Quinoxaline-6,7-dicarboxylate-based Photothermal Polymers Inspired Multifunctional Hydrogels for High-Efficient...

Area of Science:

• Materials Science
• Environmental Science
• Chemistry

Background:

• Freshwater scarcity necessitates sustainable water purification methods.
• Developing advanced hydrogels for efficient solar-thermal conversion and pollutant removal is challenging.

Purpose of the Study:

• To synthesize novel conjugated polymers for enhanced solar-driven water purification.
• To fabricate a multifunctional solar-absorbing hydrogel (SAG-Se) with high performance.
• To investigate integrated freshwater and electricity generation capabilities.

Main Methods:

• Molecular engineering of diketopyrrolopyrrole with benzo[1,2-c:4,5-c']bis[1,2,5]thiadiazole derivatives.
• Fabrication of PDPP-SeQ micelles within a polyethylenimine/polyvinyl alcohol matrix to create SAG-Se.
• Performance evaluation of photothermal conversion efficiency, water production rate, and contaminant removal.

Main Results:

• Optimized polymers exhibited extended light absorption and minimized radiative decay.
• PDPP-SeQ achieved 26.71% photothermal conversion efficiency.
• SAG-Se demonstrated a record water production rate of 10.18 kg/m²·h and concurrent 55 mV electricity generation.

Conclusions:

• The developed SAG-Se hydrogel offers a highly efficient and stable platform for solar water purification and energy generation.
• This research provides insights into designing high-performance photothermal materials for integrated water-energy systems.
• The portable and robust SAG-Se system is suitable for addressing water needs in remote regions.