Tailoring polypyrrole-based Janus aerogel for efficient and stable solar steam generation

Wen, Bingyan; Zhang, Xiaoyi; Yan, Yajing; Huang, Yuan; Lin, Si; Zhu, Yongmei; Wang, Zhipeng; Zhou, Binghua; Yang, Shenghong; Liu, Jian

doi:10.1016/j.desal.2021.115228

Cited by 73 publications

(44 citation statements)

References 60 publications

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“…So far, many light-to-heat conversion materials have been developed, such as plasma materials, − carbon-based materials, − semiconductor materials, − and polymer materials − for solar steam generation. Although significant achievements have been made in the preparation of photothermal materials in the past few years, the problem still exists; in some cases, high costs (due to use of metals like gold and silver), harsh conditions (such as high-temperature carbonization, − freeze-drying, or plasma treatment), or the use of photothermal materials and special equipment materials hinder industry applications. Therefore, it has become a key and necessary challenge to develop photothermal materials with broad-spectrum light absorption to enhance solar energy absorption through the concept of commercial preparation for large-scale use.…”

Section: Introductionmentioning

confidence: 99%

SiO₂/MXene/Poly(tetrafluoroethylene)-Based Janus Membranes as Solar Absorbers for Solar Steam Generation

et al. 2021

ACS Appl. Nano Mater.

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Water treatment through interface photothermal conversion using solar energy is a sustainable strategy for freshwater supply. Because the preparation method of highly efficient photothermal conversion materials with commercial value is the only way for the industrialization of solar steam generation, the preparation method and the rational design of photothermal materials are particularly important. In this work, the highefficiency photothermal conversion material MXene nanosheets and low thermal conductivity SiO 2 were coated on a hydrophilic poly(tetrafluoroethylene) (HPTFE) membrane by a commercial continuous spraying system to produce a SiO 2 /MXene/HPTFE Janus membrane. They possess excellent mechanical properties, high stability, and 93.0% light absorption. The prepared evaporator can be used for water treatment with a photothermal evaporation rate of 1.53 kg m −2 h −1 , achieving a uniform and effective 85.6% solar thermal conversion efficiency, which is superior to most reported work. The removal rate of wastewater and organic pollutants can reach 99.9%. At the same time, the two-dimensional Janus membrane has excellent salt resistance and self-cleaning ability, making it easy to store and transport. It is also used to build sensor systems. The sensor has an excellent light response and can accurately measure solar radiation density and temperature in a short time. Therefore, the use of commercial spraying systems provides a cost-effective and energy-saving strategy for photothermal evaporators and sensors to reduce the use of photothermal materials, achieve higher photothermal evaporation rates, and expand the application direction of photothermal materials.

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Section: Introductionmentioning

confidence: 99%

SiO₂/MXene/Poly(tetrafluoroethylene)-Based Janus Membranes as Solar Absorbers for Solar Steam Generation

et al. 2021

ACS Appl. Nano Mater.

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“…For the PDA‐based PTMs, such as PDA‐based bacterial nano‐cellulose (PDA‐BNC), 30 PDA‐based cellulose aerogel (PDA‐CA), 31 Ag‐PDA@Wood, 32 PDA‐CB@PPNWF, 33 PDA‐RGO‐PTFE, 34 Ag‐PDA@Wooden flower, 35 and Ni 1 Co 3 ‐PDA@Sponge 36 . For the PPy‐based PTMs, such as PPy‐Wood, 37 PPy‐Sponge, 38 PPy‐based melamine foam (PPy‐MF), 39 PPy‐based sugarcane (PPy‐SC), 40 PPy‐based polyvinyl alcohol (PPy‐PVA), 41 PPy‐paper, 42 PPy‐based natural latex, 43 and PPy‐based sunflower discs (PPy‐SFD) 44 . The evaporation rates of both DK‐based solar evaporators are above‐average to the corresponding published polymer‐based PTMs.…”

Section: Resultsmentioning

confidence: 99%

Polymer‐decorated daikon‐based solar evaporators for efficient interfacial water evaporation

