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• W4320341106 endingPage "123310" @default.
• W4320341106 startingPage "123310" @default.
• W4320341106 abstract "The doping of certain exotic metal ions in photocatalysts may produce surface defects (such as oxygen vacancies) as well as bandgap changes, which may play an important role for their photocatalytic performance. In this work, bandgap modulation by precise control of defect concentration and transition metal oxidation state mainly owning to A-site doping and the B-site cations were achieved for the Ruddlesden-Popper structure (La2NiO4). The effects of K+, Sr2+, Co2+, Mn2+ single-mental doping and co-doping on the photocatalytic activity of La2NiO4 photocatalysts were investigated. It was found that the co-doping samples had a significant synergistic effect on the optical properties and photocatalytic activity of La2NiO4 photocatalysts. All the single-metal-doped La2NiO4 photocatalysts exhibited higher photocatalytic activity than their pristine counterpart. Moreover, the Sr2+, Co2+ co-doped La2NiO4 exhibited the best optical properties, photocatalytic activity and a the hydrogen production rate of La1.9Sr0.1Ni0.8Co0.2O4+δ more than 29 times of pure La2NiO4, has been achieved. Further analysis indicates that the surface oxygen vacancies as active sites promote efficient separation and migration of photogenerated carriers. The co-doped photocatalyst not only has a narrower bandgap, but also owns a more favorable conduction band position for photoinduced electron reduction. Overall, this work provides a simple method for introducing oxygen defects and bandgap modulation in Ruddlesden-Popper structure through metal ion doping. It is also expected to enlarge the understanding of the structure-dependence of the photocatalytic performance of perovskite materials." @default.
• W4320341106 created "2023-02-13" @default.
• W4320341106 creator A5007929536 @default.
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• W4320341106 date "2023-04-01" @default.
• W4320341106 modified "2023-09-30" @default.
• W4320341106 title "Bandgap and defects regulation of La2−xAxNi1−yByO4+δ (A = K, Sr, B = Co, Mn) Ruddlesden-Popper type perovskites for efficient photocatalytic hydrogen evolution" @default.
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• W4320341106 doi "https://doi.org/10.1016/j.seppur.2023.123310" @default.
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