Blue-emitting fluorescent carbon quantum dots from waste biomass sources and their application in fluoride ion detection in water

Boruah, Anusuya; Saikia, Monikankana; Das, Tonkeswar; Goswamee, Rajib Lochan; Saikia, Binoy K.

doi:10.1016/j.jphotobiol.2020.111940

Cited by 117 publications

(47 citation statements)

References 58 publications

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“…Therefore, the C-dots synthesized from cucumber peels have greater application potential in fields of organic electronics and bioimaging. Boruah [95] also found that C-dots prepared from sugarcane bagasse, garlic peels, and taro peels by the same synthetic method had quite different quantum yields (i.e., 4.5%, 13.8% and 26.2%, respectively) and physicochemical properties.…”

Section: The Impact Of Raw Materialsmentioning

confidence: 97%

A Review of Carbon Dots Produced from Biomass Wastes

et al. 2020

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The fluorescent carbon dot is a novel type of carbon nanomaterial. In comparison with semiconductor quantum dots and fluorescence organic agents, it possesses significant advantages such as excellent photostability and biocompatibility, low cytotoxicity and easy surface functionalization, which endow it a wide application prospect in fields of bioimaging, chemical sensing, environmental monitoring, disease diagnosis and photocatalysis as well. Biomass waste is a good choice for the production of carbon dots owing to its abundance, wide availability, eco-friendly nature and a source of low cost renewable raw materials such as cellulose, hemicellulose, lignin, carbohydrates and proteins, etc. This paper reviews the main sources of biomass waste, the feasibility and superiority of adopting biomass waste as a carbon source for the synthesis of carbon dots, the synthetic approaches of carbon dots from biomass waste and their applications. The advantages and deficiencies of carbon dots from biomass waste and the major influencing factors on their photoluminescence characteristics are summarized and discussed. The challenges and perspectives in the synthesis of carbon dots from biomass wastes are also briefly outlined.

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Section: The Impact Of Raw Materialsmentioning

confidence: 97%

A Review of Carbon Dots Produced from Biomass Wastes

et al. 2020

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“…Nitrogen doping of CQDs has been widely applied for the efficient properties enhancement of CQDs [72]. An interesting example of CQDs preparation from waste material was presented by Boruah et al [71] using taro peel as a carbon source. The CQDs were prepared by H 2 O 2 chemical treatment of taro peel, followed by ultrasonication for 3-4 h. The obtained nanoparticles of size 8-12 nm, containing more oxygen functional groups on the surface and with high QY = 26.20%, were estimated to be a promising nanoprobe for the fluoride (F − ) ion detection in water samples.…”

Section: Cqds Preparation From Natural Sourcesmentioning

confidence: 99%

An Overview of the Recent Developments in Carbon Quantum Dots—Promising Nanomaterials for Metal Ion Detection and (Bio)Molecule Sensing

et al. 2021

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The fluorescent carbon quantum dots (CQDs) represent an emerging subset of carbonaceous nanomaterials, recently becoming a powerful tool for biosensing, bioimaging, and drug and gene delivery. In general, carbon dots are defined as zero-dimensional (0D), spherical-like nanoparticles with <10 nm in size. Their unique chemical, optical, and electronic properties make CQDs versatile materials for a wide spectrum of applications, mainly for the sensing and biomedical purposes. Due to their good biocompatibility, water solubility, and relatively facile modification, these novel materials have attracted tremendous interest in recent years, which is especially important for nanotechnology and nanoscience expertise. The preparation of the biomass-derived CQDs has attracted growing interest recently due to their low-cost, renewable, and green biomass resources, presenting also the variability of possible modification for the enhancement of CQDs’ properties. This review is primarily focused on the recent developments in carbon dots and their application in the sensing of different chemical species within the last five years. Furthermore, special emphasis has been made regarding the green approaches for obtaining CQDs and nanomaterial characterization toward better understanding the mechanisms of photoluminescent behavior and sensing performance. In addition, some of the challenges and future outlooks in CQDs research have been briefly outlined.

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“…Carbon quantum do (CQDs) have attracted much attention in many applications because of their advantage such as water solubility, fluorescence, low toxicity, cheap scale-up production, abundan and ease of modification [35]. CQDs can be prepared from different carbon sources, su as food waste [36], waste biomass sources [37], corncobs [38] and weak organic acids [39 Carbon dots are typically prepared via chemical methods and physical methods. Chem cal methods include electrochemical synthesis, combustion/thermal/hydrothermal/acid oxidation, supported synthesis, microwave/ultrasonic and solution chemistry method Physical methods include arc discharge, laser ablation/passivation and plasma treatme [40,41].…”

Section: Carbon Quantum Dotsmentioning

confidence: 99%

Synthetic Approaches, Modification Strategies and the Application of Quantum Dots in the Sensing of Priority Pollutants

Maluleke

Oluwafemi

2021

Applied Sciences

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Polycyclic aromatic hydrocarbons (PAHs) and nitro-aromatic compounds (NACs) are two classifications of environmental pollutants that have become a source of health concerns. As a result, there have been several efforts towards the development of analytical methods that are efficient and affordable that can sense these pollutants. In recent decades, a wide range of techniques has been developed for the detection of pollutants present in the environment. Among these different techniques, the use of semiconductor nanomaterials, also known as quantum dots, has continued to gain more attention in sensing because of the optical properties that make them useful in the identification and differentiation of pollutants in water bodies. Reported studies have shown great improvement in the sensing of these pollutants. This review article starts with an introduction on two types of organic pollutants, namely polycyclic aromatic hydrocarbons and nitro-aromatic explosives. This is then followed by different quantum dots used in sensing applications. Then, a detailed discussion on different groups of quantum dots, such as carbon-based quantum dots, binary and ternary quantum dots and quantum dot composites, and their application in the sensing of organic pollutants is presented. Different studies on the comparison of water-soluble quantum dots and organic-soluble quantum dots of a fluorescence sensing mechanism are reviewed. Then, different approaches on the improvement of their sensitivity and selectivity in addition to challenges associated with some of these approaches are also discussed. The review is concluded by looking at different mechanisms in the sensing of polycyclic aromatic hydrocarbons and nitro-aromatic compounds.

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Blue-emitting fluorescent carbon quantum dots from waste biomass sources and their application in fluoride ion detection in water

Cited by 117 publications

References 58 publications

A Review of Carbon Dots Produced from Biomass Wastes

A Review of Carbon Dots Produced from Biomass Wastes

An Overview of the Recent Developments in Carbon Quantum Dots—Promising Nanomaterials for Metal Ion Detection and (Bio)Molecule Sensing

Synthetic Approaches, Modification Strategies and the Application of Quantum Dots in the Sensing of Priority Pollutants

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