Heteroatom (boron, nitrogen, and fluorine) quantum dot-doped polyaniline-photoactive film preparation and characterization for organic solar cell applications

Shanmugasundaram, Esakkimuthu; Ganesan, Vigneshkumar; Narayanan, Vimalasruthi; Vellaisamy, Kannan; Rajamohan, R.; Lee, Yong Rok; Selvam, K.; Stalin, T.

doi:10.1039/d3nj02435k

Cited by 7 publications

(1 citation statement)

References 60 publications

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“…The band gap analysis is a crucial tool for understanding the photocatalytic mechanism of prepared materials. The band gap is calculated using Tauc plot (eq ). α false( h υ false) = A × false( h υ − E g ) n / 2 αabsorption coefficient, h Planck’s constant, t light frequency, A constant’s value, E g bandgap energy, and n number of transitions in the semiconductor.…”

Section: Resultsmentioning

confidence: 99%

Dual Applications of Cobalt-Oxide-Grafted Carbon Quantum Dot Nanocomposite for Two Electrode Asymmetric Supercapacitors and Photocatalytic Behavior

Shanmugasundaram,

Vellaisamy,

Ganesan

et al. 2024

ACS Omega

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Carbon materials, such as graphene, carbon nanotubes, and quantum-dot-doped metal oxides, are highly attractive for energy storage and environmental applications. This is due to their large surface area and efficient optical and electrochemical activity. In this particular study, a composite material of cobalt oxide and carbon quantum dots (Co 3 O 4 − CQD) was prepared using cobalt nitrate and ascorbic acid (carbon source) through a simple one-pot hydrothermal method. The properties of the composite material, including the functional groups, composition, surface area, and surface morphology, were evaluated by using various methods such as ultraviolet, Fourier transform infrared, X-ray diffraction, Raman, X-ray photoelectron spectroscopy, Brunauer−Emmett−Teller, scanning electron microscopy, and transmission electron microscopy analysis. The electrochemical performance of the Co 3 O 4 −CQD composite has been studied using a three-electrode system. The results show that at 1 A g −1 , the composite delivers a higher capacitance of 1209 F g −1 . The asymmetric supercapacitor (Co 3 O 4 −CQD//AC) provided 13.88 W h kg −1 energy and 684.65 W kg −1 power density with a 96% capacitance retention. The Co 3 O 4 −CQD composite also demonstrated excellent photocatalytic activity (90% in 60 min) for the degradation of methylene blue dye under UV irradiation, which is higher than that of pristine Co 3 O 4 and CQD. This demonstrates that the Co 3 O 4 −CQD composite is a promising material for commercial energy storage and environmental applications.

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Section: Resultsmentioning

confidence: 99%

Dual Applications of Cobalt-Oxide-Grafted Carbon Quantum Dot Nanocomposite for Two Electrode Asymmetric Supercapacitors and Photocatalytic Behavior

Shanmugasundaram,

Vellaisamy,

Ganesan

et al. 2024

ACS Omega

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Microwave irradiation effect of La2O3-CeO2 nanocomposites as a potential electrode material for asymmetric supercapacitor

Riyas,

Prabhu

2024

Ionics

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One-pot Microwave Synthesis of Cobalt, Nitrogen, and Sulfur Co-Doped Carbon Quantum Dots for Efficient Monosodium Glutamate Determination in Food Samples

Hamid,

Elagamy,

Gamal

et al. 2024

Food Anal. Methods

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The synthesis of cobalt, nitrogen and sulfur co doped carbon quantum dots (Co-NS-CQDs) has become a subject of significant research interest. These CQDs were produced using a single-step microwave method, which is considered environmentally friendly, and the entire process was completed in just 90 seconds. In this synthesis, citric acid was utilized as the carbon source, methionine served as the source for both nitrogen and sulfur, and cobaltous acetate was used to introduce cobalt ions into the CQDs structure. The synthesized carbon quantum dots (CQDs) exhibit a narrow size distribution and a high quantum yield of 51.5%, which is notably superior to non-metal-doped CQDs with a yield of 38%. Characterization of these CQDs was performed using different techniques such as transmission electron microscopy (TEM), high-resolution TEM (HRTEM), Fourier transformation infrared spectroscopy (FTIR), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The developed CQDs have blue luminescence at emission wavelength 438 nm after excitation at 350 nm. Different factors affecting the CQDs synthesis including dialysis duration, reaction time and reaction temperature. These CQDs were utilized as a probe for the detection of monosodium glutamate (MSG) in various food products. The intensity of the fluorescence of the CQDs showed a direct and linear increase with the concentration of MSG within the range of 25–250 µg/mL. The detection and quantitation limits for MSG were 2.78 µg/mL and 8.44 µg/mL, respectively. Additionally, the developed method is environmentally friendly, as confirmed by assessments using the analytical Eco scale, Green Analytical Procedure Index (GAPI), and Analytical Greenness calculator (Agree). The proposed method presents several advantages over other reported methods in terms of convenience, rapid response, and attainment of accurate and precise results.

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Heteroatom (boron, nitrogen, and fluorine) quantum dot-doped polyaniline-photoactive film preparation and characterization for organic solar cell applications

Abstract: Carbon quantum dots (CQDs) play a significant role in various applications, such as solar cells, bio-imaging, batteries, sensing, and therapy, thanks to their outstanding optical and electrical properties.

Cited by 7 publications

References 60 publications

Dual Applications of Cobalt-Oxide-Grafted Carbon Quantum Dot Nanocomposite for Two Electrode Asymmetric Supercapacitors and Photocatalytic Behavior

Dual Applications of Cobalt-Oxide-Grafted Carbon Quantum Dot Nanocomposite for Two Electrode Asymmetric Supercapacitors and Photocatalytic Behavior

Microwave irradiation effect of La2O3-CeO2 nanocomposites as a potential electrode material for asymmetric supercapacitor

One-pot Microwave Synthesis of Cobalt, Nitrogen, and Sulfur Co-Doped Carbon Quantum Dots for Efficient Monosodium Glutamate Determination in Food Samples

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