Membranes
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2022
·Vol. 12
·期 2
·122
·
IF 4.562
Tong Li,Yuhong Wang,Xinyan Wang,Caixia Cheng,Kaifeng Zhang,Jie Yang,Guangshuo Han,Zhongpeng Wang,Xiuju Wang,Liguo Wang
Forward osmosis membranes have a wide range of applications in the field of water treatment. However, the application of seawater desalination is restricted, so the research of forward osmosis membranes for seawater desalination poses new challenges. In this study, zeolitic imidazolate framework-8 (ZIF-8) was synthesized by a mechanical stirring method, and its crystal structure, surface morphology, functional group characteristics, thermochemical stability, pore size distribution and specific surface area were analyzed. The cellulose acetate (CA)/ZIF-8 mixed matrix forward osmosis membrane was prepared by using the synthesized ZIF-8 as a modified additive. The effects of the additive ZIF-8 content, coagulation bath temperature, mixing temperature and heat treatment temperature on the properties of the CA/ZIF-8 forward osmosis membrane were systematically studied, and the causes were analyzed to determine the best membrane preparation parameters. The structure of the CA membrane and CA/ZIF-8 mixed matrix forward osmosis membranes prepared under the optimal conditions were characterized by Fourier Transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), contact angle and Atomic force microscope (AFM). Finally, the properties of the HTI membrane (Membrane manufactured by Hydration Technology Innovations Inc.), CA forward osmosis membrane and CA/ZIF-8 mixed matrix forward osmosis membrane were compared under laboratory conditions. For the CA membrane, the water flux and reverse salt flux reached 48.85 L·m−2·h−1and 3.4 g·m−2·h−1, respectively. The reverse salt flux and water flux of the CA/ZIF-8 membrane are 2.84 g·m−2·h−1and 50.14 L·m−2·h−1, respectively. ZIF-8 has a promising application in seawater desalination.Keywords:desalination;ZIF-8;forward osmosis membranes
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Ya’nan Zhao,Long Yu,Jiarong Zhang,Tianran Zhao,Yi’na Yang,Chunna Yu,Chang Zhao,Guangjian Xing
The utilization of solar-driven seawater evaporation technology has proven effective for seawater desalination. This study focuses on developing Ta 4 C 3 T X /melamine sponges through a straightforward dipping-drying procedure. The porous melamine sponges, loaded with Ta 4 C 3 T X MXene within their framework, display remarkable elasticity, amphiphilicity, sunlight absorption capacity, and thermal stability due to the synergistic effects of the MXene and the sponge matrix. The Ta 4 C 3 T X /melamine sponges demonstrate superior photothermal conversion performance under sunlight irradiation. Under 1 sun, the sponges recorded an evaporation rate of 1.33 kg∙m −2 h −1 and a conversion efficiency of 83.79 %. Furthermore, outdoor assessments corroborated the sponges' impressive efficacy in seawater evaporation across diverse weather conditions. Significantly, these sponges exhibited self-desalination capabilities and long-term stability throughout the seawater evaporation process. Notably, the photothermal efficiency of the sponges is enhanced in proportion to the content of Ta 4 C 3 T X . Beyond seawater evaporation, these sponges have also demonstrated their effectiveness in applications such as deicing and photothermal therapy applications. Additionally, the sponges demonstrated a capacity to absorb oils and organic solvents, with an absorption capacity ranging between 19 and 55 g∙g −1 . Given their affordability, straightforward fabrication process, sustainability, and effective photothermal performance, the Ta 4 C 3 T X /melamine sponges present new opportunities for the development of multifunctional materials aimed at desalination and pollution remediation.
