Synthesis and photocatalytic activity of hierarchical flower-like SrTiO_3 nanostructure  

钛酸锶花状分级纳米结构的合成与光催化性质研究（英文）

作　　者：赖小勇 王呈睿 金泉 于然波 王丹 

机构地区：[1]State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences [2]Department of Physical Chemistry,University of Science and Technology Beijing

出　　处：《Science China Materials》2015年第3期192-197,共6页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(21031005,20971125,21006116,20871015,51072020 and 21050110428);National Science Fund for Distinguished Young Scholars(21325105)

摘　　要：A hierarchical flower-like Sr Ti O3 nanostructure was synthesized by a simple and direct hydrothermal method.The products were characterized by X-ray diffraction,scanning electron microscopy,and transmission electron microscopy.Structure characterizations suggest that the as-synthesized SrT iO 3 crystal has eight symmetric branches growing along the ?111? direction and each branch has many ordered small laminae,forming a well-defined flower-like structure.By adjusting the pH value of the reaction system,the morphology could be changed continuously from flower-like structure to cube,then to sphere.The hierarchical flower-like SrT iO 3 nanostructure exhibits a higher photocatalytic activity for degrading Rhodamine B than its cubic and spherical counterparts.本文报道了一种钛酸锶花状分级纳米结构.实验结果表明该钛酸锶花状分级纳米结构沿钛酸锶晶体的?111?方向生长,形成八个分支结构,每个分支结构由一系列纳米片堆叠而成,整个粒子具有花状的形貌结构.通过调节反应体系的p H,可以得到纳米立方、纳米球等其他形貌结构的钛酸锶晶体.所合成钛酸锶对光催化降解罗丹明B染料具有较高活性,其中花状分级纳米结构钛酸锶的光催化活性显著高于其他两种结构,在光催化领域具有潜在应用前景.

关 键 词：分级纳米结构 花状 钛酸锶 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O643.36[理学—物理化学]