JOURNAL OF MEMBRANE SCIENCE
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2021
·
IF 8.742
Baochun Meng,Guozhen Liu,Yangyang Mao,Feng Liang,Gongping Liu,Wanqin Jin
Two-dimensional (2D) materials have been demonstrated as promising building blocks of designing high-performance membranes for molecular separation. Nevertheless, it is a big challenge to apply 2D-material membranes for water desalination . Herein, we proposed a new type of surface-charged MXene (SC-MXene) membrane for water desalination, which was facilely fabricated by laminar stacking of MXene nanosheets and subsequent surface-coating with polyelectrolyte layer. The morphology, physicochemical structure and surface property of the MXene materials and resulted membranes were observed by XPS , SEM, water contact angle test , AFM , IR and XPS . These results demonstrated that coating polyelectrolyte (PEI) successfully tuned the surface charge and enhanced the hydrophilicity without scarifying the laminar structure of MXene membrane. By utilizing the effects of electrostatic interaction and size-sieving, the resulting surface-charged MXene (SC-MXene) membrane exhibited high salt rejection and water permeance during either nanofiltration or forward osmosis process, showing great potential for water desalination.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Yangyang Mao,Jingyi Xu,Huimin Chen,Guozhen Liu,Zhengkun Liu,Long Cheng,Yanan Guo,Gongping Liu,Wanqin Jin
As a new generation of high-performance alternative, graphene-based membranes have shown great prospect in water purification . Among them, numerous efforts are concentrated on designing hydrophilic membranes while less attention is paid to hydrophobic membranes, which limit the potential application of graphene-based membranes, such as desalination via membrane distillation (MD) process. Anisotropic heat transfer and easy hydrophobic modification of graphene oxide (GO) make it suitable for MD membrane fabrication. Herein, we developed a novel porous and hydrophobic MOF-801@GO-PDMS membrane with enhanced water vapor transport for water desalination via direct contact membrane distillation (DCMD). MOF-801 nanoparticles were in-situ grown within GO interlayer followed with vacuum filtration to fabricate MOF-801@GO membrane which was subsequently modified with polydimethylsiloxane (PDMS) to fabricate the MOF-801@GO-PDMS membrane. The water-stable porous MOF-801 nanoparticle was introduced to increase the porosity of GO laminate and provide extra water vapor transport channels. PDMS was employed to ensure the membrane hydrophobic stability by utilizing its intrinsic hydrophobicity and segment entanglement. The optimum MOF-801@GO membrane exhibited water flux of 29.24 kg m −2 h −1 and NaCl rejection of over 99.99%, as well as robust stability during continuous DCMD desalination test. This work not only gives a promising candidate for water desalination, but also provides a method to design hydrophobic and porous graphene-based nanostructures for other potential applications.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Peilei Zhou,Kaijie Yang,Li Liu,Qianqian Liu,Naizhong Zhang,Jia Xu
Solar-driven interfacial evaporation presents significant potential for seawater desalination and wastewater purification. However, prolonged operation in marine environments often results in salt accumulation, which adversely impacts the performance and lifetime of system. Despite the progress in material design, achieving efficient evaporation while mitigating salt crystallization remains challenging in high-salinity water. In this study, we synthesized a hierarchically structured C 18 H 37 -MXene/PA/MS evaporator employing a simple yet effective methodology specifically designed for applications in high-salinity water environments. The evaporator features a dual-region configuration, with an upper hydrophobic light-absorbing layer comprising modified MXene and polyamide (PA) membranes and a hydrophilic lower layer consists of hydrophilic melamine sponge (MS). This innovative design, incorporating an ultra-thin polyamide interlayer, significantly enhances interfacial stability, thereby mitigating the interfacial separation typically observed in conventional Janus materials during prolonged usage. Furthermore, the meticulous control over the thickness of the hydrophobic layer (5.54 μm) ensures optimal thermal insulation properties of the material. Consequently, the C 18 H 37 -MXene/PA/MS evaporator demonstrates an impressive evaporation rate of 1.49 kg m −2 h −1 under 1 sun illumination, with a high energy efficiency of 92.8 %. Furthermore, the Janus architecture ensures steady performance in high salinity conditions, sustaining a high evaporation rate of 1.46 kg m −2 h −1 even in a 20 wt% NaCl solution. Furthermore, under natural sunlight, the daily freshwater yield reaches 8.91 kg m −2 . The exceptional evaporation efficiency and robust salt resistance highlight its strong potential for water desalination and wastewater treatment, contributing to the advancement of sustainable water resource management.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Haotian Li,Mao Fu,Shi-Qiang Wang,Xiangyong Zheng,Min Zhao,Fenglin Yang,Chuyang Y. Tang,Yingchao Dong
