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Insight of SrCl2 as an Appropriate Flux Medium in Synthesizing Al-Doped SrTiO3 Photocatalyst for Overall Water Splitting

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Abstract

In the preparation of SrTiO3 photocatalysts, the flux treatment in corundum crucible typically increases the crystallinity and promotes Al3+ into the perovskite structure, responsible for the decrease in the concentration of Ti3+ defects. As a result, they can give a better performance in the water-splitting reaction. Thence, the selection of flux medium is crucial, and the insight of its effect on the SrTiO3 nanoparticles can give guidance for designing the synthesis process. Here, we respectively use LiCl, NaCl, KCl and SrCl2 as the flux medium assisting the preparation of SrTiO3. Combining characterizations and photocatalysis evaluations, we found that the size of cations had an influence on the SrTiO3 phase structure, and the thermal conductivity of chloride salts had an effect on the Al-doping amount into SrTiO3. Considering the two aspects, SrCl2 is the more appropriate flux medium in synthesizing SrTiO3 photocatalysts.

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Acknowledgements

This work was supported by the National Natural Science Foundation of Jiangsu Province (Grant No. BK20210308), the Basic Science Center Program for Ordered Energy Conversion of the National Natural Science Foundation of China (Grant No. 51888103), the Postdoctoral Science Foundation of China (Grant No. 2021M701695), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. SJCX21_0097) and the Key Projects of Innovation Training Program for College Students in Jiangsu Province (Grant No 202110287044z).

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Authors and Affiliations

  1. Centre for Hydrogenergy, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, People’s Republic of China

    Fan Fang, Ruize Xu, Zhiyuan Su, Jinghan Li, Ruixue Sun & Kun Chang

  2. Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, 471934, People’s Republic of China

    Donglei Guo

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  1. Fan Fang
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  2. Ruize Xu
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  3. Zhiyuan Su
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  4. Jinghan Li
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  5. Ruixue Sun
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  7. Kun Chang
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Correspondence to Kun Chang.

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Fang, F., Xu, R., Su, Z. et al. Insight of SrCl2 as an Appropriate Flux Medium in Synthesizing Al-Doped SrTiO3 Photocatalyst for Overall Water Splitting. Catal Lett 153, 1083–1088 (2023). https://doi.org/10.1007/s10562-022-04048-6

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  • DOI: https://doi.org/10.1007/s10562-022-04048-6

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