Details

Autor(en) / Beteiligte

• da Silva, Fausthon F.
• Menezes de Oliveira, André L.
• de Araújo, Thayná Carla Barbosa
• Marques-Santos, Luis Fernando
• Su, Bo

Titel

Highly photocatalytic titanium oxide/Carbon nitride heterojunctions obtained via dual asymmetric centrifugation

Ist Teil von

• Materials science & engineering. B, Solid-state materials for advanced technology, 2024-05, Vol.303, p.117298, Article 117298

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Dual asymmetric centrifugation (DAC) was used to produce TiO2/g-C3N4 heterojunctions.•Heterojunctions were capable to photodegrade dyes under visible light irradiation.•Radical scavenger experiments indicate that the photocatalyst act via Z-scheme. In this work dual asymmetric centrifugation technique was applied to obtain new TiO2/carbon nitride heterojunctions (TiO2/g-C3N4) with high photocatalytic performance. Materials were obtained from TiO2 and g-C3N4, with an optimal mass ratio of 1.0:0.1 for achieving the highest photocatalytic activity in dyes degradation. The TiO2/g-C3N4 (1.0/0.1) photocatalyst was characterized via X-ray diffraction, confirming the crystalline phases and chemical composition of the material. UV–VIS spectroscopy data showed an increase in the visible light absorption, indicating an effective interaction between the heterojunction components. XPS data showed the formation of Ti3+ ions and oxygen vacancies, boosting the photocatalytic process. The TiO2/g-C3N4 (1.0/0.1) showed the highest photocatalytic performance degrading 99.9 % of rhodamine B and 99.6 % of methylene blue in 60 min under LED light irradiation. Radicals trapping experiments indicated O2–● radicals as the major photoactive species, through a Z-scheme type mechanism. The product of RhB photodegradation did not show toxicity to Artemia fransciscana larvae.