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Content available PANI/NaTaO3 composite photocatalyst for enhanced hydrogen generation under UV light irradiation
Zielińska B., Schmidt B., Mijowska E., Kaleńczuk R.
Polish Journal of Chemical Technology
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2017
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Vol. 19, nr 3
115--119
EN
A PANI/NaTaO3  composite was successfully synthesized by an oxidative polymerization of aniline monomer in hydrochloric acid solution containing sodium tantalate. NaTaO3  at a monoclinic structure was produced via hydrothermal method. The photocatalytic activities of the unmodified NaTaO3  and PANI/NaTaO3  were evaluated for hydrogen generation from an aqueous HCOOH solution and under UV light irradiation. The results showed that the evolution rate of H2  increased significantly when NaTaO3  was modified with PANI. The enhancement of the photocatalytic activity of PANI/NaTaO3  composite was ascribed to the effective charge transfer and separation between NaTaO3  and PANI, which reduced their recombination. This indicates that PANI modification of tantalate photocatalysts may open up a new way to prepare highly efficient catalytic materials for H2  generation.
2
Content available Comparison of NaNbO3 and NaTaO3 as the photocatalysts in the reaction of hydrogen generation
Zielińska B., Kaleńczuk R. J. R. J.
Polish Journal of Chemical Technology
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2010
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Vol. 12, nr 3
33-35
EN
The photocatalytic production of hydrogen over several chemical compounds based on sodium niobates and tantalates has been investigated. The photocatalysts have been prepared by an impregnation method of Nb2O5and Ta2O5 in the aqueous solution of sodium hydroxide and then the calcination at the temperature range of 450 – 800°C. In this report, we present the study showing that of the catalysts explored, the highest photocatalytic activity was shown in a sample obtained at the temperature of 450°C and containing NaTaO3 as a main phase.
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