Holey graphene oxide membranes containing both nanopores and nanochannels for highly efficient harvesting of water evaporation energy

Lee, Ki Hyun; Kang, Dong Jun; Eom, Wonsik; Lee, Hyeonhoo; Han, Tae Hee

doi:10.1016/j.cej.2021.132759

Cited by 43 publications

(42 citation statements)

References 47 publications

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“…In a single device based on the holey GO nanosheet, the electrical output reached B0.44 V, contributed mostly by the streaming potential. 42 Metal oxides are recognized to be charged in aqueous suspensions, benefiting from the amphoteric dissociation of surface hydroxyl groups or adsorption of hydroxocomplexes derived from hydrolysis products. 43 The high Zeta potentials make metal oxides, especially in the form of nanoparticles and nanowires, promising for EEDs to capture ambient heat through natural evaporation.…”

Section: Materials Classification and Morphologymentioning

confidence: 99%

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Hydrovoltaic technology: from mechanism to applications

et al. 2022

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Section: Materials Classification and Morphologymentioning

confidence: 99%

“…In a single device based on the holey GO nanosheet, the electrical output reached ∼0.44 V, contributed mostly by the streaming potential. 42…”

Section: Water Evaporation For Energy Harvestingmentioning

confidence: 99%

Hydrovoltaic technology: from mechanism to applications

et al. 2022

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“…[ 30 ] Except for the modification of GO, the structure design is also a feasible subject. [ 26 ] As demonstrated in Figure 3E, printed honeycomb‐structured rGO film increases the transmissibility of water molecules and accelerates the evaporation rate under the design of the water channel, achieving a V oc of 0.83 V. [ 62 ]…”

Section: Selection Of Materials For Harvesting Energy From Water Evap...mentioning

confidence: 99%

“…Lamellar nanosheets have attracted a lot of attention due to their large specific surface area, high surface charge density, and vertical pore structure. Other emerging 2D layered nanosheets, such as graphene [26] and MXene, [99,100] are also used to fabricate EHDs. However, part of the mess will affect the direction of the water flow and the internal charge transfer.…”

Section: Lamellarmentioning

confidence: 99%

Materials for evaporation‐driven hydrovoltaic technology

Zheng

Chu

Fang

et al. 2022

Interdisciplinary Materials

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Water constitutes the largest energy carrier on earth, absorbing more than 70% of the solar energy received by the earth's surface, yet its low exploitation has been a constant concern. The hydrovoltaic effect is an emerging technology that generates electricity through the direct interaction between nanomaterials and water of various forms (raindrops, waves, flows, moisture, and natural evaporation). Especially, the evaporation-driven hydrovoltaic effect is a spontaneous and ubiquitous process that can directly convert thermal energy from the surrounding environment into electricity without the demand for additional mechanical work, which shows unique advantages compared with other hydrovoltaic effects. A variety of nanostructured materials have been steadily developed for evaporation-driven hydrovoltaic devices (EHDs) in recent years. However, there has been a lack of a clear specification on the selection and design of materials for improving device performance. Herein, we first analyze the mechanisms of EHDs followed by a summarization of the recent advances in materials, including carbon materials, biomass-based materials, metal oxides, composite materials, and others. We then discuss the strategies for improving the energy conversion efficiency and the output power in terms of structural design, surface modification, and interface treatment. Finally, we provide an outlook on the potential applications of electricity generation, sensors, and desalination technology, as well as the challenges and prospects for the development of this emerging technology in the future.

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“…When water passes through the membrane, some of the water evaporates due to friction. In [ 156 ], the authors created a nanocapillary membrane with nanopores and nanochannels. Several such membranes can charge a 1-F supercapacitor and power LEDs (2 V·20 mA).…”

Section: Graphene and Graphene Oxidementioning

confidence: 99%

Recent Advances on Membranes for Water Purification Based on Carbon Nanomaterials

et al. 2022

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Every year the problem of water purification becomes more relevant. This is due to the continuous increase in the level of pollution of natural water sources, an increase in the population, and sharp climatic changes. The growth in demand for affordable and clean water is not always comparable to the supply that exists in the water treatment market. In addition, the amount of water pollution increases with the increase in production capacity, the purification of which cannot be fully handled by conventional processes. However, the application of novel nanomaterials will enhance the characteristics of water treatment processes which are one of the most important technological problems. In this review, we considered the application of carbon nanomaterials in membrane water purification. Carbon nanofibers, carbon nanotubes, graphite, graphene oxide, and activated carbon were analyzed as promising materials for membranes. The problems associated with the application of carbon nanomaterials in membrane processes and ways to solve them were discussed. Their efficiency, properties, and characteristics as a modifier for membranes were analyzed. The potential directions, opportunities and challenges for application of various carbon nanomaterials were suggested.

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Holey graphene oxide membranes containing both nanopores and nanochannels for highly efficient harvesting of water evaporation energy

Cited by 43 publications

References 47 publications

Hydrovoltaic technology: from mechanism to applications

Hydrovoltaic technology: from mechanism to applications

Materials for evaporation‐driven hydrovoltaic technology

Recent Advances on Membranes for Water Purification Based on Carbon Nanomaterials

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