Metal-organic framework derived porous carbon of light trapping structures for efficient solar steam generation

Ma, Sainan; Qarony, Wayesh; Hossain, Mohammad Ismail; Yip, Cho Tung; Tsang, Yuen Hong

doi:10.1016/j.solmat.2019.02.035

Cited by 97 publications

(44 citation statements)

References 54 publications

(58 reference statements)

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“…It is mainly due to the poor hydrophilicity of CL, which leads to the slow transport speed of water in the material. The evaporation rate of MOF‐801@CL was measured to be 1.42 kg m −2 h −1 that was the highest among the three materials under 1 sun illumination, superior to almost all previous reports of MOF‐based evaporators 35‐38 (Table S2). Table S3 shows the performance comparison between solar evaporation devices prepared of carbonated loofah under 1 sun.…”

Section: Resultscontrasting

confidence: 66%

Carbonized loofah andMOF‐801 of synergistic effect for efficient solar steam generation

Guo

Zhao

et al. 2021

Int J Energy Res

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Summary Water transport capacity is one of the key factors for solar steam generation. Inspired by the transportation of water by vascular bundles in plants, the economical carbonized loofah (CL) with reticular structure and MOF‐801 with water absorption and rich pores were selected to form a solar evaporator. As vascular bundles, MOF‐801 provides abundant channels for rapid water transfer within the light absorbing layer. The excellent photothermal conversion performance of CL provides sufficient heat to convert the water quickly transported to the top of the light absorption layer into steam in time, just like plant transpiration. Thus, the evaporation efficiency of water was improved. The results show that MOF‐801@CL composite has excellent hydrophilicity. Under an optical density of the 1 kW m−2, the water evaporation rate of MOF‐801@CL was 1.42 kg m−2 h−1, which was about 1.2 times that of CL. The solar‐driven water evaporation efficiency reaches 88.9%. Furthermore, MOF‐801@CL has excellent stability in water evaporation and has great application potential in water purification. This design principle provides a potential way to improve the performance of solar steam generation and preparing solar water evaporation materials with high comprehensive benefit.

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Section: Resultscontrasting

confidence: 66%

Carbonized loofah andMOF‐801 of synergistic effect for efficient solar steam generation

Guo

Zhao

et al. 2021

Int J Energy Res

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“…[ 1,2 ] Although 71% of the Earth's surface is covered by water, only 2.5% of that is fresh water. [ 3 ] Sunlight is the most widespread energy source all over the world with the properties of renewable, wide availability, and inexhaustibility to the mankind. [ 4 ] In order to solve the global problem of water scarcity, various technologies, such as reverse osmosis, multi‐stage flash, and adsorption treatment, have been developed by scientists.…”

Section: Introductionmentioning

confidence: 99%

Hollow Carbon Fiber Decorated by Nano Structure Surface for High‐Efficiency Water Steam Generation

Suo

Yang

Zhang

et al. 2021

Advanced Sustainable Systems

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Utilization of carbon materials for harvesting solar energy is a green, feasible, sustainable, and promising way to manufacture freshwater from sewage and seawater. However, sunlight absorption efficiency, light to thermal conversion efficiency, and expensive cost are still limitations for large‐scale solar steam generation. Here, a solar steam evaporator which is fabricated by carbonized willow catkins films and activated by different metal chlorides under nitrogen at 800 °C is demonstrated. Under the light irradiation intensity of one sun (1000 W m−2), water evaporation rate of the prepared evaporator is up to ≈2.17 kg m−2 h−1, and the surface temperatures reach up to 50 and 91.7 °C under water‐saturated and dry situations, respectively, indicating good steam generation ability and heat localization performance of the fabricated evaporator. The SEM, BET, DSC, and ICP‐MS results show that such a high water evaporation rate of the prepared carbon materials is due to the typical tubular micro‐structure, which decreases water enthalpy of evaporation and the water evaporation in the form of molecular clusters. This method of carbonized and activated willow catkins films provides a sustainable way for efficiently harvesting solar energy to produce fresh water from seawater and sewage.

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“…This was because the light adsorption ability of a porous carbon material was not only closely related with its π electrons, but also its pores. As shown in the inset, the incident light trapped in the pores of the carbon monolith can bounce back and forth between the walls, resulting in the light propagation and multiple light matter interactions and effective light harvest [4,8,54]. Thus, a higher BET surface area was no doubt conducive to improving the light adsorption.…”

Section: Characterization Of Porous Carbon Monolithmentioning

confidence: 99%

“…Although CNT and graphene are two representative kinds of carbonaceous materials for SSG, both of them are still more expensive than gold. Moreover, the fabrication of graphene or CNT-based photothermal materials is complicated, making them unrealistic for widespread use [7,8]. Therefore, it is highly desirable to develop inexpensive, easy-to-manufacture, mechanically robust carbonaceous materials for SSG [9].…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of magnetic porous carbon monolith from waste corrugated cardboard box for solar steam generation and adsorption

Cao

2020

Biomass Conv. Bioref.

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Porous carbon monoliths (PCMs) were prepared from waste corrugated cardboard box (WCCB) via slurrying in FeCl 3 solution followed by molding and thermal treatment. The thermal process was analyzed by a thermogravimetric analyzer coupled with a Fourier transform infrared spectrometer. The evolution of physicochemical characteristics of PCMs was studied. The photothermal conversion and solar steam generation performances of the optimal sample (PCM Fe/600 ) were evaluated. The adsorption properties of PCM Fe/600 for methylene blue (MB) were investigated. Results showed that Fe 3+ promoted the breaking of cellulose chains in WCCB, leading to the occurrence of pyrolysis of WCCB at lower temperatures and the reduction of activation energy by 76.63 kJ mol −1 . Char yield raised because volatile radicals were captured by FeCl 3 -derived amorphous Fe(III) species, then involved in char formation. Amorphous Fe(III) continuously converted into Fe 3 O 4 crystallites with carbonization temperature increasing from 400 to 700°C, then α-Fe was formed at 800°C via the carbothermal reduction of Fe 3 O 4 . FeCl 3 was favorable to the formation of a developed microporous structure. Surface area significantly increased with carbonization temperature increasing from 400 to 600°C due to the removal of volatiles. The etching of carbon by Fe 3 O 4 above 700°C also led to the increase of surface area. PCM Fe/600 exhibited higher optical absorption than other samples due to its high graphite degree and porosity. It also had excellent photothermal performance; thus, solar steam yield was 1.46 times that of the pure water with the assistance of PCM Fe/600 . PCM Fe/600 in floating state was effective in adsorption of MB from water. Besides, the adsorption behavior fitted Langmuir model with a monolayer adsorption capacity reached up to 70.9 mg g −1 .

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Metal-organic framework derived porous carbon of light trapping structures for efficient solar steam generation

Cited by 97 publications

References 54 publications

Carbonized loofah andMOF‐801 of synergistic effect for efficient solar steam generation

Carbonized loofah andMOF‐801 of synergistic effect for efficient solar steam generation

Hollow Carbon Fiber Decorated by Nano Structure Surface for High‐Efficiency Water Steam Generation

Facile preparation of magnetic porous carbon monolith from waste corrugated cardboard box for solar steam generation and adsorption

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