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
ACS Applied Nano Materials
·
2023
·
IF 5.9
Qiang Xue,Wenqiao Meng,Qing Fang,Jinyuan Zhu,Kaisong Zhang
Over the last decade, thin-film nanocomposite (TFN) membranes have been extensively utilized in desalination and wastewater treatment. The most reported nanochannels in the TFN membranes lack sufficient observational evidence. We conducted a systematic study on the TFN membrane that incorporated two-dimensional (2D) MXene nanosheets and provided evidence that nanovoids existed in the polyamide layer surrounding the nanosheets. The nanovoids functioned as nanochannels for water, which led to a significant increase in membrane permeance by 2.8 times compared to the blank membrane. The Na2SO4 rejection of the MXene polyamide membrane is as high as 96.4% and has obvious advantages in seawater desalination. The size of the nanochannels was correlated with the quantity, size, and spreadability of MXene nanosheets. Larger water nanochannels could be formed if there is a considerable amount and size of nanosheets, and they were evenly distributed. After being subjected to a sustained pressure environment, the nanochannels remained intact and the membrane maintained its excellent permeance across varying pressures. Our work could offer a perspective on the generation of internal nanochannels in the TFN membrane and optimize nanochannels to provide better desalination performance.
研究领域:
材料科学
·
环境工程
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2018
·
IF 3.306
Li-Zhi Zhang,Qian-Wen Su
Membranes of low thermal conductivity (thermal insulation) but high moisture permeability are highly desired in membrane-based humidification-dehumidification (MHDD) seawater desalination technology. The porous membranes with thermal insulation could decrease the heat losses in humidification, thus the system energy performance can be improved. To satisfy this purpose, in this study, a PVDF/SiO 2 (Si aerogel) composite bilayer membrane of low heat conductivity is prepared and analyzed. To solve the problem of cracking in forming SiO 2 layer, the casting solution (TEOS, H 2 O) is doped with a drying control chemical additive (DCCA) N, N -dimethylformamide (DMF) to decrease the surface tensions in the gel. Then performance analysis of the developed membranes are conducted and the membranes are characterized. The results found that the heat conductivity is decreased from 0.08199 W m −1 K −1 to 0.04487 W m −1 K −1 , with a penalty of effective moisture diffusivity sacrificed from 4.93 × 10 −6 m 2 /s to 2.42 × 10 −6 m 2 /s. They are superior to the available SiO 2 blend insulation membranes. Further, the membranes can be optimized by facile structural manipulations such as adjusting the SiO 2 layer thickness to realize the desired performance while balancing the paradox between the permeability and heat conductivity. This is the first time that heat conductivity of membranes can be manipulated for seawater desalination.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
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2018
·
IF 6.603
Guihua Xie,Wenxuan Xu,Qingchun Ge
Gradual ionizing forward osmosis (FO) membranes were synthesized through tailoring modifications with alendronate materials on polyamide thin film composite (TFC) membrane surfaces . The newly developed membranes have gradually ionized surfaces and are more hydrophilic after introducing amino, hydroxyl and phosphate groups derived from the alendronates. Significantly improved performance was achieved with the alendronate-modified membranes relative to the unmodified membrane. With DI water as the feed and 0.5 M MgCl 2 as the draw solution, the novel membranes yielded water fluxes 35–60% higher than the nascent one. When MgCl 2 (2.0 M) as the draw solution, alendronate tetrasodium (A-4Na) modified membrane had a water permeation rate of 17.3 LMH under FO mode (feed solution faced the membrane active layer) in seawater desalination , a 25% increase compared to that of the pristine membrane and surpasses many other recently-developed FO membranes, remarkably increasing water filtration efficiency.
研究领域:
化学工程
·
环境科学
·
材料科学
·
水处理
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shuang Li,Tong Liu,Yao Yao,Mingzhao Yang,Feifei Li,Zebin Zhao,Shan Zhang,Gaohong He,Xiangcun Li
Solar powered interfacial water evaporation has become one of the most direct and sustainable technologies for seawater desalination. However, developing an efficient, stable evaporator with good salt resistance is a critical and challenging. In this work, MoS 2 -CNT@C membranes synthesized by loading 1T/2H MoS 2 flower spheres on the CNT@C hierarchically porous membrane by hydrothermal method are used as solar water evaporators. MoS 2 -CNT@C membranes, as photothermal conversion materials, have broadband solar absorption capacity and good hydrophilicity. The porous structure of CNT@C membrane can provide great water transport channels, and the decoration of flower spheres MoS 2 enhances the internal reflection which can increase the sunlight absorption capacity, resulting in a jump in water evaporation properties. The membrane has a high evaporation rate of 2.53 kg m −2 h −1 under one sun illumination. In addition, the evaporation rate of the sample in seawater reaches 2.51 kg m −2 h −1 , similar to that in the pure water, and remains stable after several evaporation cycles, ensuring that high quality fresh water can be produced during the desalination.
