One Pot Hydrothermal Synthesis and Application of Bright-yellow-emissive Carbon Quantum Dots in Hg2+ Detection

Jaison, Ann Mary Chakkola; Vasudevan, Devipriya; Ponmudi, Keerthana; George, Ashlay; Varghese, Anitha

doi:10.1007/s10895-023-03233-z

Cited by 7 publications

(2 citation statements)

References 51 publications

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“…The respective XRD patterns of CQDs show a single broad diffraction peak at 2 θ = 22.15° for the (002) plane. The value obtained for CQDs is consistent with the values in the literature, which are in the range of 20–25° 42–44 . HRTEM measurements were used to view the morphological structures of the CQDs.…”

Section: Resultssupporting

confidence: 88%

Green synthesis capacitor of carbon quantum dots from Stachys euadenia

Baslak,

Demirel,

Dogu

et al. 2024

Env Prog and Sustain Energy

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Carbon quantum dots (CQDs) are a new type of carbon nanomaterial that has recently attracted great attention as a potential competitor to standard semiconductor quantum dots. There are various ways to synthesis CQDs, and one of harmless way is undoubtedly green synthesis. In this study, hydrothermal synthesis based on the green way was employed to synthesize CQDs. The CQDs were obtained using the green leaves of the Stachys euadenia plant extract, an endemic species located in Turkey. The CQDs were characterized by fluorescent and UV‐Visible spectroscopy, and results confirmed blue emission (430–480 nm) and absorption around 280 nm. X‐ray photoelectron spectroscopy (XPS) analysis revealed C=C, C–N and C–O interactions. X‐ray diffractometer (XRD) patterns confirmed structure of carbon with a broad peak of (002) plane. High resolution tunneling electron microscopy (HRTEM) and dynamic light scattering (DLS) analysis was used to determine the shape and size of CQDs. The CQDs obtained from Stachys euadenia were employed as electrode materials for capacitor application, and they were tested in Swagelok‐type cell by cyclic voltammetry (CV) measurements. CQD capacitors exhibited 2.12 F/g charge and 1.24 F/g discharge capacitances were obtained with ~58% coulombic efficiency rate for the first cycle. Results highlights that CQDs are synthesized successfully by green synthesis method and can be used for capacitor applications.

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Section: Resultssupporting

confidence: 88%

Green synthesis capacitor of carbon quantum dots from Stachys euadenia

Baslak,

Demirel,

Dogu

et al. 2024

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…This phenomenon may be due to the different sizes of carbon dot particles and the presence of surface defects. 54 Since the maximum emission peak was recorded at the fluorescence excitation wavelength of 360 nm, subsequent experiments were thus conducted at the optimum excitation wavelength of 360 nm. By using quinine sulfate in 0.1 mol L À1 H 2 SO 4 as the reference, the quantum yield of the synthesized NCDs at 360 nm was determined to be approximately 15.1%.…”

Section: Optical Properties Of Ncdsmentioning

confidence: 99%