采用低温电化学阳极剥离黑磷的方法,剥离1h制备出黑磷量子点,并研究了其稳定性,最终提出剥离机理。采用透射电镜、拉曼光谱、X射线光电子能谱等测试方法对黑磷量子点的微观形貌、晶体结构、光学性质和稳定性等进行表征。结果表明,黑磷量子点的平均直径为6.4±1.5 nm,尺寸较小;材料不含有其他杂质,纯度较高;其氧化程度很低,暴露于空气中仍具有良好的稳定性。此外,该方法耗时短且绿色环保,有利于促进纳米黑磷的制备及应用。
The black phosphorous quantum dots(QDs) have attracted significant interest as fascinating nanomaterials for potential applications in catalysis,optoelectronics,and sensing.The key step therefore towards application of black phosphorous QDs is the efficient preparation.The method was reported for the first time,which the black phosphorus QDs were prepared by low-temperature electrochemical anodic exfoliation of black phosphorus.After exfoliation for 1 h,the QDs were prepared,and its stability was studied.Finally,the preparation mechanism was proposed.Transmission electron microscopy,raman spectra,X-ray photoelectron spectroscopy and other test methods were employed to characterize the microscopic morphology,crystal structure,optical properties and stability of the QDs.The results shown that the average diameter of the QDs was 6.4±1.5nm,indicating the size was small.The material did not contain other impurities,explaining its purity was high.The QDs had low degree of oxidation,which exposed to the air still had good stability.In addition,the method took short time and was environmental friendly,which was beneficial to the preparation and application of nano-black phosphorus.
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基金资助
国家自然科学基金(21968012);云南省自然科学基金(2019FB012);国家级大学生创新创业训练项目(202010674035)
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