Novel visible-light AgBr/Ag₃PO₄ hybrids photocatalysts with surface plasma resonance effects
Three kinds of AgBr/Ag₃PO₄ hybrids were synthesised via an anion-exchange precipitation method and characterised by XRD, XPS, SEM, EDS, and UV–vis. The results showed that AgBr/Ag₃PO₄ hybrids displayed much higher photocatalytic activities than single Ag₃PO₄ or AgBr under visible light (λ>420 nm), and ·OH and h⁺ were the major active species during the degradation process. Considering interstitial ions Agᵢ⁺ on lattice gap of AgBr are easy to become sliver particle, we deduced the possible photocatalytic mechanism could be ascribed to the synergistic effects of the appropriate valence band position of Ag₃PO₄ and AgBr, surface plasmon resonance effect of Ag⁰, reactive radical species Br⁰, and the Ag vacancy on the surface of catalysts. - Graphical abstract: The optical absorption and structural morphology of the as-prepared AgBr@Ag₃PO₄ photocatalyst using an anion-exchange precipitation method are conductive to the photocatalytic degradation of organics in water. Highlights: • Novel AgBr/Ag₃PO₄ hybrids are synthesised by a facile method. •AgBr/Ag₃PO₄ hybrids show excellent photocatalytic activities under visible light. • Interstitial ions are in favour of the formation of Ag particle. • Surface plasmon resonance effect plays a key factor for light absorption. • The photocatalytic mechanism for AgBr/Ag₃PO₄ hybrids is studied.
- OSTI ID:
- 22306312
- Journal Information:
- Journal of Solid State Chemistry, Vol. 202; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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