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A highly efficient, rapid, room temperature synthesis method for coal-based water-soluble fluorescent carbon dots and its use in Fe3+ ion detection

CHENG Zhong-fu WU Xue-yan LIU Lei HE Long YANG Zu-guo CAO Chang LU Yan GUO Ji-xi

程仲富, 吴雪岩, 刘磊, 何龙, 杨祖国, 曹畅, 吕燕, 郭继玺. 水溶性煤基发光碳点的室温快速合成及其在Fe3+离子检测中的应用. 新型炭材料(中英文), 2023, 38(6): 1104-1115. doi: 10.1016/S1872-5805(23)60706-1
引用本文: 程仲富, 吴雪岩, 刘磊, 何龙, 杨祖国, 曹畅, 吕燕, 郭继玺. 水溶性煤基发光碳点的室温快速合成及其在Fe3+离子检测中的应用. 新型炭材料(中英文), 2023, 38(6): 1104-1115. doi: 10.1016/S1872-5805(23)60706-1
CHENG Zhong-fu, WU Xue-yan, LIU Lei, HE Long, YANG Zu-guo, CAO Chang, LU Yan, GUO Ji-xi. A highly efficient, rapid, room temperature synthesis method for coal-based water-soluble fluorescent carbon dots and its use in Fe3+ ion detection. New Carbon Mater., 2023, 38(6): 1104-1115. doi: 10.1016/S1872-5805(23)60706-1
Citation: CHENG Zhong-fu, WU Xue-yan, LIU Lei, HE Long, YANG Zu-guo, CAO Chang, LU Yan, GUO Ji-xi. A highly efficient, rapid, room temperature synthesis method for coal-based water-soluble fluorescent carbon dots and its use in Fe3+ ion detection. New Carbon Mater., 2023, 38(6): 1104-1115. doi: 10.1016/S1872-5805(23)60706-1

水溶性煤基发光碳点的室温快速合成及其在Fe3+离子检测中的应用

doi: 10.1016/S1872-5805(23)60706-1
基金项目: 新疆维吾尔族自治区重点实验室开放课题(2023D04032);中央引导地方科技发展资金项目(ZYYD2023B12);国家自然科学基金项目(22105163, U2003307, 201972123);新疆科技创新高层次领军人才项目(2022TSYCLJ0043);新疆维吾尔自治区自然科学基金(2020D01C062);新疆维吾尔族自治区天山创新团队(2021D01D09, 2021D01C097)
详细信息
    通讯作者:

    郭继玺,博士,教授. E-mail:jxguo1012@163.com

  • 中图分类号: TQ127.1+1

A highly efficient, rapid, room temperature synthesis method for coal-based water-soluble fluorescent carbon dots and its use in Fe3+ ion detection

More Information
  • 摘要: 碳量子点具有优异的光学性质,良好的水溶性、低毒性、原料来源广、成本低、生物相容性好等诸多优点,广泛应用于发光器件、生物检测、能源存储与转换领域,但在实际应用中还存在合成过程复杂、产率低等挑战。本文以煤为原料,以甲酸和双氧水为氧化剂,在室温下可大量合成煤基发光碳点,考查了氧化剂的添加量、反应时间对煤基发光碳点的产率及反光性质的影响,结果表明煤基发光碳点产率高达54%,且具有良好的水溶性、光稳定性、耐盐性和较高的发光量子效率。制备的煤基发光碳点可用于Fe3+离子的特异性检测,检测限低于600 n mol L−1。该合成方法为煤的高附加值利用和设计开发煤基新材料提供了新途径。
  • FIG. 2782.  FIG. 2782.

    FIG. 2782..  FIG. 2782.

    Figure  1.  Schematic diagram of the synthesis of coal-based CDs and its application in Fe3+ ion detection

    Figure  2.  (a) TEM image of CDs showing a regular size and size distribution. (b) HRTEM image of a representative CD particle

    Figure  3.  FTIR spectra of raw coal and as-made CDs

    Figure  4.  (a) XPS survey spectrum and high-resolution XPS of (b) C1s, (c) N1s and (d) O1s of CDs

    Figure  5.  (a) UV-Vis and fluorescence excitation and emission spectra of the CDs, the insets in (a) are photographs of the CD aqueous solution taken under day light (left) and 365 nm UV light (right). (b) The corresponding fluorescence spectra under different excitation wavelengths ranging from 280 to 520 nm, (cCDs = 0.05 mg/mL)

    Figure  6.  (a) Selectivity of the as-made CDs as a probe for metal ions in water, at the metal ions concentration of 500 μmol/L. (b) Interference experiments of the aqueous CD solution towards Fe3+ (red bars) and other metal ions (blue bars). (c) Photoluminescence spectra of the CDs at various concentrations of Fe3+ from 0 to 200 μmol/L from top to bottom. (d) The emission intensity ratio F0/F depends on the concentration of the added Fe3+, which is derived from the results of (c). Here, F and F0 are the luminescence intensities of CDs at 450 nm in the presence and absence of Fe3+ ion, respectively. The concentration of the CDs is 0.2 mg/mL, (λex = 320 nm, λem = 450 nm)

    Figure  7.  (a) UV-Vis absorption spectra of Fe3+ and CDs in absence and presence of Fe3+. (b) Fluorescence excitation and emission spectra of CDs and UV-Vis absorption spectrum of Fe3+. (c) Fluorescence decay curves of CDs in absence and presence of Fe3+ measured with excitation and emission wavelengths of 340 and 450 nm, respectively. The concentration of the CDs is 0.2 mg/mL (λex = 320 nm, λem = 450 nm)

    Table  1.   The comparison of different synthesis methods of CDs

    PrecursorsSynthesis processPost-processing stepsYieldsRef
    CoalCarbonization, concentrated HNO3, 140 °C, 24 h.Centrifugalization, dialysis 5 days6%-30%[34]
    CoalConcentrated HNO3 and H2SO4,
    sonication 2 h, refluxing 24 h.
    Filtration and dialysis, 5 days
    Vacuum dry, redispersion,
    20%[35]
    CoalConcentrated HNO3 refluxing, 12 h.Centrifugalization15%-56%[36]
    CoalConcentrated HNO3 and H2SO4 (1/3, v/v), 100-150 °C, 24 h.Dialysis 3 days20%[37]
    Coal30% H2O2 solution, 80 °C, 4 h.Centrifugalization10%[38]
    CoalDMF, 180 °C, 12 h.Centrifugalization26%[39]
    CoalHCOOH /30% H2O2 (5/1, v/v)
    12 h, room temperature.
    Centrifugalization54%This work
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  • 收稿日期:  2020-07-07
  • 修回日期:  2020-08-20
  • 网络出版日期:  2022-11-03
  • 刊出日期:  2023-11-23

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