DESALINATION
·
2025
·
IF 9.8
Huan Jiao,Xinyu Guo,Chaofeng Zhang,Sha Wang,Wenjuan Wu,Yongcan Jin,Zhiqiang Liang,Bo Jiang
With natural hierarchical porous and anisotropic cellular structure, wood yields a great opportunity for solar-driven water desalination but is limited in interfacial evaporation efficiency due to its inherent low photothermal conversion. Although the photothermal materials decoration and the high-temperature carbonization have been proposed, these methods often lead to poor interfacial compatibility and thermal management. Herein, a space-confined carbonization strategy of wood cellular structure was developed to construct an all-in-one solar-driven evaporator for efficient water desalination and evaporative power generation. The gradient carbonization of cellular structure caused by immersed wood into concentrated H 2 SO 4 endows wood surface with improved photothermal conversion efficiency (91.6 %), and the interior cellular structure with natural hydrophilic (hemi)cellulose enables rapid water transportation. As a result, the space-confined carbonized wood exhibits high evaporation performance, with the evaporation rate up to 2.1 kg m −2 h −1 under 1 sun. The concentration difference of ions caused by water evaporation can also achieve power generation, with the timing current and voltage up to 34 mA and 1187 mV, respectively. In addition, the H 2 SO 4 is reusable without affecting the evaporation stability. The developed space-confined carbonized wood also demonstrates good adaptability to various water environment. This feasible space-confined carbonization strategy provides a new sight to construct all-in-one wood-based solar-driven evaporators for improving the water desalination and evaporative power generation performance.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2023
·Vol. 16
·期 6
·2494-2504
·
IF 32.5
Nan He,Haonan Wang,Fan Li,Bo Jiang,Dawei Tang,Lin Li
Hydrovoltaic electricity generators (HEGs), powered by ubiquitous water evaporation, are emerging due to their high spontaneity and continuity. However, the current performance of most HEGs is restricted to 50.00 μA cm−2, far from commercial applications. Herein, we propose an ion-engine HEG by establishing a concentration gradient of an ionisation group in hydrogels along the direction of ion migration. The distinctively designed ion gradient acts as an engine to accelerate ion migration by enhancing diffusion, hence increasing the generated current. Notably, the ion-engine HEG generates a record-breaking current density of 466.75 μA cm−2, 10 to 100 times higher than those of previously reported HEGs. The ion-engine HEG possesses the lowest internal resistance, which is the closest to that of commercial products. In addition, the high transparency, flexibility, and customisability of hydrogels offer HEGs a wide range of applications, such as night-time lighting, sweat monitoring, and powering small unmanned boats. These findings provide a fresh perspective on high-performance HEGs, which have great potential to serve energy technology and intelligent life.
研究领域:
能源技术
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Matter
·
2025
·
IF 17.5
Chaoran Liu,Zai Wang,Xin Tong,Zhenhua Wu,Lin Zhou,Haiyang Zou,Ayodeji Ogunjuyibe,Hongjian Lin,Dongfang Yan,Weihuang Yang,Linxi Dong,Gaofeng Wang,Zhong Lin Wang
Harvesting sustainable electricity from natural water evaporation has been attracting attention as a promising alternative to supply power for low-power systems. However, low-current output and rigid materials largely hinder its extensive applications. Herein, we present a water-evaporation-induced high-direct-current electricity generator based on stretchable flexible hydrogel/Al 2 O 3 . This flexible electricity generator forms a porous Al 2 O 3 substrate by dissolving the NaCl from the heat-cured gelatin/Al 2 O 3 /NaCl. It achieves a sustainable and stable direct current of 32 μA, a low internal resistance of 5.18 kΩ, and a maximal output power of 1.76 μW with a maximum output power density of 0.55 mW m −2 by optimizing the electricity generator’s physical dimensions and concentration ratios. The developed water-evaporation-induced electricity generator shows many application prospects, including as a power supply for digital calculators and hygrothermographs and to drive a boat of 5.1 cm. This research provides an in-depth study on a stretchable high-direct-current water-evaporation-induced electricity generator and an efficient approach to power supplies for low-power systems.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Soft Matter
