Characterization and photocatalysis of Eu{sup 3+}-TiO{sub 2} sol in the hydrosol reaction system

Journal Article · Fri Apr 02 00:00:00 EST 2004 · Materials Research Bulletin

OSTI ID:20888035

Yibing, Xie; Chunwei, Yuan

In this paper, 3.0 mol% lanthanide europium ion modified TiO{sub 2} sol (Eu{sup 3+}-TiO{sub 2}) was fabricated by chemical coprecipitation-peptization method with TiCl{sub 4} as precursor. Eu{sup 3+}-TiO{sub 2} sol particles were characterized by X-ray diffraction (XRD), atomic force microscope (AFM), transmission electron microscope (TEM) and particle size distribution (PSD). Eu{sup 3+}-TiO{sub 2} sol particles prepared at low temperature (70 deg. C) had anatase semicrystalline structure. Eu{sup 3+}-TiO{sub 2} sol sample homogeneously dispersed in the aqueous medium and presented narrow distribution characterization with 7 nm in mean size. Interfacial adsorption experiment shows that small particle size and positive charge of sol particles contributed to the good adsorption of X-3B dye on the TiO{sub 2} surface. The photoelectrochemical property was investigated about electrons transfer efficiency between dye molecule and TiO{sub 2} particles. A novel hydrosol reaction system was designed to conduct X-3B photodegradation reaction. The excellent photocatalytic activity for X-3B degradation under visible light irradiation was ascribed to effective scavenging electrons by Eu{sup 3+} ion. Moreover, X-3B photocatalytic degradation mechanism under visible light excitation was proposed as photosensitization-photocatalysis.

• OSTI ID: 20888035
• Journal Information: Materials Research Bulletin, Vol. 39, Issue 4-5; Other Information: DOI: 10.1016/j.materresbull.2004.01.001; PII: S0025540804000029; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADSORPTION
ATOMIC FORCE MICROSCOPY
CHEMICAL PREPARATION
COPRECIPITATION
DYES
ELECTRON TRANSFER
EUROPIUM IONS
EXCITATION
IRRADIATION
PARTICLE SIZE
PHOTOCATALYSIS
PHOTOELECTRON SPECTROSCOPY
RARE EARTHS
SOLS
SURFACE PROPERTIES
TITANIUM CHLORIDES
TITANIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION