Difunctional MOF-wrapped graphene membranes for efficient photothermal membrane distillation and VOCs interception

Lou, Mengmeng; Li, Jingzi; Zhu, Xiaowei; Chen, Jingchao; Zhang, Xiaoyu; Fang, Xiaofeng; Li, Fang

doi:10.1016/j.memsci.2023.121592

Cited by 10 publications

(5 citation statements)

References 63 publications

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“…The Alg/Al PTFE membrane retained an excellent phenol removal efficiency of 98.69% even at a high feed temperature of 75 °C, manifesting its outstanding structural integrity and stable interception performance. Figure E presents the comparison of the phenol removal efficiency of the Alg/Al PTFE membrane with other separation technologies reported in the literature. ,,,,− The Alg/Al PTFE membrane exhibited high phenol removal capability regardless of its initial concentrations, benefiting from the dense and hydratable Alg/Al hydrogel layer (details will be discussed in the mechanism section). As shown in Figures F and S13, the Alg/Al PTFE membrane offered sufficient rejections (∼99%) toward various VOCs, except for aniline with a relatively low rejection of ∼93%.…”

Section: Resultsmentioning

confidence: 99%

“…Currently, extensive efforts have been devoted to developing advanced membranes such as superhydrophobic, omniphobic and Janus membranes or intensifying MD process via pressure or electric field assistance to deal with membrane wetting, fouling and scaling issues. ,− However, there is hardly MD membrane that can efficiently intercept volatile substances, restricted by the high volatility, hydrophobicity and small molecular size of VOCs. ,, Recently, nanocomposite membranes displayed good decomposition or interception of low concentration VOCs in the MD process with the assistance of additional oxidants, light and electric field. − Dual-layer thin film composite (TFC) membrane with VOCs rejection of ∼90% was developed for freshwater recovery from VOCs containing saline feed via the MD process . In addition, solar-driven evaporators were also designed to achieve VOCs–water separation using nanomaterial composite membranes (e.g., MOF and TiO 2– x ) and polymer membranes based on different interception mechanisms. − The above successful cases unlocked possibilities for the interception of VOCs in the evaporation process.…”

Section: Introductionmentioning

confidence: 99%

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Hypercrosslinked Hydrogel Composite Membranes Targeted for Removal of Volatile Organic Compounds via Selective Solution-Diffusion in Membrane Distillation

Zhang,

Yuan,

Zhu

et al. 2024

Environ. Sci. Technol.

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Membrane distillation (MD) has attracted considerable interest in hypersaline wastewater treatment. However, its practicability is severely impeded by the ineffective interception of volatile organic compounds (VOCs), which seriously affects the product water quality. Herein, a hypercrosslinked alginate (Alg)/ aluminum (Al) hydrogel composite membrane is facilely fabricated via Alg pregel formation and ionic crosslinking for efficient VOC interception. The obtained MD membrane shows a sufficient phenol rejection of 99.52% at the phenol concentration of 100 ppm, which is the highest rejection among the reported MD membranes. Moreover, the hydrogel composite membrane maintains a high phenol interception (>99%), regardless of the feed temperature, initial phenol concentration, and operating time. Diffusion experiments and molecular dynamics simulation verify that the selective diffusion is the dominant mechanism for VOCs− water separation. Phenol experiences a higher energy barrier to pass through the dense hydrogel layer compared to water molecules as the stronger interaction between phenol−Alg compared with water−Alg. Benefited from the dense and hydratable Alg/Al hydrogel layer, the composite membrane also exhibits robust resistance to wetting and fouling during long-term operation. The superior VOCs removal efficiency and excellent durability endow the hydrogel composite membrane with a promising application for treating complex wastewater containing both volatile and nonvolatile contaminants.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hypercrosslinked Hydrogel Composite Membranes Targeted for Removal of Volatile Organic Compounds via Selective Solution-Diffusion in Membrane Distillation

Zhang,

Yuan,

Zhu

et al. 2024

Environ. Sci. Technol.

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“…Recently, thermoplasmonic effects have been successfully exploited for photothermal cancer therapy [80,[83][84][85][86][87][88], photothermal actuators [89], nanofurnaces for heterogeneous catalysis [90], solar-driven hydrogen generation [91][92][93], and solar-driven water evaporation [94][95][96][97][98][99][100][101]. Interestingly, the embodiment of thermoplasmonics in membranes has gained great attention demonstrating the potential to mitigate the water-energy nexus in MD by reducing the anthropic energy input required to heat-up the feed and increasing the productivity of the desalination operation by overcoming the TP [102][103][104][105][106][107][108][109].…”

Section: Statusmentioning

confidence: 99%

2024 roadmap on membrane desalination technology at the water-energy nexus

Politano,

Al-Juboori,

Alnajdi

et al. 2024

J. Phys. Energy

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Water and energy are two strategic drivers of sustainable development, intimately interlaced and vital for a secure future of humanity. Given that water resources are limited, whereas global population and energy demand are exponentially growing, the competitive balance between these resources, referred to as the water-energy nexus – is receiving renewed focus.The desalination industry alleviates water stress by producing freshwater from saline sources, such as seawater, brackish or groundwater. Since the last decade, the market has been dominated by membrane desalination technology, offering significative advantages over thermal processes, such as lower energy demand, easy process control and scale-up, modularity for flexible productivity, and feasibility of synergic integration of different membrane operations. The exciting new frontier of sustainable mining of seawater concentrates is accelerating the appearance of a plethora of innovative membrane materials and methods for brine dehydration and selective extraction of trace ions, although under the sword of Damocles represented by cost feasibility for reliable commercial application. On the other hand, among several emerging technologies, reverse electrodialysis (SGP-RED) was already proven capable – at least at the kW scale–of turning the chemical potential difference between river water, brackish water, and seawater into electrical energy. Efforts to develop a next generation of Ion Exchange Membranes exhibiting high perm-selectivity (especially toward monovalent ions) and low electrical resistance, to improve system engineering and to optimize operational conditions, pursue the goal of enhancing the low power density so far achievable (in the order of a few W per m2).This Roadmap takes the form of a series of short contributions written independently by worldwide experts in the topic. Collectively, such contributions provide a comprehensive picture of the current state of the art in membrane science and technology at the water-energy nexus, and how it is expected to develop in the future

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“…More recently, Lou et al [139] developed an MOF-wrapped graphene-based bifunctional photothermal membrane with high thermal efficiency. It was used for the photothermal MD (PMD) process.…”

Section: Graphene In Membrane Distillationmentioning

confidence: 99%

Two-Dimensional Materials: From Discovery to Application in Membrane Distillation/Crystallization Processes

Frappa,

Alessandro,

Macedonio

et al. 2023

Chemistry

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Sustainable water desalination and purification membrane processes require new practical pathways to improve their efficiency. To this end, the inclusion of two-dimensional materials in membrane structure has proven to have a significant impact in various applications. In particular, in processes such as membrane distillation and crystallization, these materials, thanks to their characteristics, help to increase the recovery of clean water and, at the same time, to improve the quality and the production of the recovered salts. Therefore, a fundamental aspect of obtaining 2D materials with certain characteristics is the technique used for the preparation. This review provides a broad discussion on the preparation and proprieties of 2D materials, including examples of organic structures (such as graphene and structures containing transition metals and organic metals). Finally, the critical challenges, future research directions, and the opportunities for developing advanced membranes based on 2D materials are outlined.

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Difunctional MOF-wrapped graphene membranes for efficient photothermal membrane distillation and VOCs interception

Cited by 10 publications

References 63 publications

Hypercrosslinked Hydrogel Composite Membranes Targeted for Removal of Volatile Organic Compounds via Selective Solution-Diffusion in Membrane Distillation

Hypercrosslinked Hydrogel Composite Membranes Targeted for Removal of Volatile Organic Compounds via Selective Solution-Diffusion in Membrane Distillation

2024 roadmap on membrane desalination technology at the water-energy nexus

Two-Dimensional Materials: From Discovery to Application in Membrane Distillation/Crystallization Processes

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