高分辨率透射电子显微镜
纳米材料
材料科学
双功能
循环伏安法
碳纤维
衍射仪
纳米技术
化学工程
傅里叶变换红外光谱
超顺磁性
透射电子显微镜
催化作用
电化学
复合数
化学
扫描电子显微镜
有机化学
电极
磁化
物理化学
复合材料
工程类
物理
磁场
量子力学
作者
Xiaoqi Gao,Lei Wang,Chao Sun,Nan Zhou
出处
期刊:Molecules
[MDPI AG]
日期:2022-03-04
卷期号:27 (5): 1690-1690
被引量:12
标识
DOI:10.3390/molecules27051690
摘要
Here, based on self-assembly of carbon quantum dots (CDs), an innovative method to prepare nanomaterials under the action of a metal catalyst was presented. CDs were synthesized by a one-step hydrothermal method with citric acid (CA) as the carbon source, ethylenediamine (EDA) as the passivator and FeSO4•7H2O as the pre-catalyst. In the experiment, it was found that the nano-carbon films with a graphene-like structure were formed on the surface of the solution. The structure of the films was studied by high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared (FT-IR), etc. The results demonstrated that the films were formed by the self-assembly of CDs under the action of the gas-liquid interface template and the metal catalyst. Meanwhile, the electrochemical performance of the films was evaluated by linear cyclic voltammetry (CV) and galvanostatic charge discharge (GOD) tests. In addition, the bulk solution could be further reacted and self-assembled by reflux to form a bifunctional magnetic-fluorescent composite material. Characterizations such as X-ray diffractometer (XRD), fluorescence spectra (FL), vibrating sample magnetometer (VSM), etc. revealed that it was a composite of superparamagnetic γ-Fe2O3 and CDs. The results showed that self-assembly of CDs is a novel and effective method for preparing new carbon nanomaterials.
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