SKM 2023 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 7: Poster I
HL 7.32: Poster
Monday, March 27, 2023, 13:00–15:00, P2/EG
Synthesis of bismuth ferrite hollow spheres and their application in the photocatalytic degradation of dyes — •Valeria Sanchez1, Thomas Cadenbach2, Alexis Debut3, Karla Vizuete3, and Maria J. Benitez1 — 1Departamento de Física, Facultad de Ciencias, Escuela Politécnica Nacional, Ladrón de Guevara E11-253, Quito, Ecuador — 2Colegio de Ciencias e Ingenierías, Universidad San Francisco de Quito, Diego de Robles y Vía Interoceánica, Quito, Ecuador — 3Centro de Nanociencia y Nanotecnología, Universidad de las Fuerzas Armadas ESPE, Av. Gral. Rumiñahui s/n, Sangolquí, Ecuador
In this work, we show the synthesis and application of next generation semiconductor photocatalysts, i.e. GdxBi1-xFeO3 (x = 0, 0.05. 0.10, 0.15) hollow spheres which function as both, an advanced adsorption material and photocatalytic active semiconductor. The presented spheres were prepared by two distinct novel synthetic protocols, i.e. via a citric acid/urea/ethylene glycol assisted hydrothermal method and via an evaporation induced self-assembly strategy. In both cases, we study the mechanism of formation of phase pure GdxBi1-xFeO3 hollow spheres with a narrow size distribution by varying synthetic conditions such concentration, temperature and treatment time. The samples were characterized by X-ray powder diffraction, scanning electron microscopy and UV-vis diffuse reflectance spectroscopy. All synthesized materials were applied in the photocatalytic degradation of dyes under visible light irradiation. The photocatalysts show superior efficiencies which outperformed previously reported BiFeO3 materials.