APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Ru Song,Ningshuang Zhang,Peng Wang,Hao Ding,Jie Wang,Shiyou Li
Interfacial water evaporation has emerged as one of the environmentally friendly technologies for seawater desalination and wastewater treatment. However, salt deposition issuesignificantly threaten the long-term stability of the evaporation system. Herein, we prepared a low-density nickel sponge (NSP) with porous network structure via a hydrothermal route. After polypyrrole (PPy) coating and hydrophilic modification, the NSP can be fabricated into a Janus evaporator (PPy-NSP). Benefiting from the PPy coating and rough skeleton, the light absorption of PPy-NSP evaporator is enhanced by up to 97.5%. Combined with the wide-spectrum solar absorption of PPy and porous network architectures, the Janus evaporators feature an outstanding evaporation rate of 1.71 kg m −2 h −1 under one sun irradiation. Moreover, the asymmetric wettability of the PPy-NSP evaporator effectively prevents salt deposition, which shows excellent salt resistance performance even in 15% wt% NaCl brine. Further testing reveals that the evaporator also exhibits excellent purification effects on dye solutions and heavy metal ions wastewater. The PPy-NSP evaporator also possesses magnetic properties, self-floating, and environmental friendliness, which may hold great potential applications in desalination, sewage treatment, and electromagnetic shielding.
研究领域:
材料科学
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环境科学
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能源工程
✓ 已验证
DOI
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Peng Feng,Donghai Xu,Youwei Zhi,Bing He,Shuzhong Wang,Yaling He,Yang Guo
This work aims to explore the ability of molten salt to solve salt deposition in supercritical water (SCW) related technologies including supercritical water oxidation and supercritical water gasification, with KNO 3 and Na 2 SO 4 as examples. In the pure KNO 3 solution, the two-phase layering of high-density KNO 3 molten salt (settling at the reactor bottom) and low-density saturated KNO 3 -SCW salt solution (flowing out at the top outlet of the reactor) was formed in a kettle-reactor with about 6.5 ratio of depth to inner diameter, thereby improving the accuracy of measured solubilities. The precipitation macro-characteristics of mixed KNO 3 and Na 2 SO 4 in SCW were investigated under different feed concentration conditions. The results showed that Na 2 SO 4 deposition on the reactor sidewall could be reduced by more than 90 % when the mass ratio of KNO 3 to Na 2 SO 4 in the feed was only 0.167. No visible salt deposition was observed on the sidewall when the ratio was 0.374. All solid deposited salts were converted into the liquid molten salt as the ratio reached 3.341, and thus could easily flow out of the reactor, without plugging. ‘Molten salt dissolution’ mechanism may provide a more plausible explanation for mixed KNO 3 and Na 2 SO 4 in SCW. In addition, the precipitation micro-mechanisms of mixed KNO 3 and Na 2 SO 4 , and the critical conditions of avoiding sidewall deposition and reactor plugging were proposed. This work is valuable for overcoming the salt deposition problem in SCW-related technologies.
研究领域:
化学工程
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环境科学
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超临界流体技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Bingsen Wang,Haotian Zhang,Nan He,Haonan Wang,Bo Jiang,Dawei Tang,Lin Li
Salt deposition is one of the most significant obstacles to emerging solar interfacial desalination. Several strategies have recently been developed to combat salt deposition. However, the poor performance of most reported salt-resistant evaporators (<1.5 kg m -2 h −1 ) severely restricts the practical applications of this technology. Inspired by seawater-grown mangroves, we propose a bionic hydrogel-aerogel composite (HAC) evaporator with a respiratory root structure in this work. This bionic evaporator consists of a high-osmotic-pressure polyacrylamide (PAM) ionic hydrogel and a hydrophobic aerogel with vapor transport channels. The vapor escape surface is spatially separated from the salt deposition interface by constructing numerous vapor escape channels within the bionic evaporator, resulting in highly efficient salt-resistant evaporation. The HAC evaporator can run salt-free for 50 h in seawater with an evaporation rate of 2.7 kg m -2 h −1 , which is twice that of most salt-resistant evaporators. In addition, the evaporator can achieve evaporation rates of 2.4 kg m -2 h −1 in 20% brine. This design significantly improves the evaporation rate when resistant to salt accumulation, providing a novel strategy for developing highly efficient, long-term stable solar interfacial evaporators.
