A facile method to prepare mesoporous anatase TiO{sub 2} materials in water at lower temperatures

Journal Article · Wed Jul 15 04:00:00 EDT 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.03.020· OSTI ID:22475819

Luo, Qingzhi; Chen, Yu; Wang, Desong; An, Jing; Li, Xueyan; Yin, Rong; Shi, Le

Highlights: • Mesoporous anatase TiO{sub 2} was prepared in water at lower temperatures than 90 °C. • The specific surface areas of as-prepared TiO{sub 2} are in the range of 235–345 m{sup 2} g{sup −1}. • The as-prepared TiO{sub 2} possesses high UV or visible light photocatalytic activity. - Abstract: Mesoporous anatase TiO{sub 2} has been successfully prepared in water at lower temperatures than 90 °C. Firstly, amorphous TiO{sub 2} gels were prepared by conventional sol–gel method at room temperature with tetrabutyl titanate as precursor, and then TiO{sub 2} gels were directly put into water at temperatures of 50–90 °C for 0.5–10 h to form mesoporous anatase TiO{sub 2}. The as-prepared mesoporous TiO{sub 2} was characterized by XRD, TEM, FTIR, Raman, UV–vis DRS, DSC–TGA, and XPS. The results showed that mesoporous anatase TiO{sub 2} contained some organic residuals, the mean size of the TiO{sub 2} nanocrystals was in the range of 3.5–5.4 nm, and their BET specific surface areas were in the range of 235–345 m{sup 2} g{sup −1}. The photocatalytic activity of as-prepared TiO{sub 2} was obviously higher than those of the commercial TiO{sub 2} (P25) and TiO{sub 2} calcined at 450 °C for 3 h under UV or visible light irradiation.

• OSTI ID: 22475819
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 67; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALORIMETRY
FOURIER TRANSFORMATION
GELS
INFRARED SPECTRA
NANOSTRUCTURES
PHOTOCATALYSIS
POROUS MATERIALS
PRECURSOR
SOL-GEL PROCESS
SPECIFIC SURFACE AREA
THERMAL GRAVIMETRIC ANALYSIS
TITANIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
VISIBLE RADIATION
WATER
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY