Water splitting in H2 and O2 on new Sr2M2O7 (M = Nb and Ta) photocatalysts with layered perovskite structures: factors affecting the photocatalytic activity

Article Abstract:

Issues concerning the splitting of photocatalytic water from a viewpoint of light energy conservation are presented. Latest research has sought to identify new photocatalysts.

Analysis, Catalysts, Photochemical research, Chemistry, Physical and theoretical, Physical chemistry, Perovskite

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Water splitting into H(sub 2) and O(sub 2) on alkali tantalate photocatalysts ATaO(sub 3) (A = Li, Na, and K)

Article Abstract:

The optimum conditions of the preparation and photocatalytic reactions on alkali tantalates are investigated to improve photocatalytic activities. Alkali tantalate ATaO3 (A = Li, Na, and K) photocatalysts with perovskite-like structure indicate activities for water splitting into H2 and O2 under UV irradiation.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Lithium Compounds, Observations, Chemical reactions, Alkali metal compounds

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Time resolved infrared spectroscopy of K3Ta3B2O12 photocatalysts for water splitting

Article Abstract:

Electrons photoexcited in [K.sub.3][Ta.sub.3][B.sub.2][O.sub.12], an efficient photocatalyst for the water-splitting reaction driven by ultraviolet light (UV), are observed using time-resolved IR absorption spectroscopy with microsecond resolution. When the catalyst is irradiated with 266nm light pulses, a structureless absorption appears at 3000-1500 [cm.sup.-1], which is assigned to absorption by electrons UV-excited and then trapped in mid-gap states.

Usage, Radiation chemistry, Infrared spectroscopy

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