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Carbon Ink Enhanced Calcium Alginate-Based Hydrogel with Response Surface Methodology Optimized for Solar-Driven
Cai-Hua Liu1, Lei Xu1, Zhen-Yu Wang1
1Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, P. R. China.
ACS Applied Materials & Interfaces
|October 16, 2024
Summary
This study presents a novel hydrogel evaporator for efficient solar desalination. The developed IPCA hydrogel offers a sustainable solution for producing freshwater and purifying wastewater using solar energy.
Area of Science:
- Materials Science
- Environmental Science
- Chemical Engineering
Background:
- Global freshwater scarcity necessitates innovative water purification technologies.
- Solar-driven interfacial photothermal evaporation is a promising, eco-friendly method for desalination.
- Existing methods face challenges in efficiency and scalability.
Purpose of the Study:
- To develop and optimize a novel hydrogel-based solar evaporator (IPCA) for efficient seawater desalination.
- To evaluate the performance, stability, and pollutant removal capabilities of the IPCA hydrogel.
- To demonstrate a practical approach for solar water purification.
Main Methods:
- Preparation of IPCA hydrogel using carbon ink and PU sponge with calcium alginate.
- Optimization of IPCA synthesis parameters using Response Surface Methodology.
- Testing evaporation efficiency, photothermal conversion, salt resistance, and dye removal under simulated solar irradiation.
Main Results:
- The optimized IPCA hydrogel achieved a high evaporation efficiency of 3.779 kg m⁻² h⁻¹.
- Photothermal conversion efficiency reached up to 95.98% under one solar intensity.
- The material demonstrated excellent salt resistance over 10 cycles and effective removal of organic dyes.
Conclusions:
- The IPCA hydrogel is a highly efficient and stable solar evaporator for freshwater production.
- This technology offers a simple, green, and effective solution for practical solar desalination and wastewater treatment.
- The study presents a new pathway for developing advanced solar evaporators.
