傅里叶变换红外光谱
分析化学(期刊)
光致发光
材料科学
荧光
X射线光电子能谱
热重分析
光谱学
差示扫描量热法
化学
化学工程
光学
光电子学
有机化学
物理
量子力学
工程类
热力学
作者
Panpan Zhu,Zhen Cheng,Lingling Du,Qian Chen,Kejun Tan
出处
期刊:Langmuir
[American Chemical Society]
日期:2018-07-29
卷期号:34 (34): 9982-9989
被引量:49
标识
DOI:10.1021/acs.langmuir.8b01230
摘要
New Cu-doped dual-emission carbon dots (D-CDs) were synthesized rapidly and simply via a one-pot solvothermal method, and its special photoluminescence mechanism was studied. D-CDs have two fluorescence (FL) emission peaks under one-wavelength excitation and can be used as dual-signal sensor which is usually designed with two or more substances. The prepared CDs show excellent water solubility, photostability, salt tolerance, oxidation resistance, and special optical properties. The raw material ratio, solvent, pH, time, and synthesis temperature were optimized. The characterizations of CDs including transmission electron microscopy, X-ray photoelectron spectroscopy, inductively coupled plasma spectroscopic analysis, X-ray diffraction assignation of phases, thermogravimetric analysis and differential scanning calorimetry, Fourier transform infrared (FTIR) spectroscopy, FL spectrum, and ultraviolet-visible spectrum (UV-vis) were conducted. The investigation on mechanism indicates that the unique dual-emissive property is mainly caused by the energy-level gaps generated by the surface defects of CDs. The prepared D-CDs have good potential in dual-signal analysis and visualization sensing. To demonstrate the practical application, ferric ions, vitamin A acetate, and pH have been determined successfully.
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