Liu Haoyu, Pang Huaipeng, Yang Xinyu, Guo Wenhao, Xi Hongyan, Ji Xueli, Li Lin, Meng Fanlu
School of Materials Science and Engineering, Ocean University of China, Qingdao 266404, China.
Electron Microscopy Center, Jilin University, Changchun, 130012, China.
Mater Horiz. 2024 Nov 11;11(22):5740-5751. doi: 10.1039/d4mh00798k.
Solar-driven interfacial evaporation has emerged as a promising avenue for clean water production, leveraging solar energy to extract water vapor from salty and polluted water sources. However, a critical challenge remains, during the photothermal evaporation process, organic pollutants and small water-soluble molecules can transfer into distilled steam, degrading the purity of the collected water. Herein, we develop a multifunctional clean water generation system that integrates photothermal conversion, adsorptive filtration and subsequent photocatalytic purification within a unified platform. This system features an inner hierarchical porous metal-carbon layer derived from ZIF-67 carbonization, seamlessly bridging a wood carbon scaffold and BiOBr nanosheets (BiOBr@ZCW) to smoothly facilitate synergistic actions between photothermal evaporation and adsorption-photodegradation processes. This BiOBr@ZCW configuration not only minimizes thermal dissipation, facilitating a high evaporation rate of 1.67 kg m h and an efficiency of 85% under standard solar irradiation but also enhances the photocatalytic degradation of the rhodamine B organic pollutant with a remarkable 98.43% degradation rate within just 20 minutes. This integrated system offers a robust solution to the challenges of water purification by ensuring both high efficiency in solar steam generation and effective pollutant degradation.
太阳能驱动的界面蒸发已成为一种很有前景的清洁水生产途径，利用太阳能从咸水和受污染水源中提取水蒸气。然而，一个关键挑战仍然存在，在光热蒸发过程中，有机污染物和小的水溶性分子会转移到蒸馏蒸汽中，降低收集到的水的纯度。在此，我们开发了一种多功能清洁水生成系统，该系统在一个统一的平台内集成了光热转换、吸附过滤和随后的光催化净化功能。该系统具有由ZIF-67碳化衍生的内部分级多孔金属碳层，无缝连接木碳支架和BiOBr纳米片（BiOBr@ZCW），以顺利促进光热蒸发与吸附-光降解过程之间的协同作用。这种BiOBr@ZCW结构不仅最大限度地减少了热耗散，在标准太阳辐射下实现了1.67 kg m⁻² h⁻¹的高蒸发速率和85%的效率，而且还提高了罗丹明B有机污染物的光催化降解效率，在短短20分钟内降解率达到了98.43%。这种集成系统通过确保太阳能蒸汽生成的高效率和有效的污染物降解，为水净化挑战提供了一个强大的解决方案。
