Solar water evaporation by black photothermal sheets

Li, Guohua; Xu, Jinliang; Wang, Kaiying

doi:10.1016/j.nanoen.2017.09.005

Cited by 467 publications

(239 citation statements)

References 96 publications

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“…In addition to excellent ROS generation, the additional advantage of efficient solar light‐to‐heat conversion of the RP/ZnO heterojunction is nonnegligible. Figure B exhibits the remarkable color difference of Ti, Ti‐RP, Ti‐ZnO, and Ti‐RP/ZnO, where Ti‐RP and Ti‐RP/ZnO are the blackest samples, illustrating that Ti‐RP and Ti‐RP/ZnO may possess strong NIR light absorption under solar irradiance, which will generate heat energy . Theoretically, many photons from solar emission have an energy larger than the bandgap of fibrous RP, contributing to the generation of above‐bandgap electron–hole pairs in fibrous RP under solar irradiation .…”

Section: Resultsmentioning

confidence: 99%

“…The locally increased temperature (more than 50 °C) generated by the solar light‐activated photothermal reaction can provide lethality through hyperthermia and irreversible bacterial destruction, eventually killing bacteria . Additionally, the direct thermalization in fibrous RP can consume the photon energy, and the rest of the band edge energy located in the infrared region may also result in the generation of heat and be thermally absorbed by the vibration of the crystal lattice . The electronic states around the Fermi energy are predominantly composed of the P 2p states of fibrous P and the O 2p states of RP/ZnO, respectively (Figure C1,F).…”

Section: Resultsmentioning

confidence: 99%

“…This phenomenon may result because the hot electrons and holes of RP/ZnO are more efficiently generated and separated at the heterojunction interface (Figure E). Additionally, the relaxation dynamics of the above‐bandgap charges is quite complex, which may be ascribed to an acoustic‐phonon scattering mechanism …”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Light‐Activated Rapid Disinfection by Accelerated Charge Transfer in Red Phosphorus/ZnO Heterointerface

Liu²,

Liang

et al. 2019

Small Methods

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A red phosphorus (RP)/ZnO heterojunction thin film is developed to harvest solar or light emitting diode (LED) light for rapid, effective, ecofriendly, lower‐cost, and safe disinfection, which is convenient for universal and large‐scale deposition. The most stable geometrical structure of the RP/ZnO heterojunction, i.e., an RP (001) plane and a ZnO (002) plane, exhibits charge redistribution largely at the interface region. Therefore, the effective interfacial charge transfer and the improved separation efficiency of photogenerated electron–hole pairs can strongly boost reactive oxygen species (ROS)‐generation reactions to enhance photocatalytic bacterial inactivation. The excellent light‐activated point‐of use disinfection can be achieved even through LED light of phone. Additionally, the RP/ZnO heterojunction also possesses excellent solar light‐to‐heat conversion efficiency, leading to further lethality to bacteria through hyperthermia. Antibacterial efficacy of 99.96 ± 0.03% against Staphylococcus aureus at 5 min and 99.97 ± 0.02% against Escherichia coli at 4 min can be attributed to the synergetic antibacterial activity of solar photocatalysis and photothermal effect (more than 50 °C in 2 min). This platform provides a surface strategy for designing synergetic photocatalytic and photothermal materials to fully harvest solar energy for not only water disinfection but also antibacterial surfaces in medical facilities, touch screen devices, or seawater desalination.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Light‐Activated Rapid Disinfection by Accelerated Charge Transfer in Red Phosphorus/ZnO Heterointerface

Liu²,

Liang

et al. 2019

Small Methods

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“…This work provides a new approach to solar-assisted steam generation for many potential applications. In order to further boost the solar thermal conversion efficiency, it will be ideal to have one material possessing all the required thermal, optical, and wetting properties to avoid the interference from the composite interfaces [97]. To cope with this challenge, graphene-related materials was considered as one of the promising candidates owing to their low molar specific heat, high Debye temperature, broadband light absorption, and tunable thermal conductivity by chemical doping [98].…”

Section: Carbon/graphene Based Floating Solar Receivermentioning

confidence: 99%

Novel Receiver-Enhanced Solar Vapor Generation: Review and Perspectives

Raza

Alzaim

et al. 2018

Energies

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Efficient solar vapor/steam generation is important for various applications ranging from power generation, cooling, desalination systems to compact and portable devices like drinking water purification and sterilization units. However, conventional solar steam generation techniques usually rely on costly and cumbersome optical concentration systems and have relatively low efficiency due to bulk heating of the entire liquid volume. Recently, by incorporating novel light harvesting receivers, a new class of solar steam generation systems has emerged with high vapor generation efficiency. They are categorized in two research streams: volumetric and floating solar receivers. In this paper, we review the basic principles of these solar receivers, the mechanism involving from light absorption to the vapor generation, and the associated challenges. We also highlight the two routes to produce high temperature steam using optical and thermal concentration. Finally, we propose a scalable approach to efficiently harvest solar energy using a semi-spectrally selective absorber with near-perfect visible light absorption and low thermal emittance. Our proposed approach represents a new development in thermally concentrated solar distillation systems, which is also cost-effective and easy to fabricate for rapid industrial deployment.

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“…The multiple classifications of basic principle for the entire ISSG system mainly contain two important examples. One is Wang et al summarized three important factors, that is, light absorbing, thermal insulating, and capillary . The other is Choi et al picked up four important ones, that is, broad‐band sunlight absorbability, thermal management, water transportation, and water evaporation .…”

Section: Introductionmentioning

confidence: 99%

Fast‐Growing Field of Interfacial Solar Steam Generation: Evolutional Materials, Engineered Architectures, and Synergistic Applications

Wang

et al. 2019

Solar RRL

147

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The lack of fresh water resources is attracting concern worldwide. Recently, to address this global issue, researchers proposed the heat localization concept for interfacial solar seawater desalination in 2014. Since then, interfacial solar steam generation (ISSG) devices have attracted much attention, due to their potential for achieving highly enhanced optical‐thermal conversion through a single interface as compared with traditional solar seawater desalination. To date, the promising prospect of ISSG systems in seawater desalination has stimulated the rapid development of solar desalination technology based on heat localization. To comprehensively recognize ISSG devices and acquire more insights into their design associated with biological relevance, efficiency improvement, and applications, this review summarizes the progresses and prospects of ISSG devices in relation to the evolution of advanced materials, the engineering architecture, the collaborative application, and the current challenges.

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Solar water evaporation by black photothermal sheets

Cited by 467 publications

References 96 publications

Light‐Activated Rapid Disinfection by Accelerated Charge Transfer in Red Phosphorus/ZnO Heterointerface

Light‐Activated Rapid Disinfection by Accelerated Charge Transfer in Red Phosphorus/ZnO Heterointerface

Novel Receiver-Enhanced Solar Vapor Generation: Review and Perspectives

Fast‐Growing Field of Interfacial Solar Steam Generation: Evolutional Materials, Engineered Architectures, and Synergistic Applications

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