Kirkendall效应制备表面Cu2O富集的具有梯度结构的Cu2O-TiO2纳微球  

Preparation of Cu_2O surface-gathered hierarchical Cu_2O-TiO_2 nano-microspheres by Kirkendall effect

作　　者：田世伟[1] 李安宁[1] 孙红旗 周幸福[1] 金万勤[1] 

机构地区：[1]南京工业大学化学化工学院,材料化学工程国家重点实验室,江苏南京210009 [2]科廷科技大学化工学院,西澳大利亚州珀斯6845

出　　处：《南京工业大学学报（自然科学版）》2012年第3期45-50,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：教育部长江学者和创新团队发展计划资助项目(IRT0732)

摘　　要：以十二烷基磺酸钠(SDS)为自组装诱导剂,以CuO纳米线为前驱体和模板剂,制备了尺寸分别为30、300、1 500 nm的Cu2O-TiO2纳微球。采用X线多晶粉末衍射(XRD)、场发射扫描电子显微镜(FESEM)、透射电子显微镜(TEM)、N2吸附脱附等温线和紫外可见漫反射光谱对所制备试样的形貌和结构进行了表征。结果表明:制备的Cu2O-TiO2纳微球具有良好的结晶度以及明显的尺寸梯度分布,试样具有一定的可见光吸收。此外,由于Kirkendall效应的影响,Cu2O在纳微球表面的含量远大于球内含量。Hierarchical crystalline Cu2O-TiO2 nanospheres,shaped into 30,300,and 1 500 nm,were fabricated based on Kirkendall Effect using CuO nanowires as both precursor and template.Sodium dodecylsulfonate（SDS） was used to orient the hydrolysis product from tetrabutyl titanate to self-assembly of spherical configuration.The obtained samples were characterized by X-ray diffraction（XRD）,field emission scanning electron microscopy（FESEM）,transmission electron microscopy（TEM）,N2 adsorption-desorption analysis,and UV-vis diffuse reflectance absorption spectra（UV-vis DRS）.Results showed that the prepared sample was well crystallographic and had visible light respondent.The transfer of Cu element followed the Kirkendall effect in the formation process of Cu2O-TiO2 nanospheres.This work would provide insight into formation process of hierarchical architecture and sound understanding of crystalline composite growth.

关 键 词：二氧化钛 氧化亚铜 纳微球 自组装 

分 类 号：TB383[一般工业技术—材料科学与工程]