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- Title
Catalytic Transformation of Nitroarenes to Amines over Ba (1−x) Sr x TiO 3 (0 < x < 1) Perovskites in Water.
- Authors
Kuźniarska-Biernacka, Iwona; Garbarz-Glos, Barbara; Skiba, Elżbieta; Maniukiewicz, Waldemar; Monteiro, Marta; Bąk, Wojciech; Szydłowski, Dariusz; Freire, Cristina
- Abstract
This work is focused on the application of lanthanide-free perovskite Ba1−xSrxTiO3 (0 < x < 1) in valorization of toxic pollutants as 4-nitrophenol (4-NPh). The series of perovskites were fabricated by facile, one-step solid-state preparation method and characterized via various techniques: elemental analysis (Inductively Coupled Plasma Optical Emission Spectrometry, ICP-OES), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and dielectric properties (impedance spectroscopy, IS). The methods confirmed the assumed composition, structure and high purity of the materials. The results showed that substitution of Ba2+ by Sr2+ in the perovskite crystal lattice influenced the dielectric properties of samples and the size of the grains. The absorption and catalytic properties of Ba(1−x)SrxTiO3 (0 < x < 1) series were evaluated in reduction of 4-NPh in water using NaBH4 as reducing agent. No adsorption of 4-NPh was found for all the materials during 180 min of contact (experiment without reducing agent), and the best catalytic performance was found for the Ba(1−x)SrxTiO3 (x = 0.3) sample. The catalytic transformation of 4-NPh to 4-APh follows a pseudo-first-order model, and the catalysts can be easily regenerated via mild annealing (300 °C).
- Subjects
INDUCTIVELY coupled plasma atomic emission spectrometry; X-ray powder diffraction; NITROAROMATIC compounds; DIELECTRIC properties; PEROVSKITE; INFRARED spectroscopy; RARE earth metals
- Publication
Molecules, 2024, Vol 29, Issue 7, p1416
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules29071416