渗透力
正渗透
缓压渗透
废水
环境工程
膜
生物污染
污染物
污水处理
发电
材料科学
杰纳斯
纳米技术
化学
环境科学
反渗透
功率(物理)
生物化学
物理
有机化学
量子力学
作者
Li Zhang,Shangfa Pan,Yang Liu,Lei Yu,Tao Huang,J. Xia,Xueli Liu,Jun Gao,Kunyan Sui,Lei Jiang
出处
期刊:Water Research
[Elsevier]
日期:2023-08-01
卷期号:242: 120285-120285
被引量:5
标识
DOI:10.1016/j.watres.2023.120285
摘要
Nanofluidic membranes have shown great promise in harvesting osmotic power. Yet, previous studies extensively focused on osmotic energy released by the mixing of seawater and river water, while there exist many other osmotic energy sources, such as the mixing of wastewater with other water. However, harvesting the osmotic power of wastewater is highly challenging because it requires the membranes to have environmental remediation capabilities to avoid pollution and biofouling, which has not been satisfied by previous nanofluidic materials. In this work, we demonstrate that a Janus carbon nitride membrane can be used for simultaneous power generation and water purification. The Janus structure of the membrane generates asymmetric band structure and therefore a built-in electric field, facilitating electron-hole separation. As a result, the membrane shows strong photocatalytic capability, which efficiently degrades organic pollutants and kills microorganisms. In particular, the built-in electric field also facilitates ionic transport, significantly promoting the osmotic power density up to 30 W/m2 under simulated sunlight illumination. The power generation performance can be robustly kept with or without the presence of pollutants. This study will shed light on the development of multi-functional power generation materials for the comprehensive utilization of industrial wastewater as well as domestic sewage.
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