El Demellawi, Jehad K.
Alshareef, Husam N.
KAUST DepartmentEnvironmental Science and Engineering Program
Biological and Environmental Science and Engineering (BESE) Division
Material Science and Engineering
Physical Science and Engineering (PSE) Division
Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering Division (BESE), King Abdullah University of Science and Technology, (KAUST), Thuwal 23955-6900, Saudi Arabia
Material Science and Engineering Program
Permanent link to this recordhttp://hdl.handle.net/10754/675093
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AbstractClean water supply in off-grid locations remains a stumbling stone for socio-economic development in remote areas where solar energy is abundant. In this regard, several technologies have already introduced various solutions to the off-grid freshwater predicament; however, most of them are either costly or complex to operate. Nonetheless, photothermal membrane distillation (PMD) has emerged as a promising candidate with great potential to be autonomously driven by solar energy. Instead of using energy-intensive bulk feed heating in conventional MD systems, PMD membranes can directly harvest the incident solar light at the membrane interface as an alternative driving energy resource for the desalination process. Because of its excellent photothermal properties and stability in ionic environments, herein, Ti3C2Tx MXene was coated onto commercial polytetrafluoroethylene (PTFE) membranes to allow for a self-heated PMD process. An average water vapor flux of 0.77 kg/m2 h with an excellent temporal response under intermitting lighting and a photothermal efficiency of 65.3% were achieved by the PMD membrane under one-sun irradiation for a feed salinity of 0.36 g/L. Naturally, the efficiency of the process decreased with higher feed concentrations due to the reduction of the evaporation rate and the scattering of incident sunlight toward the membrane photothermal surface, especially at rates above 10 g/L. Notably, with such performance, 1 m2 of the MXene-coated PMD membrane can fulfill the recommended daily potable water intake for a household, that is, ca. 6 L/day.
CitationMustakeem, M., El-Demellawi, J. K., Obaid, M., Ming, F., Alshareef, H. N., & Ghaffour, N. (2022). MXene-Coated Membranes for Autonomous Solar-Driven Desalination. ACS Applied Materials & Interfaces. doi:10.1021/acsami.1c20653
SponsorsThe research reported in this paper is supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia.
PublisherAmerican Chemical Society (ACS)
Except where otherwise noted, this item's license is described as This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsami.1c20653.