3D Graphene Composite Foams for Efficient and Stable Solar Desalination of High‐Salinity Brine

Author:

He Yujian1,Zhao Demin23,Wang Heng1,Gong Xiaole1,Ding Meichun23,Duan Zhenying2,Lin Tianhao2,Wei Rui2,Liu Jingquan1,Li Chenwei23ORCID

Affiliation:

1. College of Materials Science and Engineering Institute for Graphene Applied Technology Innovation Qingdao University Qingdao 266071 China

2. School of Chemistry and Pharmaceutical Engineering Shandong First Medical University & Shandong Academy of Medical Sciences Jinan 250117 Shandong China

3. Science and Technology Innovation Center Shandong First Medical University & Shandong Academy of Medical Sciences Jinan 250117 Shandong China

Abstract

Solar‐driven interfacial evaporation (SIE) is a promising desalination technology that utilizes solar energy and seawater. However, most SIE systems are limited by high cost, complex fabrication, and low salt tolerance. Herein, a simple method is presented for preparing a 3D graphene/carbon nanotubes/polypyrrole foam (GCPF) evaporator that exhibits high evaporation efficiency, excellent mechanical performance, and stable solar desalination of high‐salinity brine. The excellent processability of melamine foam enables the easy preparation of the 3D GCPF, which exhibits an enhanced evaporation rate of 4.012 kg m−2 h−1 and a photothermal conversion efficiency of 97.8% under one sun irradiation. Compared with the 2D sample, the GCPF‐3 evaporator utilizes solar energy more efficiently and maintains higher evaporation performance even when the light angle changes. Moreover, the 3D GCPF shows remarkable salt tolerance and durability, achieving a stable evaporation rate of 4.005 kg m−2 h−1 for 30 h with a salinity of 25 wt%, which is the best‐reported result among solar desalination systems. This work provides new insights into the design of 3D graphene composite foams and demonstrates their potential applications in continuous solar desalination.

Funder

National Natural Science Foundation of China

Postdoctoral Research Foundation of China

Natural Science Foundation of Shandong Province

Publisher

Wiley

Subject

Electrical and Electronic Engineering,Energy Engineering and Power Technology,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

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