Treatment of hypersaline waters is a critical environmental challenge. Pervaporation (PV) desalination is a promising technique to address this challenge, but current PV membranes still suffer from challenging issues such as low flux and insufficient stability. Herein, we propose in situ nanoseeding followed by a secondary growth strategy to fabricate a high-quality stable metal–organic framework (MOF) thin membrane (UiO-66) for high-performance pervaporation desalination of hypersaline waters. To address the issue of membrane quality, a TiO2 nano-interlayer was introduced on coarse mullite substrates to favor the growth of a UiO-66 nanoseed layer, on which a well-intergrown UiO-66 selective membrane layer with thickness as low as 1 μm was finally produced via subsequent secondary growth. The PV separation performance for hypersaline waters was systematically investigated at different salt concentrations, feed temperatures, and long-term operation in different extreme chemical environments. Besides having nearly complete rejection (99.9%), the UiO-66 membrane exhibited high flux (37.4 L·m–2·h–1) for hypersaline waters, outperforming current existing zeolite and MOF membranes. The membrane also demonstrated superior long-term operational stability under various harsh environments (hypersaline, hot, and acidic/alkaline feed water) and mild fouling behavior. The rational design proposed in this study is not only applicable for the development of a high-quality UiO-66 membrane enabling harsh hypersaline water treatment but can also be potentially extended to other next-generation nanoporous MOF membranes for more environmental applications.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Chenxi Han,Youquan Li,Yibing Chen,Jin Zhang,Zijun Zhang,Yuqiu Ke,Jun Xiong,Linghui Yu,Ming Li
Interfacial solar desalination generation (ISDG) presents a promising solution for obtaining freshwater from seawater. However, developing solar evaporators with robust salt resistance using simple methods to ensure consistent desalination performance remains a major challenge. In this study, we engineered a solar evaporator (CuS-PDA-PVAF) by modifying polyvinyl alcohol foam (PVAF) with polydopamine (PDA) and CuS using a straightforward solution immersion method. The incorporation of PDA and CuS enhances the sunlight absorption capability of PVAF to approximately 98 %, resulting in an evaporation rate of 1.44 kg m –2 h –1 under 1-solar intensity. The CuS-PDA-PVAF solar evaporator leverages the macroporous structure and excellent hydrophilicity, enabling it to withstand 15 wt% saltwater while maintaining a steady evaporation rate of about 1.17 kg m –2 h –1 . Outdoor tests confirm that a 1 m 2 CuS-PDA-PVAF can generate approximately 5.6 kg of freshwater daily. This solar evaporator, designed simply and resistant to salt, possesses substantial potential for alleviating freshwater scarcity.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 30
·14479-14489
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IF 3.925
Jiayu Yan,Zhen Zhang,Yongxin Shi,Qinglai Che,Qing Miao,Guihua Meng,Zhiyong Liu
Solar evaporation generation is a promising method for purifying high salinity water using renewable solar energy. However, the design for the efficient antifouling solar-thermal water evaporation of low-cost systems remains a challenge. Here, a simple, anti-oil-fouling and macroporous aerogel based on polyvinyl alcohol (PVA), sodium alginate (SA), and polyaniline (PANi) was prepared by an in situ polymerization and freeze-drying technique. Solar water evaporation experiments were performed on the aerogel under one-sun illumination. Because of the synergistic effects of the abundant macroporous structure, roughness of the surface, and hydrophilic polymeric matrix, the aerogel displayed high solar absorption, and superhydrophilic and underwater superoleophobic surface properties. As a result, under one-sun illumination, the aerogel had a maximum solar-thermal efficiency of 91.5% and an evaporation rate of 1.46 kg m−2 h−1. More importantly, the aerogel exhibited almost identical evaporation performance in oily wastewater and saline alkali water. After 25 cycles, the photothermal conversion efficiency was found to be 87% and the aerogel was still resistant to oil contamination. The high solar vapor generation rate and antifouling functionality make the macroporous aerogel a promising material for solar-thermal water desalination, even in oil-contaminated water.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Petroleum Science
·
2018
·Vol. 15
·期 1
·146-156
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IF 1.624
Zhang Rui,Xu Xiaoying,Cao Bing,Li Pei
The pyromellitic dianhydride (PMDA) crosslinked poly(vinyl alcohol) (PVA) was coated on top of the PAN ultrafiltration membrane to form a PVA/PAN composite PV membranes for wastewater desalination. The composite membranes have high application value in industrial wastewater treatment. By varying the membrane fabrication parameters including the weight percent (wt%) of the PMDA, the crosslink temperature and duration, membrane with the best desalination performance was obtained. The composite membrane with a 2-μm-thick PVA selective layer containing 20 wt% of PMDA and being crosslinked at 100 °C for 2 h showed the highest NaCl rejection of 99.98% with a water flux of 32.26 L/(m 2 h) at 70 °C using the 35,000 ppm NaCl aqueous solution as feed. FTIR spectroscopy, wide-angle X-ray diffraction, thermogravimetric analysis and scanning electron microscope have been used to characterize the structures and properties of both the crosslinked PVA dense films and PVA/PAN composite membranes. The effects of the concentrations of PMDA, the crosslinking time and temperature to the membrane water contact angle, swelling degree, salt rejection and water flux were systematically studied.
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
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Zihan Liu,Junwen Ding,Shirong Li,Longfeng Hu,Heng Liang,Langming Bai
Desalination of textile wastewater is an effective measure to reduce environmental pollution and realize resource reuse. Graphene oxide (GO) membrane is regarded as one of the first choices for textile wastewater desalination due to its chemical resistance, strong mechanical properties, and adjustable interlayer channels. Here, we propose a polyaniline (PANI) particle incorporation strategy and use the dedoping effect of polyaniline to provide an additional permeation pathway through one-step alkali treatment to accelerate water molecule transport. Polyaniline (PANI) doped with polystyrene sulfonic acid (PSS) nanoparticles were synthesized and incorporated into GO membranes, followed by crosslinking of glutaraldehyde (GA) for stability and alkali treatment for more porosity generation. The as-prepared BGO/PANI-PSS membrane with 30% PANI-PSS addition displayed a flux of 70.4 LMH/bar, 99.3%, and 4.8% rejection for Congo red and NaCl, respectively, exhibiting 5.9 times higher permeability than that of GO membrane with similar dye rejection. This work provides a facile strategy for designing GO composite membranes for dye/salt separation.
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
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Lvji Yan,Haoyu Deng,Sikpaam Issaka Alhassan,Haiying Gang,Bichao Wu,Dun Wei,Yiyun Cao,Peng Chen,Haiying Wang
Bismuth-based materials as an efficient Cl - storage electrode in capacitive deionization (CDI) technology possess a high affinity for chloride ions. However, their performance is significantly limited owing to the frequent volume expansion of bismuth (Bi) nanoparticles during the electro-sorption process. Herein, a facile synthesis strategy of a self-coated bismuth-carbon composite (BiAC@C) was fabricated through one-step carbonization of commercial bismuth acetate. The yolk-shell nanostructure-like BiAC@C uniformly sandwiched the Bi nanoparticles in the porous carbon framework, which not only provided a reinforcing “carbon skeleton” for constraining Bi nanoparticles in spatial, but also facilitated the ions diffusion and better electronic conductivity, supplying an superior Cl - removal with enhanced ability for water desalination . Results show that a superior Cl - removal capacity of the synthesized BiAC@C composite electrodes was ∼109.63 mg g −1 at 20 mA g −1 , substantially higher than that of the most Cl - capturing electrodes recently reported. Moreover, such a capacity could keep a durability that still retains 80.53 % of its initial capacity after 50 continuous treatment cycles under current density of 30 mA g −1 , and it is much higher than 29.11 % of the pure Bi electrode. It is expected that the prepared BiAC@C composite could be a promising alternative material for the extraction of Cl - from wastewater.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jiao Chen,Kuichang Zuo,Bing Li,Jiahui Hu,Wenbao Liu,Dongsheng Xia,Lin Lin,Jiajin Liang,Xiao-yan Li
