Floating MMT/MXene janus membrane for solar steam generation and mechanism of improving water transportation by DFT calculation

Ai, Zhong; Zhao, Yunliang; Chen, Licai; Wen, Tong; Song, Shaoxian; Zhang, Tingting

doi:10.1016/j.seppur.2022.121918

Cited by 13 publications

(8 citation statements)

References 33 publications

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“…It confirms the successful formation of the PDA/PEI copolymer layer on the substrate surface. As for the M-MMT membrane, a typical characteristic band of 3620 cm –1 attributed to the stretching vibration of crystalline water and interlayer water could be observed . The characteristic band at 1019 and 915 cm –1 could be ascribed to the stretching vibration of Si–O–Si and Al–O, respectively .…”

Section: Resultsmentioning

confidence: 84%

“…The domain-limiting effect of interlayer channels promises the ability of a 2D nanomaterial membrane to control the internal transport rates of ions with different sizes and charges by their interlayer distance and surface properties, such as surface charge density and polarity. − The sub-micrometer cross-layer channels could further amplify the domain-limiting effect. These properties demonstrate the potentials of a 2D nanomaterial membrane applied to ion separation. , Montmorillonite (MMT) nanosheets could be easily prepared from a natural MMT mine. , The low-cost and pollution-free production process of MMT nanosheets guarantees its wide use potential in ion separation. However, MMT consists of negatively charged hydrated magnesium-aluminosilicate-layered flakes and interlaminar cations. − The naturally separated MMT nanosheets are negatively charged, which is inefficient in the separation of mono- and divalent cations without charge modulation.…”

Section: Introductionmentioning

confidence: 82%

“…As for the M-MMT membrane, a typical characteristic band of 3620 cm −1 attributed to the stretching vibration of crystalline water and interlayer water could be observed. 34 The characteristic band at 1019 and 915 cm −1 could be ascribed to the stretching vibration of Si−O−Si and Al−O, respectively. 55 FTIR spectra of the PP-X membranes are shown in Figure 3d.…”

Section: Surface Morphologies and Microstructure Of Mmt Nanosheets An...mentioning

confidence: 98%

“…32,33 Montmorillonite (MMT) nanosheets could be easily prepared from a natural MMT mine. 34,35 The low-cost and pollution-free production process of MMT nanosheets guarantees its wide use potential in ion separation. However, MMT consists of negatively charged hydrated magnesium-aluminosilicate-layered flakes and interlaminar cations.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhanced Mono/Divalent Ion Separation via Charged Interlayer Channels in Montmorillonite-Based Membranes

Han,

Sun,

Fan

et al. 2024

Environ. Sci. Technol.

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Efficient mono-and divalent ion separation is pivotal for environmental conservation and energy utilization. Two-dimensional (2D) materials featuring interlayer nanochannels exhibit unique water and ion transport properties, rendering them highly suitable for water treatment membranes. In this work, we incorporated polydopamine/ polyethylenimine (PDA/PEI) copolymers into 2D montmorillonite (MMT) nanosheet interlayer channels through electrostatic interactions and bioinspired bonding. A modified laminar structure was formed on the substrate surface via a straightforward vacuum filtration. The electrodialysis experiments reveal that these membranes could achieve monovalent permselectivity of 11.06 and Na + flux of 2.09 × 10 −8 mol cm −2 s −1 . The enhanced permselectivity results from the synergistic effect of electrostatic and steric hindrance effect. In addition, the interaction between the PDA/PEI copolymer and the MMT nanosheet ensures the long-term operational stability of the membranes. Theoretical simulations reveal that Na + has a lower migration energy barrier and higher migration rate for the modified MMT-based membrane compared to Mg 2+ . This work presents a novel approach for the development of monovalent permselective membranes.

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Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 82%

Section: Surface Morphologies and Microstructure Of Mmt Nanosheets An...mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Mono/Divalent Ion Separation via Charged Interlayer Channels in Montmorillonite-Based Membranes

Han,

Sun,

Fan

et al. 2024

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…[35] Alternatively, a sequential filtration process can be conducted to obtain a dual-layer photothermal membrane for enhanced performance or asymmetric design, such as a Janus configuration. [40,49,50] The filtration substrates may also be regarded as a part of Janus membranes in many cases. The advantages of Janus photothermal membranes in solar-driven evaporation will be discussed in the following section.…”

Section: Filtrating Photothermal Materials By Membranesmentioning

confidence: 99%

Membranes in Solar‐Driven Evaporation: Design Principles and Applications

Yang

et al. 2023

Adv Funct Materials

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Solar‐driven evaporation process brings exciting opportunities to recover clean water and resources in a sustainable way from diverse sources like seawater and wastewater. Separation membranes, as a vital material in many environmental and energy applications, can contribute significantly to this process owing to their structural features. However, the unique roles of membranes in solar evaporator construction and process design are seldom recognized and not summarized yet from scientific principles and application demands, which forms the motivation of this review. Herein, the roles of membranes in different processes based on solar‐driven evaporation are focused and the design principles of membrane materials and devices to meet the requirements of these applications are discussed. Fabrication strategies for photothermal membranes are introduced primarily, followed by a discussion on how to design membrane materials, devices, and processes to pursue optimal performance and realize advanced functions accompanied by evaporation. Furthermore, the future of this field is forecast with both challenges and opportunities.

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Recent Advances and Challenges of Metal‐Based Materials for Solar Steam Generation

Yu,

Zhang,

Wang

et al. 2023

Adv Funct Materials

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Global energy and environmental problems are becoming increasingly prominent, and the shortage of freshwater resources has been plaguing many countries and regions in the world. Solar steam generation (SSG) has emerged as a green, low‐cost and efficient strategy for freshwater production, which has attracted enormous attention in recent years. Furthermore, various photothermal materials and structural designs for the preparation of efficient SSG systems have been widely reported. Among them, metal‐based photothermal materials are abundant, and the exploration on metal‐based SSG systems is one of the important research directions. In this review, the basic concepts and design objectives of current metal‐based SSG systems are first introduced, as well as advances in the recent development of metal‐based photothermal materials, including photothermal mechanisms, and preparation methods. The evaluation criteria of the SSG system are further described. Then the development of metal‐based SSG systems is summarized in terms of structural design, functional modules (light absorption, thermal management, water transport, salt rejection, etc.), and potential applications (wastewater treatment, sterilization and other fields). Finally, the main challenges and future prospects of metal‐based SSG systems in basic research and practical applications are emphasized.

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Floating MMT/MXene janus membrane for solar steam generation and mechanism of improving water transportation by DFT calculation

Cited by 13 publications

References 33 publications

Enhanced Mono/Divalent Ion Separation via Charged Interlayer Channels in Montmorillonite-Based Membranes

Enhanced Mono/Divalent Ion Separation via Charged Interlayer Channels in Montmorillonite-Based Membranes

Membranes in Solar‐Driven Evaporation: Design Principles and Applications

Recent Advances and Challenges of Metal‐Based Materials for Solar Steam Generation

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