کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1298525 1498355 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and visible light photocatalysis water splitting property of chromium-doped Bi4Ti3O12
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Synthesis and visible light photocatalysis water splitting property of chromium-doped Bi4Ti3O12
چکیده انگلیسی

Photocatalysts Bi4Ti3 − xCrxO12(x = 0.00, 0.06, 0.15, 0.30, 0.40, and 0.50) with perovskite structure were synthesized by sol–gel method and their electronic structures and photocatalytic activities were investigated. The Bi4Ti2.6Cr0.4O12 photocatalyst exhibited the highest performance of H2 evolution in methanol aqueous solution (58.1 μmol h− 1 g− 1) under visible light irradiation (λ > 400 nm) without a co-catalyst, whereas no H2 evolution is observed for Bi4Ti3O12 under the same conditions. The UV–vis spectra indicated that the Bi4Ti2.6Cr0.4O12 had strong photoabsorption in the visible light region. The results of density functional theory (DFT) calculation illuminate that the conduction bands of Bi4Ti3O12 are mainly attributable to the Ti 3d + Bi 6p orbitals, and the valence bands are composed of O 2p + Bi 6s hybrid orbitals, while the conduction bands of chromium-doped Bi4Ti3O12 are mainly attributable to the Ti 3d + Bi 2p + Cr 3d orbitals, and the O 2p + Cr 3d hybrid obitals are the main contribution to the valence band.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 180, Issues 36–39, 8 December 2009, Pages 1599–1603
نویسندگان
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