Preparation of a composite material based on self-assembly of biomass carbon dots and sodium alginate hydrogel and its green, efficient and visual adsorption performance for Pb2+

Zhang, Siyi; Arkin, Kamile; Zheng, Yuxin; Ma, Jianjun; Bei, Yuyang; Liu, Di; Shang, Qianqian

doi:10.1016/j.jece.2021.106921

Cited by 27 publications

(9 citation statements)

References 38 publications

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“…Chitosanbased CDFHs combined with molecular imprinting technology enable the detection of perfluorooctanesulfonic acid (PFOS) [160] . Furthermore, PEI can be used as a N-rich surface passivator to modify CDs (N doping) and improve the fluorescence quantum yield and performance [149,161] . In CDs treated with PEI (PEI-CD), ClOoxidized the phenol groups of PEI-CD into benzoquinone groups and quenched fluorescence via the ICT principle(Figure 12c) .…”

Section: 31carbon Dotsmentioning

confidence: 99%

Application of optical hydrogels in environmental sensing

Yang

Sarkar

Xie

et al. 2023

Preprint

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The ever-increasing complexity of environmental pollutants urgently warrants the development of new detection technologies. In this context, sensors based on the optical properties of hydrogels enabling fast and easy in situ detection are attracting increasing attention. Herein, the target recognition and sensing mechanisms of two main types of optical hydrogels (OHs) are reviewed and discussed: photonic crystal hydrogels (PCHs) and fluorescent hydrogels (FHs). For PCHs, the environmental stimulus response, target receptors, inverse opal structures, and molecular imprinting techniques related to PCHs are reviewed and summarized. Furthermore, the different types of fluorophores (i.e., compound probes, biomacromolecules, quantum dots, and luminescent microbes) of FHs are summarized. Finally, the data from 138 papers about different OHs are extracted for secondary statistical analysis. The detection performance and potential of various OH types in different environmental pollutant detection scenarios are evaluated, and compared them to those obtained using the standard detection method. Based on this analysis, some possible development directions are proposed, including the fusion of various OHs, introduction of more hydrogel technologies from the biomedical field to the environmental pollutant detection field, and development of multifunctional sensor arrays.

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Section: 31carbon Dotsmentioning

confidence: 99%

Application of optical hydrogels in environmental sensing

Yang

Sarkar

Xie

et al. 2023

Preprint

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“…These carbon dots were then composited with the hydrogel to form a material known as CDs-TOCNC/SA, which exhibited an adsorption capacity of 190.1 mg/g for Pb 2+ . In another study, Zhang et al 19 utilized broccoli as a carbon dot raw material modified with PEI, combined with sodium alginate as a hydrogel raw material, to self-assemble SA@PEI-CDs. This modified carbon dot hydrogel showed a significantly increased adsorption capacity of 380.39 mg/g for Pb 2+ .…”

Section: ■ Introductionmentioning

confidence: 99%

“…As per the literature, hydrogels were prepared using sodium alginate as the raw material. 19 The specific operation is described in S2. 3.…”

Section: ■ Introductionmentioning

confidence: 99%

Carbon Dot-Stabilized Hydrogel Composite: A New Adsorbent for Efficient and Sustainable Pb(II) Removal

Wei,

Zhou,

Wei

et al. 2024

Langmuir

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In this paper, a carbon dot hydrogel composite (CDs-Hy) capable of efficiently removing Pb(II) was prepared by hydrogen bonding self-assembly in combination with carbon dots and a hydrogel. CDs-Hy was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS), and the effect of the adsorption conditions on the adsorption efficiency of CDs-Hy was studied. The results of the study showed that the incorporation of carbon dots, on the one hand, significantly increased the adsorption capacity of the material. On the other hand, it can increase the stability of hydrogels in aqueous solution. The possible adsorption mechanisms were further verified as ion exchange and coordination. CDs-Hy is a novel adsorbent material capable of removing Pb 2+ efficiently, which can be reused several times with high stability.

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“…21 For example, Chen et al 22 constructed a CDs/CNF/CS hydrogel to effectively adsorb Cu( ii ) and Cr( vi ) from solutions. Zhang et al 23 prepared a new SA@PEI-CD material with excellent adsorption performance for Pb 2+ . In consideration of the merits of CDs and LDO, the removal performance of CDs/LDO composites was expected to improve owing to the synergistic effect of CDs and LDO.…”

Section: Introductionmentioning

confidence: 99%