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Synthesis and photocatalytic activity of hierarchical flower-like SrTiO3 nanostructure

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Abstract

A hierarchical flower-like SrTiO3 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 SrTiO3 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 SrTiO3 nanostructure exhibits a higher photocatalytic activity for degrading Rhodamine B than its cubic and spherical counterparts.

摘要

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, 形成八个分枝结构, 每个分枝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pH值, 可以得到纳米立方、 纳米球等其它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它两种结构, 在光催化领域具有潜在应用前景.

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Author information

Correspondence to Dan Wang.

Additional information

These authors contributed equally to this work.

Xiao-Yong Lai received his BSc (2004) and PhD (2009) from the Department of Materials and Science at Jilin University. Then, he moved to the Institute of Process Engineering, Chinese Academy of Science and joined Prof. Dan Wang’s group. Now he is an associate researcher at the State Key Laboratory Cultivation Base of Natural Gas Conversion, Ningxia University. His research interests focus on the preparation of hollow and porous materials as well as their applications to photocatalysis, DSSCs and sensors.

Dan Wang received his BSc and MSc at Jilin University (1994 and 1997) and PhD at Yamanashi University (2001). In 2004, he was awarded the Hundred Talents Program of the Chinese Academy of Sciences and took his current position as a principal investigator at the State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences. His research interests include inorganic material chemistry, surface and colloidal chemistry, hydrothermal chemistry, sol-gel chemistry and self-assembly processes, with focus on the design and synthesis of micro-/nanostructured functional inorganic materials and their applications in energy conversion and storage, photocatalysis and sensors.

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Lai, X., Wang, C., Jin, Q. et al. Synthesis and photocatalytic activity of hierarchical flower-like SrTiO3 nanostructure. Sci. China Mater. 58, 192–197 (2015). https://doi.org/10.1007/s40843-015-0038-1

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Keywords

  • Photocatalytic Activity
  • Science China Material
  • Photocatalytic Degradation
  • Symmetric Branch
  • Irregular Nanoparticles