AgCu/TiO2 hot-electron device for solar water splitting: the mechanisms of LSPR and time-domain characterization

Sang, Lixia; Yu, Zebin; Wang, Chong; Zhao, Yüe

doi:10.1016/j.ijhydene.2022.12.182

Cited by 13 publications

(1 citation statement)

References 30 publications

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“…The alteration of UV light-responsive TiO 2 photocatalysts through various plasmonic materials has also been studied to enhance its fundamental properties. L. Sang et al reported that the bimetallic AgCu combined with TiO 2 exhibits higher photoelectrochemical activities for water splitting due to the transfer of hot electrons from Ag to Cu and the synergetic effect of diverse LSPRs [66]. The Fe-Ni-codoped and Ag-deposited anatase TiO 2 (Fe-Ni/Ag/TiO 2 ) nanomaterial was successfully synthesized using a straightforward one-pot solvothermal method.…”

Section: Ag Npsmentioning

confidence: 99%

Recent Progress of Ion-Modified TiO2 for Enhanced Photocatalytic Hydrogen Production

Zhao,

Tang,

Liu

et al. 2024

Molecules

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Harnessing solar energy to produce hydrogen through semiconductor-mediated photocatalytic water splitting is a promising avenue to address the challenges of energy scarcity and environmental degradation. Ever since Fujishima and Honda’s groundbreaking work in photocatalytic water splitting, titanium dioxide (TiO2) has garnered significant interest as a semiconductor photocatalyst, prized for its non-toxicity, affordability, superior photocatalytic activity, and robust chemical stability. Nonetheless, the efficacy of solar energy conversion is hampered by TiO2’s wide bandgap and the swift recombination of photogenerated carriers. In pursuit of enhancing TiO2’s photocatalytic prowess, a panoply of modification techniques has been explored over recent years. This work provides an extensive review of the strategies employed to augment TiO2’s performance in photocatalytic hydrogen production, with a special emphasis on foreign dopant incorporation. Firstly, we delve into metal doping as a key tactic to boost TiO2’s capacity for efficient hydrogen generation via water splitting. We elaborate on the premise that metal doping introduces discrete energy states within TiO2’s bandgap, thereby elevating its visible light photocatalytic activity. Following that, we evaluate the role of metal nanoparticles in modifying TiO2, hailed as one of the most effective strategies. Metal nanoparticles, serving as both photosensitizers and co-catalysts, display a pronounced affinity for visible light absorption and enhance the segregation and conveyance of photogenerated charge carriers, leading to remarkable photocatalytic outcomes. Furthermore, we consolidate perspectives on the nonmetal doping of TiO2, which tailors the material to harness visible light more efficiently and bolsters the separation and transfer of photogenerated carriers. The incorporation of various anions is summarized for their potential to propel TiO2’s photocatalytic capabilities. This review aspires to compile contemporary insights on ion-doped TiO2, propelling the efficacy of photocatalytic hydrogen evolution and anticipating forthcoming advancements. Our work aims to furnish an informative scaffold for crafting advanced TiO2-based photocatalysts tailored for water-splitting applications.

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Section: Ag Npsmentioning

confidence: 99%

Recent Progress of Ion-Modified TiO2 for Enhanced Photocatalytic Hydrogen Production

Zhao,

Tang,

Liu

et al. 2024

Molecules

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Plasmonic Hot Carrier‐Driven Photoelectrochemical Processes: Principle, Detection and Application

Song,

Roh,

Park

et al. 2024

Adv Materials Inter

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Utilizing hot carriers induced by surface plasmon resonance in solar energy conversion to chemical fuels is a crucial issue in the field of photocatalysis. To achieve practical efficiency in plasmonic hot carrier application to photocatalysts, it is essential to theoretically and experimentally understand the generation, relaxation, and transfer of hot carriers. Photoelectrochemical (PEC) processes can offer a pathway to investigate the transfer dynamics of hot electrons (or hot holes) and enhance the efficiency of both hot carrier transfer and catalytic activity. This work summarizes a theoretical and experimental understanding of the hot carrier effect, emphasizing the hot carrier transfer dynamics to investigate the exact role of hot carriers in PEC reactions. The principles of hot carrier detection, diverse applications of hot carrier‐based photocatalysis, and perspectives for possible future progress are discussed.

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Enhanced photocatalytic activity in AgCu-decorated ZnO nanoparticles under UV and sunlight

Noua,

Kaya,

Sigircik

et al. 2024

J Mater Sci: Mater Electron

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This study investigates the structural, morphological, and photocatalytic properties of monometallic (Ag and Cu) and bimetallic (AgCu) nanoparticles (NPs) incorporated into ZnO NPs and their photocatalytic performance. X-ray diffraction and Rietveld refinement were employed to analyze the structural characteristics, revealing the formation of a hexagonal wurtzite structure of ZnO and cubic phases of Ag and Cu within the metal-decorated NPs. Scanning electron microscopy provided visual evidence of the spherical morphology, with an average particle size of 50 nm. Energy-dispersive X-ray spectroscopy confirmed the successful deposition of Ag, Cu, and AgCu NPs onto the ZnO surface. The photocatalytic efficiency of the NPs was evaluated by the degradation of methylene blue dye under UV light at a wavelength of 254 nm under sunlight irradiation. Under UV light, the bimetallic AgCu/ZnO system exhibited exceptional performance, achieving a degradation rate of about 95% with 10% AgCu/ZnO. Conversely, under sunlight illumination, the monometallic Cu/ZnO and Ag/ZnO NPs exhibited outstanding photocatalytic properties, with degradation rates of about 99 and 98%, respectively. These findings underscore the influence of the light source on photocatalytic performance as well as the significance of the plasmonic effects and charge-transfer mechanisms.

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AgCu/TiO2 hot-electron device for solar water splitting: the mechanisms of LSPR and time-domain characterization

Cited by 13 publications

References 30 publications

Recent Progress of Ion-Modified TiO2 for Enhanced Photocatalytic Hydrogen Production

Recent Progress of Ion-Modified TiO2 for Enhanced Photocatalytic Hydrogen Production

Plasmonic Hot Carrier‐Driven Photoelectrochemical Processes: Principle, Detection and Application

Enhanced photocatalytic activity in AgCu-decorated ZnO nanoparticles under UV and sunlight

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