Gas-Solid Phase Reaction Derived Silver Bismuth Iodide Rudorffite: Structural Insight and Exploring Photocatalytic Potential of CO 2 Reduction.

Autor: Chang JM; Department of Chemical and Materials Engineering, College of Engineering, Chang Gung University, Taoyuan, 33302, Taiwan., Lin TH; Department of Chemical and Materials Engineering, College of Engineering, Chang Gung University, Taoyuan, 33302, Taiwan., Hsiao KC; Department of Chemical and Materials Engineering, College of Engineering, Chang Gung University, Taoyuan, 33302, Taiwan., Chiang KP; Department of Chemical and Materials Engineering, College of Engineering, Chang Gung University, Taoyuan, 33302, Taiwan., Chang YH; Department of Chemical and Materials Engineering, College of Engineering, Chang Gung University, Taoyuan, 33302, Taiwan., Wu MC; Department of Chemical and Materials Engineering, College of Engineering, Chang Gung University, Taoyuan, 33302, Taiwan.; Center for Sustainability and Energy Technologies, Chang Gung University, Taoyuan, 33302, Taiwan.; Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital at Linkou, Taoyuan, 33305, Taiwan.; Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 24301, Taiwan.
Jazyk: angličtina
Zdroj: Advanced science (Weinheim, Baden-Wurttemberg, Germany) [Adv Sci (Weinh)] 2024 Jun; Vol. 11 (24), pp. e2309526. Date of Electronic Publication: 2024 Apr 22.
DOI: 10.1002/advs.202309526
Abstrakt: Photocatalytic reduction of CO 2 is a promising strategy to mitigate the effects of global warming by converting CO 2 into valuable energy-dense products. Silver bismuth iodide (SBI) is an attractive material owing to its tunable bandgap and favorable band-edge positions for efficient CO 2 photoreduction. In this study, SBI materials, including AgBi 2 I 7 , AgBiI 4 , Ag 2 BiI 5 , and Ag 3 BiI 6 are first synthesized, through gas-solid reaction by controlling the stoichiometric ratio of reactants. The X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) results revealed that the distance between Ag-I is proportional to the degree of Ag ions delocalization, which occupies the vacant sites. That greatly retards the charge recombination at vacant sites. In addition, the surface potential via photo-assisted Kelvin probe force measurements of various SBI catalysts shows that Ag 3 BiI 6 exhibits the highest surface potential change due to the rich delocalized Ag ions. This results in effective charge carrier transport and prevention of charge recombination at vacant sites. Taking the above advantages, the averaged CO and CH 4 production rates for Ag 3 BiI 6 achieved 0.23 and 0.10 µmol g -1  h -1 , respectively. The findings suggest that Ag 3 BiI 6 has a high potential as a novel photocatalyst for CO 2 reduction and sheds light on the possibility of solving environmental contamination and sustainable energy crises.
(© 2024 The Authors. Advanced Science published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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