期刊
CCS CHEMISTRY
卷 3, 期 4, 页码 1325-1335出版社
CHINESE CHEMICAL SOC
DOI: 10.31635/ccschem.020.202000296
关键词
active ion transport; light; energy conversion; 2D MXene nanofluids; photothermal
资金
- National Key R&D Program of China [2017YFA0206904, 2017YFA0206900]
- National Natural Science Foundation of China [21625303, 21905287, 51673206, 21988102]
- Beijing Natural Science Foundation [2194088]
- Strategic Priority Research Program of the Chinese Academy of Science [XDA21010213]
- Key Research Program of the Chinese Academy of Sciences [QYZDY-SSW-SLH014]
This study demonstrates a novel nanofluidic regulation strategy based on light-induced heat-driven active ion transport through the lamellar MXene membrane, significantly enhancing osmotic energy conversion efficiency. The proposed system offers a new avenue of light-controlled ionic transport for various applications in ion gathering, desalination, and energy conversion.
Osmotic energy from the ocean, also called blue energy, serves as a clean, renewable, and vast energy source for the energy demands of the world. Reverse electrodialysis-based blue energy harvesting via ion-selective membranes, by the regulation and manipulation of directional ion transport, has been greatly developed recently. In particular, light has been employed to enhance directional ion transport for energy conversion through an increase in photo-induced surface charge. Here, the authors demonstrate a novel nanofluidic regulation strategy based on the phenomenon of light-induced heat-driven active ion transport through the lamellar MXene membrane. Due to the great light-induced heat effect, a temperature gradient appears as soon as illumination is applied to an off-center position, inducing an actively temperature gradient-driven ionic species transport. By employing this phenomenon, the authors conducted light-induced heat-enhanced osmotic energy conversion and doubled the osmotic energy conversion power density. This study has extended the scope of light-enhanced osmotic energy conversion and could further bring other photothermal materials into this field. Furthermore, the proposed system provides a new avenue of light-controlled ionic transport for ion gathering, desalination, and energy conversion applications.
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