Green synthesis of carbon quantum dots from purslane leaves for the detection of formaldehyde using quartz crystal microbalance

Amer, Wael A.; Rehab, Ahmed; Abdelghafar, Mona E.; Torad, Nagy L.; Atlam, Ahmed S.; Ayad, Mohamad M.

doi:10.1016/j.carbon.2021.03.047

Cited by 56 publications

(21 citation statements)

References 78 publications

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“…Modified QCM electrodes were exposed to volatile HCOOH, and time-dependent Δ F was recorded at different injected concentrations of 10–100 ppm. The application of the QCM technique to study the adsorption and diffusion of gases/vapors and VOCs into nanoflakes has been the subject of several recent reports. , Initially, our experiments were conducted using samples of colloidal Ph-g-C 3 N 4 nanoflakes and the corresponding bulk material to evaluate the gas sensitivity and selectivity of colloidal Ph-g-C 3 N 4 nanoflakes toward vapor-phase acidic molecules. It was found that the nanoflakes having a high nitrogen content and terminating-phenyl groups exhibit a distinguished sensing performance for acidic molecules (Figure S9).…”

Section: Resultsmentioning

confidence: 99%

Phenyl-Modified Carbon Nitride Quantum Nanoflakes for Ultra-Highly Selective Sensing of Formic Acid: A Combined Experimental by QCM and Density Functional Theory Study

Torad

El-Hosainy

Esmat

et al. 2021

ACS Appl. Mater. Interfaces

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Formic acid (HCOOH) is an important intermediate in chemical synthesis, pharmaceuticals, the food industry, and leather tanning and is considered to be an effective hydrogen storage molecule. Direct contact with its vapor and its inhalation lead to burns, nerve injury, and dermatosis. Thus, it is critical to establish efficient sensing materials and devices for the rapid detection of HCOOH. In the present study, we introduce a chemical sensor based on a quartz crystal microbalance (QCM) sensor capable of detecting trace amounts of HCOOH. This sensor is composed of colloidal phenyl-terminated carbon nitride (Ph-g-C3N4) quantum nanoflakes prepared using a facile solid-state method involving the supramolecular preorganization technology. In contrast to other synthetic methods of modified carbon nitride materials, this approach requires no hard templates, hazardous chemicals, or hydrothermal treatments. Comprehensive characterization and density functional theory (DFT) calculations revealed that the QCM sensor designed and prepared here exhibits enhanced detection sensitivity and selectivity for volatile HCOOH, which originates from chemical and hydrogen-bonding interactions between HCOOH and the surface of Ph-g-C3N4. According to DFT results, HCOOH is located close to the cavity of the Ph-g-C3N4 unit, with bonding to graphitic carbon and pyridinic nitrogen atoms of the nanoflake. The sensitivity of the Ph-g-C3N4-nanoflake-based QCM sensor was found to be the highest (128.99 Hz ppm–1) of the substances studied, with a limit of detection (LOD) of HCOOH down to a sub-ppm level of 80 ppb. This sensing technology based on phenyl-terminated attached-g-C3N4 nanoflakes establishes a simple, low-cost solution to improve the performance of QCM sensors for the effective discrimination of HCOOH, HCHO, and CH3COOH vapors using smart electronic noses.

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Section: Resultsmentioning

confidence: 99%

Phenyl-Modified Carbon Nitride Quantum Nanoflakes for Ultra-Highly Selective Sensing of Formic Acid: A Combined Experimental by QCM and Density Functional Theory Study

Torad

El-Hosainy

Esmat

et al. 2021

ACS Appl. Mater. Interfaces

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“…Absorption peaks in 1628 cm −1 are related to aromatic ring stretching C C [64] , [65] . The three bands at 1386 and 1115 cm −1 could be attributed to the C O and C-OH groups, respectively [66] , [67] , [68] , [69] . For BaMoO 4 /ZnO nanocomposites, the peaks at 3430 and 1628 cm −1 indicate the symmetric-antisymmetric stretching vibrations and bending of the water molecules adsorbed on the material surface, which is derived from moisture [70] , [71] .…”

Section: Resultsmentioning

confidence: 98%

Sonochemical synthesized BaMoO4/ZnO nanocomposites as electrode materials: A comparative study on GO and GQD employed in hydrogen storage

Karkeh-Abadi

Ghiyasiyan-Arani²,

Salavati‐Niasari³

2022

Ultrasonics Sonochemistry

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“…[8][9][10][11] Carbon quantum dots (CQDs) are environmentally friendly fluorescent materials with high quantum yield, good biocompatibility, high stability, and excellent solubility in water. 12 CQDs have been used in drug detection, 13 bioimaging, 14 drug transportation, 15 photoelectric catalysis, 16 photodegradation 17 and light-emitting diodes. 18 The synthetic methods of CQDs can be summarized briefly as ''top-down'' and ''bottom-up''.…”

Section: Introductionmentioning

confidence: 99%

Moxifloxacin detection based on fluorescence resonance energy transfer from carbon quantum dots to moxifloxacin using a ratiometric fluorescence probe

Zhang

Sun

et al. 2022

New J. Chem.

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Green synthesis of carbon quantum dots from purslane leaves for the detection of formaldehyde using quartz crystal microbalance

Cited by 56 publications

References 78 publications

Phenyl-Modified Carbon Nitride Quantum Nanoflakes for Ultra-Highly Selective Sensing of Formic Acid: A Combined Experimental by QCM and Density Functional Theory Study

Phenyl-Modified Carbon Nitride Quantum Nanoflakes for Ultra-Highly Selective Sensing of Formic Acid: A Combined Experimental by QCM and Density Functional Theory Study

Sonochemical synthesized BaMoO4/ZnO nanocomposites as electrode materials: A comparative study on GO and GQD employed in hydrogen storage

Moxifloxacin detection based on fluorescence resonance energy transfer from carbon quantum dots to moxifloxacin using a ratiometric fluorescence probe

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