A novel fluorescent nanocellulosic hydrogel based on carbon dots for efficient adsorption and sensitive sensing in heavy metals

Guo, Xin; Xü, Dong; Yuan, Hanmeng; Luo, Qiu‐Yan; Tang, Shiyao; Liu, Liu; Wu, Yiqiang

doi:10.1039/c9ta11502a

Cited by 101 publications

(64 citation statements)

References 47 publications

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“…In addition, high adsorbent with high porosity, high surface area, and the reuse possibility, causing hydrogel an efficient platform for adsorption or removal operation. [639][640][641][642] For example, Pinto et al [643] developed one promising adsorbent based on chitosan hydrogel scaffold modified with carbon nanotubes, for food dye removal in single and binary aqueous systems. In addition, there are a lot of researches in the field of environmental science on the use of hydrogels to remove heavy metals and other pollutants can also be considered for application in food science.…”

Section: Adsorption and Removalmentioning

confidence: 99%

Hydrogel: Diversity of Structures and Applications in Food Science

Jia

Luo

2021

Food Reviews International

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Hydrogels are a series of soft and wet materials with three dimensions of crosslinked networks. Hydrogels have attracted great attention due to their diverse functional properties, and their wide range of applications, such as in soft robots and actuators, stretched electronic devices, tissue engineering materials, controlled-release drug delivery vehicles, biomedicine materials, food science, and (bio)sensors. In general, there are four core concerns in hydrogel science, including the polymer source, structure fabrication, gel function, and gel applications. According to the logic that the "structure determines function", it is believed that rational design of structures can effectively regulate the functions and applications of hydrogels. Hence, in the current review, "structure" as the core topic will be highly regarded, and the crosslinking mechanisms and structural diversity of hydrogels are comprehensively summarized. Additionally, hydrogels also show their great application potential in food science. Hence, the current review also pays more attention to the application of hydrogels in food nutrition and health, food engineering and processing, and food safety. It is whished that this review not only serves as a reference for improving the comprehensive understanding of the structural design of hydrogels but also provides a forward-looking idea for hydrogel applications in food science.

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Section: Adsorption and Removalmentioning

confidence: 99%

Hydrogel: Diversity of Structures and Applications in Food Science

Jia

Luo

2021

Food Reviews International

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“…An emission of vivid iridescent fluorescence (at 450–470 nm) was observed at 260 nm excitation, with a QY around 5.2%, although films without PVA showed no obvious afterglow at the same excitation wavelength since the CDs were doped into PVA to increase the restriction of molecular movement, prevent oxygen quenching, and protect the triplet state excitation. [ 200 ] Moreover, Guo et al [ 165 ] developed a fluorescent hydrogel based on carboxymethylated CNF (CM‐CNF) and N‐CDs (from citric acid) with potential applicability in heavy metal absorbance and optical sensing. The multifunctional hydrogel showed intense blue fluorescence at optimal emission and excitation wavelengths of 462 and 382 nm, respectively, with a QY reaching 23.6%.…”

Section: Light Emission From Lignocellulosic Materials or Additivesmentioning

confidence: 99%

Plant‐Based Structures as an Opportunity to Engineer Optical Functions in Next‐Generation Light Management

et al. 2021

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This review addresses the reconstruction of structural plant components (cellulose, lignin, and hemicelluloses) into materials displaying advanced optical properties. The strategies to isolate the main building blocks are discussed, and the effects of fibrillation, fibril alignment, densification, self‐assembly, surface‐patterning, and compositing are presented considering their role in engineering optical performance. Then, key elements that enable lignocellulosic to be translated into materials that present optical functionality, such as transparency, haze, reflectance, UV‐blocking, luminescence, and structural colors, are described. Mapping the optical landscape that is accessible from lignocellulosics is shown as an essential step toward their utilization in smart devices. Advanced materials built from sustainable resources, including those obtained from industrial or agricultural side streams, demonstrate enormous promise in optoelectronics due to their potentially lower cost, while meeting or even exceeding current demands in performance. The requirements are summarized for the production and application of plant‐based optically functional materials in different smart material applications and the review is concluded with a perspective about this active field of knowledge.

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“…Additionally, the hydrogel’s fluorescence was rapidly quenched in the presence of Fe 2+ , and therefore, was applied for the visual optical detection of the ion. The quenching phenomenon is attributed to the constraints of the hydrogel’s fluorescence excitation as a result of the adsorption of the Fe 3+ [ 138 ]. In another interesting study, an antibacterial wound dressing was developed from a nanocolloidal hydrogel composed of CD/cellulose nanocrystal hybrid nanoparticles and gelatin.…”

Section: Cds In Optical-based Analyticalmentioning

confidence: 99%

Carbon Dots: An Emerging Smart Material for Analytical Applications

2021

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Carbon dots (CDs) are optically active carbon-based nanomaterials. These nanomaterials can change their light emission properties in response to various external stimuli such as pH, temperature, pressure, and light. The CD’s remarkable stimuli-responsive smart material properties have recently stimulated massive research interest for their exploitation to develop various sensor platforms. Herein, an effort has been made to review the major advances made on CDs, focusing mainly on its smart material attributes and linked applications. Since the CD’s material properties are largely linked to their synthesis approaches, various synthesis methods, including surface passivation and functionalization of CDs and the mechanisms reported so far in their photophysical properties, are also delineated in this review. Finally, the challenges of using CDs and the scope for their further improvement as an optical signal transducer to expand their application horizon for developing analytical platforms have been discussed.

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A novel fluorescent nanocellulosic hydrogel based on carbon dots for efficient adsorption and sensitive sensing in heavy metals

Abstract: A novel fluorescent nanocellulosic hydrogel based on carbon dots for efficient adsorption and sensitive sensing of heavy metals was synthesized.

Cited by 101 publications

References 47 publications

Hydrogel: Diversity of Structures and Applications in Food Science

Hydrogel: Diversity of Structures and Applications in Food Science

Plant‐Based Structures as an Opportunity to Engineer Optical Functions in Next‐Generation Light Management

Carbon Dots: An Emerging Smart Material for Analytical Applications

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