Template-free hydrothermal synthesis of single-crystalline SnO2 nanocauliflowers and their optical p

来源 :稀有金属(英文版) | 被引量 : 0次 | 上传用户:jg1983
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Large-scale single-crystalline SnOznanocauliflowers were successfully synthesized using a hydrothermal growth method without any tem-plate. The samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), en-ergy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and selected area electron diffraction (SAED).FE-SEM images show that the as-grown SnO2 nanocauliflowers are constructed of tetragonal prisms with a width of 500-600 nm. XRD,EDS, and SAED results indicate that the as-grown SnO2 nanocauliflowers are single crystalline with the tetragonal ruffle crystalline structure.The growth mechanism of SnO2 nanocauliflowers is also preliminarily discussed on the basis of different Sn(OH)2-6 concentrations, and it is found that Sn(OH)2-6 concentration plays an important role in determining the shape of the prepared SnO2. Room temperature photolu-minescence was further carried out on SnO2 nanocaulifiowers to investigate their optical properties. An intense blue luminescence centered at a wavelength of 424 nm is observed in the as-grown SnO2 nanocauliflowers.
其他文献
以Cu,In,Se为原料制备了高纯CuInSe2块体材料.分别采用熔盐净化-电解-区域熔炼工艺和真空蒸馏-区域熔炼联合工艺对原料In,Se进行提纯,可获得纯度99.9999%In和99.9995%Se.采用
在实践中经常要根据心率去校正Q-T间期,从而得出“校正Q-T”(Q-T指数或K值)。一般采用Bazett于1920年设计的通过R-R间期来进行校正Q-T的计算(校正Q-T=实测Q-T/(R-R)~(1/2))
绵竹年画源远流长,是中国四大年画之一,也是中国非物质文化遗产。随着非物质文化遗产热的兴起,特别是2008年汶川大地震后,绵竹年画发展较快,但仍然存在着一些不足。本文通过
A Eu3+-doped CaCO3 phosphor with red emission was prepared by microwave synthesis. The scanning electron microscopy (SEM) image and laser particle size analysis
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
复合基带是一种高强、低磁并较易形成锐利立方织构的高性能织构金属基带,能够较好地满足制备高性能涂层导体用织构基带的要求.采用放电等离子烧结方法制备了Ni5W/Ni12W/Ni5W
利用溶胶-凝胶法制备了Mn掺杂和Mn,Li共掺ZnO室温铁磁性半导体,分别采用X射线衍射(XRD),X光电子能谱(XPS),紫外-可见分光光度计(UV-VIS)和振动样品磁强计(VSM)研究了添加Li微
急性白血病的FAB分类自1976年发表以来,因其方法简易实用,对疾病的治疗和预后有一定的价值,已被世界各国广为采用。但在实践中也发现一些问题,最主要的是在观察者之间难于达
不同盘播量机插秧对秧苗素质的影响至关重要。通过对新科稻21设置不同的盘播量处理,研究其对其秧苗素质和产量的影响,试验结果表明,播量为86 g/盘的处理产量最高,实际产量达6
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