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<p>In this study, Cu-doped carbon aerogel was synthesized from the cellulose of <i>Nypa fruticans</i> shells (Cu-SA-NCA) using sodium alginate as a cross-linked through two-step simple processes, including freeze-drying and pyrolysis. The characterization of the material was analyzed by various modern analytical techniques such as scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray powder diffraction, Fourier-transform infrared spectroscopy, N<sub>2</sub> gas adsorption/desorption, Raman, and X-ray photoelectron spectroscopy. The results demonstrated that the as-prepared carbon aerogel possessed a hierarchical porous structure and good specific surface. Besides, the Cu-SA-NCA exhibited a great adsorption performance toward 4-aminophenol with the highest adsorption capacity reaching 39.57 mg/g. Furthermore, the electrochemical properties of the Cu-SA-NCA were determined through a cyclic voltmeter and electrochemical impedance spectroscopy, indicating a good specific capacitance of 243.2 F/g at 5 mV/s. Moreover, the Cu-SA-NCA indicated the electrochemical sensing property toward vitamin C with the limit of detection of 0.83 µM, along with the potential in the sensing ability of this vitamin on three kinds of citrus fruits in Vietnam, including kumquat, lime, and sweet orange. According to the aforementioned results, the Cu-SA-NCA from <i>Nypa fruticans</i> shells is potentially applicable in environmental remediation, supercapacitor for energy storage, and electrochemical sensing.</p> Graphical Abstract <p></p>

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Copper-doped biomass-derived cellulose carbon aerogel for applications in pollutant adsorption, energy storage, and vitamin C sensor in citrus fruit juice

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • Nguyen Huu Hieu,
  • Dang Thanh Cong Minh,
  • Nguyen The Anh,
  • Tran Nguyen Cam Nhung,
  • Pham Trong Liem Chau,
  • Mai Thanh Phong

摘要

In this study, Cu-doped carbon aerogel was synthesized from the cellulose of Nypa fruticans shells (Cu-SA-NCA) using sodium alginate as a cross-linked through two-step simple processes, including freeze-drying and pyrolysis. The characterization of the material was analyzed by various modern analytical techniques such as scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray powder diffraction, Fourier-transform infrared spectroscopy, N2 gas adsorption/desorption, Raman, and X-ray photoelectron spectroscopy. The results demonstrated that the as-prepared carbon aerogel possessed a hierarchical porous structure and good specific surface. Besides, the Cu-SA-NCA exhibited a great adsorption performance toward 4-aminophenol with the highest adsorption capacity reaching 39.57 mg/g. Furthermore, the electrochemical properties of the Cu-SA-NCA were determined through a cyclic voltmeter and electrochemical impedance spectroscopy, indicating a good specific capacitance of 243.2 F/g at 5 mV/s. Moreover, the Cu-SA-NCA indicated the electrochemical sensing property toward vitamin C with the limit of detection of 0.83 µM, along with the potential in the sensing ability of this vitamin on three kinds of citrus fruits in Vietnam, including kumquat, lime, and sweet orange. According to the aforementioned results, the Cu-SA-NCA from Nypa fruticans shells is potentially applicable in environmental remediation, supercapacitor for energy storage, and electrochemical sensing.

Graphical Abstract