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
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zhenguo Wang,Ke Yu,Shijing Gong,Huibing Mao,Rong Huang,Ziqiang Zhu
Two-dimensional materials with unique physical and chemical properties have recently attracted widespread attention in the field of solar thermal conversion. However, affected by the Fresnel effect, traditional two-dimensional materials such as MXenes, graphene, transition metal disulfide often have relatively significant light reflection losses at the solid–liquid or gas interface. So how to improve the light absorption of the two-dimensional material performance has become a new challenge in photothermal conversion. Here, we use an improved thermal-injection method to uniformly grow Tricopper(I) Bismuth Sulfide (Cu3BiS3, CBS) on the surface of Ti3C2 nanosheets in a nonaqueous polar solvent environment. A three-dimensional nanoflower-nanosheet structure CBS-Ti3C2 for photothermal conversion has been constructed successfully. Owing to the excellent photothermal performance of Cu3BiS3 in the near-infrared region, the good thermal conductivity of Ti3C2, and the unique porous structure of the composite material, the composite achieves broadband absorption of light (more than 90% in the visible light region, more than 80% in the near-infrared region), which optical model and finite element simulation have theoretically verified. The composite material has obtained higher solar-to-heat conversion performance than similar material systems, and the steady-state temperature can reach 62.3 °C under 1 sun incident light intensity. CBS-Ti3C2 is expected to become a light-absorbing layer material for solar vapor generation devices due to its excellent light-to-heat conversion performance and good material flexibility. It still guarantees a reasonably high steam generation rate (1.32 kg·m–2·h–1) even with a thinner material thickness (0.48 mg·cm–2) and a comprehensive conversion efficiency higher than 90%. Besides, CBS-Ti3C2 also exhibits the characteristics of resisting surface salt accumulation, which is conducive to maintaining the long-lasting photothermal seawater evaporation process. The material’s electronic structure and the charge transfer process of the heterojunction interface have been studied with the first-principles calculation. The high light absorption performance and good thermal conductivity of the composite material are theoretically explained and supported.
研究领域:
材料科学
·
能源科学
·
环境科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
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
·
环境科学
·
能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yang Jin,Kai Wang,Shaoxiang Li,Jingquan Liu
With the rapid consumption of traditional fossil energy, the utilization of solar energy via photothermal conversion to obtain fresh water from seawater or wastewater should be a promising alternative to solve the shortage of energy resources. At present, evaporators based on diverse photothermal conversion materials have been developed, but most of them are still facing the drawbacks of complicated structure, complex preparation and poor salt resistance, which severely affect their broad practical applications. Multilayer-MXene (mMXene) and polydopamine (PDA) nanoparticles are two kinds of materials with excellent photothermal conversion efficiency. In this study, we loaded these two materials with optimized mass ratio into the thermally insulated and low-cost melamine foam, followed by simple annealing treatment to afford three-dimensional and self-floating carbonized MXene/PDA foam (CMPF) evaporators with high hydrophilicity, unpleasant thermal conductivity, and remarkable light absorbance. The evaporation rate of CMPF, as a result, could attain 1.598 kg m −2 h −1 under 1 sun (1 kW m −2 ) irradiation while the photothermal conversion efficiency is calculated to be 89.8%. In addition, CMPF-2 displays excellent desalination ability, self-desalination ability, good cycle stability and reliable safety performance as revealed by bacterial culture experiment. Combining these advantages, it has been revealed that CMPF-2 possesses certain feasible practical applications in seawater desalination.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Tan Li,Wenbo Sun,Xianzhong Wang,Yan Li,Minggang Lin,Yangyi Chen,Chuyang Zhang,Huan Qi
