journal article·2018-05-11

Two-Dimensional Flexible Bilayer Janus Membrane for Advanced Photothermal Water Desalination

Yanbing Yang, Xiangdong Yang, Linna Fu, Mingchu Zou, Anyuan Cao, Yaping Du, Quan Yuan, Chun-Hua Yan

ACS Energy Letters· Volume 3· Issue 5
Publisher page

Abstract

Solar water evaporation is thought to be a promising solution to address the issues of global water scarcity. However, it is particularly difficult to achieve an idealized photothermal conversion membrane with all of the required structure characteristics such as wide spectrum absorption, ultrathin and porous, low thermal conductivity, and ease to scale up, thus leading to reduced water evaporation efficiency. Here, we designed a large-area bilayer Janus film by assembling gold nanorod (AuNR) onto the interconnected single-walled carbon nanotube (SWNT) porous film. The combined characteristics of high solar spectrum absorption, enhanced photothermal performance, thermal insulating feature, interconnected porous structure, and excellent mechanical performance enable the bilayer Janus film with a nearly 94% water evaporation efficiency under 5 kW m–2 solar irradiation and stable water generation capability during long-term illumination cycles as a water desalination membrane. Construction of the bilayer Janus film represents an effective strategy for developing multifunctional membranes for advanced desalination applications.
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Research context

OpenAlex topics: Solar-Powered Water Purification Methods · Membrane Separation Technologies · Surface Modification and Superhydrophobicity

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China

Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha 410082, China

Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China

College of Chemistry, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, China

Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU−HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University · Central Committee of the Communist Party of China

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