A 3D Photothermal Structure toward Improved Energy Efficiency in Solar Steam Generation

Shi, Yusuf; Li, Renyuan; Jin, Yong; Zhuo, Sifei; Shi, Le; Chang, Junseok; Hong, Seok Cheol; Ng, Kim Choon; Wang, Peng

doi:10.1016/j.joule.2018.03.013

Cited by 599 publications

(474 citation statements)

References 46 publications

Supporting

Mentioning

458

Contrasting

Order By: Relevance

“…That is because in the dark, the water gains heat from surroundings to realize spontaneous evaporation, while under solar illumination, the thermal energy flows inversely from the interface to the surroundings. So the evaporation rate obtained is used directly to evaluate the efficiency . At the deposition time of 5 min, the evaporation rate decreased slightly.…”

Section: Figurementioning

confidence: 99%

Bioinspired Soot‐Deposited Janus Fabrics for Sustainable Solar Steam Generation with Salt‐Rejection

et al. 2019

View full text Add to dashboard Cite

Inspired by lotus leaves, self‐floating Janus cotton fabric is successfully fabricated for solar steam generation with salt‐rejecting property. The layer‐selective soot‐deposited fabrics not only act as a solar absorber but also provide the required superhydrophobicity for floating on the water. With a polyester protector, the prepared Janus evaporator exhibits a sustainable evaporation rate of 1.375 kW m −2 h −1 and an efficiency of 86.3% under 1 sun (1 kW m −2 ) and also performs well under low intensity and inclined radiation. Furthermore, no special apparatus and/or tedious processes are needed for preparing this device. With a cost of less than $1 per m 2 , this flexible Janus absorber is a promising tool for portable solar vapor generator.

show abstract

Section: Figurementioning

confidence: 99%

Bioinspired Soot‐Deposited Janus Fabrics for Sustainable Solar Steam Generation with Salt‐Rejection

et al. 2019

View full text Add to dashboard Cite

show abstract

“…One of the effective strategies for further improving the vapor‐generation efficiency is to decrease the surface temperature of the absorber by increasing the surface area within a given projection area . Some unprecedented vapor‐generation rates have been reported in various 3D generators, which are all beyond the input solar energy limit …”

mentioning

confidence: 99%

Carbonized Bamboos as Excellent 3D Solar Vapor‐Generation Devices

Bian

Tang

et al. 2018

Adv Materials Technologies

125

View full text Add to dashboard Cite

of the 2D structures has approached its limit (< 90%) due to which the energy loss via reflection (2-5%) and thermal radiation heat loss (8-12%) occurs in all the 2D structures.One of the effective strategies for further improving the vapor-generation efficiency is to decrease the surface temperature of the absorber by increasing the surface area within a given projection area. [22] Some unprecedented vapor-generation rates have been reported in various 3D generators, which are all beyond the input solar energy limit. [23][24][25] Here, we have found that bamboos, as a natural hierarchical cellular material, can be excellent 3D solar vapor-generation devices due to their unique structural features. By a simple carbonization progress, the bamboos maintain remarkable mechanical property. Meanwhile, the carbonized bamboo-based evaporator possesses the following advantages: 1) natural hydrophilicity; 2) numerous aligned microchannels acting as highways for rapid water transport; 3) high light absorptance in a broad spectral range; 4) reduced thermal radiation heat loss; 5) lower average temperature than environment; 6) reduced vaporization enthalpy of water confined in the bamboo mesh; 7) remarkable mechanical properties; 8) ability of salt self-cleaning; 9) good scalability and low cost. As a result, a floating carbonized bamboo sample can evaporate water with an extremely high vapor-generation rate of 3.13 kg m −2 h −1 under 1 sun illumination. It also shows superior reusability and stability for solar vapor generation, without any performance degradation after cycling 360 h. The carbonized bamboo shows favorable overall performance compared with other reported solar vapor generators and has attractive applications in desalination as well asindustrial and domestic wastewater abatement. All of these features are elucidated below in detail.Bamboo is the fastest-growing and highest-yielding hierarchical cellular material on the Earth. A typical bamboo reaches maturity within months and ultimate mechanical properties within few years, making it one of the most renewable resources. [26] Figure 1a-c shows the illustration of the design concept for a bamboo-based solar vapor-generation device. Bamboo tubes with desired height were cut from the natural bamboo and were carbonized to make it dark. The carbonized Given the global challenges of water scarcity, solar-driven vapor generation has become a renewed topic as an energy-efficient way for clean water production. Here, it is revealed that bamboo, as a natural hierarchical cellular material, can be an excellent 3D solar vapor-generation device by a simple carbonization progress. A floating carbonized bamboo sample evaporates water with an extremely high vapor-generation rate of 3.13 kg m −2 h −1 under 1 sun illumination. The high evaporation rate is achieved by the unique natural structure of bamboos. The inner wall of bamboo recovers the diffuse light energy and the thermal radiation heat loss from the 3D bamboo bottom, and the outer wall captures energy from the warmer...

