| 高琪,朱小芹,翟良君.化学通报,2019,82(12):1093-1097. |
| 烷基胺为媒介的铜纳米棒的合成及其生长机制研究 |
| Alkylamine-mediated Synthesis and Growth?Mechanism of Copper Nanorods |
| 投稿时间：2019-06-09 修订日期：2019-09-23 |
| DOI： |
| 中文关键词: 铜纳米棒 液相还原法 五重孪晶 生长机制 |
| 英文关键词:Copper nanorod Hydrothermal synthesis method Five-fold twinned Growth mechanism |
| 基金项目:江苏省自然科学基金(BK20170309)；基于网络的PCI实践教学模式探索与研究（11611211727） |
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| 中文摘要: |
| 以氯化铜为前躯体，葡糖糖为还原剂，烷基胺(十六胺和十八胺的混合物)为络合剂和表面包覆剂，经过络合反应和溶剂热两步反应首先得到形貌均一、直径约为100 nm的铜纳米颗粒, 随后自发生长为五重孪晶铜纳米棒(仍含有部分颗粒)。实验过程中分别对溶剂热反应1 h、3 h和5 h后的还原产物的形貌特征加以表征，可以推断被还原的铜原子首先均匀成核形成初级铜纳米颗粒，经过奥斯特瓦尔德老化过程生长为五重孪晶的次级铜纳米颗粒，由于孪晶结构具有很高的生长活性，在烷基胺的表面包覆作用下生长为各项异性的铜纳米棒。该方法提供了一种有效的铜纳米棒的制备方法并且降低了一维铜纳米材料的合成成本。 |
| 英文摘要: |
| Uniform copper (Cu) nanoparticles were synthesized via two-step reaction: complexation reaction and solvothermal reaction by using copper?chloride as reaction precursor, glucose as reducing agent and alkylamine (mixture of hexadecylamine and octadecylamine) as complexing agents and surface capping agents. Subsequently, the Cu nanoparticles which were 100 nm in diameter spontaneously grew into Cu nanorods (including nanoparticles). The morphological characteristics of the reduction products after solvothermal reaction for 1 h, 3 h and 5 h were characterized respectively. It is deduced that the reduced Cu atoms first nucleated uniformly to form primary Cu nanoparticles, and then grew into five-fold twin secondary Cu nanoparticles through Ostwald aging process. Eventually, due to the high growth activity of the twin structure, anisotropy Cu nanorods were simply prepared under the surface coating of alkylamine. This strategy could provide an effective method for preparing copper nanorods and reduce the cost of synthesis of one-dimensional Cu nanomaterials. |
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