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Article

Structurally and Compositionally Tunable Absorption Properties of [email protected] Nanocatalysts for Plasmonic Photocatalytic Degradation of Environmental Pollutants

Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea
*
Author to whom correspondence should be addressed.
These authors contributed equally.
Catalysts 2020, 10(4), 405; https://doi.org/10.3390/catal10040405
Received: 3 March 2020 / Revised: 1 April 2020 / Accepted: 4 April 2020 / Published: 8 April 2020
(This article belongs to the Special Issue Nanomaterials in Photo(Electro)catalysis)
Composite nanomaterials having Ag nanoparticles (NPs) that decorate nanostructured AgCl (Ag/AgCl) are promising as plasmonic photocatalysts because of the visible-light absorption of Ag NPs. However, the narrow absorption bands of Ag NPs near 400 nm cause inefficient absorption in the visible range and, consequently, unsatisfactory photocatalytic activity of Ag/AgCl nanomaterials. In this study, we introduce a new class of AgCl-based photocatalysts that are decorated with bimetallic Ag and Au NPs ([email protected] NPs) for visible-light-driven photocatalytic degradation of organic pollutants. Polyvinylpyrrolidone induces selective reduction of noble metal precursors on AgCl while leaving AgCl intact. The extended composition of the decorating NPs red-shifts the absorption band to 550–650 nm, which allows the catalysts to take advantage of more energy in the visible range for improved efficiency. Furthermore, we control the structures of the [email protected] NPs, and investigate their correlation with photocatalytic properties. The versatility, chemical stability, and practical application of the [email protected] NPs are demonstrated using various organic pollutants, recycling experiments, and natural aqueous media, respectively. Our fundamental investigation on the synthesis and applications of AgCl-based nano-photocatalysts is highly valuable for designing plasmonic photocatalysts and expanding their utilization. View Full-Text
Keywords: AgCl; gold; silver; nanoparticle; surface plasmon resonance; photocatalyst; visible light; organic pollutant; PVP AgCl; gold; silver; nanoparticle; surface plasmon resonance; photocatalyst; visible light; organic pollutant; PVP
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MDPI and ACS Style

Ryu, H.-J.; Kim, H.-L.; Joo, J.H.; Lee, J.-S. Structurally and Compositionally Tunable Absorption Properties of [email protected] Nanocatalysts for Plasmonic Photocatalytic Degradation of Environmental Pollutants. Catalysts 2020, 10, 405. https://doi.org/10.3390/catal10040405

AMA Style

Ryu H-J, Kim H-L, Joo JH, Lee J-S. Structurally and Compositionally Tunable Absorption Properties of [email protected] Nanocatalysts for Plasmonic Photocatalytic Degradation of Environmental Pollutants. Catalysts. 2020; 10(4):405. https://doi.org/10.3390/catal10040405

Chicago/Turabian Style

Ryu, Han-Jung, Ha-Lin Kim, Jang H. Joo, and Jae-Seung Lee. 2020. "Structurally and Compositionally Tunable Absorption Properties of [email protected] Nanocatalysts for Plasmonic Photocatalytic Degradation of Environmental Pollutants" Catalysts 10, no. 4: 405. https://doi.org/10.3390/catal10040405

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