Solar-powered desalination is considered a promising and sustainable method for producing clean water to alleviate freshwater shortages. However, most solar evaporators have drawbacks such as high costs, complicated processes and lack of durability. Here, we present solar evaporators modified with polyethyleneimine and gallic acid, decorated with carbon black nonwovens, for desalination to produce clean water. The carbon black photothermal nonwovens were produced by treating ES hot air nonwovens with a spray of carbon black solution. Utilizing the light-absorbing heat generation of carbon black and the skin-core structural characteristics of ES(PE/PET) nonwoven, the carbon black is firmly embedded in the PE skin layer of the nonwoven fabric. Subsequently, mussel chemistry inspired the formation of polyethyleneimine and gallic acid coatings on the surface of the carbon black-loaded nonwoven. By combining carbon black with mussel coatings, the photothermal nonwovens demonstrated improved hydrophilicity, excellent photothermal water evaporation performance, and enhanced light conversion efficiency. The modified interfacial evaporator exhibited a high evaporation rate of 1.22 kg m −2 ·h −1 and had high cost-effectiveness of 332.4 g·h −1 ·$ −1 . In addition, reusing, desalination, and outdoor experiments were conducted to showcase the potential of the evaporator for practical desalination. This work demonstrates the significant potential of photothermal ES nonwovens for efficient solar-driven clean water production to tackle global freshwater shortages.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Xuebin Lu,Zhengya Gong,Zhihao Yu,Jian Xiong,Gaixiu Yang,Mengyan Guo,Yuxin Zhang,Yiming Li
Supercapacitors as one of the new energy storage devices have attracted much attention from researchers. The design and preparation of new electrode materials with high conductivity and energy density has become a frontier and key issue in the research of supercapacitor performance improvement. In addition, flow capacitor deionization (FCDI) relying on the working principle of supercapacitors is a promising technology for desalination and has received crucial attention. NiCo 2 S 4 (NCS) is a promising pseudocapacitive material with high electrical conductivity and ideal stability. In this study, sea urchin-like NiCo 2 S 4 electrode materials (CC@NCS) grown in situ on crab shell carbon (CC) were prepared by a simple molten salt-assisted hydrothermal two-step method. The composite successfully combined the properties of CC and NiCo 2 S 4 . The prepared material exhibited excellent electrochemical properties and energy storage performance. In the three-electrode system, the specific capacitance is up to 692.4 F/g at a current density of 0.5 A/g. Asymmetric supercapacitors assembled with CC as the negative electrode, CC@NCS as the positive electrode, and 3 M KOH as the electrolyte obtained high specific capacitance (0.5 A/g, 163.6 F/g) and high energy density (305.16 W/kg, 8.18 Wh/kg). The device also showed excellent cycling performance in the long cycle test (88.65 % retention after 5000 cycles). In addition, the FCDI device with this material as the flow electrode achieved a final conductivity of 15.16 μS/cm by electrosorption of a 1000 mg/L NaCl solution at a constant pressure of 1.2 V for 60 min along with an impressive average salt removal rate (0.0621 mg/cm 2 ·min −1 ) and charge efficiency value (90.79 %), and a low energy consumption value (0.02 kWh/mol). What's more, it also exhibited excellent desalination properties. This indicates that the composite is a promising active material for energy storage and desalination.
研究领域:
材料科学
·
能源存储
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Zhaoshun Zhang,Hui Zhang,Qi Zhang,Yuanyuan Ye,Yulong Zheng,Xueqin Zuo,Qun Yang,Huaibao Tang,Shaowei Jin,Guang Li
Solar desalination has received great attention as an environmentally friendly and cost-effective way to desalinate seawater. In this paper, a melamine sponge composite polypyrrole (MSPPy) evaporator was prepared by in-situ polymerization of Pyrrole (Py) on a melamine sponge (MS). PPy has an efficient light absorption ability. The large aperture network structure of MS can realize multiple reflections of light and greatly increase the absorption of light. Their synergistic effect makes the light absorption efficiency of the MSPPy evaporator reach 96.97%. Under one sun, the average evaporation rate of 1.886 kg⋅m −2 ⋅h −1 and energy conversion efficiency of 96.8% were achieved during 10 h. Moreover, the evaporator has an edge-priority crystallization function, which enables it to work for a long time in a high-salt environment. It works continuously for 12 h in simulated seawater with a salinity of 20% without further accumulation of salt crystals on its surface. More important, it can rapidly diffuse accumulated salt into the bulk water at night. This study provides a new idea for the application of solar steam generation technology in high-salt 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
危险品化学品经营许可证（带存储）