Band structures and nitrogen doping effects in zinc titanate photocatalysts
نویسندگان
چکیده
منابع مشابه
Nanoscale strontium titanate photocatalysts for overall water splitting.
SrTiO(3) (STO) is a large band gap (3.2 eV) semiconductor that catalyzes the overall water splitting reaction under UV light irradiation in the presence of a NiO cocatalyst. As we show here, the reactivity persists in nanoscale particles of the material, although the process is less effective at the nanoscale. To reach these conclusions, Bulk STO, 30 ± 5 nm STO, and 6.5 ± 1 nm STO were synthesi...
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The reduction of bulk mixed oxides of zinc and titanium of various compositions and Zn-Ti-0 crystalline phases was studied in a thermogravimetric apparatus in Hz-H,O-N, gas mixtures at 550-1050°C. Comparative reduction experiments with ZnO were also performed. In the absence of water vapor, activation energies of 24 and 37 kcal mol’ were obtained for ZnO and Zn-Ti-0. resnectivelv. The addition ...
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A series of BiOBrxI(1-x) solid solutions were explored as novel visible light-sensitive photocatalysts. These BiOBrxI(1-x) solid-solution photocatalysts grew into two-dimensional nanoplates with exposed (001) facets and possessed continuously modulated band gaps from 2.87 to 1.89 eV by decreasing the Br/I ratio. The photocatalytic activities of these samples were measured, and the samples exhib...
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Mixtures of BaCO3, ZnO and TiO2 powders, with molar ratio of 1:2:4, were mechanically activated for 20, 40 and minutes in a planetary ball mill. The resulting powders were compacted into pellets and isothermally sintered at 1250 °C for 2h with a heating rate of 10 °C/min. X-ray diffraction analysis of obtained powders and sintered samples was performed in order to investigate changes of the pha...
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ژورنال
عنوان ژورنال: Catalysis Today
سال: 2013
ISSN: 0920-5861
DOI: 10.1016/j.cattod.2012.08.039