Hydrothermal functionalization of graphene quantum dots extracted from cellulose

Rabeya, Ramisha; Mahalingam, Savisha; Sheng, Lau Kam; Manap, Abreeza; Satgunam, Meenaloshini; Chia, Chin Hua; Akhtaruzzaman, Md.

doi:10.1016/j.cplett.2022.139520

Cited by 3 publications

(3 citation statements)

References 34 publications

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“…Thus, the recycling and upgrading of the liquid products derived from the HTC process would be promising as an inner loop for a sustainable production of HTC products. Notably, graphene quantum dots and carbon nanodots with nanosize dimension have been obtained from aqueous solution under HTC conditions (180–220 °C, 6–24 h). The modification of the HTC process by adding ethylenediamine promoted the generation of nitrogen-doped carbon quantum dots as a fluorescent probe for various applications. , …”

Section: Hydrothermal Treatment Of Model Compounds To Chemicals Fuels...mentioning

confidence: 99%

Hydrothermal Treatment of Biomass Feedstocks for Sustainable Production of Chemicals, Fuels, and Materials: Progress and Perspectives

et al. 2023

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Hydrothermal process is an emerging technology that contributes to sustainable production of biomass-derived chemicals, fuels, and materials. This technology uses hot compressed water to convert various biomass feedstocks including recalcitrant organic compounds in biowastes into desired solid, liquid, and gaseous products. In recent years, considerable progress has been made in the hydrothermal conversion of lignocellulosic as well as nonlignocellulosic biomass to value-added products and bioenergy to fulfill the principles of circular economy. However, it is important to assess hydrothermal processes in terms of their capabilities and limitations from different sustainability aspects so that further advances can be made toward improvement of their technical maturity and commercialization potential. The key aims of this comprehensive review are to (a) explain the inherent properties of biomass feedstocks and physio-chemical characteristics of their bioproducts, (b) elucidate related transformation pathways, (c) clarify the role of hydrothermal process for biomass conversion, (d) evaluate the capability of hydrothermal treatment coupled with other technologies for producing novel chemicals, fuels and materials, (e) explore different sustainability assessments of hydrothermal processes for potential large-scale applications, and (f) offer our perspectives to facilitate the transition from a primarily petro-based to an alternative biobased society in the context of changing climate.

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Section: Hydrothermal Treatment Of Model Compounds To Chemicals Fuels...mentioning

confidence: 99%

Hydrothermal Treatment of Biomass Feedstocks for Sustainable Production of Chemicals, Fuels, and Materials: Progress and Perspectives

et al. 2023

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“…Nanomaterials have experienced significant growth in recent times, and we are witnessing a large number of applications for nanostructured materials in various fields. − A graphene quantum dot (GQD) is a material with zero dimension in the family of carbon nanomaterials and is usually regarded as a shredded portion from a graphene sheet. , The GQD material is investigated extensively ever since its unexpected discovery in the year 2004, at the time of the purification of carbon nanotubes . This material has a honeycomb structure possessing a single carbon layer, and it has been extensively explored recently because of its exceptional structure-related properties, like electrical, optical, and optoelectrical properties. GQDs are an advanced type of quantum dots (QDs), as these materials have good physical and chemical stability, due to their intrinsic inert carbon property. , In addition, GQDs are very eco-friendly materials because of their nontoxicity and biologically inert properties, which have drawn universal interest from industry as well as academic sectors.…”

Section: Introductionmentioning

confidence: 99%

“… 22 , 23 The GQD material is investigated extensively ever since its unexpected discovery in the year 2004, at the time of the purification of carbon nanotubes. 24 This material has a honeycomb structure possessing a single carbon layer, 25 and it has been extensively explored recently because of its exceptional structure-related properties, like electrical, optical, and optoelectrical properties. GQDs are an advanced type of quantum dots (QDs), as these materials have good physical and chemical stability, due to their intrinsic inert carbon property.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Preparation of Graphene Quantum Dots from Leaves of Date Palm Tree

2023

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The date palm (Phoenix dactylifera), a subtropical and tropical tree, included in the family Palmae (Arecaceae) is one of the oldest cultivated plants of mankind. Date palm is a major agricultural product in the semi-arid and arid areas of the world, particularly in Arab countries. These trees generate high quantities of agricultural waste in the form of dry leaves, seeds, etc. In this study, dried date palm leaves were used as green precursors for synthesizing graphene quantum dots (GQDs). This work reported the preparation of GQDs using two different sustainable methods. GQD-1 was developed using a simple, hydrothermal technique at 200 °C for 12 h in water, with no requirement of reducing or passivizing agents or organic solvents. GQD-2 was prepared using a hydrothermal technique at 200 °C for 12 h in water, with the usage of just distilled water and absolute ethanol. The compositional analysis of the leaf extract was performed, along with the morphological, compositional, and optical examination of the sustainably developed GQDs. The characterization results confirmed the successful formation of GQDs, with average sizes ranging from 3.5 to 8 nm. This study helps to obtain GQDs in an economical, eco-friendly, and biocompatible manner and can assist in large-scale production and in recycling date palm tree waste products from Middle East countries into value-added products.

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Electron transport of chemically treated graphene quantum dots-based dye-sensitized solar cells

Mahalingam

Manap

Rabeya

et al. 2023

Electrochimica Acta

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Hydrothermal functionalization of graphene quantum dots extracted from cellulose

Cited by 3 publications

References 34 publications

Hydrothermal Treatment of Biomass Feedstocks for Sustainable Production of Chemicals, Fuels, and Materials: Progress and Perspectives

Hydrothermal Treatment of Biomass Feedstocks for Sustainable Production of Chemicals, Fuels, and Materials: Progress and Perspectives

Sustainable Preparation of Graphene Quantum Dots from Leaves of Date Palm Tree

Electron transport of chemically treated graphene quantum dots-based dye-sensitized solar cells

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