A study on thermal degradation of zinc oxide nanopowders functionalized with anthocyanins, in correlation with their properties and applications

Dumbravă, Anca; Berger, Daniela; Prodan, G.; Badea, Mihaela; Olar, Rodica; Moscalu, Florin; Diacon, Aurel

doi:10.1007/s00339-018-2227-8

Cited by 6 publications

(4 citation statements)

References 49 publications

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“…44,45 The presence of residual acetate in zinc binary compounds obtained from zinc acetate precursors was reported by other studies. 46 In all spectra, the broad absorption band in the range of 3200-3600 cm −1 demonstrated the presence of -OH groups, most probably associated by hydrogen bonding. 44,45 Properties of ZnO nanopowders.-UV-vis diffuse reflectance spectroscopy was performed to study the optical properties of ZnO nanoparticles.…”

Section: Resultsmentioning

confidence: 85%

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Influence of Synthesis Route on the Structure and Properties of Zinc Oxide Nanoparticles Functionalized with Anthocyanins from Raw Vegetable Extracts

Dumbravă

Berger

Prodan

et al. 2017

ECS J. Solid State Sci. Technol.

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Blue zinc oxide nanopowders functionalized with anthocyanins from red cabbage were obtained by using two synthesis routes, i.e. one-pot synthesis and sensitization of white ZnO nanopowder. The structure and properties (optical, photocatalytic) of functionalized zinc oxide nanopowders where determined by XRD, SEM, TEM, HRTEM, electron diffraction, specific surface area analysis, FTIR, UV-Vis and PL spectroscopy, and compared with those of pristine zinc oxide nanopowder, obtained in similar conditions. A detailed structural study of nanoparticles (cell parameters, lattice strain, and crystallite size) was performed on the basis of electron diffraction data. The functionalized zinc oxide nanoparticles obtained by one-pot method present smaller particles size and different morphology in comparison with the other zinc oxide samples, exhibiting also the highest specific surface area and best photocatalytic activity in the discoloration of a Congo red solution (88.1%, after 120 min).

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Section: Resultsmentioning

confidence: 85%

“…As a consequence, the particle size for a sample can be determined from the bandgap values, in the effective mass approximation, using Brus formula. 46,51 Supposing a spherical shape, we calculated the particle diameter from the blueshift of the bang gap values:…”

Section: Resultsmentioning

confidence: 99%

Influence of Synthesis Route on the Structure and Properties of Zinc Oxide Nanoparticles Functionalized with Anthocyanins from Raw Vegetable Extracts

Dumbravă

Berger

Prodan

et al. 2017

ECS J. Solid State Sci. Technol.

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“…In our case, these peaks are registered at different values for both doped and undoped photocatalysts probably due to the synthesis method of our material and consequently to the morphology of our samples. Thus, the peak registered at 395 nm corresponds to the UV emission region (low near band edge – NBE) 49 associated with the recombination of an electron and a hole in the valence band of ZnO, while the peak from 466 nm visible region is attributed to the transition of an electron from the conduction band to oxygen related defects in ZnO 50 .…”

Section: Resultsmentioning

confidence: 99%

“…The photocatalytic properties of our samples can be connected with the band gap energies that were determined by UV-VIS reflectance analysis and estimated from Tauc equation 50 ( plots are detailed in Supplementary Information – Fig. S1, respectively S2).…”

Section: Resultsmentioning

confidence: 99%

New carbon/ZnO/Li2O nanocomposites with enhanced photocatalytic activity

Diacon

Mocanu

Raducanu

et al. 2019

Sci Rep

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Our study was focused on the synthesis of photocatalytic materials for the degradation of organic dyes based on the valorization of biomass resources. The biochar resulted from pyrolysis process of cherry pits wastes was activated by CO2 flow. Activated and inactivated carbon was used to obtain carbon-based photocatalysts impregnated with different zinc salt precursors. The activation of carbon had no significant influence on the photodegradation process. The doping procedure used Li2CO3 and Zn(CH3COO)2 of different concentrations to impregnate the biochar. The carbon-ZnO-Li2O based nanomaterials were analysed by TEM and SEM, while the presence of hexagonal wurtzite ZnO was investigated by XRD. The solid samples were analysed by PL at 360 nm excitation fixed wavelength to correlate their morphology with the optical and photocatalytic properties. The presence of Li atoms led to photocatalytic activities of the doped ZnO similar to the undoped ZnO obtained at higher concentrations of zinc acetate precursor.

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New Composite Nanomaterials with Antimicrobial and Photocatalytic Properties Based on Silver and Zinc Oxide

Dumbravă

Berger

Matei

et al. 2019

J Inorg Organomet Polym

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A study on thermal degradation of zinc oxide nanopowders functionalized with anthocyanins, in correlation with their properties and applications

Cited by 6 publications

References 49 publications

Influence of Synthesis Route on the Structure and Properties of Zinc Oxide Nanoparticles Functionalized with Anthocyanins from Raw Vegetable Extracts

Influence of Synthesis Route on the Structure and Properties of Zinc Oxide Nanoparticles Functionalized with Anthocyanins from Raw Vegetable Extracts

New carbon/ZnO/Li2O nanocomposites with enhanced photocatalytic activity

New Composite Nanomaterials with Antimicrobial and Photocatalytic Properties Based on Silver and Zinc Oxide

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