研究领域:
材料科学
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环境科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liangri Ying,Fei Liang,Zhen Huang,Jing Ding,Weilong Wang,Shule Liu,Jianfeng Lu
Solar-driven steam generation is widely considered as a promising strategy for desalination. However, before this technology can be practically implemented, certain challenges such as suboptimal steam generation rates and inevitable salt deposition need to be addressed. In this study, we propose a novel bilayer structure aerogel (MS-aerogel), which confines urchin-like MoS 2 /Mo 5 N 6 /C in a biomass gelatin substrate to achieve high-efficiency desalination in high concentration brine solutions. The urchin-like MoS 2 /Mo 5 N 6 /C that hybrid semiconductor MoS 2 , plasmonic Mo 5 N 6 and porous carbon performs superior light-to-heat conversion performance to its individual components. Additionally, under the collaborative action of hydrophilic groups and unique nanostructured surface, the MoS 2 /Mo 5 N 6 /C exhibits a notable reduction in interface evaporation enthalpy from 2405.8 to 1694.6 J g −1 . Taking into consideration the comprehensive thermal management performance, the self-floating MS-aerogel achieves an excellent evaporation rate of 1.89 kg m -2 h −1 under one sun irradiation. Furthermore, the vertically aligned vessels present in the MS-aerogel facilitate salt transportation, effectively preventing crystalline salt accumulation on the evaporator surface. Consequently, even after continuous 12 h desalination in 20 wt% brine, the MS-aerogel maintains an outstanding evaporation rate of 1.54 kg m -2 h −1 , surpassing most reported self-floating evaporators. This research offers a valuable reference for the design of high-efficiency and salt-resistant solar evaporators.
研究领域:
材料科学
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能源工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Youyuan Xu,Yakun Tang,Lang Liu,Yue Zhang,Caixia Zhu,Xiang Bai,Zhiguo Li,Zhiwei Zhang,Biao Zhang,Sen Dong
Solar-driven interfacial evaporation is an environmentally friendly technology to address the global water scarcity crisis by efficiently purifying unavailable water resources (seawater, brackish water, high salinity wastewater and various water resources). However, the inevitable contradiction between salt deposition and highly efficient water evaporation during long-term desalination remains a major challenge. In this work, we report a self-floating bionic water lily evaporator with zero liquid discharge, consisting of CNT@cotton towel with the uneven-gap structure as the photothermal material and the square groove insulation foam with controllable water supply as edge-preferred crystallization support. The formed four-building-in ramp structure generates different surface tensions along the whole ramp and brings Marangoni flow. With the combination of Marangoni flow and optimal water supply volume, salt is spatially isolated from the CNT@CT surface, the biomimetic design can achieve continuous water evaporation and salt collection (79 g m -2 h −1 ) for 84 h in 10 wt% NaCl under edge-preferred crystallization. The purified water meets drinking water standards and is applied to growing crops. This distinctive solar evaporator provides new insights for designing a low-cost and zero-liquid-discharge evaporator, advancing its application in high-saline brines, various water resources, and irrigation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Yanhua Lei,Longjie Xie,Shengjia Cao,Zhipeng Wang,Hailiang Du,Kai Sun,Dongsheng Wang,Yuliang Zhang
Interfacial evaporation is one of the most promising technologies for harvesting solar energy to generate steam. Here, we report a solar interfacial evaporator with excellent self-cleaning property via a well-designed artificial channel array in the raw wood substrate. This device shows high light absorption nearly 90% and high solar-to-vapor conversion efficiency of ~88.2% of pure water under one sun irradiation. In addition, due to the existence of two different channels on the device surface: man-made millimetre-sized cutting channels and micro-channels formed by natural growth, the deposition of salt was reduced and its long-term stability in the NaCl solution (over 80 h of continuous operation) was increased. Based on the above conditions, the PCW-7 × 7 still maintains its efficiency at about 80.0% and 73.4% at 1 kW m -2 irradiation in the different simulated seawater with different salinities (3.5 and 20 wt%).
