生物质基碳量子点的制备及其光谱性质研究

doi:10.3969/j.issn.1673-5854.2014.03.006

Abstract

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

CLC Number:

TQ35

ZHANG Zheng-wei, PENG Ke-rui, CHEN Jian-qiu, YAN Zheng-yu. Preparation of Carbon Quantum Dots by Biologic Matters and Its Spectrum Properties[J]. bce, 2014, 48(3): 30-35.

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

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