Hybrid solar-driven interfacial evaporation systems: Beyond water production towards high solar energy utilization

Ding, Tianpeng; Zhou, Yi; Ong, Wei Li; Ho, Ghim Wei

doi:10.1016/j.mattod.2020.10.022

Cited by 336 publications

(188 citation statements)

References 129 publications

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“…Voltages of 2-10 V were then applied to the membrane, and the surface temperature of the membrane increased from 23 to 30.7 °C, as shown in the insets of Figure 8b, and the water evaporation rate increased from 0.14 to 0.78 kg m −2 h −1 . As β-PVDF membranes exhibit both piezoelectric and pyroelectric effects, [45,46] the potential pyroelectric performance of the PVDF 1 :G 1.5 membrane under solar heating was studied. The influence of temperature changes on the pyroelectric performance of the membrane is shown in Figure 8c-d.…”

Section: Pyroelectric Performance Of the Pvdf/graphene Solar Evaporatmentioning

confidence: 99%

Tailoring of a Piezo‐Photo‐Thermal Solar Evaporator for Simultaneous Steam and Power Generation

Huang

Chiao

et al. 2021

Adv Funct Materials

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Water and electricity shortages constitute a global energy crisis that cannot be ignored. The sun is an unlimited source of energy, and oceans provide abundant water and renewable energy resources. In this study, poly-(vinylidene fluoride) (PVDF)/graphene solar evaporator membranes are fabricated for simultaneous freshwater production and power generation. Graphene addition transformed the PVDF crystal from the α-phase to the piezoelectric self-assembly β-phase. The resulting membrane is used to convert the mechanical energy of waves to electrical energy. The membrane has an output voltage of 2.6 V (±1.3 V) and an energy density of 2.11 Wm −2 for 1 Hz simulated waves, which are higher than values reported in the literature. The stacked graphene and polymer formed a wood-lumens-like mesoporous structure with a photothermal effect. Under one sun illumination, the water production rate is 1.2 kg m −2 h −1 , and the solar-thermal energy conversion efficiency is 84%. Finally, a prototype is built to prove a single evaporator's feasibility that can simultaneously obtain freshwater and generate electricity. Thus, this membrane serves as an ocean wave power generation device that can provide all-weather energy generation, convert stored electrical energy into thermal energy at night and on cloudy days, and continuously provide safe drinking water.

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Section: Pyroelectric Performance Of the Pvdf/graphene Solar Evaporatmentioning

confidence: 99%

Tailoring of a Piezo‐Photo‐Thermal Solar Evaporator for Simultaneous Steam and Power Generation

Huang

Chiao

et al. 2021

Adv Funct Materials

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“…The development of renewable energy with high efficiency is important for general life [ 3 , 4 ]. Hence, solar heat energy is considered as a wonderful type of clean energy, due to easy collection and low costs [ 5 , 6 ]. It is necessary to collect and use external clean energy.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Thermoelectric Energy Harvesting with Graphene Aerogel-Supported Form-Stable Phase Change Materials

Song

2021

Nanomaterials

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Graphene aerogel-supported phase change material (PCM) composites sustain the initial solid state without any leakage problem when they are melted. The high portion of pure PCM in the composite can absorb or release a relatively large amount of heat during heating and cooling. In this study, these form-stable PCM composites were used to construct a thermoelectric power generator for collecting electrical energy under the external temperature change. The Seebeck effect and the temperature difference between the two sides of the thermal device were applied for thermoelectric energy harvesting. Two different PCM composites were used to collect the thermoelectric energy harvesting due to the different phase transition field in the heating and cooling processes. The graphene nano-platelet (GNP) filler was embedded to increase the thermal conductivities of PCM composites. Maximum output current was investigated by utilizing these two PCM composites with different GNP filler ratios. The thermoelectric energy harvesting efficiencies during heating and cooling were 62.26% and 39.96%, respectively. In addition, a finite element method (FEM) numerical analysis was conducted to model the output profiles.

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“…[1][2][3][4] During solar steam generation, water is transported through capillary paths to the surfaces of photothermal materials (PTM; i.e., the evaporation surfaces), where the heat harnessed from sunlight conversion is localized and concentrated to drive water evaporation at very high evaporation rates and energy efficiencies. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] The generated vapor can then be collected as clean water. Such a green and highly efficient water evaporation technology has been intensively applied in many fields including seawater desalination, wastewater purification, electricity generation and sterilization.…”

Section: Introductionmentioning

confidence: 99%

Interfacial solar evaporation driven lead removal from a contaminated soil

Pan

et al. 2021

EcoMat

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Interfacial solar steam generation is a green and sustainable technology which has been intensively studied in the fields of seawater desalination and wastewater purification for clean water production. Here, this technology is further developed for soil remediation. A new photothermal evaporator is designed to accelerate the extraction of lead (Pb) from soil solution, thereby successfully rapidly remediating a Pb contaminated soil. Within 2 weeks, this solar-driven evaporative remediation (SDER) simultaneously decreases the bioavailable Pb fraction by 38.4% (from 359 to 221 mg kg À1 ) with no excessive nutrient loss nor secondary pollution. Post remediation plant assay indicates that the treated soil is significantly less phytotoxic, with shoot/root Pb contents decreasing by 50%. Since SDER involves no external energy input; other than solar irradiation; ongoing operating costs are low leading to significant potential for sustainable practical applications. Overall, this study demonstrates for the first time that interfacial solar evaporation can be successfully applied to soil remediation.

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Hybrid solar-driven interfacial evaporation systems: Beyond water production towards high solar energy utilization

Cited by 336 publications

References 129 publications

Tailoring of a Piezo‐Photo‐Thermal Solar Evaporator for Simultaneous Steam and Power Generation

Tailoring of a Piezo‐Photo‐Thermal Solar Evaporator for Simultaneous Steam and Power Generation

Analysis of Thermoelectric Energy Harvesting with Graphene Aerogel-Supported Form-Stable Phase Change Materials

Interfacial solar evaporation driven lead removal from a contaminated soil

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