以甘蔗渣为基质制备碳量子点,先将甘蔗渣高温碳化得到黑色固体,再利用化学氧化法制备碳量子点。通过高分辨率透射电子显微镜、傅里叶变换红外光谱仪、荧光光谱仪以及紫外-可见分光光度计对制备的碳量子点的形貌、表面官能团及荧光特征进行了表征。结果表明:碳量子点颗粒直径在10～20nm之间,晶格为0.30nm;碳量子点表面含有一定量的羟基等含氧基团;在激发波长300nm处有较强的荧光发射峰。通过检测不同储存时间的碳量子点的荧光强度发现,储存120d碳量子点荧光强度仍能保持80.07%。
Bagasse was used as substrate to prepared carbon quantum dots (CQDs).After high temperature carburization the black solids were obtained.Then carbon quantum dots were synthesized by chemical oxidation method.The carbon dots were confirmed by transmission electron microscope (TEM),fourier transform infrared spectroscopy (FT-IR),photoluminescence spectra (PL) and UV-visible spectroscopy (UV-Vis).The finding showed that CQDs had a uniform diameter 10～20nm,and crystal lattice was 0.30nm.There were some oxygen-containing functional groups on CQDs surface as hydroxyl groups.CQDs had fluorescent emission peak at 300nm.After stored at room temperature for 120 days,the fluorescence intensity of CQDs was still maintained 80.07%.
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基金资助
辽宁省教育厅高校基本科研项目,资源化利用甘蔗渣制备碳量子点的研究(JQL201715403)
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