研究领域:
材料科学
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能源技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiang Liu,Ping Wang,Bin Liao,Yuan Luo,Kaiqi Yan,Jingjie Zhang
The 3D structure design as an available pathway is sufficiently demonstrated to improve the evaporation performance of solar evaporators. However, the evaporator with a 3D structure exhibiting high evaporation performance results in an increased rate of salt precipitation, which places a higher demand on salt resistance. Therefore, it remains a great challenge to overcome the salt accumulation at the evaporator surface, especially for a 3D cylindrical evaporator. Here, a novel 3D evaporator is developed that integrates an air-laid paper stick and chitosan/CNT (CSC) aerogel, featuring unique water transport channels designed to facilitate the radial transport of salt solution and directional precipitation towards the top edge. It is proved that increasing the height of the evaporator effectively improves the evaporation performance through experiments and thermodynamic calculations. In addition, the effect of relative humidity on the evaporation performance of the 3D interfacial evaporator was systematically studied. On this basis, the effects of including material properties, solution properties, and working environment on the salt deposition behavior are further investigated, which can guide researchers to rationally design according to specific conditions to achieve edge-directed salt deposition.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
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2021
·
IF 9.501
Xu Ma,Xinyi Wan,Zhou Fang,Zhuoyi Li,Xiaobin Wang,Yue Hu,Mengyang Dong,Zhizhen Ye,Xinsheng Peng
Solar-driven interfacial desalination (SDID) has emerged as an efficient and eco-friendly technology to produce clean water. However, salt deposition on photothermal material severely restricts the operation stability and service life. Herein, this issue was addressed by regulating the oriented seawater transportation through flexible Cu(TCNQ) metal-organic frameworks (MOFs)-based nanorod arrays (MAS) and isolating the salt crystallization from the evaporating surface. The SDID device with the novel architecture is rationally designed, which not only shows good anti-salt deposition ability and superior clean water production performance, but also achieves simultaneous salt extraction. Under 1 sun irradiation, the MAS in SDID device displays an impressive water evaporation rate of 1.78 kg m −2 h −1 (projected area) and a high salt extraction rate of 47.0 g m −2 h −1 . Even at night, the MAS can also extract salt at the rate of 12.6 g m −2 h −1 . This work provides a new idea to design highly efficient multifunctional solar desalination device for seawater resource comprehensive utilization and zero-liquid discharge.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xiaopeng Huang,Lingxiao Li,Xia Zhao,Junping Zhang
Interfacial solar-driven evaporation (ISE) is one of the most promising solutions for collecting fresh water, however, poor salt-resistance severely limits the long-term stability of solar evaporators. Here, highly salt-resistant solar evaporators for stable long-term desalination and water harvesting were fabricated by depositing silicone nanoparticles onto melamine sponge, and then modifying the hybrid sponge sequentially with polypyrrole and Au nanoparticles. The solar evaporators have a superhydrophilic hull for water transport and solar desalination, and a superhydrophobic nucleus for reducing heat loss. Spontaneous rapid salt exchange and reduction in salt concentration gradient were achieved due to ultrafast water transport and replenishment in the superhydrophilic hull with a hierachical micro-/nanostructure, which effectively prevents salt deposition during ISE. Consequently, the solar evaporators have long-term stable evaporation performance of 1.65 kg m -2 h −1 for 3.5 wt% NaCl solution under 1 sun illumination. Moreover, 12.87 kg m −2 fresh water was collected during consecutive 10 h ISE of 20 wt% brine under 1 sun without any salt precipitation. We believe that this strategy will shed a new light on the design of long-term stable solar evaporators for fresh water harvesting.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lin Chen,Yue Sun,Chao Ma,Ye Sun,Shuyi Peng,Xingyu Cao,Lang Yang,Chunxin Ma,Hongliang Zhao,Hao Wang,Dong Zhang,Qijie Liu,Zhenzhong Liu,Yihui Yuan,Ning Wang
Huge seawater resources are of utmost importance in addressing the increasing and severe water shortage worldwide. However, high-efficiently and sustainably extracting fresh water from seawater through solar evaporation remains a challenging task. Herein, we propose a novel approach based on the morph-genetic biomimetic concept, utilizing a cuttlebone-templated directional porous hydrogel (CTDPH). By etching away the cuttlebone (CaCO 3 ) in the hydrogel network, we have developed a zwitterionic material that exhibits high-efficiency photo-thermal conversion, resistance to salt deposition, and super hydrophilicity, enabling high-efficiency solar evaporation. The resultant CTDPH demonstrates a high level of photo-thermal conversion efficiency, thanks to the incorporation of MXene (Ti 3 C 2 T x ) 2D nanosheets. By introducing polyzwitterions into the hydrogel matrix, the CTDPH achieves superhydrophilicity, greatly enhancing the transport of seawater. More importantly, the CTDPH possesses a penetrating oriented macro-porous structure, enabling rapid seawater transportation while effectively preventing salt crystallization. This prevents salt deposition on the surface of the hydrogel even during continuous 12-hour 1.0 sun irradiation. As a result, compared with the MXene-free gels and cuttlebone-reserved gels, this CTDPH can largely increase the seawater evaporating rate from 0.73 or 1.75 to 3.11 kg m -2 h −1 under 1.0 sun irradiation. Furthermore, even after undergoing 10 cycles of seawater evaporation, the CTDPH still maintains 91.6% of its original solar evaporation rate (2.85 kg m -2 h −1 ). The CTDPH emerges as a promising contender, offering both high efficiency and sustainability for solar evaporation from seawater, while simultaneously paving the way for innovative approaches to explore other materials and systems in the realm of solar evaporation.
