Visible-light photocatalytic activity of the metastable Bi{sub 20}TiO{sub 32} synthesized by a high-temperature quenching method

Journal Article · Sat Aug 15 00:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.06.006· OSTI ID:21370551

Hefeng, Cheng ^[1]; Ying, Dai ^[2]; Xiaoyan, Qin; Xiaoyang, Zhang; Zeyan, Wang; Minhua, Jiang ^[1]

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1. State Key Lab of Crystal Materials, Shandong University, Jinan 250100 (China)
2. School of Physics, Shandong University, Jinan 250100 (China)

Metastable Bi{sub 20}TiO{sub 32} samples were synthesized by a high-temperature quenching method using alpha-Bi{sub 2}O{sub 3} and anatase TiO{sub 2} as raw materials. The photocatalytic activity of the as-prepared samples was measured with the photodegradation of methyl orange at room temperature under visible light irradiation. The Bi{sub 20}TiO{sub 32} samples exhibited good absorption in the visible light region with a band gap of about 2.38 eV and the band structure of Bi{sub 20}TiO{sub 32} was studied. Photodegradation against methyl orange was much better than alpha-Bi{sub 2}O{sub 3} prepared by the same way. The photocatalytic activity of Bi{sub 20}TiO{sub 32} samples is supposed to be associated with the hybridized Bi 6s and O 2p orbitals. In addition, the dispersive characteristic of Bi 6s orbital in the hybridized valence band facilitates the mobility of the photogenerated carriers and hampers their recombination. - Graphical abstract: Metastable Bi{sub 20}TiO{sub 32} samples were successfully synthesized by a quenching process. Photodegradation against methyl orange showed high visible-light activity and it was supposed to be associated with its corresponding band structure.

• OSTI ID: 21370551
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 8 Vol. 182; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ABSORPTION
AMINES
AZO COMPOUNDS
AZO DYES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CARRIERS
CATALYSIS
CHALCOGENIDES
DYES
ENERGY RANGE
EV RANGE
EV RANGE 01-10
INDICATORS
IRRADIATION
MATERIALS
METHYL ORANGE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCATALYSIS
QUENCHING
RAW MATERIALS
SORPTION
SULFONIC ACIDS
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS