Intensifying Heat Using MOF‐Isolated Graphene for Solar‐Driven Seawater Desalination at 98% Solar‐to‐Thermal Efficiency

Han, Xuemei; Besteiro, Lucas V.; Koh, Charlynn Sher Lin; Lee, Hiang Kwee; Phang, In Yee; Phan‐Quang, Gia Chuong; Ng, Jing Yi; Sim, Howard Yi Fan; Lay, Chee Leng; Govorov, Alexander O.; Ling, Xing Yi

doi:10.1002/adfm.202008904

Cited by 120 publications

(67 citation statements)

References 46 publications

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“…Recently, Han et al achieved in situ growth of MOF on Zn 2+ -anchored graphene, wherein the insulating ZIF coating and interfacial cavity intensified the thermal concentration and heat localization, resulting in a record high efficiency of 96%. [109] Moreover, some other effective solar absorbers, like plasmonic metals and semiconductors, can be employed as coingredient with carbonbased materials to achieve better performance synergistically. For structure design, various aforementioned strategies can be served as reference and guidance for the following research.…”

Section: The Trade-off Between Sufficient Water Supply and Thermal Insulationmentioning

confidence: 99%

Carbon Materials for Solar Water Evaporation and Desalination

Guan

Guo

2021

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252

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generation efficiency by reducing heat loss to the bulk water as well as the environment. [22][23][24] As such, efforts have been made in finding the optimal materials with excellent photothermal conversion and heat localization functions, such as plasmonic metals and semiconductors. [25][26][27][28][29][30][31] Among all the possible candidates, carbon materials demonstrate competitive merits due to their intrinsic high solar absorption, excellent structural tunability, and great processability to fulfill the demanding requirements in interfacial SVG. Carbon materials, especially graphene family, carbon nanotubes, and amorphous carbon composed of graphite carbon, can intrinsically convert solar flux into thermal energy by the excitation-relaxation process, conjugating electrons in unsaturated bonds, which lays the foundation for functioning as solar absorbers. [32] Furthermore, the tunable structures of carbon materials confer various functional properties to the system. The solar absorption ability can be enhanced by tailoring carbon nanotubes into vertically aligned arrays, enabling broad-spectrum absorption by multiply reflections in elongated light paths. [33] The 3D carbon monoliths, such as carbon foam and aerogel, can achieve capillary water uptake and thermal insulation, wherein the interconnected pore structure plays a dominating role in these processes. [34][35][36] More importantly, carbon materials, with great processability in different treatment approaches, can serve as ingredients coupling with other materials to form structured composites, achieving cooperative functionalities beyond individuals. For instance, graphene can be grown on the metal skeleton by chemical vapor deposition (CVD) method, endowing the system with more developed pore structures; 3D printing can fabricate patterned architecture on the chosen matrix, propitious to the interfacial water/thermal behavior regulation. [36,37] Meanwhile, the high natural abundance of carbon materials leads to its easy accessibility, which outperforms other materials. With those attractive advantages, carbon materials are capable of advancing interfacial SVG. [38] In this Review, we systematically summarize the design principles and recent progress of carbon materials in interfacial SVG technology (Figure 1). The parallelism between carbon materials structures and required functions for interfacial SVG is discussed. We then examine the recent progress on different interfacial SVG systems composed of artificial carbon materials (pristine carbon system and carbon-containing composite) and biochar, with the focus on the structure-property relationship. Several strategies for antisalt-fouling in the SVG desalination systems are elaborated. Finally, we underline the remaining challenges and provide perspective directions for future investigations.Seawater desalination is viewed as a promising solution to world freshwater scarcity. Solar assisted desalination is proposed to overcome the high energy consumption in current desalination technologies, as it ...

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Section: The Trade-off Between Sufficient Water Supply and Thermal Insulationmentioning

confidence: 99%

Carbon Materials for Solar Water Evaporation and Desalination

Guan

Guo

2021

Small

252

104

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“…Carbon-based materials have broad application prospects in photothermal conversion due to their wide band absorption and excellent photothermal properties. [31][32][33][34][35] To quantitatively characterize the intrinsic optical properties of the adhesive heating patch, the transmission and reflection spectra in the solar spectrum range at Earth's surface were measured. As a reference, the overall light absorption of pure resin with a thickness of 1 mm is only about ≈12% in the whole solar spectrum due to the high transmittance (≈73%) and reflectance (≈15%) weighted with the AM 1.5G solar irradiance (Figure 3A).…”

Section: Photothermal Performancementioning

confidence: 99%

A sustainable, ultratough, and ready‐to‐use adhesive heating patch driven by solar/electric dual energy

Wang

Sun

2021

SusMat

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Developing a versatile and durable photothermal coating is of great interest for the future large-scale utilization of abundant solar energy. However, existing photothermal coatings that rely on the assembly of rigid solar absorbing nanomaterials have often limitations in both mechanical robustness and multienergy coupling for sustainable heating. Here, we report a ready-to-use and ultratough adhesive heating patch with the integrated abilities of photo-/electrothermal conversion and damage self-diagnosis. The patch is composed of interconnected carbon microfibers filtrated with photo-curable self-adhesive resin that can readily stick on the substrate, and postcuring rapidly toughens the patch resulting in high mechanical toughness (9.1 MJ/m 3 ), high electrical conductivity (5 S/cm), strong adhesion (0.7-4.6 MPa), as well as high solar-thermal conversion (∼ 85.3%) and Joule heating (81.6 • C/W) efficiencies. To demonstrate its application, the adhered patch on oil pipelines can rapidly reduce the viscosity of heavy crude oil to ∼100 Pa s under the action of solar radiation or Joule heating, allowing for oil's easy flow in pipelines in all-weather and, thus, alleviating the use of expensive fired heaters at heating stations.

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“…In addition, photothermal materials with high photothermal conversion efficiency, robust stability, and costefficiency are also of great signicance for the construction of SVGs. [12][13][14] Prussian blue (PB) is a prototype of mixed-valence transition-metal hexacyanoferrates, whose common parent structure is based on a cubic lattice and corresponds to the idealized composition Fe 4 [Fe(CN) 6 ] 3 . C^N acts as a bridge for Fe 2+ and Fe 3+ , i.e.…”

Section: Introductionmentioning

confidence: 99%