Microwave-assisted green synthesis of multi-functional carbon quantum dots as efficient fluorescence sensor for ultra-trace level monitoring of ammonia in environmental water

Ganesan, Sivarasan; Rajendran, Kalimuthu; Kanagaraj, Thamaraiselvi; Ravichandran, K.; Rajendiran, Nagappan; Pragasan, L. Arul; Ponnusamy, Vinoth Kumar

doi:10.1016/j.envres.2021.112589

Cited by 41 publications

(10 citation statements)

References 48 publications

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“…QDs have been created via microwave irradiation, similarly done in this work, which causes polymerization and carbonization. Carbon compounds absorb electromagnetic energy during the microwave irradiation process and transform it into heat energy [30,31]. Because of its quick response time and short duration, microwave irradiation is a useful technique.…”

Section: Previous Studies On Fabrication Methodsmentioning

confidence: 99%

Synthesis, characterization, photoluminescent properties of carbon quantum dots and its applications in wastewater treatment

Nizam

Hanafiah

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Carbon-based nanomaterials are currently gaining attention in wastewater treatment. They have gained a prime position in membrane filtration to degrade pollutants. One of the most recent additions to the field of carbon-based nanomaterials is quantum dots (QDs). Due to their exceptional qualities, QDs are among the most promising carbon-based nanomaterials at the forefront of the wastewater treatment research field. Nonetheless, most quantum dots were not sustainably fabricated. Therefore, this study aims to evaluate the carbon-based carbon quantum dots derived from biomass wastes (rubber seed shells) where the properties, behaviour and photoluminescence characteristics were evaluated through several characterization analyses. The QDs were characterized using Fourier-transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), field emission scanning electron microscope (FESEM) equipped with energy-dispersive X-ray spectroscopy (EDX), photoluminescence spectroscopy, zeta potential analyser and Raman spectroscopy. The morphological analysis revealed multi-layered planes with highly porous and uneven surfaces, consisting of a large number of oxygen-functional groups (hydroxyl, carboxyl, carbonyl). The mapping results showed a large uniform distribution of carbon and oxygen elements on the surface of QDs with a more signified composition of wt% carbon (72.4%) compared to oxygen elements, with 23.6%. The spectroscopic and photoluminescence studies confirmed the fabrication of high-quality carbon quantum dots with blue-greenish fluorescence emissions. These results have shown promising biomass-based QDs that can be applied in wastewater treatment based on their unique characteristics. Thus, the derived biomass-based QDs can be viewed as a promising and cost-effective adsorbent for wastewater and water treatment.

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Section: Previous Studies On Fabrication Methodsmentioning

confidence: 99%

Synthesis, characterization, photoluminescent properties of carbon quantum dots and its applications in wastewater treatment

Nizam

Hanafiah

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…S1 (ESI †) shows that the I-CQDs carry a negative charge with a zeta potential of À11.8 mV, indicating that there are a large number of carboxyl functional groups, which is consistent with the results of FT-IR analysis. 36 XPS analysis of the I-CQDs showed five typical peaks at 629.8, 618.3, 532.0, 284.8, and 49.1 eV, corresponding to the characteristic I 3d3 , I 3d5 , O 1s , C 1s , and I 4d signals, respectively (Fig. 2B).…”

Section: Characterization Of I-cqdsmentioning

confidence: 99%

Self-doping synthesis of iodine–carbon quantum dots for sensitive detection of Fe(iii) and cellular imaging

Luo

et al. 2022

New J. Chem.

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“…They showed that this graphene detects organic pollutants such as bisphenol A, 1‐napthol, phenol, and picric acid using a “turn‐on” fluorescence approach (Figure 3D). In addition, there are a few reports that the fluorescence sensors detect ammonia gas in the air 63,64 . Recently, Yue et al reported the bioaerosol‐based light‐induced fluorescence (LIF) method for real monitoring of air conditions 65 .…”

Section: Optical Sensor Designmentioning

confidence: 99%

Sensor design strategy for environmental and biological monitoring

Heo

Sung

Trung

et al. 2023

EcoMat

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Rapid industrial growth has severely impacted ecosystems and aggravated economic and health risks to society. Monitoring of ecosystems is fundamental to our understanding of how ecosystem change impacts resources and is critical for developing data-based sustainability. Thus, the design and development of optimized sensors for ecosystem monitoring have received increasing attention.This review provides a comprehensive overview of systematic sensor design strategies for ecosystem monitoring from the material level to the form factor level. We discuss the fundamental transducing mechanisms of a representative sensor system including optical, electrical, and electrochemical sensors. We then review the sensor interfacing strategy for achieving stable and real-time monitoring of environmental biochemical factors from air, water, soil, and living organisms. Finally, we provide a summary of the current performance and prospects of this state-of-the-art sensor technology and an outlook on opportunities for possible future research directions in this emerging field.

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Microwave-assisted green synthesis of multi-functional carbon quantum dots as efficient fluorescence sensor for ultra-trace level monitoring of ammonia in environmental water

Cited by 41 publications

References 48 publications

Synthesis, characterization, photoluminescent properties of carbon quantum dots and its applications in wastewater treatment

Synthesis, characterization, photoluminescent properties of carbon quantum dots and its applications in wastewater treatment

Self-doping synthesis of iodine–carbon quantum dots for sensitive detection of Fe(iii) and cellular imaging

Sensor design strategy for environmental and biological monitoring

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