传熙吴萍张丹莉陈荣池凌飞肖潭(汕头大学物理系,广东汕头515063)摘要：以ZnO、SnO2和活性炭的混合物为原料,通过碳热还原热蒸发法无催化剂成功制备出Zn2SnO4纳米材料.借助X射线衍射仪(XRD)、拉曼光谱和扫描电子显微镜(SEM)对样品物相和形貌进行了表征,结果显示样品为面心立方结构的Zn2SnO4纳米链状棒,同时含有少量的ZnO
2、物相.利用X射线光电子能谱(XPS)对Zn2SnO4样品表面各元素的化学状态及相互作用方式进行了测试,结果表明:样品中Zn和Sn分别是以+2价和+4价氧化态形式存在,其中Zn2p电子有两个结合能,分别来自ZnO和ZnSnO,ZnSnO中Sn4+占据不同的格点位置.3/22424室温下光致发光谱(PL)结果显示,样品在紫外区域(320-450nm)和可见区域存在很强的发光带,其中紫外区域的宽发光带,经过高斯拟合可分为358和385nm两个发光峰,与同条件下制备得到的纯ZnO纳米材料发光谱比较,确认358nm发光峰是来自于Zn2SnO4的近带边复合发光.关键词：光致发光;Zn2Sn
3、O4纳米材料;碳热还原热蒸发法;X射线光电子能谱中图分类号：O649SynthesisandPhotoluminescenceofZn2SnO4Nanomaterials*ZHAOChuan鄄XiWUPingZHANGDan鄄LiCHENRongCHILing鄄FeiXIAOTan(DepartmentofPhysics,ShantouUniversity,Shantou515063,GuangdongProvince,P.R.China)Abstract：WesynthesizedZn2SnO4nanomaterialsbythecarbon鄄thermalevaporati
4、onmethodwithZn,SnO2andCpowdermixture,withoutusingacatalyst,toinvestigatethecontrollablesynthesisofZn2SnO4nanomaterialsandtostudytheiropticalpropertiesintheultravioletregion.Thestructure,andmorphologyoftheas鄄grownproductswerecharacterizedbyX鄄raydiffraction(XRD),Ramanspectroscopy,andscanningel
5、ectronmicroscopy(SEM).X鄄rayphotoelectronspectroscopy(XPS)wasalsousedtostudythetypeofbindingoftheelementsontotheproductsurfaces.Resultsshowthatzincandtinareinthe+2and+4oxidationstates,respectively.WedetectedtwodifferentZn2p3/2bindingenergiesandattributedthesetoZnOandZnSnO.Thetwobindingenergie
6、sofSn3drevealedthatSn4+24occupiestwodistinctsitesinZn2SnO4.Ourmeasuredphotoluminescencespectrum(PL)atroomtemperatureconsistsofabroademissionintheultravioletregion(320-450nm)andastrongemissioninthevisibleregion.Theasymmetricultravioletemissionbandcanbedividedintotwoemissionbands(358and385nm).
7、ComparedwiththePLspectrumofpureZnO,thebandcenteredat358nmisassignedtothenear鄄band鄄emissionofZn2SnO4.KeyWords：Photoluminescence;Zn2SnO4nanomaterial;Carbon鄄thermalevaporationmethod;X鄄rayphotoelectronspectroscopy一维半导体氧化物纳米材料,由于其独特的电巨大的应用潜力.目前大部分研究主要集中