show abstract

“…The utilization of photothermal materials is indispensable to improve the efficiency of solar thermal energy. The light capture and photothermal conversion properties of photothermal materials play key roles in solar photothermal conversion 18 …”

Section: Introductionmentioning

confidence: 99%

Efficient photothermal conversion of Fe₂O₃–RGO guided from ultrafast quenching effect of photoexcited state

Zhang

Gurzadyan

et al. 2020

AIChE Journal

View full text Add to dashboard Cite

In solar thermal utilization, effective photo capture and photothermal conversion are crucial. Improving the nonradiative transition rate of photoexcited electrons is important to enhance the photothermal conversion efficiency and develop efficient solar thermal utilization. Herein, we designed a new kind of light absorption-enhanced and efficient photothermal conversion material, namely, Fe 2 O 3 -functionalized reduced graphene oxide (Fe 2 O 3 -RGO). On the basis of the selective absorption (350-560 nm) of Fe 2 O 3 and the synergistic effect of RGO on the quenching energy transfer of the excited state of Fe 2 O 3 and ultrafast nonradiative thermal decay of RGO, the optical absorption capacity, and photothermal conversion efficiency of the composites were effectively improved. Fe 2 O 3 -RGO can be successfully applied to photothermal conversion phase change materials and seawater solar desalination, showing excellent photothermal conversion ability and application prospect. K E Y W O R D S enhanced light absorption, Fe 2 O 3 -RGO, photothermal conversion, quenching effect, seawater solar desalination

show abstract

A 3D Photothermal Structure toward Improved Energy Efficiency in Solar Steam Generation

Cited by 599 publications

References 46 publications

Bioinspired Soot‐Deposited Janus Fabrics for Sustainable Solar Steam Generation with Salt‐Rejection

Bioinspired Soot‐Deposited Janus Fabrics for Sustainable Solar Steam Generation with Salt‐Rejection

Carbonized Bamboos as Excellent 3D Solar Vapor‐Generation Devices

Efficient photothermal conversion of Fe₂O₃–RGO guided from ultrafast quenching effect of photoexcited state

Contact Info

Product

Resources

About

A 3D Photothermal Structure toward Improved Energy Efficiency in Solar Steam Generation

Cited by 599 publications

References 46 publications

Bioinspired Soot‐Deposited Janus Fabrics for Sustainable Solar Steam Generation with Salt‐Rejection

Bioinspired Soot‐Deposited Janus Fabrics for Sustainable Solar Steam Generation with Salt‐Rejection

Carbonized Bamboos as Excellent 3D Solar Vapor‐Generation Devices

Efficient photothermal conversion of Fe2O3–RGO guided from ultrafast quenching effect of photoexcited state

Contact Info

Product

Resources

About

Efficient photothermal conversion of Fe₂O₃–RGO guided from ultrafast quenching effect of photoexcited state