·
2021
·Vol. 17
·期 18
·4730-4737
·
IF 3.679
Hao Sun,Xin Li,Jun Chen,Haiyan Zhu,Hongyan Miao,Ying Li,Xuefeng Liu,Gang Shi
For the solar water evaporation system, there are no reports on the self-healing support, which is crucial for the sustainable use of solar evaporation membrane. In this work, a self-healing hydrogel is prepared via free radical copolymerization with covalent cross-linking and coordination cross-linking and is used as a photothermal water evaporation support. The photothermal material is then introduced into the hydrogel by physically doping acetylene carbon black. At the same time, inverted micro-pyramids are fabricated on the surface of the hydrogel by soft imprint to increase the utilization efficiency of incident light. The water evaporation rate of the composite membrane can reach 1.58 kg m−2 h−1, and the breaking elongation is 1580%. It can self-heal after it is completely broken, and can still be stretched 3 times its original length. The design of this self-healing photothermal membrane will provide a new idea for its application in a harsh outdoor environment.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Cuiping Bu,Xingzhen Zhang,Aqiang Chu,Xue Cao,Shenxiang Zhang,Jian Jin
Solar-driven evaporation has received widespread attention in obtaining fresh water from seawater and wastewater. However, a major challenge in this process is maintaining a high evaporation rate, while preventing salt accumulation. Herein, a hydrophilic tannic acid (TA)-induced polypyrrole (PPy) coating layer with a controllable thickness was developed on nonwoven fabric using a layer-by-layer (LbL) assembly technique. TA along with pyrrole (Py) molecules was first deposited on the substrate surface through noncovalent interactions. Then, Fe3+ was bonded with TA through metal coordination, acting as an oxidant for the polymerization of Py molecules. After the LbL cycle process, a uniform TA/PPy coating was formed on the fabric surface, exhibiting excellent hydrophilicity and solar absorption performance. The roof-structure evaporation system was then built by placing the fabric on the roof-structure support, ensuring that seawater flows from top to bottom. This structure helps to remove the concentrated brine from the fabric at the bottom of the evaporator, thereby preventing the accumulation of salt crystals. This design results in a high evaporation rate of 2.67 kg m–2 h–1 and a comparable evaporation efficiency of 89.6% under 1 sun irradiation. It is possible to achieve rapid and continuous evaporation even with high-concentration saline water containing 21% NaCl. Therefore, this study provides a simple construction of TA/PPy coatings suitable for different substrates and demonstrates the design of a roof-structure evaporation system for efficiently producing fresh water from seawater and high-salinity wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Yuqian He,Linlin Yan,Mi Zhou,Kai Wang,Yingjie Zhang,Enrico Drioli,Jun Ma,Xi Quan Cheng
Interface solar-driven evaporators capture sunlight and concentration of heat at the vapor-liquid interface to efficiently evaporate water. However, challenges remain in the preparation of evaporators with a high evaporation rate and efficiency of photothermal conversion. Herein, an advanced carbon-based aerogel evaporator was designed by carboxylated multiwalled carbon nanotubes (MWCNTs-COOH) and cellulose nanofiber (CNF) entangling with each other as a backbone and in-situ polymerized polypyrrole (PPy) to constitute three-dimensional (3D) porous structure for highly efficient photothermal desalination and wastewater purification. The combination of MWCNTs-COOH with PPy reduces the energy gap (0.91 eV), endowing the aerogel with excellent photothermal conversion properties. The porous MWCNTs-COOH/PPy/CNF(CPCA) aerogel possesses an extremely low density of 0.048 g m −3 and excellent water transport capability, which exhibited a high water evaporation rate (2.48 kg m −2 h −1 ) and superior energy efficiency (90.2 %) under one sunlight intensity. The designed water evaporator can be stably and continuously applied in desalination and wastewater purification, and it is expected to be used for water purification to alleviate the worldwide water challenge.
