Synthesis of carbon quantum dots with green luminescence from potato starch

Qiang, Ruibin; Yang, Shengrong; Hou, Kaiming; Wang, Jinqing

doi:10.1039/c9nj02291k

Cited by 89 publications

(43 citation statements)

References 40 publications

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“…The broad diffraction peak at 2 θ = (22.28 ± 0.43)° corresponds to the (002) plane, demonstrating the amorphous nature of synthesized CQDs. The broader interlayer spacing of (0.40 ± 0.01) nm compared to 0.34 nm of graphite also indicates the amorphous nature and low crystallinity of CQDs caused by the surface functionalization [ 31 ]. The low-density peak at 2 θ = (43.30 ± 0.22)° corresponds to the (100) plane, also indicating the presence of graphitic carbon [ 8 , 32 , 33 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Multifunctional N-Doped Carbon Quantum Dots from Citrus clementina Peel: Investigating Targeted Pharmacological Activities and the Potential Application for Fe3+ Sensing

et al. 2021

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Carbon quantum dots (CQDs) have recently emerged as innovative theranostic nanomaterials, enabling fast and effective diagnosis and treatment. In this study, a facile hydrothermal approach for N-doped biomass-derived CQDs preparation from Citrus clementina peel and amino acids glycine (Gly) and arginine (Arg) has been presented. The gradual increase in the N-dopant (amino acids) nitrogen content increased the quantum yield of synthesized CQDs. The prepared CQDs exhibited good biocompatibility, stability in aqueous, and high ionic strength media, similar optical properties, while differences were observed regarding the structural and chemical diversity, and biological and antioxidant activity. The antiproliferative effect of CQD@Gly against pancreatic cancer cell lines (CFPAC-1) was observed. At the same time, CQD@Arg has demonstrated the highest quantum yield and antioxidant activity by DPPH scavenging radical method of 81.39 ± 0.39% and has been further used for the ion sensing and cellular imaging of cancer cells. The obtained results have demonstrated selective response toward Fe3+ detection, with linear response ranging from 7.0 µmol dm−3 to 50.0 µmol dm−3 with R2 = 0.9931 and limit of detection (LOD) of 4.57 ± 0.27 µmol dm−3. This research could be a good example of sustainable biomass waste utilization with potential for biomedical analysis and ion sensing applications.

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Section: Resultsmentioning

confidence: 99%

Preparation of Multifunctional N-Doped Carbon Quantum Dots from Citrus clementina Peel: Investigating Targeted Pharmacological Activities and the Potential Application for Fe3+ Sensing

et al. 2021

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“…CQDs of the size 3–5 nm are prepared from potato starch via hydrochloric acid assisted ultrasonic route. These CQDs have a large amount of suborbicular nano‐dots 244.…”

Section: Synthesis Of Biomass‐derived Carbon Quantum Dots (Bcqds)mentioning

confidence: 99%

Biomass‐derived Carbon Quantum Dots – A Review. Part 1: Preparation and Characterization

et al. 2021

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The preparation of nanostructured carbon materials from chosen biomass through hydrothermal carbonization and pyrolysis processes by optimizing the reaction conditions is one of the bases for applying the product in certain of the development activities. The finished product more or less reflects the raw material and the way of preparation. Among the many products, carbon quantum dots (CQDs) have gained importance due to their bolstered characteristics and facile preparation. CQDs are zero‐dimensional (0D) nanomaterials which attracted attention in the recent past due to their excellent water solubility, unique optical properties, good electrical conductivity, eco‐friendliness, and biocompatibility. Small‐sized CQDs offer high surface area per unit volume, strong tunable fluorescence, photo‐luminescent emissions, and semiconducting properties. In this paper, identification of ideal raw materials, process parameters being followed in the preparation of CQDs through hydrothermal carbonization and pyrolysis techniques, and the properties of the resultant CQDs commensurate with the nature of process are reviewed.

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“…The preparation of CQDs from low-value biomass, such as by-products and wastes, could be an example of efficient conversion of low-value products into valuable materials with a wide spectrum of possible applications. The literature data have shown that biomass has been widely used for the synthesis of efficient CQDs such as tomato [53,54], potato [55], expired milk [56] (Figure 2), and different plant material (Table 2); however, recently, the preparation of CQDs from waste of different origin (agricultural, industrial, domestic) covers more of this research topic and focuses also on the important concerns regarding the environmental impact and efficient waste management. It is interesting that biomass-derived CQDs can be used to detect metal ions and some molecules, and some selected examples are shown in Table 2.…”

Section: Cqds Preparation From Natural Sourcesmentioning

confidence: 99%

“…When describing CQDs, the scientists usually define CQDs as nanoparticles of diameter approximately of 10 nm, and this is definitely reported in different literature employing transmission electron microscopy (TEM) [53][54][55]. Another common characteristic of the CQDs is their monodisperse and relatively narrow size distribution, with spherical or quasi-spherical morphology and particle shape [11,75,78].…”

Section: Structural and Chemical Propertiesmentioning

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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Synthesis of carbon quantum dots with green luminescence from potato starch

Abstract: Water-soluble carbon quantum dots (CQDs) are synthesized via an acid assisted ultrasonic route using the biomass carbon precursor of potato starch as the raw material.

Cited by 89 publications

References 40 publications

Preparation of Multifunctional N-Doped Carbon Quantum Dots from Citrus clementina Peel: Investigating Targeted Pharmacological Activities and the Potential Application for Fe3+ Sensing

Preparation of Multifunctional N-Doped Carbon Quantum Dots from Citrus clementina Peel: Investigating Targeted Pharmacological Activities and the Potential Application for Fe3+ Sensing

Biomass‐derived Carbon Quantum Dots – A Review. Part 1: Preparation and Characterization

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

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