Synthesis and Photocatalytic Properties of Bi₂Ti₂O₇ Nano-Powders

Abstract:

Bi₂Ti₂O₇ nanopowders were prepared using bismuth nitrate and tetrabutyl titanate as starting materials by sol-gel method. The decomposition of precursors, crystal structure and microstructure of the sample was characterized by TG/DTA, XRD and TEM techniques, and the results indicate that the sample is well-crystallized pyrochlore Bi₂Ti₂O₇ phase with spherical shape and an average grain size of 30 nm. Photocatalytic activity of Bi₂Ti₂O₇ powders was evaluated by photodegrading methyl orange solution. The result shows that Bi₂Ti₂O₇ has a higher photocatalytic activity than TiO₂ (mixed with rutile and anatase) with the same concentration, and when concentration of Bi₂Ti₂O₇ increased to 9g/L, half-life period T_1/2 is 0.97h, then methyl orange solution can be completely degraded in more than an hour.

• Periodical: Advanced Materials Research (Volume 412)
• Pages: 103-106
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.412.103
• Online since: November 2011
• Authors: Xiao Li Su, Ying Chun Zhang
• Keywords: Bi₂Ti₂O₇, Photocatalytic Activity, Sol-Gel Method, X-Ray Diffraction (XRD)

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