研究领域:
材料科学
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环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yongfeng Wang,Changlei Ge,Mingxu Wang,Jun Ma,Yuchen Zhou,Shuqi Wang,Mengyuan Liu,Qiang Gao,Feijun Zhao,Qingqing Cheng,Feng Wen,Yujie Liu,Hao Shen,Lianhui Li,Ting Zhang
The evaporation-induced hydrovoltaic effect represents a promising avenue for green energy harvesting and self-powered ion sensing. However, the intricacies of designing the solid-liquid interface and the insufficient systematic research on the influence of interface parameters on hydrovoltaic performance hinder the advancement of high-performance hydrovoltaic devices. Herein, the governing principles of nanochannel size, material conductivity, surface properties, and water evaporation on the hydrovoltaic effect based on the multidimensional regulation of nanochannels by dip-coating and carbonization processes are systematically elucidated. Guided by the obtained influence mechanisms, a high-performance flexible hydrovoltaic sensing device with photothermal conversion capability is prepared, exhibiting an open-circuit voltage exceeding 3.5 V and a wide univalent ion sensing range of 10 −7 –10 −1 m . Ultimately, the fabricated flexible hydrovoltaic device successfully serves for self-powered electrolyte monitoring. These results systematically elucidate the correlation between the controllable design of solid–liquid interfaces (on structure, material conductivity, surface properties, and environmental factors) and high-performance hydrovoltaic devices, paving the way for practical applications.
研究领域:
材料科学
·
能源技术
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Advances
·
2021
·Vol. 2
·期 9
·3088-3098
·
IF 0
Jia-Yun Wang,Xiao-Xiao Guo,Jun Chen,Shi-Chang Hou,Hui-Juan Li,Abdul Haleem,Sheng-Qi Chen,Wei-Dong He
Photothermal water evaporation, benefiting from solar energy, is one hot topic concerning seawater desalination, sewage treatment, and water recovery. Commonly, the photothermal evaporation system consists of photothermal material supported by certain matrices with fundamental necessities. Poly(acrylic acid) (PAAc) cryogels, prepared at the temperature below the freezing point of polymerization mixture, are hierarchically macro-porous and highly hydrophilic with rapid water uptake, speedy water transport, and low thermal conductivity. Moreover, PAAc has the acid-doping ability for polyaniline and polypyrrole (PPy), which faciliates the good incorporation of photothermal materials in a cryogel matrix. Thus, the PAAc cryogel is an excellent platform for photothermal water evaporation. In this research, we prepared PAAc cryogels, incorporated different photothermal materials, and constructed the modular water evaporation systems. The photothermal evaporation rate of pure water with the PAAc-PPy cryogel system reached as high as 1.819 kg m−2 h−1 while its apparent efficiency surprisingly exceeded 100%. These modular systems exhibited excellent long-term and recyclable utility. As for the photothermal evaporation of salty water, the precipitated salt solid could be spontaneously dissolved during the light turnoff due to the quick water transport, maintaining the high water-to-vapor conversion. This study represents an ideal matrix platform, PAAc cryogel, for photothermal evaporation and opens up a new route to improve the photothermal evaporation technique for water purification and seawater desalination.
