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Hierarchical Engineering of Sorption-Based Atmospheric Water Harvesters
Yan Song1, Mengyue Zeng1, Xueyang Wang1
1National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210008, P. R. China.
Atmospheric water harvesting uses sorbent-based devices to capture water from air, offering a sustainable solution for decentralized water production. Optimizing materials and device design across multiple scales enhances efficiency for combating global water scarcity.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Global water scarcity necessitates innovative solutions for decentralized water production.
- Sorption-based atmospheric water harvesting (AWH) offers a promising approach to provide potable water.
- AWH technology integrates processes across multiple length scales, from nano to global.
Purpose of the Study:
- To provide a comprehensive overview of sorption-based atmospheric water harvesting.
- To highlight key advancements in materials, microstructures, and system designs for AWH.
- To outline future directions for practical and scalable AWH implementation.
Main Methods:
- Review of molecular-level sorbent optimizations for enhanced moisture capture and release.
- Discussion of microstructured surfaces for improved dropwise condensation in AWH.
- Analysis of system-level optimizations for high-yield, energy-efficient, and cost-effective AWH devices.
Main Results:
- Molecular design of sorbents significantly improves water sorption/desorption kinetics and capacity.
- Surface microstructuring promotes efficient dropwise condensation, crucial for water generation.
- System-level integration and optimization lead to enhanced water harvesting performance and reduced energy consumption.
Conclusions:
- Advancements in sorbent materials, surface engineering, and system design are critical for effective AWH.
- Multiscale optimization is essential for developing practical and sustainable sorption-based water harvesters.
- Continued research is needed to address challenges and enable widespread adoption of AWH technology.
