A High‐Performance, Low‐Tortuosity Wood‐Carbon Monolith Reactor

Wang, Yangang; Sun, Guanwu; Dai, Jiaqi; Chen, Guang; Morgenstern, Joe; Wang, Yanbin; Kang, Shifei; Zhu, Mingwei; Das, Siddhartha; Cui, Lifeng; Hu, Liangbing

doi:10.1002/adma.201604257

Cited by 119 publications

(76 citation statements)

References 51 publications

(55 reference statements)

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“…where A and B are start and end points of paths along the gel backbone intersecting respectively the upper and the lower box face in any Cartesian direction, λ (A, B) is the length of this path, while λ Euc (A, B) is the Euclidian distance between A and B; the angular brackets denote averaging over all such paths for a given configuration. This measure is often used to characterize flow rates through porous catalysts 45 or blood vessel networks, 46 where a large density of branch points, high degree of branching and non-erratic strands decrease the tortuosity of the network. [47][48][49] In Fig.…”

Section: Resultsmentioning

confidence: 99%

Using Patchy Particles to Prevent Local Rearrangements in Models of Non-equilibrium Colloidal Gels

et al. 2019

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Simple models based on isotropic interparticle attractions often fail to capture experimentally observed structures of colloidal gels formed through spinodal decomposition and subsequent arrest: the resulting gels are typically denser and less branched than their experimental counterparts. Here we simulate gels formed from soft particles with directional attractions ("patchy particles"), designed to inhibit lateral particle rearrangement after aggregation. We directly compare simulated structures with experimental colloidal gels made using soft attractive microgel particles, by employing a "skeletonization" method that reconstructs the 3-dimensional backbone from experiment or simulation. We show that including directional attractions with sufficient valency leads to strongly branched structures compared to isotropic models. Furthermore, combining isotropic and directional attractions provides additional control over aggregation kinetics and gel structure. Our results show that the inhibition of lateral particle rearrangements strongly affects the gel topology, and is an important effect to consider in computational models of colloidal gels.

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Section: Resultsmentioning

confidence: 99%

Using Patchy Particles to Prevent Local Rearrangements in Models of Non-equilibrium Colloidal Gels

et al. 2019

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“…In recent years, nanocarbon materials have shown attractive ability in the fields of photothermal utilization and interface evaporation due to their wide spectral absorption capacity and suitable adjustable porous structure 1–5. The factors affecting the interface evaporation are input energy, mass transfer, and thermal management.…”

Section: Introductionmentioning

confidence: 99%

Graphene–Carbon Composites for Solar and Low‐Voltage Powered Efficient Interfacial Evaporation

Liu

Wang

Bradley

et al. 2020

Advanced Sustainable Systems

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Nanocarbon materials have great potential for sustainable energy harvest and energy utilizations, such as solar thermal stream generation, and interfacial evaporation. However, the evaporation rate is far too low for practical applications. The technologies are not ready yet for industries requiring rapid, energy‐efficient, and low‐cost evaporation processes such as distillation and sterilization. A flexible ultrathin graphene–carbon cloth (CC)‐based carbon–carbon composites is prepared by in situ electrochemical reduction of graphene oxide. The carbon–carbon composite materials demonstrate high performance in photothermal evaporation; more importantly, all carbon‐based devices can also be operated as low‐voltage Joule heating elements in wide temperature range up to 389 °C. Even when a very low voltage of 3 V is applied, the graphene–CC heater can reach a very high heating speed up to 112 °C s–1, and a steady‐state temperature up to 292 °C within 10 s only. The low‐voltage heater promises to be the most effective solution for high‐speed interfacial evaporation since its evaporation rate can reach up to 45.87 kg m−2 h−1, enhanced by one order of magnitude compared to the best solar power photothermal seawater desalination devices ever reported.

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“…1,2 Optimized thermal management and water supply can greatly enhance the energy conversion efficiency. To this end, various materials [3][4][5][6][7] were investigated by researchers. Typical nanoparticles, silver, 8 gold 9,10 and aluminium, 11 together with nano metal oxides 12 and carbide 13 which show remarkable plasmonic effect have good performance in absorbing the solar energy.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient solar seawater desalination with environmentally friendly hierarchical porous carbons derived from halogen-containing polymers

et al. 2019

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Desalination of seawater using solar energy is a promising solution to the global freshwater shortage.Ultrahigh surface area (up to 1740 m 2 g À1 ) hierarchical porous carbons (HPC) have been prepared by the carbonization of precursors derived from the room temperature dehalogenation of low cost, widely available polyvinyl chloride (PVC) with simple, low cost, environmentally friendly processes. The broad hierarchical pores (from 2 nm to 20 mm) facilitate and ensure fast water and vapor transportation. Flexible photothermal steam generation devices were successfully fabricated with these hierarchical porous carbons on hydrophilic ultrathin (200 mm) paper. An evaporation rate record of 7.87 kg m À2 h À1 and high energy conversion of 95.8% have been obtained under the concentrated solar intensity of 5 kW m À2 . Our research leads to a new approach to converting halogenated plastics into environmentally friendly and useful porous carbon materials by simple, low-cost processes. It establishes and validates the concept of creating a sustainable and economic pathway to simultaneously recycle halogenated polymers, harvest solar energy and produce clean freshwater.

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A High‐Performance, Low‐Tortuosity Wood‐Carbon Monolith Reactor

Cited by 119 publications

References 51 publications

Using Patchy Particles to Prevent Local Rearrangements in Models of Non-equilibrium Colloidal Gels

Using Patchy Particles to Prevent Local Rearrangements in Models of Non-equilibrium Colloidal Gels

Graphene–Carbon Composites for Solar and Low‐Voltage Powered Efficient Interfacial Evaporation

Highly efficient solar seawater desalination with environmentally friendly hierarchical porous carbons derived from halogen-containing polymers

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