Journal
MATERIALS LETTERS
Volume 341, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2023.134219
Keywords
Ag/Bi4Ti3O12; Nanocomposites; Photocatalysis; Oxidation; Water splitting
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In this study, Ag/Bi4Ti3O12 (Ag/BTO) nanocomposites with surface plasmon resonance (SPR) effect were synthesized by a solvothermal method. Compared with BTO, Ag/BTO narrowed the band gap, improved the absorption intensity in the 400-700 nm region, increased the separation efficiency of photo-induced electron-hole pairs, reduced the energy barrier of the key step from water splitting, and remarkably enhanced the photocatalytic water oxidation ability. The oxygen evolution rate of visible-light-driven 3-Ag/BTO with an appropriate silver content is 8.39 times higher than that of BTO without any sacrificial agent, and the performance of 3-Ag/BTO is also higher than that of most reported photocatalysts.
The search of catalysts with high efficiency for photocatalytic oxygen evolution by water splitting has always attracted great attention of global scientists. In this study, Ag/Bi4Ti3O12 (Ag/BTO) nanocomposites with surface plasmon resonance (SPR) effect were synthesized by a solvothermal method. Compared with BTO, Ag/BTO narrowed the band gap, improved the absorption intensity in 400-700 nm region, increased the separation efficiency of photo-induced electron-hole pairs, reduced the energy barrier (from 2.18 to 1.39 eV) of the key step (O* -> OOH*) from water splitting, and remarkably enhanced the photocatalytic water oxidation ability. The oxygen evolution rate of visible-light-driven 3-Ag/BTO with an appropriate silver content is 2623.51 mu mol center dot g(-1) center dot h(-1), which is 8.39 times higher than that of BTO without any sacrificial agent. Moreover, the excellent performance of 3-Ag/BTO is also obviously higher than that of most reported photocatalysts.
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