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2 article(s) from Anastasescu, Crina

Mn-doped ZnO nanopowders prepared by sol–gel and microwave-assisted sol–gel methods and their photocatalytic properties

Cristina Maria Vlăduț,
Crina Anastasescu,
Silviu Preda,
Oana Catalina Mocioiu,
Simona Petrescu,
Jeanina Pandele-Cusu,
Dana Culita,
Veronica Bratan,
Ioan Balint and
Maria Zaharescu

Beilstein J. Nanotechnol. 2024, 15, 1283–1296, doi:10.3762/bjnano.15.104

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Figure 1: FTIR spectra of as-prepared gels.

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Figure 2: DTA, DTG and TG curves for the as-prepared SG powder.

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Figure 3: DTA, DTG and TG curves for the as-prepared MW powder.

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Figure 4: SEM images for (a) SG sample and (b) MW sample.

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Figure 5: FTIR spectra of the thermally treated samples (SG and MW).

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Figure 6: XRD patterns of SG and MW powders, thermally treated at 500 °C, over (a) the full 2θ range and (b) ...

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Figure 7: N₂ adsorption–desorption isotherms and pore size distributions (inset of the figures) for the inves...

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Figure 8: Comparative UV–vis spectra of SG and MW; the inset illustrates the Tauc plot for SG and MW samples.

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Figure 9: Photoluminescence spectra of the powders suspended in water (SG and MW) collected for λ_exc = 270 nm....

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Figure 10: Quenching of catalyst photoluminescence with increasing oxalic acid concentrations in aqueous solut...

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Figure 11: Generation of hydroxyl radicals by (a) SG and (b) MW (b) catalysts. (c) Comparative emissions at 45...

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Figure 12: O₂⁻ formation over SG and MW powders under simulated solar irradiation.

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Figure 13: Photoactivity of the suspended catalyst powders for oxalic acid oxidation to CO₂ under simulated so...

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Full Research Paper

Published 28 Oct 2024

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Titania nanoparticles for photocatalytic degradation of ethanol under simulated solar light

Evghenii Goncearenco,
Iuliana P. Morjan,
Claudiu Teodor Fleaca,
Florian Dumitrache,
Elena Dutu,
Monica Scarisoreanu,
Valentin Serban Teodorescu,
Alexandra Sandulescu,
Crina Anastasescu and
Ioan Balint

Beilstein J. Nanotechnol. 2023, 14, 616–630, doi:10.3762/bjnano.14.51

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Figure 1: X-ray diffractograms of the TiO₂ powders: (a) samples of series “a” and (b) samples of series “b” (...

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Figure 2: TEM images and the particle distributions: (a) TO-250-a, (b) TO-850-a, and (c) TO-450-b.

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Figure 3: The HRTEM images of the TO-850-a powder.

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Figure 4: XPS spectra of TO-250-a, TO-850-b, and P25 samples: (a) survey spectra; (b–d) high-resolution XPS s...

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Figure 5: Absorbance of the TiO₂ samples at room temperature.

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Figure 6: Example of the calculated (a) indirect and (b) direct transitions from sample series “b”.

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Figure 7: Photoluminescence of the TiO₂ powders under λ_exc = 260 nm at room temperature: (a) samples of serie...

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Figure 8: Generation of hydroxyl radicals under simulated solar irradiation over the investigated catalysts a...

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Figure 9: Photocatalytic H₂ evolution from C₂H₅OH vapors over both catalyst series under simulated solar ligh...

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Figure 10: Photocatalytic CO₂ evolution from C₂H₅OH vapor over TiO₂ under simulated solar light irradiation: (...

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Figure 11: Comparative H₂/CO₂ formation rate over titania nanopowders in ethanol vapor environments: (a) serie...

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Figure 12: Schematic representation of the laser pyrolysis method.

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Published 22 May 2023

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