研究领域:
材料科学
·
环境科学
·
能源研究
✓ 已验证
产品关联
DOI
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 9
·2249-2255
·
IF 6.813
Zaimiao Zhang,Yaru Zheng,Nan Jiang,Wenqing Hong,Tianyu Liu,Hao Jiang,Yanjie Hu,Chunzhong Li
Electric energy harvesting from natural water evaporation has attracted great attention in the sustainable development of human society. However, ultra-low short-circuit current extremely hinders its widespread deployment. Herein, we report a high-performance wood-based hydroelectric generator (WHEG) based on highly conductive carbonized wood (C-wood) with abundant hydroxyls via a Lewis acid metal salt-catalyzed carbonization strategy. The high hydroxyl content greatly improves the zeta potential and the high electrical conductivity remarkably reduces the internal resistance, thus boosting the output of electrical energy from water evaporation. These advantages make the obtained WHEG (6.5 × 1.5 × 0.4 cm3) exhibit an open-circuit voltage of 96 mV and a remarkable short-circuit current of 10.5 μA under ambient conditions (45% RH, 25 °C), which is an order of magnitude higher than that of most previous studies. Furthermore, commercial electronics such as calculators and LEDs can be powered by the WHEG system in series or parallel connections.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 11
·15043-15053
·
IF 4.672
Ming Li,Zhenning Zhang,Fan Yang,Weiming Wang,Shuai Peng,Xixian Yang,Jun Xiong,Xue Min
Summary 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 PPy-decorated 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 −2 h −1 , 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 −2 h −1 . 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.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ruizhi Xue,Ruirui Huang,Binbin Wu,Ning Li,Qing Chang,Chaorui Xue,Caihong Hao,Huiqi Wang,Jinlong Yang,Shengliang Hu
Interfacial solar driven water evaporation (ISDWE) and photocatalytic pollutant degradation (PPD) have been considered as efficient and green technologies for tackling the water crisis. Here, through hydrothermal treatment of TiH 1.924 /Ti powders, we designed a hybrid material composed of partially oxidized TiH 1.924 and TiO 2 nanosheets with outstanding ISDWE and PPD performances. Titanium suboxides can be formed inside the compound of partially oxidized TiH 1·924 /TiO 2 nanosheet, and induce efficient solar-thermal transformation. Meanwhile, TiO 2 nanosheet is conducive to reducing the water vaporization enthalpy, ensuring adequate water supply, and enlarging the surface area for evaporation. Due to the synergies between partially oxidized TiH 1.924 and TiO 2 nanosheet, the water evaporation rate achieved 1.70 kg m −2 •h −1 under solar radiation of 1.0 kW m −2 , which is higher than most reported titanium compounds. The investigation on the PPD performance showed that the photothermal effect and band alignment collaboratively improved the photodegradation of rhodamine B by partially oxidized TiH 1·924 /TiO 2 nanosheets. The excellent PPD property can promote the long-term ISDWE application of partially oxidized TiH 1·924 /TiO 2 nanosheets by avoiding the dye accumulation. This study may provide valuable information for developing advanced composites, ISDWE and PPD technologies.
研究领域:
环境科学
·
材料科学
·
纳米技术
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Song Ge,Jun Song,Jichao Zhang,Xiu-Li Yang,Ming-Hua Xie
Solar-driven interfacial evaporation offers a viable pathway for alleviating global water shortages. However, a significant challenge arises when the source water contains organic contaminants, as the evaporation process can lead to the enrichment and exacerbation of pollution in the remaining water. Herein, we constructed a flexible bifunctional nanofibrous membrane evaporator featuring a gems-on-string structure, designed to concurrently realize clean water production and source water purification. This was achieved through the uniform decoration of polypyrrole (PPy) nanoparticles onto silica nanofibers, followed by the tactful immobilization of zeolitic imidazolate framework (ZIF-67) polyhedrons on the fibers via a facile hot-pressing approach. The micro-nano hierarchical structure of the gems-on-string fibers enables multiple reflections between adjacent gems, significantly enhancing full-spectrum light absorption (96.3 %) and photothermal conversion. Moreover, the superhydrophilic and hierarchically interconnected channels within the membrane facilitate water transport and evaporation enthalpy diminution. Furthermore, the synergistic effects of localized heat from PPy, and photocatalysis and cobalt sites from ZIF-67 significantly promote the activation of peroxymonosulfate. As a result, the bifunctional evaporator achieves a rapid evaporation rate (2.29 kg m -2 h −1 ) with a remarkable solar-water conversion efficiency (93.2 %) under one sun, outperforming most state-of-art evaporators, while maintaining superior oxytetracycline removal (92.5 %). Significantly, the evaporator delivers a daily freshwater output (5.3 kg m −2 ) when treating complex wastewater/seawater. This study not only presents an efficient strategy for fabricating flexible high-performance photothermal-catalytic membranes, but also provides a sustainable platform for freshwater production and sewage purification.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）