山竹壳基荧光碳量子点制备

摘要

By using the mangosteen shells as the raw material,the carbonized mangosteen shells with carbon content of more than 75％ and relatively complete carbon network structure was obtained by one-step carbonization method.The water-soluble CQDs with blue green fluorescence were prepared by carbonic acid-catalyzed oxidative cleavage from carbonized mangosteen shells.The average size of the carbon quantum dots was 2.7 nm.Fluorescence spectra demonstrated that CQDs have wavelength-dependent properties,which enable the multi-color fluorescence.FTIR spectra analysis showed that the surface of CQDs is rich in hydroxyl and carboxyl groups,which means the good water solubility and easy to modification.%以生物废弃物山竹壳为原料,通过一步碳化的方法获得碳质量分数75％以上,具有相对完整碳网结构的碳化山竹壳.再以碳化山竹壳为碳源,采用混酸氧化切割的方法,成功制备具有蓝绿色荧光的山竹壳基碳量子点,该碳量子点平均粒径为2.7 nm.荧光光谱分析证明其具有波长依赖的特性,可实现多色彩发光.红外图谱分析证明该CQDs表面富含羟基羧基,水溶性良好,易于修饰钝化.