Facile synthesis and performance of pH/temperature dual-response hydrogel containing lignin-based carbon dots

Sun, Lan; Mo, Zhen-ye; Li, Qiong; Zheng, Dafeng; Qiu, Xueqing; Pan, Xuejun

doi:10.1016/j.ijbiomac.2021.02.049

Cited by 49 publications

(25 citation statements)

References 61 publications

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“…More importantly, all C-rich materials are theoretically sources for CDs and CNFs. CNF hydrogel precursors and CDs can be generated simultaneously from biosourced materials via one-pot hydrothermal methods [158,159] . This method is cheap and nontoxic.…”

Section: 31carbon Dotsmentioning

confidence: 99%

“…The surface functional groups (amino, amide, carbonyl, and carboxyl groups) of CDs undergo reversible protonation and deprotonation based on pH. When the valence bands of CDs are filled or depleted, the fluorescence intensity and emission peaks change [170,171] (Figure 12e) . Because CDs exhibit stable fluorescence, the tested targets only affect the fluorescence intensity and hardly change the fluorescence properties.…”

Section: 31carbon Dotsmentioning

confidence: 99%

“…In particular, all BFHs require the assistance of QDs or fluorophores, as no biomacromolecule emits fluorescence (except for the green fluorescent protein in luminescent microorganisms). Furthermore, some recent reports fused PCHs and FHs into a system called fluorescent PCHs [159,160] . This may be an interesting new development direction, but more research is needed to determine whether the effects of the change in grating diffraction and SPR on fluorescence are beneficial.…”

Section: Cross-relationships Of Different Ohsmentioning

confidence: 99%

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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%

Section: 31carbon Dotsmentioning

confidence: 99%

Section: Cross-relationships Of Different Ohsmentioning

confidence: 99%

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Application of optical hydrogels in environmental sensing

Yang

Sarkar

Xie

et al. 2023

Preprint

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“…With extensive aromatic structure and abundant active sites, lignin is considered a potential precursor to prepare CDs. 26,27 In this work, alkali lignin, a commercially aromatic biomass with abundant annual output, was selected as the raw material to prepare the CDs. Subsequently, abundant -COOH groups were introduced into lignin through a microwaveassisted carboxymethylation process.…”

Section: Introductionmentioning

confidence: 99%

Stable lignin-based afterglow materials with ultralong phosphorescence lifetimes in solid-state and aqueous solution

Zhang

Zhou²,

et al. 2023

Green Chem.

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“…Belonging to the functionalized hydrogels, fluorescent hydrogels are often used in ion detection and other fields [ 3 , 4 , 5 , 6 ]. Typically, fluorescent hydrogels can be obtained by using luminescent materials, such as organic fluorescent dyes [ 7 , 8 ], rare earth elements [ 9 , 10 , 11 ], and biomass carbon dots [ 12 , 13 , 14 ]. Alongside its new properties, fluorescent hydrogels retain the good mechanical, chemical, and biological properties of typical hydrogels [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Agarose Fluorescent Hydrogel Inserted by POSS and Its Application for the Identification and Adsorption of Fe3+

et al. 2021

Gels

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After entering in water, Fe3+ is enriched in the human body and along the food chain, causing chronic poisoning and irreversible harm to human health. In order to solve this problem, we synthesized citric acid POSS (CAP) from aminopropyl POSS (OAP) and citric acid. Then, we synthesized fluorescent hydrogels (CAP-agarose hydrogel, CAHG) with CAP and agarose. The luminescence mechanism of CAP was investigated by theoretical calculation. CAP plays a dual role in composite hydrogels: one is to give the gels good fluorescence properties and detect Fe3+; the second is that the surface of CAP has a large content of carbonyl and amide groups, so it can coordinate with Fe3+ to enhance the adsorption properties of hydrogels. The experimental results show that the lowest Fe3+ concentration that CAHG can detect is 5 μmol/L, and the adsorption capacity for Fe3+ is about 26.75 mg/g. In a certain range, the fluorescence intensity of CAHG had an exponential relation with Fe3+ concentration, which is expected to be applied to fluorescence sensors. Even at a lower concentration, CAHG can effectively remove Fe3+ from the solution. The prepared fluorescent hydrogel has great potential in the field of fluorescent probes, fluorescent sensors, and ion adsorption. Besides, CAHG can be used as photothermal material after adsorbing Fe3+, allowing for material recycling and reducing material waste.

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Facile synthesis and performance of pH/temperature dual-response hydrogel containing lignin-based carbon dots

Cited by 49 publications

References 61 publications

Application of optical hydrogels in environmental sensing

Application of optical hydrogels in environmental sensing

Stable lignin-based afterglow materials with ultralong phosphorescence lifetimes in solid-state and aqueous solution

Preparation of Agarose Fluorescent Hydrogel Inserted by POSS and Its Application for the Identification and Adsorption of Fe3+

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