Nitrogen and bismuth-doped rice husk-derived carbon quantum dots for dye degradation and heavy metal removal

Hui, Khee Chung; Ang, Wei Lun; Sambudi, Nonni Soraya

doi:10.1016/j.jphotochem.2021.113411

Cited by 41 publications

(11 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Quantum yield (QY) was determined by the procedure reported by Hui et al (2021), using quinine sulfate in 0.1 M H 2 SO 4 ( η = 1.33, Φ = 0.54%) as the reference standard. 20,21 The QY of the carbon quantum dots was calculated using eqn (1):where Φ S and Φ R represent the quantum yields of sample and reference, respectively. ‘ A ’ is area under the emission curve and ‘ η ’ is the refractive index.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Facile synthesis of surface-functionalized fluorescent carbon quantum dots for the selective detection of ferric ions

Hijazi,

Ganie,

Rahman

et al. 2023

Environ. Sci.: Nano

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Quantum Yield Determinationmentioning

confidence: 99%

Facile synthesis of surface-functionalized fluorescent carbon quantum dots for the selective detection of ferric ions

Hijazi,

Ganie,

Rahman

et al. 2023

Environ. Sci.: Nano

View full text Add to dashboard Cite

show abstract

“…Additionally, the EDX mapping results showed that the dominating features on the surface of QDs were a broad uniform distribution of carbon and oxygen elements, showing that a more significant composition of wt% carbon with 72.4% compared to oxygen elements, with only 23.6%. Due to the increased propensity for more broken bonds to exist in the interfacial area, an adsorbent with an oxygen element content that is noticeably higher than average will increase in adsorption effectiveness [28,29]. The high proportion of oxygen atoms in the QDs caused it to be extensively oxidised, producing additional active sites on its surface.…”

Section: Characterizationmentioning

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.

View full text Add to dashboard Cite

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.

show abstract

“…For the doping of N and Bi, EDA with a volume ratio of 5 and 20 vol% and bismuth nitrate pentahydrate with a mass of 1 and 5 wt% were used. Following the various academic research for the synthesis of carbon quantum dots from rice husk, the hydrothermal temperature of 190 °C was chosen for synthesizing Bi-N-CQDs [ 46 ].…”

Section: Synthesis Techniques Of Mixed-doped Carbon Quantum Dotsmentioning

confidence: 99%

Recent Advancements in Metal and Non-Metal Mixed-Doped Carbon Quantum Dots: Synthesis and Emerging Potential Applications

et al. 2023

View full text Add to dashboard Cite

In nanotechnology, the synthesis of carbon quantum dots (CQDs) by mixed doping with metals and non-metals has emerged as an appealing path of investigation. This review offers comprehensive insights into the synthesis, properties, and emerging applications of mixed-doped CQDs, underlining their potential for revolutionary advancements in chemical sensing, biosensing, bioimaging, and, thereby, contributing to advancements in diagnostics, therapeutics, and the under standing of complex biological processes. This synergistic combination enhances their sensitivity and selectivity towards specific chemical analytes. The resulting CQDs exhibit remarkable fluorescence properties that can be involved in precise chemical sensing applications. These metal-modified CQDs show their ability in the selective and sensitive detection from Hg to Fe and Mn ions. By influencing their exceptional fluorescence properties, they enable precise detection and monitoring of biomolecules, such as uric acid, cholesterol, and many antibiotics. Moreover, when it comes to bioimaging, these doped CQDs show unique behavior towards detecting cell lines. Their ability to emit light across a wide spectrum enables high-resolution imaging with minimal background noise. We uncover their potential in visualizing different cancer cell lines, offering valuable insights into cancer research and diagnostics. In conclusion, the synthesis of mixed-doped CQDs opens the way for revolutionary advancements in chemical sensing, biosensing, and bioimaging. As we investigate deeper into this field, we unlock new possibilities for diagnostics, therapeutics, and understanding complex biological processes.

show abstract

Nitrogen and bismuth-doped rice husk-derived carbon quantum dots for dye degradation and heavy metal removal

Cited by 41 publications

References 54 publications

Facile synthesis of surface-functionalized fluorescent carbon quantum dots for the selective detection of ferric ions

Facile synthesis of surface-functionalized fluorescent carbon quantum dots for the selective detection of ferric ions

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

Recent Advancements in Metal and Non-Metal Mixed-Doped Carbon Quantum Dots: Synthesis and Emerging Potential Applications

Contact Info

Product

Resources

About