Light-Boosted Osmotic Energy Conversion and Ion Pumping through a Graphdiyne Oxide-Based Membrane

Area of Science:

• Materials Science
• Nanotechnology
• Energy Conversion

Background:

• Two-dimensional (2D) membranes are key for nanofluidic energy conversion.
• Current limitations include poor light responsivity and selectivity-flux trade-offs, hindering power density.

Purpose of the Study:

• To investigate light-pumping ion transport in graphdiyne oxide (GDYO) for improved solar-osmotic energy conversion.
• To overcome limitations in existing nanofluidic energy platforms.

Main Methods:

• Utilized graphdiyne oxide (GDYO) with a unique carbon hybrid skeleton.
• Employed molecular dynamics simulations to analyze ion transport mechanisms.
• Investigated coupled photon-electron-ion transport behavior in the GDYO system.

Main Results:

• GDYO demonstrated sensitive photoelectric responsivity and high-speed cation pathways.
• Simulations confirmed an absorption-acceleration mechanism promoting cation transport.
• Achieved a 195% increase in osmotic power density, reaching 11.91 W m⁻².
• Demonstrated flexible, unidirectional ion movement driven by light energy.

Conclusions:

• GDYO membranes offer a promising platform for efficient solar-osmotic energy conversion.
• The material's properties overcome key limitations in current nanofluidic energy devices.
• Engineered light-responsive ion transport in GDYO significantly enhances power generation.