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Exploration and Evaluation of Proton Sources Assisted Photocatalyst for Hydrogen Generation

Abstract

The present paper reports about superior performance of some amine based proton sources in enhancing photocatalytic efficiency of Fe2O3-TiO2 composite during water splitting reaction. The band gap of the Fe2O3-TiO2 catalyst is tuned to 2.3 eV by varying the Fe content. The heterojunctions generated in the photocatalyst facilitate effective charge carrier migration suppressing the electron - hole recombination rate. The enhanced photocatalytic activity of the catalyst is studied using an experimental setup comprising of a Solar Simulator (AAA) and a Hydrogen Gas Chromatograph. The effect of proton sources viz., aniline hydrogen chloride (AH), diethylamine hydrogen chloride (DAH) and triethylamine hydrogen chloride (TAH), on the photocatalytic performance of the catalyst is explored and studied in detail. These proton sources serve as electron donors that stimulate photogenerated electron - hole separation that result in high quantum efficiency of the Fe2O3-TiO2 photocatalyst. A very high hydrogen generation rate of 880 µmol h-1 is achieved with the DAH assisted Fe2O3-TiO2, whereas it is just 323 µmol h-1 with the Fe2O3-TiO2 alone. The enhancement in the hydrogen generation rate is attributed to high basic nature, distinct hole scavenging action, low electron - hole recombination rate and the swift interfacial charge - transfer process. The effect of other proton sources assisted catalyst are also discussed in detail.

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Publication details

The article was received on 12 Mar 2019, accepted on 12 Apr 2019 and first published on 15 Apr 2019


Article type: Paper
DOI: 10.1039/C9PP00119K
Citation: Photochem. Photobiol. Sci., 2019, Accepted Manuscript

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    Exploration and Evaluation of Proton Sources Assisted Photocatalyst for Hydrogen Generation

    T.C. Bhagya, A. Krishnan, A. R. S, A. S. M, B. R. Sreelekshmy, P. Jineesh and S.M.A. Shibli, Photochem. Photobiol. Sci., 2019, Accepted Manuscript , DOI: 10.1039/C9PP00119K

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