非晶碳纳米颗粒的制备与表征

发布时间：2018-06-05 23:51

  本文选题：纳米颗粒 + 非晶态　； 参考：《兰州大学》2015年硕士论文

【摘要】：非晶碳纳米颗粒因具有良好的荧光性能、生物相容性及低毒性等特性,所以在生物成像、光催化、生物传感等方面有巨大的潜在应用前景。本论文探索了非晶碳纳米颗粒的制备、表征及其性质,具体内容如下：(1)以葡萄糖为原料,通过水热法,制备了颗粒尺寸较小、尺寸分布较窄、形貌近球形、分散的非晶碳纳米颗粒。通过EDS、FTIR、 Raman分析,可以得出样品的主要组成是C、O,且含有羧基、羟基等含氧官能团；通过XRD和SAED分析,得出样品为非晶态。由此可知,所制备的样品为非晶碳纳米颗粒；(2)通过TEM分析,可以得知制备得到样品为球形形貌且分散性较好；研究了制备非晶碳纳米颗粒的主要影响因素：反应温度、反应时间及葡萄糖溶液的浓度。随着反应温度的升高(160℃-190℃),制备出的非晶碳纳米颗粒尺寸减小,反应温度达到200℃时,样品出现晶化；随着反应时间的增长(3-5 h),制备出的非晶碳纳米颗粒尺寸减小,反应时间达到6h时,样品中出现尺寸较大的团聚体；随着葡萄糖溶液浓度的增大(0.05-0.15 mol/L),制备出的非晶碳纳米颗粒尺寸减小,葡萄糖溶液浓度达到0.2 mol/L时,样品中出现尺寸较大的团聚体。最后通过实验对比分析得出了最优实验条件：c(C6H12O6·H2O)为0.15mol/L、反应时间5 h、反应温度190℃；(3)通过UV-Vis分析,可以得到非晶碳纳米颗粒的电子结构与有机发光材料的电子结构更接近。
[Abstract]:Because of its good fluorescence properties, biocompatibility and low toxicity, amorphous carbon nanoparticles have great potential applications in biological imaging, photocatalysis, biosensor and so on. In this paper, the preparation, characterization and properties of amorphous carbon nanoparticles were investigated. The main contents were as follows: (1) using glucose as raw material, the size of amorphous carbon nanoparticles was smaller, the size distribution was narrow, and the morphology was nearly spherical, by hydrothermal method. Dispersed amorphous carbon nanoparticles. By means of EDS-FTIR and Raman analysis, it can be concluded that the main composition of the sample is Con O, with oxygen functional groups such as carboxyl group and hydroxyl group, and that the sample is amorphous by XRD and SAED analysis. It can be seen that the prepared samples are amorphous carbon nanoparticles. By TEM analysis, it can be known that the prepared samples are spherical in morphology and good in dispersity, and the main factors influencing the preparation of amorphous carbon nanoparticles are as follows: reaction temperature. Reaction time and concentration of glucose solution. With the increase of reaction temperature, the size of amorphous carbon nanoparticles decreased, and when the reaction temperature reached 200 鈩，

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