Carbon Dots Derived from the Maillard Reaction for pH Sensors and Cr (VI) Detection

Ma, Zhi; Ma, Yanyun; Gu, Meiyu; Huo, Xiyue; Ma, Sainan; Lu, Yini; Yao, Ning; Zhang, Xuan; Tian, Bingbing; Feng, Zhibiao

doi:10.3390/nano10101924

Cited by 18 publications

(4 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Few methods are currently available for pH determination using CDs as sensors. Ma et al [ 100 ] prepared CDs based on the Maillard reaction (MR-CDs) using L-tryptophan and D-glucose, which exhibited stable pH-dependent behavior and showed an excellent optical linear response to pH in the range of 4.0–7.5 and 7.5–13.0. Zhu et al [ 101 ] prepared fluorescent CDs by a hydrothermal method using natural kelp as a carbon source and modified the surface of the CDs with polyethyleneimine (PEI), which was conjugated with fluorescein isothiocyanate (FITC) to synthesize a CDs-FITC composite.…”

Section: Application Of Cds In Food Testingmentioning

confidence: 99%

Research Progress in the Synthesis of Carbon Dots and Their Application in Food Analysis

Zhang

Gao

et al. 2022

Biosensors

View full text Add to dashboard Cite

Food safety is connected to public health, making it crucial to protecting people’s health. Food analysis and detection can assure food quality and effectively reduce the entry of harmful foods into the market. Carbon dots (CDs) are an excellent choice for food analysis and detection attributable to their advantages of good optical properties, water solubility, high chemical stability, easy functionalization, excellent bleaching resistance, low toxicity, and good biocompatibility. This paper focuses on the optical properties, synthesis methods, and applications of CDs in food analysis and detection, including the recent advances in food nutritional composition analysis and food quality detection, such as food additives, heavy metal ions, foodborne pathogens, harmful organic pollutants, and pH value. Moreover, this review also discusses the potentially toxic effects, current challenges, and prospects of CDs in basic research and applications. We hope that this review can provide valuable information to lay a foundation for subsequent research on CDs and promote the exploration of CDs-based sensing for future food detection.

show abstract

Section: Application Of Cds In Food Testingmentioning

confidence: 99%

Research Progress in the Synthesis of Carbon Dots and Their Application in Food Analysis

Zhang

Gao

et al. 2022

Biosensors

View full text Add to dashboard Cite

show abstract

“…Among these, N-doping also plays a very important role. For example, CDs prepared by Maillard reaction with L-tryptophan as N resources own excellent photoluminescence stability and stable pH-dependence and could be used to selectively detect Cr (VI) in tap water [ 22 ]. Jute-derived fluorescent surface-quaternized CDs were developed as fluorescent nanobuttons to detect aqueous chromium (VI) and a pH-responsive drug release carrier [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

“…High-resolution XPS spectra of Ag3d of Ag-CDs at pH 1.32 (a), 2.25 (b), Ag-CDs (c), 11.10 (d), 12.15 (e), 12.97 (f), respectively; Figure S7. High-resolution XPS spectra of N1s of Ag-CDs at pH 1.32 (a), 2.25 (b), Ag-CDs (c), 11.10 (d), 12.15 (e), 12.97 (f), respectively; Table S1 [ 6 , 22 , 24 , 43 , 44 , 45 , 46 , 47 , 48 ]. Comparisons of pH sensing range of various fluorescent probes based on carbon dots.…”

mentioning

confidence: 99%

pH-Sensitive Silver-Containing Carbon Dots Based on Folic Acid

Wang

2022

Materials

View full text Add to dashboard Cite

Herein, Ag-containing carbon dots (Ag-CDs) was synthesized based on folic acid. In a neutral solution, its fluorescence emission owns a structure fixing fluorescent species with the emission maximum at 400 nm and an excitation-wavelength dependent fluorescent species, respectively. By comparing fluorescent emission and excitation spectra, the electronic absorption origins of these fluorescent species were assigned. With the assistance of UV–Vis absorption and XPS, the pH-regulating fluorescence mechanism of Ag-CDs was studied and proposed. A particularly strong fluorescence emitter was observed at pH ~12 with a mixing coordination structure as Ag(CDs-NH2)OH. The as-prepared Ag-CDs might be developed into a fluorescent sensor, especially at extremely basic conditions.

show abstract

“…For many years, nanodots with metallic core of semiconductor nature such as zinc sulfide, zinc selenium, cadmium selenium and others where extensively studied over their applicability in photovoltaics [9][10][11], photocatalysis [12][13][14] or photosensing [15][16][17]. They can be also used for bioimaging or biodetection [18][19][20][21][22]. Importantly, aforementioned nanomaterials may exhibit various cytotoxic effects such as reactive oxygen species generation leading to nucleic acids, proteins and mitochondria damage, accumulation on cells surface causing their proper functionality disturbance or metallic ions leakage.…”

Section: Introductionmentioning

confidence: 99%

Coumarin-Modified CQDs for Biomedical Applications—Two-Step Synthesis and Characterization

Janus

Radwan-Pragłowska

Piątkowski

et al. 2020

IJMS

View full text Add to dashboard Cite

Waste biomass such as lignin constitutes a great raw material for eco-friendly carbon quantum dots (CQDs) synthesis, which find numerous applications in various fields of industry and medicine. Carbon nanodots, due to their unique luminescent properties as well as water-solubility and biocompatibility, are superior to traditional organic dyes. Thus, obtainment of CQDs with advanced properties can contribute to modern diagnosis and cell visualization method development. In this article, a new type of coumarin-modified CQD was obtained via a hybrid, two-step pathway consisting of hydrothermal carbonization and microwave-assisted surface modification with coumarin-3-carboxylic acid and 7-(Diethylamino) coumarin-3-carboxylate. The ready products were characterized over their chemical structure and morphology. The nanomaterials were confirmed to have superior fluorescence characteristics and quantum yield up to 18.40%. They also possessed the ability of biomolecules and ion detection due to the fluorescence quenching phenomena. Their lack of cytotoxicity to L929 mouse fibroblasts was confirmed by XTT assay. Moreover, the CQDs were proven over their applicability in real-time bioimaging. Obtained results clearly demonstrated that proposed surface-modified carbon quantum dots may become a powerful tool applicable in nanomedicine and pharmacy.

show abstract

Carbon Dots Derived from the Maillard Reaction for pH Sensors and Cr (VI) Detection

Cited by 18 publications

References 51 publications

Research Progress in the Synthesis of Carbon Dots and Their Application in Food Analysis

Research Progress in the Synthesis of Carbon Dots and Their Application in Food Analysis

pH-Sensitive Silver-Containing Carbon Dots Based on Folic Acid

Coumarin-Modified CQDs for Biomedical Applications—Two-Step Synthesis and Characterization

Contact Info

Product

Resources

About