Development of new photocatalytic water splitting into H2 and O2 using two different semiconductor photocatalysts and a shuttle redox mediator IO3(super -)/I(super -)

Article Abstract:

A new type of photocatalytic reaction that splits water into H2 and O2 is designed using a two-step photoexcitation system composed of an iodate/iodide [IO3(super -)/I(super -)] shuttle redox mediator and two different photocatalysts, one for H2 evolution and the other for O2 evolution. Photocatalytic oxidation of water to O2 and reduction of IO3(super -) to I(super -) selectively proceeded with good efficiencies over TiO2-rutile and Pt-WO3 photocatalysts under UV and visible light irradiations.

Optical properties

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Efficient eosin Y dye-sensitized solar cell containing Br(super -)/Br(sub 3)(super -) electrolyte

Article Abstract:

A study on Br(super -)/Br(super -)(sub 3) redox couple employed in dye-synthesized solar cells (DSSC) was performed. The study revealed that the Br(super -)/Br(super -)(sub 3) couple may be an alternative to the I(super -)/I(sub 3)(super -) couple of those dyes with more positive potentials than E(Br(super -)/Br(super -)(sub 3)) in DSSC in terms of good match between the highest occupied molecular orbital (HOMO) of the dye and the potential of the redox couple.

Solar cells, Solar batteries, Eosin

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A CASPT2/CASSCF study of vertical and adiabatic electron transitions of acrolein in water solution

Article Abstract:

Two alternative methods are described for calculating solvent shift on adiabatic transitions and their performance is analyzed. A new method is proposed for calculating transition free energy in adiabatic transitions, where this method has avoided the classical calculation of the free-energy difference between the ground and excited-state.

Analysis, Adiabatic processes (Thermodynamics)

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