研究领域:
材料科学
·
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Linzhi Zuo,Yang Li,Long Cheng,Tao Yu,Yiting Che,Shitan Yan,Kiushkin Vladimir Yurievich,Ting Bian,Daifen Chen
Interfacial solar steam generation (ISSG) technology is considered to be one of the most promising approaches to alleviating the global shortage of clean water due to its high solar thermal conversion efficiency. However, achieving stable evaporation in high salinity solutions and preventing the occurrence of salt deposition phenomena remains a challenge. Here, an efficient and stable photothermal membrane-based evaporator has been developed, which consists of polydopamine (PDA) modified leaf-like zeolitic imidazolate framework (ZIF-L) implanted in sodium alginate (SA) membrane supported on a melamine sponge (S-ZIF-L/PDA sponge), providing more advantages for boosting the photothermal conversion performance and preventing salt deposition. This S-ZIF-L/PDA sponge displays an excellent light absorption (>95 %), and remarkable evaporation rate of 1.66 kg·m −2 ·h −1 with a solar-thermal efficiency of 91.06 % under 1.0 sun (1 kW·m −2 ) illumination. Benefiting from the super hydrophilic feature of the melamine sponge and the rejection properties of the SA membrane structure, the obtained sponge effectively prevents salt and contaminants from depositing on the surface. Particularly, the S-ZIF-L/PDA sponge achieves an evaporation efficiency of 86.17 % in 20 wt% NaCl solution, along with excellent resistance to salt deposition and marvelous stability in cycling tests. The salt ion concentration of the obtained fresh water is much lower than the World Health Organization (WHO) drinking water standard, and the organic removal rate exceeds 99 %. This work provides a competitive solution for high-salinity desalination and wastewater treatment.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Yan Lv,Runmin Xu,Kaiting Zhang,Lu Hong,Juan Zhou,Beibei Weng,Zuyu Huang,Shanshan Wu,Yong Guo,Yuxia Chen
In this study, agricultural waste luffa vines (LVs) were used to develop solar evaporators by surface carbonization and KOH treatment combined with freeze-drying method. Scanning electron microscopy (SEM), solar absorption, solar thermal management and salt dissolution tests showed that the water vapor generation rate of a single column of LV-based solar evaporator after surface carbonization was as high as 3.26 kg m −2 h −1 under 1 sun, and its evaporation efficiency (118%) even exceeded the theoretical valve. After 36 h of continuous use, there was almost no salt deposition. Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), contact angle, thermal conductivity, evaporation enthalpy, and low field nuclear magnetic resonance (LF-NMR) analyses indicated that the high evaporation efficiency of LV-based solar evaporators after surface carbonization was mainly due to high water transport capacity, low water evaporation enthalpy, and high light absorption rate (91%) of LV. The excellent salt-deposition resistance benefitted from the natural multilayered gradient porous structures of LV, forming spontaneous salt backflowing systems. The desalinization rate of LV-based solar evaporators exceeded 99.9%, which was even higher than those of many membrane elements and thermal desalination systems. They also had excellent removal effects on dyes and oily wastewater. After 30 d of continuous soaking, the compressive strength of 2–cm LVs was still 9.4 MPa. KOH-freeze-drying treatment further improved the salt-deposition resistance of LV-based solar evaporators, but reduced their evaporation efficiency and mechanical performance. This work suggests that LVs with carbonized surface have significant potential for development of environmentally friendly biomass solar evaporators with efficient evaporation, excellent resistance to salt deposition, and good durability.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 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）