Combined effect between PVP and glass wool for improvement of the photocatalytic activity under visible light of bismuth (III) oxyhalide and access to α-Bi2O3-BiOI-BiOBr
| Autor: | Meriem Mansour, Hafida Hentit, Bruno Boury, Abdelhadi Bentouami, Bahia Benalioua, Pierre-Emmanuel Lippens, Imane Benyamina |
|---|---|
| Přispěvatelé: | Université Abdelhamid Ibn Badis de Mostaganem, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Polyvinylpyrrolidone
Oxide General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Catalysis chemistry.chemical_compound chemistry Rhodamine B Photocatalysis medicine Hydroxyl radical 0210 nano-technology Photodegradation medicine.drug Visible spectrum Nuclear chemistry |
| Zdroj: | Applied Surface Science Applied Surface Science, Elsevier, 2020, 534, pp.147577. ⟨10.1016/j.apsusc.2020.147577⟩ |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2020.147577⟩ |
| Popis: | Improvement of the photocatalytic efficiency of BiOI/BiOBr composite have been obtained by a combined effect between a structuring agent like polyvinylpyrrolidone (PVP) and glass wool (GW) introduced during their synthesis by solvothermal (STP) or hydrothermal (HTP) process. The photocatalysts were characterized by XRD, SEM, XPS, UV–Visible DRS, BET and EDX and their activity tested in the photo-degradation of Rhodamine B (RhB) under visible light. Photocatalyst prepared by STP have higher photocatalytic efficiency than those prepared by HTP, moreover, the presence of PVP and GW greatly improve this efficiency, a total discoloration of RhB solution (20 mg L−1) being obtained after 18 min. The photodegradation mechanism has been proposed by the identification of the radical species responsible for the degradation. Indeed, two radical species have been identified for the catalyst prepared without GW, most of them the hole (h+) and moderately super oxide anion ( O 2 · - ). Differently, for the catalyst prepared with GW, three species have been identified, h+ being the main species with a moderate contribution of the hydroxyl radical (HO ) and O 2 · - . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect