Enhanced photocatalytic activity of ZnO sensitized by carbon quantum dots and application in phenol wastewater

Liang, Huiqin; Tai, Xiumei; Du, Zhongjie; Yin, Yanji

doi:10.1016/j.optmat.2020.109674

Cited by 89 publications

(43 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FT-IR spectrum of pristine ZnO nanoparticles shows a strong peak at 437 cm -1 and 570 cm -1 corresponds to the metal-oxygen bonding between Zn and O atoms. In the case of ZnO/C nanocomposite, the FT-IR transmission peak corresponding to the metal-oxygen bonding is observed at 490 cm -1 , 541 cm -1 and 593 cm -1 [37]. In both the samples, the transmission peak was observed at 871 cm -1 , which corresponds to the formation of tetrahedral coordination of Zn atoms in the ZnO crystal structure [38].…”

Section: Functional Group Analysismentioning

confidence: 94%

See 1 more Smart Citation

Hydrothermal synthesis of ZnO/C microflowers for photocatalytic degradation of organic pollutants under visible light irradiation: kinetics, mechanism and recyclability

Shibu

Benoy²,

Shanavas

et al. 2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

We developed an improved hexagonal wurtzite ZnO and ZnO/C microflowers through the facile hydrothermal technique. The obtained nanostructures were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Energy-dispersive X-ray spectroscopy (EDX) and UV-visible diffuse reflectance spectroscopy (UV-Vis DRS). The formation of flower-like material is confirmed using SEM and TEM analysis with an average diameter of about 2 lm composed of several plate-like nanostructures. The optical analysis results show that the presence of carbon particles with ZnO structures has significantly increased the light absorption ability of nanocomposite. The photocatalytic degradation ability of prepared nanostructures was examined using methylene blue as a model pollutant. The obtained results show that the photocatalytic degradation ability of ZnO/C nanostructures is approximately two times higher than the pristine ZnO microflowers. Based on the investigation, an enhancement of the photocatalytic ability of ZnO/C nanocomposite is achieved due to the synergistic effect between carbon particles and flower-like ZnO nanostructures.

show abstract

Section: Functional Group Analysismentioning

confidence: 94%

“…The peaks observed at 1641 cm -1 correspond to the carbon-carbon bonding. The broad FT-IR transmission band observed at 3100 cm -1 to 3700 cm -1 corresponds to -OH bonding it is due to the physically and chemically adsorbed water molecules on the surface of nanostructures [37,39].…”

Section: Functional Group Analysismentioning

confidence: 99%

Hydrothermal synthesis of ZnO/C microflowers for photocatalytic degradation of organic pollutants under visible light irradiation: kinetics, mechanism and recyclability

Shibu

Benoy²,

Shanavas

et al. 2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

“…Liang et al prepared ZnO sensitized by carbon quantum dots (L-CQDs/ZnO) by a combination of L-CQDs and ZnO using the hydrothermal method ( Liang et al, 2020 ). Zinc oxide, ammonia water, and ammonium bicarbonate were mixed together, filtered, and stirred for 4 h. The supernatant was steamed at 90 ± 2°C, filtrated, washed, dried in a vacuum oven at 120 ± 2°C, and then annealed at 500 ± 2°C for 4 h to make ZnO.…”

Section: Photocatalytic Applications Of Cqdsmentioning

confidence: 99%

Recent Progress on Carbon Quantum Dots Based Photocatalysis

Jung

Sapner

Adhikari³

et al. 2022

Front. Chem.

View full text Add to dashboard Cite

show abstract

“…It can be seen in the Mott-Schottky plot that the E fb of ZnO was measured to be −0.46 eV (V vs. Ag/AgCl), which was consistent with the of −0.26 eV (V vs. NHE). As we all know, the E fb is approximately equal to the Fermi level (E F ), so, E fb ≈ E F ≈ −0.26 eV (V vs. NHE) [42]. The conduction band potential of n-type semiconductors is usually 0.2 eV less than the flat band potential [43].…”

Section: The Photocatalytic Activity Of Zno Nano-rod Arraysmentioning

confidence: 99%

ZnO Nano-Rod Arrays Synthesized with Exposed {0001} Facets and the Investigation of Photocatalytic Activity

et al. 2021

View full text Add to dashboard Cite

Zinc oxide (ZnO) possesses superior chemical and physical properties so that it can occupy an essential position in the application of nanostructures. In this paper, ZnO nano-rod arrays were synthesized by a simple one-step hydrothermal approach with the assistance of cetyl trimethyl ammonium bromide (CTAB). Exposure of the {0001} facets could be controlled by adjusting the amount of CTAB and the maximum exposure of the {0001} facets of ZnO nanorods is obtained at 1.2 g of CTAB. The photocurrent, EIS, and PL measurements support the facile charge transfer with minimum recombination of the photogenerated excitons of the ZnO nano-rod arrays obtained at 1.2 g of CTAB. Consequently, the obtained ZnO nano-rod arrays at the optimal CTAB of 1.2 g exhibit an excellent photocatalytic degradation rate of 99.7% for rhodamine B (RhB), while the degradation rate of RhB by the ZnO obtained without CTAB is only 35%.

show abstract

Enhanced photocatalytic activity of ZnO sensitized by carbon quantum dots and application in phenol wastewater

Cited by 89 publications

References 52 publications

Hydrothermal synthesis of ZnO/C microflowers for photocatalytic degradation of organic pollutants under visible light irradiation: kinetics, mechanism and recyclability

Hydrothermal synthesis of ZnO/C microflowers for photocatalytic degradation of organic pollutants under visible light irradiation: kinetics, mechanism and recyclability

Recent Progress on Carbon Quantum Dots Based Photocatalysis

ZnO Nano-Rod Arrays Synthesized with Exposed {0001} Facets and the Investigation of Photocatalytic Activity

Contact Info

Product

Resources

About