Zhang

Yang

et al. 2022

Intl J of Energy Research

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Interface solar evaporator has been recognized as a potential device for extracting freshwater from non-potable water. Biomass like daikon is an excellent candidate for fabricating solar evaporators because of its good hydrophilia and porous structure, which facilitates water transfer and vapor release.Besides, polymers like polydopamine and polypyrrole (abbreviated as PDA and PPy, respectively) possessing wide spectrum absorption are fascinating candidates for efficient solar evaporators. Herein, PDA-decorated daikon and PPydecorated daikon (abbreviated as PDA-DK and PPy-DK, respectively) solar evaporators have been developed for vapor production. Due to polyethylene foam can effectively concentrate the heat on the photothermal materials, under 1-solar intensity, the water vaporization rates of PDA-DK and PPy-DK are enhanced to 1.50 and 1.60 kg m À2 h À1 , and the relative solar thermal efficiencies are improved by about 40%, from 49.51% and 58.65% to 89.01% and 98.97%, respectively. Thanks to the super hydrophilicity and high water storage capacity, the PPy-DK has the self-cleaning ability and can effectively desalinate seawater with a desalination rate of around 1.6 kg m À2 h À1 . Moreover, both solar evaporators exhibit considerable stability in evaporation rate, with no significant changes within 15 cycles. Outdoor experiments demonstrate that these two solar evaporators are capable of desalinating saltwater and cleaning dye wastewater.

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“…This study thus proved its higher energy conversion efficiency compared with the evaporator with evenly distributed solar absorbers. In addition, there are some other methods to confine the solar absorbers on the surface layer, such as using the difference in surface tension between ethanol and water, 134 concentrating them on one end of the hydrogel under gravity, 82 carbonizing the upper side of the hydrogel, 90,162 and so on.…”

Section: Solar–thermal Conversion Enhancementmentioning

confidence: 99%

“…A practical method is to reduce the surface wettability to improve the water transport competence. Examples include using hydrophobic polydimethylsiloxane (PDMS) as the top layer, 123 adding hydrophobic Si aerogels mainly in the upper part, 34,104,164 selectively decorating the upper surface with PFOTS 162 and reducing hydrophilic GO into hydrophobic rGO at the top side via laser. 165 Furthermore, Guo et al 36 have reported a patchy surface with hydrophobic and hydrophilic parts for higher water transport speed and excellent SVG performance (4 kg m −2 h −1 with 93% energy conversion efficiency Fig.…”

Section: Enhancing Water Transport/activation Capacitymentioning

confidence: 99%

Recent developments of hydrogel based solar water purification technology

et al. 2022

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Tailoring polypyrrole-based Janus aerogel for efficient and stable solar steam generation

Cited by 73 publications

References 60 publications

SiO₂/MXene/Poly(tetrafluoroethylene)-Based Janus Membranes as Solar Absorbers for Solar Steam Generation

SiO₂/MXene/Poly(tetrafluoroethylene)-Based Janus Membranes as Solar Absorbers for Solar Steam Generation

Polymer‐decorated daikon‐based solar evaporators for efficient interfacial water evaporation

Recent developments of hydrogel based solar water purification technology

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Tailoring polypyrrole-based Janus aerogel for efficient and stable solar steam generation

Cited by 73 publications

References 60 publications

SiO2/MXene/Poly(tetrafluoroethylene)-Based Janus Membranes as Solar Absorbers for Solar Steam Generation

SiO2/MXene/Poly(tetrafluoroethylene)-Based Janus Membranes as Solar Absorbers for Solar Steam Generation

Polymer‐decorated daikon‐based solar evaporators for efficient interfacial water evaporation

Recent developments of hydrogel based solar water purification technology

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Product

Resources

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SiO₂/MXene/Poly(tetrafluoroethylene)-Based Janus Membranes as Solar Absorbers for Solar Steam Generation

SiO₂/MXene/Poly(tetrafluoroethylene)-Based Janus Membranes as Solar Absorbers for Solar Steam Generation