A scalable, cost-effective and salt-rejecting MoS2/SA@melamine foam for continuous solar steam generation

Xiao, Juanxiu; Guo, Yang; Luo, Wenqi; Wang, Dong; Zhong, Shengkui; Yue, Yaru; Han, Caina; Lv, Rongxin; Feng, Jianbo; Wang, Jieqiong; Wei, Huang; Tian, Xinlong; Xiao, Wei; Shen, Yijun

doi:10.1016/j.nanoen.2021.106213

Cited by 127 publications

(68 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In view of this, a large number of methods to optimize SSG have emerged in recent years [ 7 ]. For example, Xiao et al cleverly designed an evaporator, including drilling holes and cutting water channels, which can accelerate the transportation and convection of water and improve evaporation due to the precipitation of salt [ 8 ]. Li et al designed a device that combines a three-dimensional vertebral absorber and a one-dimensional waterway to improve the evaporation area and evaporation rate [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Fe3O4/Diatomite-Decorated Cotton Evaporator for Continuous Solar Steam Generation and Water Treatment

Bai

Xu²,

Yang

et al. 2022

Materials

View full text Add to dashboard Cite

Improving the evaporation rate of solar steam generation (SSG) has always been a research hotspot to solve the shortage of water resources. Using cotton, Fe3O4, polyvinyl alcohol (PVA) and diatomite (DM) as raw materials, DM/PVA/Fe3O4@cotton composites with both firmness and hydrophilicity were prepared. Fe3O4 has a wide range of light absorption characteristics and good photothermal conversion performance, and is an ideal photothermal conversion material. PVA enhances the adhesion between Fe3O4, cotton and DM and enhances the hardness of the sample and the internal porous structure. The existence of DM greatly improves the hydrophilicity of the sample, ensuring that the water in the lower layer can be continuously transported to the surface of the sample, and DM makes the surface of the sample rough, which reduces the reflection of sunlight and improves the efficiency of light heat conversion. Under one-sun irradiation, the temperature of the sample surface increases by 52.6 °C, the evaporation rate can reach 1.32 kg m−2 h−1 and the evaporation efficiency is 82.9%. Using this sample as the photothermal conversion layer of the SSG device, the removal rate of salt ions in seawater is more than 98% and the removal rate of heavy metal ions in sewage is close to 100%. This work provides a new idea and design method for SSG in the field of seawater desalination and sewage treatment.

show abstract

Section: Introductionmentioning

confidence: 99%

Fe3O4/Diatomite-Decorated Cotton Evaporator for Continuous Solar Steam Generation and Water Treatment

Bai

Xu²,

Yang

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…When CB content reaches 1.6 wt%, the performance of P(AM‐ co ‐AA)/CB 1.6 is almost similar to that of P(AM‐ co ‐AA)/CB 2.2 (≈1% optical transmittance and ≈2% reflectance), indicating that the optimized CB content is 1.6 wt%.This outstanding optical extinction derives from the broadband light absorption of the CB and the multiple internal scattering of the 3D porous structure. [ 51,52 ] Thus, the surface temperature of P(AM‐ co ‐AA)/CB 1.6 in the dry state rises to ≈92.4 °C within 2 min under 1 sun and eventually stabilizes at ≈104 °C, in contrast to the P(AM‐ co ‐AA) that only reaches approximately 39.4 °C (Figure S7, Supporting Information). Besides, P(AM‐ co ‐AA)/CB with interconnected macroporous channels allows effective absorption of bulk water to the surface and continuous steam escape.…”

Section: Resultsmentioning

confidence: 99%

Solar‐Initiated Frontal Polymerization of Photothermic Hydrogels with High Swelling Properties for Efficient Water Evaporation

