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生物质化学工程 ›› 2014, Vol. 48 ›› Issue (3): 30-35.doi: 10.3969/j.issn.1673-5854.2014.03.006

• 研究报告 • 上一篇    下一篇

生物质基碳量子点的制备及其光谱性质研究

张正伟, 彭可睿, 陈建秋, 严拯宇   

  1. 中国药科大学 理学院, 江苏 南京 210009
  • 收稿日期:2013-11-05 出版日期:2014-05-30 发布日期:2014-05-29
  • 通讯作者: 陈建秋,男,副教授,硕士生导师,从事纳米材料绿色合成研究工作;E-mail:cjqer@163.com; 严拯宇,女,教授,博士生导师,从事药物分析研究工作;E-mail:yanzhengyujiang@126.com。 E-mail:cjqer@163.com;yanzhengyujiang@126.com
  • 作者简介:张正伟(1989- ),男,江苏淮安人,硕士生,主要从事纳米材料在药物分析中的应用研究工作
  • 基金资助:
    江苏省环境工程重点实验室开放基金(KF2009008)

Preparation of Carbon Quantum Dots by Biologic Matters and Its Spectrum Properties

ZHANG Zheng-wei, PENG Ke-rui, CHEN Jian-qiu, YAN Zheng-yu   

  1. School of Science, China Pharmaceutical University, Nanjing 210009, China
  • Received:2013-11-05 Online:2014-05-30 Published:2014-05-29

摘要: 以木屑为前驱物制备的活性炭为碳源,采用化学氧化法,用聚乙二醇2000进行表面钝化,制备出了水溶性的生物质基碳量子点。优化了CQDs的合成方法:0.3 g生物质基活性炭, 40 mL HAc-80 mL 30% H2O2 混合氧化剂,反应温度为100 ℃,反应时间为12 h。采用微波和超声结合法进行钝化,修复了CQDs的表面缺陷,荧光强度和量子产率均得到了提高。采用透射电子显微镜、紫外-可见吸收光谱仪、荧光分光光度计和傅里叶红外分光光度计进行表征,所合成的碳量子点发光性能优异、粒径小、分散性好,且无团聚现象。进一步考察了光照、温度和体系pH值对碳量子点性能的影响,结果表明,光稳定性好,抗光漂白性优异,荧光强度具有pH值依赖性,且易于表面功能化。

关键词: 碳量子点, 化学氧化法, 表征, 光谱性质

Abstract: Using activated carbon prepared by sawdust and PEG2000 as surface coated agent, water-soluble carbon quantum dots were synthesized by chemical oxidation method. The method of synthesis of CQDs was optimized. The optimed synthesis condition of CQDs was 0.3 g of standast activated carbon, the mixed oxidant of 40 mL HAc-80 mL 30% H2O2, at the temperature of 100 ℃ for 12 h. In order to repair the surface defect of CQDs, a passivation treatment is perfermed using ultrasonic and micromave methods. The structures and optical properties of the obtained CQDs were characterized by transmission electron microscope (TEM), Ultraviolet-Visible (UV-Vis) spectroscopy, photoluminescence (PL) spectroscopy and Fourier transform infrared spectrophotometer (FT-IR). The prepared CQDs feature the excellent optical performance and high dispersion without agglomeration. The effects of ambient temperature, light and pH value on the property of CQDs were studied. Experimental results show that CQDs have lots of advantages, such as good stability, excellent anti-light bleaching, pH value dependence and feasible surface functionalization.

Key words: CQDs, chemical oxidation, characterization, spectrum properties

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