Hydrothermal growth of multi-facet anatase spheres

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• 作者：Jin-Ming Wu ; ^a ; ^{msewjm@zju.edu.cn} ; Xiao-Mei Song^a ; Lu-Yao Ma^a ; Xiao-Dan Wei^a
• 关键词：A1. Crystal structure ; A1. Nanostructures ; A2. Hydrothermal crystal growth ; B1. Nanomaterials
• 刊名：Journal of Crystal Growth
• 出版年：2011
• 出版时间：15 March 2011
• 年：2011
• 卷：319
• 期：1
• 页码：57-63
• 全文大小：1441 K

文摘

Titania with various nanostructures can be synthesized by several F⁻-mediated procedures. In this paper, we report the synthesis of a novel multi-facet microsphere consisting of etched single-crystalline anatase by simply immersing metallic Ti plates in an HF aqueous solution under hydrothermal conditions. The etched multi-facet sphere was found to grow through the nucleation and growth of truncated bipyramids on a previously precipitated one to assemble a microsphere, and its subsequent etching by HF to expose the thermodynamic stable {1 0 1} facets. The photocatalytic activity of such etched multi-facet sphere thin films was evaluated utilizing rhodamine B and sulfonic salicylic acid in water as target molecules and compared with commercial Degussa P25 titania nanoparticles.