Synthesis of visible-light driven CrxOy-TiO2 binary photocatalyst based on hierarchical macro-mesoporous silica
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- Authors:
- LIUJIA LU
FEI TENG
SENTAPAS
DIANYU QI
LINGZHI WANG
JINLONG ZHANG - Author Affiliations:
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
Innovative Research Laboratory of Environment & Energy, Jiangsu Key Laboratory of Atmospheric Environment Monitoring & Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, China
Centre for Materials Science, Institute of Nanotechnology and Bioengineering, School of Forensic and Investigative Sciences, University of Central Lancashire, Preston, United Kingdom - Source:
- Applied catalysis. B, Environmental. 163:9-15
- Publication Date:
- 2015-01-01
- Language:
- English
- Abstract:
- Hierarchical macro-mesoporous silica materials co-incorporated with Crand Ti were directly synthesized by adopting close-packed array of polystyrene microsphere as hard template for macropore through a simple soaking-calcination way, where Si/Ti ratio was fixed at 200 and Si/Cr ratio was set between 200 and 10. Ti specie is highly dispersed in porous matrix and Cr specie mainly exists as tetra-coordinated CrO3 at higher Si/Cr ratio (Si/Cr ≥ 50), which transforms to a mixture of CrO3 and crystallized hexa-coordinated Cr2O3when Si/Cr ratio is below 50. This highly interconnected porous material co-incorporated with Cr and Ti presents highest visible-light driven photocatalytic activity at Si/Cr = 20 toward degradation of A07. Moreover, macro-mesoporous photocatalyst presents higher activity than those of macroporous and mesoporous ones at the same Si/Cr ratio. The improved visible light driven catalytic activity is mainly attributed to effective metal to metal charge transfer from Cr(VI) to Ti(IV) benefitted from the uniform dispersion of these two species in hierarchical porous silica matrix.
- 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
Etat colloïdal et états dispersés
Colloidal state and disperse state
Matériaux poreux
Porous materials
Composé binaire
Binary compound
Compuesto binario
Composé de métal de transition
Transition element compounds
Matériau poreux
Porous material
Material poroso
Catalyse hétérogène
Heterogeneous catalysis
Catálisis heterogénea
Mésoporosité
Mesoporosity
Mesoporosidad
Oxyde de titane
Titanium oxide
Titanio óxido
Photocatalyse
Photocatalysis
Fotocatálisis
Protection environnement
Environmental protection
Protección medio ambiente
Silice
Silica
Sílice
Synthèse
Synthesis
Síntesis
Photocatalyseur
Photocatalyst
SiO2
Hierarchical macro-mesoporous silica
Si-Cr-Ti
Visible-light driven photocatalysis - Format:
- Academic Journal
- Database:
- PASCAL Archive
- Journal:
- Applied catalysis. B, Environmental
- Volume:
- 163
- Page Start:
- 9
- Page Count:
- 7
- ISSN:
- 09263373
- Publisher:
- Kidlington: Elsevier, 2015.
- Document Type:
- Article
- Physical Description:
- print, 51 ref