et al. 2021

View full text Add to dashboard Cite

As the population increases and environmental pollution intensifies, the scarcity of freshwater and green energy has emerged as hard nut to be urgently cracked. [1][2][3][4] Solar energy, as an abundant renewable power source, could be efficiently converted into thermal energy for seawater desalination, wastewater purification, and electricity generation to address these global issues. [5] Nevertheless, poor optical absorption, large heat losses, and high evaporation enthalpy of bulk water deliver a low solar evaporation efficiency (30%-45%). [6] Recently, many efforts have been devoted to rationalizing the design of material structures and evaporation systems to concentrate heat at the air/liquid interface, boosting evaporation efficiency to over 90%, even higher than 100%. [7][8][9][10][11][12][13] Among a variety of developed photothermal materials (e.g., semiconductors, [14,15] metallic, and carbonbased materials [16][17][18] ), hydrogel-based materials, as an emerging photothermic material possessing cross-linked interconnected three-dimensional (3D) networks, macroporous structure, and excellent hydrophilicity, have been extensively used to generate freshwater. [19][20][21][22][23] The porous structure of the hydrogels strengthens the internal light reflection and scattering, allowing enhanced light harvesting and absorption. [24,25] In addition, hydrogels with macroporous structure and hydrophilic functional groups enable them self-cleaning, anti-fouling, salt, and chemically resistant to improve the durability. [19,22] Most critically, the unique hierarchical nanostructure and tailorable surface wetting state of hydrogel evaporators enable the significant decrease of evaporation enthalpy and rapidly promote water transport, contributing to the ultrahigh evaporation rate. [25][26][27][28] However, conventional batch polymerization (BP) for hydrogel preparation is mostly achieved with assistance of pore-forming agents, complicated synthesis processes and continuous heat source or UV light that is commonly conducted in more stringent laboratory conditions. [29][30][31][32] The increasing cost and energy consumption of hydrogel fabrication and subsequent transportation in turn greatly hinder the practical application of the technology, especially for the remote area and sea platform needs.On the other hand, the swelling behavior, as the pivotal attribute of hydrogels, which influences the volume, surface area, and water storage performance of evaporators, is rarely investigated in the photothermal field. Basically, the swelling ratio of hydrogel materials could be improved by optimizing their pore structure, [33] thus enlarging the effective surface area and water

show abstract

“…Xiao et al [51] wrapped the melamine foam with MoS2-sodium alginate hydrogel as the solar evaporator, and it achieved an evaporation rate of 1.92 kg•m −2 •h −1 in the 3.5 wt.% NaCl solution under 1 sun irradiation. Even after 100 h in the brine with 20 wt.% salinity, the evaporation rate of the developed evaporator still reached 1.81 kg•m −2 •h −1 .…”

Section: Semiconductorsmentioning

confidence: 99%

Towards highly salt-rejecting solar interfacial evaporation: Photothermal materials selection, structural designs, and energy management

Wei

Wang

Guo

et al. 2022

Nano Research Energy

View full text Add to dashboard Cite

With the development of the industry, water pollution and shortage have become serious global problems. Owing to the abundance of seawater storage on earth, efficient solar-driven evaporation is a promising approach to relieve the freshwater shortage. The solar-driven evaporation has attracted tremendous attention due to its potential application in the seawater desalination and wastewater treatment fields. Also, the solar-driven evaporation efficiency can be enhanced by designing both solar absorbers and structures. Up to now, many strategies have been explored to achieve high solar-driven evaporation efficiency, mainly including the selection of photothermal conversion materials and structure optimization. In this review, the solar absorbers, structural designs, and energy management are proposed as the keys for high performance solar-driven evaporation systems. We report four kinds of solar absorbers based on different photothermal conversion mechanisms, substrate structure designs, and energy management methods for the purpose to achieve high conversion efficiency. And we also systematically investigate the available salt-rejections strategies for seawater desalination. This review aims to summarize the current development of efficient solar-driven evaporation systems and provide insights into the photothermal conversion materials, structural designs, and energy management. Finally, we propose the perspectives of the salt-rejection technologies for seawater desalination.

show abstract

A scalable, cost-effective and salt-rejecting MoS2/SA@melamine foam for continuous solar steam generation

Cited by 127 publications

References 45 publications

Fe3O4/Diatomite-Decorated Cotton Evaporator for Continuous Solar Steam Generation and Water Treatment

Fe3O4/Diatomite-Decorated Cotton Evaporator for Continuous Solar Steam Generation and Water Treatment

Solar‐Initiated Frontal Polymerization of Photothermic Hydrogels with High Swelling Properties for Efficient Water Evaporation

Towards highly salt-rejecting solar interfacial evaporation: Photothermal materials selection, structural designs, and energy management

Contact Info

Product

Resources

About