Capacitive deionization (CDI) is an emerging technology for water desalination, especially low-salinity water. Freestanding porous carbon-based electrodes with rapid electron transfer rate and effective ion diffusion features are desired to achieve high desalination performance. Here, a porous carbon pad derived from the fungal hyphae of Aspergillus niger was prepared as a precursor of the electrode. After carbonization and activation, the intertwined and hierarchical porous structure of the fungal hypha pad was well-preserved, producing a freestanding fungal hypha activated carbon pad (FhACPad) electrode for MCDI. The interconnected carbon fibers and open pore structure of the FhACPad yielded an electrode with high electrical conductivity and rapid ion transport properties. The novel FhACPad exhibited a gravimetric salt adsorption capacity of 35.6 ± 2.3 mg NaCl /g with an average desalination rate of 1.2 mg NaCl /g electrode /min from a 585 mg/L NaCl aqueous solution at a cell voltage of 1.2 V and a flow rate of 1 mL/min. As a result, the FhACPad outperformed conventional powdered activated carbon (PAC) electrodes and the most recently reported porous carbon electrodes under similar desalination conditions. This work also provides insights into the structure-performance relationships of CDI electrodes and shows a great potential of fungal biomass-derived porous carbon electrodes for high-performance MCDI applications.
研究领域:
环境科学
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材料科学
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生物学
✓ 已验证
DOI
高影响因子
Environmental Science-Nano
·
2018
·Vol. 5
·期 10
·2337-2345
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IF 6.087
Jinlong Han,Liyi Shi,Tingting Yan,Jianping Zhang,Dengsong Zhang
In recent years, increasing attention has been paid to capacitive deionization (CDI) and significant developments have been made as a result of the high efficiency and relatively low cost of this technique. While carbon materials have been regarded as promising CDI electrodes, their high hydrophobicity and low accessible surface area hinder further enhancement of salt adsorption capacity. To overcome this issue, we prepared herein highly hydrophilic N, P co-doped 3D hierarchical carbon architectures derived from graphene oxide, gallic acid, phytic acid (P source), and chitosan (N source) by an ingenious technique. Highly efficient removal of ions from saline water using N, P co-doped 3D hierarchical carbon architectures via capacitive deionization has been demonstrated for the first time. The N, P co-doped 3D hierarchical carbon architectures delivered very high specific adsorption capacities (up to 26.8 mg g−1 at 1.2 V). The electrochemical performance remained nearly unchanged after 10 000 consecutive galvanostatic charge–discharge cycles, revealing good deionization stability and reusability. We believe that this work is of great significance to expand the access to freshwater resources in water-scarce regions.
研究领域:
材料科学
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环境工程
·
水资源管理
✓ 已验证
产品关联
DOI
高影响因子
Green Energy & Environment
·
2025
·
IF 14.6
Jiao Chen,Kuichang Zuo,Jiajin Liang,Gang Wang,Lin Lin,Xiao-yan Li
High-performance electrode materials are critical for the development of the capacitive deionization (CDI) technology for efficient water desalination. In this study, binder-free porous carbon electrodes were successfully prepared from the fungal hyphae sheet with the formation and growth of metal-organic framework (MOF) crystals on the surface of hyphal fibers. The continuous fungal fibrous structure with abundant surface functional groups provided an ideal supporting substrate for in-situ oriented MOF growth. The MOF-fungal hyphae derived carbon (MOF-Fhy-C) exhibited an excellent property for CDI application, such as a large accessible surface area, excellent electrical conductivity, high porosity and hydrophilicity. The MOF-Fhy-C electrode achieved an outstanding CDI performance with a salt adsorption capacity of 40.8 mg/g and an average salt adsorption rate of 1.4 mg/(g·min) for treating 10 mmol/L NaCl solution at a cell voltage of 1.2 V, which are considerably higher than most of carbon-based electrodes reported in the literature. This research presents an effective strategy for fabricating freestanding CDI electrodes from fungal materials with MOF for high-performance desalination.
研究领域:
环境科学
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材料科学
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化学工程
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水资源处理
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纳米材料
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能源与环境技术
✓ 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）