Facile synthesis and shape evolution of highly symmetric 26-facet polyhedral microcrystals of Cu2O
Facile synthesis and shape evolution of highly symmetric 26-facet polyhedral microcrystals of Cu2O
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DOI：
10.1039/b912034n
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发表时间：
2009-10
期刊：
影响因子：
3.1
通讯作者：
Weiwei Zhou;B. Yan;Chuanwei Cheng;C. Cong;Hailong Hu;H. Fan;T. Yu
中科院分区：
文献类型：
--
作者：
Weiwei Zhou;B. Yan;Chuanwei Cheng;C. Cong;Hailong Hu;H. Fan;T. Yu
在适当选择的反应介质中，成功地合成了具有发育良好的{100}、{110}、{111}晶面的新型高对称26面Cu2O多面体微晶体。这些多面体呈核壳结构。以CuCl2·2H2O、柠檬酸钠（C6H5Na3O7·2H2O）络合剂、葡萄糖还原剂、十二烷基硫酸钠（SDS）表面活性剂、NaOH和乙二醇（EG）为功能介质。通过改变EG与水体积比，可以直接得到多面体、准立方体、八面体微晶体。SDS、EG和C6H5Na3O7·2H2O是形成不同晶面的必要添加剂。基于时间相关实验，提出了种子颗粒聚集、定向附着、成熟过程和表面重构等可能的生长机制。研究了多面体微晶的光催化性能。
A novel type of high symmetric 26-facet polyhedral microcrystals of Cu2O with well-developed {100}, {110}, {111} crystallographic faces are successfully synthesized in a properly selected reaction medium. These polyhedra exhibit a core-shell structure. An aqueous solution containing CuCl2·2H2O, sodium citrate (C6H5Na3O7·2H2O) complexing agent, glucose reductant, sodium dodecyl sulfate (SDS) surfactant, NaOH, and ethylene glycol (EG) constitutes the functional medium. By altering the EG to the water volume ratio, polyhedral, quasi-cubic, octahedral microcrystals are obtained directly. SDS, EG and C6H5Na3O7·2H2O have been confirmed to be the necessary additives to the development of different crystallographic planes. A possible growth mechanism involving aggregation of seed particles, oriented attachment, ripening process and surface reconstruction is proposed on the grounds of time-dependent experiments. The photocatalytic properties of the polyhedral microcrystals are also investigated.