Plasmon-Induced Charge Separation-Driven Energy Storage Photocatalyst with Silver Nanoparticles/Nickel Oxide

Area of Science:

• Materials Science
• Nanotechnology
• Photocatalysis

Background:

• Developing efficient visible light-responsive photocatalysts is crucial for sustainable energy solutions.
• Oxidative energy storage in photocatalysts remains a challenge, requiring effective charge separation mechanisms.

Purpose of the Study:

• To develop novel visible light-responsive oxidative energy storage photocatalysts.
• To investigate plasmon-induced charge separation (PICS) for enhanced photocatalytic performance.
• To explore the potential applications of these materials in continuous energy storage and sensing.

Main Methods:

• Integration of silver nanoparticles (AgNPs) with p-type nickel oxide (NiO).
• Utilizing localized surface plasmon resonance (LSPR) excitation for photoresponse.
• Spectroscopic analysis to confirm charge transfer and oxidation processes.

Main Results:

• Demonstrated photoresponse under LSPR excitation, indicating efficient charge separation at the AgNP/NiO interface.
• Confirmed positive charge transfer from AgNPs to NiO, leading to oxidative energy storage via NiO oxidation.
• Showcased repeatable electrochemical discharge of stored oxidative energy.

Conclusions:

• A simple and effective design for visible light-driven oxidative energy storage photocatalysts was achieved.
• The AgNP/NiO system demonstrates potential for continuous day-and-night photocatalysis.
• Proposed applications include photochromic sensors and advanced energy storage systems.