Template Synthesis and Luminescence Properties of CePO4:Tb Nanotubes
Template Synthesis and Luminescence Properties of CePO4:Tb Nanotubes
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DOI：
10.1021/jp8063432
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发表时间：
2008-12
影响因子：
3.7
通讯作者：
Guozhu Chen;Sixiu Sun;Wei Zhao;Shuling Xu;T. You
中科院分区：
文献类型：
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作者：
Guozhu Chen;Sixiu Sun;Wei Zhao;Shuling Xu;T. You
本文以Ce(OH)CO3：Tb纳米棒为模板剂，采用溶剂热法合成了CePO4：Tb纳米管。CePO_4：Tb纳米管的形成经历了在乙醇-−-水混合溶剂中发生固-−液界面化学反应和酸处理去除未反应的Ce(OH)CO_3：Tb牺牲模板的过程。研究发现，乙醇与水的体积比对最终产物的形貌有一定影响。透射电子显微镜和扫描电子显微镜照片表明，所制备的纳米管由纳米颗粒/纳米棒组成，保持了Ce(OH)CO3：Tb的基本形态。此外，X射线衍射图还显示了生长过程中的物相演变。系统地研究了Ce4+/Ce3+氧化还原对的光致发光性质，表明所制备的样品可以作为氧化还原开关，可以作为生物标记和探针。
In this paper, we report the synthesis of CePO4:Tb nanotubes by a solvothermal method using Ce(OH)CO3:Tb nanorods as both the physical and chemical templates. The formation of CePO4:Tb nanotubes involved a process of a solid−liquid interface chemical reaction in ethanol−water mixed solvent and a subsequent removal of unreacted Ce(OH)CO3:Tb sacrificial templates by acid treatment. It was found that the volume ratio between ethanol and water has some effect on the morphology of the final products. TEM and SEM images showed that the as-prepared nanotubes consist of nanoparticles/nanorods that preserve the basic morphology of the initial Ce(OH)CO3:Tb precursors. Furthermore, XRD patterns demonstrated phase evolution during the growth process. The photoluminescence properties were studied systematically, indicating that the as-prepared samples can serve as redox switches based on the reversible switching of the Ce4+/Ce3+ redox couple, which may be used as a biological label and probe.