Synthesis and deposition of bismuth oxychloride with a rose-type flower shape and photoelectroactivity evaluation in the methyl orange discoloration reaction / Marcelo Rodrigues da Silva Pelissari in COLORATION TECHNOLOGY, Vol. 139, N° 6 (12/2023)  

[article]  inCOLORATION TECHNOLOGY > Vol. 139, N° 6 (12/2023) . - p. 742-757 Titre : Synthesis and deposition of bismuth oxychloride with a rose-type flower shape and photoelectroactivity evaluation in the methyl orange discoloration reaction Type de document : texte imprimé Auteurs : Marcelo Rodrigues da Silva Pelissari, Auteur ; Luan Pereira Camargo, Auteur ; Fenelon Martinho Lima Pontes, Auteur ; Luiz Henrique Dall'Antonia, Auteur Année de publication : 2023 Article en page(s) : p. 742-757 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Composés inorganiques -- Synthèse Conductimétrie Décoloration Orange méthylique Oxychlorure de bismuth Photoélectrochimie Rayonnement ultraviolet Index. décimale : 667.2 Colorants et pigments Résumé : In this work, bismuth oxychloride with a rose-type flower shape was successfully synthesised using the easy and low-cost successive ionic layer adsorption and reaction process. The tetragonal crystalline structure with a flower-like shape and thickness of 150-nm nanosheets was used as electrode material in an exciting approach for the photoelectrochemical discoloration reaction of methyl orange. The structure, morphology and optical properties of the obtained bismuth oxychloride sample were evaluated through X-ray diffraction, Raman spectroscopy, the Brunauer–Emmett–Teller method, diffuse reflectance ultraviolet–visible spectroscopy and scanning electron microscopy. Through photoelectrochemical characterisation measurements (linear sweep voltammetry, chronoamperometry and electrochemical impedance spectroscopy techniques), the bismuth oxychloride electrode showed remarkable electroactivity under ultraviolet light irradiation. The methyl orange discoloration reaction, performed under ultraviolet light incidence and potential application of −0.5 V (vs silver/silver chloride) for 60 minutes, produced a higher degradation percentage (ca. 82%) and kobs of 29 × 10−3 min−1. Note de contenu : - EXPERIMENTAL : Materials and reagents - Synthesis of bismuth oxychloride powder - Deposition of bismuth oxychloride film - Physical characterisation - Photoelectrochemical measurements - RESULTS AND DISCUSSION : Physical characterisation - Photoelectrochemical characterisation - Evaluation of MO discoloration reaction - Table 1 : Physical parameters obtained by the nitrogen adsorption–desorption process, and band gap energy (Egap) of bismuth oxychloride material - Table 2 : Electrochemical parameters obtained from the fluorine-doped tin oxide/bismuth oxychloride electrode - Table 3 : Kinetics parameters of the MO dye photoelectrocatalytic discoloration reaction (0.1 mmol L−1 in 0.1 mol L−1 Na2SO4), with the FTO/BiOCl electrode, obtained by the SILAR process. Measurements were performed in either the absence or presence of UV light and different applied potentials (vs Ag/AgCl) for 60 minutes DOI : https://doi.org/10.1111/cote.12685 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12685 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40124 [article]

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