Sponge-templating synthesis of sandwich-like reduced graphene oxide nanoplates with confined gold nanoparticles and their enhanced stability for solar evaporation

Zhu, Heguo; Jin, G.; Zhao, Hongbin; Shi, Lu‐An; Huang, Jin; Xu, Liang; Yu, Shu‐Hong

doi:10.1007/s40843-020-1446-5

Cited by 20 publications

(8 citation statements)

References 43 publications

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“…As a pivotal component of ISSG system, solar absorber acts as photo-thermal converter to provide thermal energy for water evaporation [10,11]. Until now, various types of solar absorbers have been developed, including metal nanoparticles [12][13][14][15][16], semi-conductor material [17], conjugated polymer [18], carbon material [19][20][21][22][23], and hydrogel [24,25]. Despite the significant progress achieved, these absorbers usually show drawbacks of high cost and complex synthesis process.…”

Section: Introductionmentioning

confidence: 99%

High-performance salt-resistant solar interfacial evaporation by flexible robust porous carbon/pulp fiber membrane

et al. 2021

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Solar evaporation has emerged as an attractive technology to produce freshwater by utilizing renewable solar energy. However, it remains a huge challenge to develop efficient solar steam generators with good flexibility, low cost and remarkable salt resistance. Herein, we prepare flexible, robust solar membranes by filtration of porous carbon and commercial paper pulp fiber. The porous carbon with well-defined structures is prepared through controlled carbonization of biomass/waste plastics by eutectic salts. We prove the synergistic effect of porous carbon and paper pulp fiber in boosting solar evaporation performance. Firstly, the porous carbon displays a high light absorption, while the paper pulp fiber with good hydrophilicity effectively promotes the transport of water. Secondly, the combination between porous carbon and paper pulp fiber reduces the water vaporization enthalpy by 20%, which is important to significantly improve the evaporation performance. As a proof of concept, the porous carbon/paper pulp fiber membrane possesses a high evaporation rate of 1.8 kg m −2 h −1 under 1 kW m −2 irradiation. Thirdly, the good flexibility and mechanical property of paper pulp fiber enable the solar membrane to work well under extreme conditions (e.g., after 20 cycles of folding/stretching/ recovery). Lastly, due to the super-hydrophilicity and superwetting, the hybrid membrane exhibits the exceptional salt resistance and long-term stability in continuous seawater desalination, e.g., for 50 h. Importantly, a large-scale solar desalination device for outdoor experiments is developed to produce freshwater. Consequently, this work provides a new insight into developing advanced flexible solar evaporators with superb performance in seawater desalination.

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Section: Introductionmentioning

confidence: 99%

High-performance salt-resistant solar interfacial evaporation by flexible robust porous carbon/pulp fiber membrane

et al. 2021

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“…Additionally, inherent bioactive molecules, which are easily used as capping and stabilizing agents are major factors that participate in the steady rise of this method adoption. Several studies reported the use of living materials such as plants, bacteria, algae, fungi, and sponge extract for the green synthesis of nanoparticles [19][20][21][22]. In light of the above mentioned useful properties and the ever increasing probability of exposure to monometallic and bimetallic nanoparticles, it is vital to develop an environmental friendly, sustainable synthetic, and cost effective approach for the fabrication of metallic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial and Immunomodulatory Potentials of Biosynthesized Ag, Au, Ag-Au Bimetallic Alloy Nanoparticles Using the Asparagus racemosus Root Extract

et al. 2020

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Two noble metals, such as silver and gold alloy nanoparticles, were successfully synthesized by the microwave assisted method in the presence of the Asparagus racemosus root extract and were used as an antibacterial and immunomodulatory agent. The nanostuctures of the synthesized nanoparticles were confirmed by various spectroscopic and microscopic techniques. The UV-vis spectrum exhibits a distinct absorption peak at 483 nm for the bimetallic alloy nanoparticles. The microscopic analysis revealed the spherical shaped morphology of the biosynthesized nanoparticles with a particle size of 10–50 nm. The antibacterial potential of the green synthesized single metal (AgNPs and AuNPs) and bimetallic alloy nanoparticles was tested against five bacterial strains. The bimetallic alloy nanoparticles displayed the highest zone of inhibition against P. aeurgnosia and S.aureus strains when compared to single metal nanoparticles and plant extract. In addition, the inmmunomodulatory potential of the root extract of A. racemosus, AgNPs, AuNPs, and Ag-Au alloy NPs is achieved by measuring the cytokine levels in macrophages (IL-1β, IL-6, and TNF-α) and NK cells (IFN-γ) of NK92 and THP1 cells using the solid phase sandwich ELISA technique. The results showed that the root extract of A. racemosus, AgNPs, and AuNPs can reduce the pro-inflammatory cytokine levels in the macrophages cells, while Ag-Au alloy NPs can reduce cytokine responses in NK92 cells. Overall, this study shows that the microwave assisted biogenic synthesized bimetallic nanoalloy nanoparticles could be further explored for the development of antibacterial and anti-inflammatory therapies.

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“…This mixture was then further coated with rGO producing rGO/Au/rGO nanoplates and added on a hydrophilic substrate base as water transport. The wrinkled nanoplates with a broad light absorption of 400–1200 nm resulted in a maximum 75.5 °C surface temperature and a water evaporation rate of ∼1.15 kg m −2 h −1 with 63.35 % efficiency under 1 sun [10b] …”

Section: Solar Absorber Selectionmentioning

confidence: 99%

Water Harvesting Strategies through Solar Steam Generator Systems

et al. 2022

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Solar steam generator (SSG) systems have attracted increasing attention, owing to its simple manufacturing, material abundance, cost‐effectiveness, and environmentally friendly freshwater production. This system relies on photothermic materials and water absorbing substrates for a clean continuous distillation process. To optimize this process, there are factors that are needed to be considered such as selection of solar absorber and water absorbent materials, followed by micro/macro‐structural system design for efficient water evaporation, floating, and filtration capability. In this contribution, we highlight the general interfacial SSG concept, review and compare recent progresses of different SSG systems, as well as discuss important factors on performance optimization. Furthermore, unaddressed challenges such as SSG's cost to performance ratio, filtration of untreatable micropollutants/microorganisms, and the need of standardization testing will be discussed to further advance future SSG studies.

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Sponge-templating synthesis of sandwich-like reduced graphene oxide nanoplates with confined gold nanoparticles and their enhanced stability for solar evaporation

Cited by 20 publications

References 43 publications

High-performance salt-resistant solar interfacial evaporation by flexible robust porous carbon/pulp fiber membrane

High-performance salt-resistant solar interfacial evaporation by flexible robust porous carbon/pulp fiber membrane

Antibacterial and Immunomodulatory Potentials of Biosynthesized Ag, Au, Ag-Au Bimetallic Alloy Nanoparticles Using the Asparagus racemosus Root Extract

Water Harvesting Strategies through Solar Steam Generator Systems

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