Electrochemical synthesis of carbon nano onions
Electrochemical synthesis of carbon nano onions
复制标题
碳纳米洋葱的电化学合成
DOI：
10.1039/d0qi00950d
复制
发表时间：
2020-11-21
影响因子：
7
通讯作者：
Li, Meixian
中科院分区：
文献类型：
--
作者：
Bian, Yixuan;Liu, Lu;Li, Meixian
作为一类重要的碳纳米材料，碳纳米洋葱（hocs）由于其独特的结构和性质，近年来引起了人们的极大兴趣。本文以简单芳香族化合物为原料，乙腈为溶剂，在铂片电极上采用多电位阶跃法实现了空心碳纳米洋葱（H-hocs）和实心碳纳米洋葱（S-hocs）的电化学合成。铂片电极上的电解产物经加热处理、超声波和梯度离心分离得到H-hocs和S-hocs。反应机理推测为脱氢氧化和还原二聚反应以及交联反应。用扫描电镜、透射电镜和拉曼光谱对H-hocs和S-hocs进行了表征。这项工作为合成和分离硫代和氢代化合物提供了一种新的方法。所开发的方法不需要复杂的设备或高能耗。所获得的hocs将适用于构建电催化和传感界面。
As an important class of carbon nanomaterials, carbon nano onions (CNOs) have attracted considerable interest in recent years due to their unique structures and properties. In this work, the electrochemical synthesis of CNOs (including hollow carbon nano onions (H-CNOs) and solid carbon nano onions (S-CNOs)) was achieved from simple aromatic compounds in acetonitrile on a platinum plate electrode by a multi-potential steps method. The electrolytic products on the platinum plate electrode were separated to obtain H-CNOs and S-CNOs by heating treatment, followed by ultrasonic and gradient centrifugation. The reaction mechanism was presumed to be involved with dehydrogenation oxidation and reductive dimerization, as well as cross-linking reactions. The obtained H-CNOs and S-CNOs were characterized by scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. This work has provided a new approach to synthesize and separate S-CNOs and H-CNOs. The developed method does not require sophisticated equipment or high energy consumption. The obtained CNOs would be applicable to construct electrocatalysis and sensing interfaces.