Sunlight induced formation of surface Bi2O4-x-Bi2O3 nanocomposite during the photocatalytic mineralization of 2-chloro and 2-nitrophenol
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- Authors:
- HAMEED, Abdul
ASLAM, Muhammad
ISMAIL, Iqbal M. I
SALAH, Numan
FORNASIERO, Paolo - Author Affiliations:
- Center of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah 21589, Saudi Arabia
National Centre for Physics, Quaid-e-Azam University, Islamabad 44000, Pakistan
Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia
Department of Chemical and Pharmaceutical Sciences, ICCOM-CNR, University of Trieste, 34127 Trieste, Italy - Source:
- Applied catalysis. B, Environmental. 163:444-451
- Publication Date:
- 2015-01-01
- Language:
- English
- Abstract:
- The photocatalytic mineralization of 2-chlorophenol (2-CP) and 2-nitrophenol (2-NP) was investigated using α-Bi2O3. The experiments were performed both in complete spectrum and in the visible region (420-800 nm) of the sunlight. The materials were fully characterized by means of UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analysis and field emission scanning electron microscopy (FESEM). α-Bi2O3 showed considerably higher activity for the mineralization of 2-nitrophenol and 2-chlorophenol under natural sunlight exposure, however still appreciable activity was observed in the visible region. Formation of surface nanocomposites Bi2O4-x-Bi2O3 was observed under sunlight irradiation due to the presence of UV light. The sunlight exposed Bi2O3, i.e. Bi2O4-xBi2O3 composite, showed excellent activity for the degradation and mineralization of 2-CP and 2-NP in the visible region of sunlight. A key role of both hydroxyl and superoxide anion radicals was evidenced in the degradation and mineralization processes under sunlight while only hydroxyl radicals were identified as major facilitators under visible light irradiation.
- Notes:
- General chemistry and physical chemistry
- Subjects:
- General chemistry, physical chemistry
Chimie générale, chimie physique
Environment
Environnement
Sciences exactes et technologie
Exact sciences and technology
Chimie
Chemistry
Chimie generale et chimie physique
General and physical chemistry
Théorie des réactions, cinétique générale. Catalyse. Nomenclature, documentation chimique, informatique chimique
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Catalyse
Catalysis
Physicochimie des réactions induites par rayonnements, particules et ultrasons
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Photochimie
Photochemistry
Alcool
Alcohol
Composé benzénique
Benzenic compound
Compuesto bencénico
Catalyse hétérogène
Heterogeneous catalysis
Catálisis heterogénea
Chlorophénol
Chlorophenol
Clorofenol
Composé du chlore
Chlorine compounds
Cloro compuesto
Dégradation
Degradation
Degradación
Minéralisation
Mineralization
Mineralización
Nanocomposite
Nanocompuesto
Oxyde de bismuth
Bismuth oxide
Bismuto óxido
Photocatalyse
Photocatalysis
Fotocatálisis
Phénols
Phenols
Fenoles
Protection environnement
Environmental protection
Protección medio ambiente
Photocatalyseur
Photocatalyst
2-Chlorophenol degradation
2-Nitrophenol degradation
Bi2O3 based photocatalyst
Sunlight photocatalysis - Format:
- Academic Journal
- Database:
- PASCAL Archive
- Journal:
- Applied catalysis. B, Environmental
- Volume:
- 163
- Page Start:
- 444
- Page Count:
- 8
- ISSN:
- 09263373
- Publisher:
- Kidlington: Elsevier, 2015.
- Document Type:
- Article
- Physical Description:
- print, 38 ref
