Te@Cross-Linked PVA Core-Shell Structures Synthesized by a One-Step Synergistic Soft-Hard Template Process

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• 作者：Hai-Sheng Qian ; Lin-Bao Luo ; Jun-Yan Gong ; Shu-Hong Yu ; Tan-Wei Li ; and Lin-feng Fei
• 刊名：Crystal Growth & Design
• 出版年：2006
• 出版时间：February 2006
• 年：2006
• 卷：6
• 期：2
• 页码：607 - 611
• 全文大小：461K
• 年卷期：v.6,no.2(February 2006)
• ISSN：1528-7505

文摘

Recently, we proposed a simple, large-scale hydrothermal synthesis of flexible nanocables with silver as cores andcross-linked poly(vinyl alcohol) (PVA) as shells in which silver ions catalyzed the cross-linking of PVA chains under hydrothermalconditions and a so-called synergistic soft-hard template mechanism (SSHM) was proposed (Luo et al. J. Am. Chem. Soc. 2005,127, 2822-2823). In this paper, we extend this approach to examine whether high valent metal ions such as Te⁴⁺ also can bereduced under a similar reaction but using sodium tellurite and PVA as precursors. The results demonstrated that different tellurium/cross-linked PVA core-shell nanostructures such as a core-shell structure with nanorod bundles penetrated through a ball, branchedcables, and separated cables can be synthesized. The influence of the concentration of PVA, reaction temperature, and reaction timeon the formation of different nanostructures has been investigated. In addition, the detailed reaction and shape evolution process ofcore-shell structures have also been studied. The results suggested that the cross-linking of PVA also can occur in the presence ofhigh valent metal ions besides noble metal ions, underlining that it is possible to access various core-shell structures with differentinorganic components as cores by this approach.