Abstract
The escalating global resource and environmental crisis has intensified the urgent demand for efficiently extracting freshwater and critical metals from contaminated water sources, particularly nuclear-contaminated seawater. Herein, a biomass-based solar-powered hierarchical self-extraction micro-network (BSSM) is proposed and presented, an innovative system that seamlessly integrates solar-driven freshwater generation with highly selective cesium ion (Cs(+)) extraction. A bamboo-derived biochar with surface-loaded cobalt oxide nanoparticles (CoO NPs) is prepared and utilized to comprehensively validate the BSSM's efficacy. Leveraging hierarchically engineered microenvironments with authigenic multi-field synergies, the designed BSSM achieves a high freshwater production rate of 3.3 kg m(-2) day(-1) and an impressive Cs(+) extraction capacity of 34.58 mg g(-1). In conclusion, this study establishes a transformative paradigm for resource recovery, providing a scalable and eco-friendly panacea to address pressing global issues, including water scarcity, nuclear pollution, and resource security.