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Atmospheric water, as one of the most abundant natural resources on Earth, has attracted huge research interest in the field of water harvesting and energy harvesting and conversion owing its environmental friendliness and easy access. The developments of new materials have seen advanced technologies that can extract water and energy out of this long-neglected resource, suggesting a promising and sustainable approach to address the water and energy crises over the world. Carbon-based functional materials have been considered to be indispensable materials for atmospheric water utilization due to their large surface area, excellent adsorption performance, and higher surface activity. In this review, first, we analyze the interaction between carbon-based functional materials and atmospheric water molecular. Then, technologies developed in recent years for atmospheric water utilization based on carbon-based functional materials are reviewed, mainly focusing on atmospheric water harvesting, moisture-enabled electricity generation, and moisture-responsive actuation. Finally, the remaining challenges and some tentative suggestions possibly guiding developments are proposed, which may pave a way for a bright future of carbon-based functional material in the utilization of atmospheric water.
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