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Chemistry and Industry of Forest Products ›› 2020, Vol. 40 ›› Issue (3): 61-68.doi: 10.3969/j.issn.0253-2417.2020.03.008

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Synchronous Synthesis of Carbon Nanodots Formed on Pre-hydrolysis of Lignocellulose

Shunli LI,Yu LIU,Fei HUANG,Kai LIU,Honglei CHEN*()   

  1. State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology(Shandong Academy of Sciences), Jinan 250353, China
  • Received:2019-11-04 Online:2020-06-28 Published:2020-06-29
  • Contact: Honglei CHEN E-mail:chenhonglei_1982@163.com

Abstract:

During the process of hot water pre-hydrolysis of eucalyptus wood chips, a tiny amounts of urea was added to obtain the hot water pre-hydrolysis liquor.The produced pre-hydrolysis liquor(PHL) showed excellent fluorescence with the properties of concentration quenching and excitation wavelength dependence. The existence of graphite carbon structure in the pre-hydrolysis liquor was confirmed by X-ray diffraction (XRD) and Raman spectroscopy. The analysis of transmission electron microscopy (TEM) and atomic force microscopy (AFM) confirmed that graphite carbon existed in the form of carbon nanodots (CNDs) and the quantum yield was 19.43%. Furthermore, the structure and composition of CNDs were characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR). The results showed that the surface of CNDs was rich in functional groups such as hydroxyl, carboxyl and amino groups, CNDs were successfully doped with N element, and the fluorescence intensity of CNDs was relatively stable when the pH value was 3.67-9.42.The average life of CNDs was 3.07 ns.

Key words: pre-hydrolysis liquor, carbon nanodots, lignocellulose, fluorescence properties

CLC Number: