Algae biomass as a precursor for synthesis of nitrogen-and sulfur-co-doped carbon dots: A better probe in Arabidopsis guard cells and root tissues

Zhang, Che; Xiao, Yumei; Ma, Yongqiang; Li, Baoming; Liu, Zhidan; Lü, Cheng; Li, Xue; Yao, Wei; Zhu, Zhangbing; Zhang, Yuanhui

doi:10.1016/j.jphotobiol.2017.06.024

Cited by 44 publications

(24 citation statements)

References 47 publications

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“…Based on this observation, it has been assumed that the low‐molecular‐weight compounds derived from protein sources may be actively involved in CD formation whereas the high‐molecular‐weight compounds derived from carbohydrate/cellulose/hemicellulose sources support GO formation during the hydrothermal process. Alternatively, based on the Maillard reaction, the condensation of carbohydrate derivatives with some of the protein derivatives may lead to the formation of nitrogen‐containing polymers . These polymers are not involved in CD formation, maybe owing to the inadequate temperature, pH as well as oxygen environment in the system, and result in GO as structure defect moiety.…”

Section: Resultsmentioning

confidence: 99%

“…Alternatively, based on the Maillard reaction, the condensation of carbohydrate derivatives with some of the protein derivatives may lead to the formation of nitrogen-containing polymers. 13 These polymers are not involved in CD formation, maybe owing to the inadequate temperature, pH as well as oxygen environment in the system, and result in GO as structure defect moiety. Low-molecular-weight compounds may be involved in CD formation under the studied conditions.…”

Section: Possible Mechanisms Of Go-cd Composite Formationmentioning

confidence: 99%

“…11,12 As an alternative, because of their unique physical properties and chemical compositions, bio-oils can be effectively used for the preparation of carbon materials. Very recently, Zhang et al 13 reported the synthesis of nitrogen and sulfur co-doped carbon dots from microalgal biomass (Nannochloropsis)-derived bio-oil using a microwave process.…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal synthesis, characterization and seed germination effects of green‐emitting graphene oxide‐carbon dot composite using brown macroalgal bio‐oil as precursor

Sankaranarayanan

Vishnukumar²,

Hariram

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Bio‐oils can be effectively used for the preparation of bio‐based materials owing to their chemical compositions. In this study, brown macroalgal‐derived bio‐oil was used for the synthesis of graphene oxide‐carbon dot composite by a simple hydrothermal process. RESULTS A simple and facile hydrothermal process was explored for the preparation of green‐emitting graphene oxide‐carbon dot (GO‐CD) composite from brown macroalgal biomass‐derived bio‐oil as carbon source in water medium at 170 °C for 4 h. An aqueous solution of the prepared GO‐CD composite exhibited green emission under ultraviolet (UV) radiation exposure. Raman spectroscopy and transmission electron microscopy analyses confirmed the successful formation of GO‐CD composite. Physicochemical characterizations such as phase structure and optical properties of the GO‐CD were investigated by X‐ray diffraction, UV–visible and photoluminescence analyses. The effects of the GO‐CD composite on the seed germination of mung bean were studied. It was found that, compared with the control (100/0 vol% water; total length of plant ∼20 cm), the 75/25 vol% water/GO‐CD ratio treatment resulted in better plant growth (total length of plant ∼25 cm) under the studied conditions. Further increase in GO‐CD concentration above the optimum level resulted in a decrease in plant growth but did not have a significant effect on the mass, root and leaf mass development. CONCLUSION Brown macroalgal bio‐oil‐derived graphene oxide‐carbon dot composite were explored for the seed germination of mung bean and the results showed that a low concentration enhanced the plant growth. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Possible Mechanisms Of Go-cd Composite Formationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrothermal synthesis, characterization and seed germination effects of green‐emitting graphene oxide‐carbon dot composite using brown macroalgal bio‐oil as precursor

Sankaranarayanan

Vishnukumar²,

Hariram

et al. 2019

J of Chemical Tech & Biotech

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“…Cdots have been produced from raw microalgae as a primary product and effectively used as 335 a fluorescent bioimaging probe (Guo et al, 2017;Zhang et al, 2017). Compared with the methods previously reported for the primary production of microalgae Cdots, the method reported in this article not only provides a value-added product from industrial waste, but is also a simpler and faster approach using a two-step method with 4 h of processing time to produce MAB-Cdots.…”

Section: Discussionmentioning

confidence: 99%

“…While Cdots have been intentionally synthesised from microalgae biomass, this is the first report of Cdots derived from microalgae biochar (MAB-Cdots) and evaluated in heavy metal ion detection. Cdots produced from microalgae biomass have been used as fluorescent bioimaging probes for Arabidopsis thaliana and human breast cancer MCF-7 cells (Guo et al, 2017;Zhang et al, 2017). However, these microalgae-derived Cdots have not been evaluated for sensing heavy metal ions in aqueous systems.…”

mentioning

confidence: 99%

Microalgae biochar-derived carbon dots and their application in heavy metal sensing in aqueous systems

Plácido

Bustamante-López

Meissner

et al. 2019

Science of The Total Environment

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This research seeks a coupled solution for managing the large amounts of biochar produced by microalgae biofuels production, and the necessity for novel, economic and accurate heavy metal sensing methods. Therefore, this study evaluated the transformation of microalgae biochar (MAB) into carbon dots (Cdots) and their subsequent application as heavy metal ion sensors in aqueous systems. The experimental phase included the transformation of MAB into microalgae biochar-derived carbon dots (MAB-Cdots), MAB-Cdot characterisation and the evaluation of the MAB-Cdots as transducers for the detection of four heavy metal ions

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Doping and Surface Modification of Carbon Quantum Dots for Enhanced Functionalities and Related Applications

John

Nair

2021

Part & Part Syst Charact

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Carbon quantum dots (CQDs) are a unique class of 0D nanomaterials, featured by a graphitic core and shell layers saturated with hydrogen atoms and functional groups. CQDs are prepared through top‐down and bottom‐up strategies from natural and synthetic precursors. CQDs can be modified through chemical (e.g., surface functionalization/passivation, doping, etc.) and physical (e.g., core–shell architecture, composite material blending, etc.) strategies to control their properties. This review highlights the effect of such modifications on the photophysical properties of CQDs, such as photoluminescence (PL), absorbance, and relaxivity. The dependence of PL upon the size, orientation at the edges, surface and edge functionalization, doping, excitation wavelength, concentration, pH, aggregate formation, etc., are summarized along with the supporting theoretical evidence available in the literature. Also, this review outlines the recent advancements, and future prospective of optical (e.g., sensing, bioimaging, and fluorescent ink) and catalytic applications (e.g., photocatalysis and electrocatalysis) of CQDs enhanced through physical and chemical modifications of their structure and composition.

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Algae biomass as a precursor for synthesis of nitrogen-and sulfur-co-doped carbon dots: A better probe in Arabidopsis guard cells and root tissues

Cited by 44 publications

References 47 publications

Hydrothermal synthesis, characterization and seed germination effects of green‐emitting graphene oxide‐carbon dot composite using brown macroalgal bio‐oil as precursor

Hydrothermal synthesis, characterization and seed germination effects of green‐emitting graphene oxide‐carbon dot composite using brown macroalgal bio‐oil as precursor

Microalgae biochar-derived carbon dots and their application in heavy metal sensing in aqueous systems

Doping and Surface Modification of Carbon Quantum Dots for Enhanced Functionalities and Related Applications

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