Reduced graphene oxide anodes for potential application in algae biophotovoltaic platforms

Area of Science:

• Renewable Energy
• Materials Science
• Biotechnology

Background:

• Conventional energy sources are finite, driving demand for renewable alternatives.
• Biophotovoltaic (BPV) devices using algae offer a promising avenue for solar energy harvesting.
• Indium tin oxide (ITO) is commonly used in BPV anodes, but limitations exist.

Purpose of the Study:

• To evaluate reduced graphene oxide (RGO) as a potential anode material for BPV devices.
• To compare the performance of algae biofilms grown on RGO versus ITO anodes.
• To assess the efficiency and power output improvements offered by RGO.

Main Methods:

• Algae biofilms were cultivated on both RGO and ITO anode materials.
• The performance of the BPV devices with different anodes was measured.
• Key metrics including peak power and efficiency were analyzed.

Main Results:

• The RGO electrode achieved an improved peak power of 0.1481 mW/m².
• An efficiency increase of 119% was observed when using RGO anodes.
• RGO demonstrated superior performance compared to ITO in this BPV application.

Conclusions:

• Reduced graphene oxide (RGO) shows significant potential as a high-performance anode material for BPV systems.
• RGO's electrical properties and biocompatibility enhance energy conversion in algae-based devices.
• This research paves the way for more efficient biofilm-derived energy systems using advanced anode materials.