Excellent fog harvesting performance of liquid-infused nano-textured 3D frame

Pei, Wenle; Li, Jinghui; Guo, Zhenyu; Liu, Yufang; Gao, Chunlei; Zhong, Lieshuang; Wang, Shaomin; Hou, Yongping; Zheng, Yongmei

doi:10.1016/j.cej.2020.128180

Cited by 31 publications

(10 citation statements)

References 49 publications

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“…Figure b compares the efficiency of harp O-1 to the existing fog harvesters, revealing that our optimized fog harp exhibits the highest efficiency of any passive and practical fog harvester reported to date. A very recent report did measure a higher efficiency of η ≈ 25%, but this required a three-dimensional, nanostructured, lubricant-impregnated structure that is not scalable or durable for practical application. Another report obtained an efficiency of η ≈ 40%, but this required high voltage electrodes to ionize the fog droplets to promote an electrostatic attraction to the grounded harvester .…”

Section: Resultsmentioning

confidence: 99%

“…The harps with an asterisk are all the same harp but were useful for comparing other harps in multiple categories. (b) Comparison of our maximum harp efficiency to that of other passive fog harvesters from the literature: 3D superhydrophobic liquid-infused frame, 2D cactus kirigami, wire mesh, superhydrophilic mesh, and microgrooved wire . Harvesters with a solid diagonal fill are durable and scalable for practical use, while those with a dashed horizontal fill are not.…”

Section: Resultsmentioning

confidence: 99%

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Optimizing Fog Harps

Kowalski

Shi

Kennedy

et al. 2021

ACS Appl. Mater. Interfaces

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It has recently been demonstrated that harps harvest substantively more fog water than conventional mesh nets, but the optimal design for fog harps remains unknown. Here, we systematically vary key parameters of a scale-model fog harp, the wire material, wire pitch, and wire length, to find the optimal combination. We found stainless steel to not only be the best hydrophilic wire material but also nearly be as effective as Teflon-coated wires. The best choice for the wire pitch was coupled to the wire length, as the smallest pitch collected the most water for short harps but was hampered by tangling for taller harps. Accordingly, we use an elastocapillary wire tangling model to successfully predict the onset of tangling beyond a critical length for any given wire pitch. Combining what we learned, we achieved a water harvesting efficiency of 17% with an optimized stainless-steel harp, over three times higher than that of the current standard of a Raschel mesh. These results suggest that an optimal fog harp should feature hightension, uncoated wires within a large aspect ratio frame to avoid tangling and promote efficient and reliable fog harvesting.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Optimizing Fog Harps

Kowalski

Shi

Kennedy

et al. 2021

ACS Appl. Mater. Interfaces

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“…Inspired by biology, scientists have designed an abundance of biomimetic water-collecting structures. − Feng et al used spray method to make a hierarchical biomimetic surface for efficient fog harvesting . Pei et al designed a liquid-infused nano-textured 3D frame to harvest water . Zhong et al constructed an alternating nanoscale Janus cooperative copper mesh to harvest fog .…”

Section: Introductionmentioning

confidence: 99%

“…14 Pei et al designed a liquid-infused nano-textured 3D frame to harvest water. 15 Zhong et al constructed an alternating nanoscale Janus cooperative copper mesh to harvest fog. 16 In general, a fog-collection process can be divided into two major stages:…”

Section: Introductionmentioning

confidence: 99%

Environmentally Responsive Intelligent Dynamic Water Collector

Tang

Peng

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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Collecting water from fog flow is emerging as a promising solution to the water shortage problem. This work demonstrated a novel environmentally responsive water collector made from a self-prepared Janus polyvinyl alcohol sponge in combination with a two-way shape memory alloy spring, which transforms the traditional manner of static water collection into a dynamic one. The unidirectional water transport of the Janus structure together with the dynamic collection approach correspond to a 30.8% increase in the water-collection rate (WCR). The resultant WCR is up to 5.1 g/h, which ranks relatively high compared to similar studies. The light- and thermal-response capability, easy fabrication, and good cycling performance indicate that our devices could be utilized in a variety of applications. In this work, an efficient, intelligent adaptive, simple-preparation, precision-guided, and economical fog-collecting devices are recommended. Our work provides new insights on the design of high-efficient water collectors with practicability.

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“…The challenges of energy and clean water scarcity, especially in the remote areas, are becoming a more and more serious issue and would severely influence on economic and society development 1 , 2 . Currently, many technologies have been proposed to solve these problems 3 – 5 , for instance reverse systems 6 , 7 , multi-stage flash 8 , 9 , adsorbed treatment 10 , tiny-fog collection 2 , 11 , 12 and interface solar assisted evaporation 13 , 14 , among which solar assisted evaporation is regarded as a promising strategy to address the fresh water scarcity by treating the seawater on account of its economically, easy operation, renewable energy sources, sustainability and environment friendliness 15 , 16 . The biggest advantage of interfacial evaporation is high solar energy utilizing efficiency which attributes to its excellent energy management by remarkably suppressing heat loss to bulk water via thermal insulation foam between the bulk water and work interface, and good water management enabled by hydrophilic properties of photo-thermals conversion materials 13 , 17 – 19 .…”

Section: Introductionmentioning

confidence: 99%

Carbon fiber coated by quinoa cellulose nanosheet with outstanding scaled salt self-cleaning performance and purification of organic and antibiotic contaminated water

Yang

Suo

Zhao

et al. 2022

Sci Rep

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To date, various solar driven evaporation technologies have been developed for treatment of seawater and wastewater but with the threat from salt polluted and single treatment of seawater. Herein, we develop a multifunctional evaporator constructed by carbon fiber coated by quinoa cellulose nanosheet (CFQC) with outstanding self-cleaning performance and good purification property for treatment of organic and antibiotic polluted water. The resulting Zn-CFQC exhibits good light to thermal performance which can absorb about 86.95% lights in the range of UV–Vis–NIR (200–2500 nm); therefore, the wet and dry surface temperatures of Zn-CFQC are held at 62.1 and 124.3 °C respectively, and keep a speed of 3.2 kg m−2 h−1 for water evaporating under 1000 W m−2 illumination. Such good light-to-thermal capabilities can be mainly imputed to the unique surface microstructures of the carbon fiber which decorated by two-dimension cellulose and activated by ZnCl2. Additionally, Zn-CFQC shows good salt automatic-cleaning capability at night and corresponding mechanism has been simply elucidated according to the chemical potential theory. The method of treatment of carbon fiber opens a new way for commercial carbon fiber utilization of solar assisted water purification.

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Excellent fog harvesting performance of liquid-infused nano-textured 3D frame

Cited by 31 publications

References 49 publications

Optimizing Fog Harps

Optimizing Fog Harps

Environmentally Responsive Intelligent Dynamic Water Collector

Carbon fiber coated by quinoa cellulose nanosheet with outstanding scaled salt self-cleaning performance and purification of organic and antibiotic contaminated water

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