CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xiu Dai,Xu Li,Xinlong Wang
In this work, the nanoparticles of zeolitic imidazolate framework-8 (ZIF-8) are incorporated into poly (lactic acid) (PLA) to prepare porous electrospun membranes. The morphology, mechanical property as well as the PM capture process and capacity of the membranes are studied using scanning electron microscopy (SEM), BET test, X-ray diffraction (XRD), tensile test, Fourier infrared spectra (FT-IR), UV–visible spectra, thermogravimetric analyses (TGA) and photoelectron spectroscope (XPS), systematically. The results demonstrate that the diameter and nanoscale porous structure of fibres can be successfully controlled by changing the content ZIF-8. The PLA/ZIF-8 membranes show better mechanical property compared with pure PLA membrane. The PM capture measurement demonstrates that the PLA/ZIF-8 porous membranes exhibit significantly enhanced PM2.5 removal efficiency compared to that of the pure PLA membrane. The prepared porous membranes also show low pressure drops and good recycling performance.
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
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Xiaotong Cao,Jianquan Luo,John M. Woodley,Yinhua Wan
Micropollutants present in water have many detrimental effects on the ecosystem. Membrane technology plays an important role in the removal of micropollutants, but there remain significant challenges such as concentration polarization, membrane fouling, and variable permeate quality. The work reported here uses a multifunctional membrane with rejection, adsorption, and catalysis functions to solve these problems. On the basis of mussel-inspired chemistry and biological membrane properties, a multifunctional membrane was prepared by applying “reverse filtration” of a laccase solution and subsequent “dopamine coating” on a nanofiltration (NF) membrane support, which was tested on bisphenol A (BPA) removal. Three NF membranes were chosen for the preparation of the multifunctional membranes on the basis of the membrane properties and enzyme immobilization efficiency. Compared with the pristine membrane, the multifunctional membrane exhibited significant improvement of BPA removal (78.21 ± 1.95%, 84.27 ± 7.30%, and 97.04 ± 0.33% for NT103, NF270, and NF90, respectively), all of which are clearly superior to the conventional Fenton treatment (55.0%) under similar conditions and comparable to soluble laccase coupled with NF270 membrane filtration (89.0%). The improvement would appear to be due to a combination of separation (reducing the enzymatic burden), adsorption (enriching the substrate concentration as well as prolonging the residence time), and lastly, catalysis (oxidizing the pollutants and breaking the “adsorption saturation limits”). Furthermore, the synergistic effect of the polydopamine (PDA) layer on the enzymatic oxidation of BPA was confirmed, which was due to its enhanced adsorption and electron transfer performance. The multifunctional membrane could be reused for at least seven cycles with an acceptable activity loss, demonstrating good potential for removal of micropollutants.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiahe Chen,Yingying Zhang,Xin Guo,Yiyang Qiao,Ping Yu
Artemisinin (Art) is the primary therapies for plasmodium falciparum malaria. However, it is very cumbersome to extract artemisinin from the plant Artemisia annua L. Herein, a novel defect-type UiO-66 structure was proposed, which can adsorb artemisinin through effective sites provided by ‘template molecules’. At the same time, the delayed phase inversion technology was used to prepare the loofah membrane to make the defect-type UiO-66 uniformly dispersed in the pores. In addition, the inside of the biomass loofah membrane had good mechanical properties and loofah membrane wrapped with polyacrylonitrile (PAN) can make Art solution evenly dispersed in each channel, greatly improving the utilization rate of defect-type UiO-66. The defect-type UiO-66 and the UiO-66-D@loofah membrane were characterized using various methods, including SEM, EDS, FT-IR, XRD, contact angle, and mechanical performance analyses. Compared with the static adsorption behavior of powder and loofah membrane, it was found that the adsorption performance presented an optimal adsorption capacity (56.548 mg g −1 ) at the flow rate of 5 mL min −1 , which was better than that of powder (27.096 mg g −1 ) as well as the static loofah membrane (33.127 mg g −1 ). The structural design of the membrane has provided a new solution for the extraction of Art from Artemisia annua L.
研究领域:
材料科学
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药物提取
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生物工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Zhiyan Ma,Xinhua Zhu,Yingru Huang,Yufeng He,Pengfei Song,Rongmin Wang
In order to prevent the spread of the epidemics caused by pathogenic microorganisms, it is very important to explore antimicrobial materials. In this paper, a novel antimicrobial polymer materials with dual active centers, iodine-povidone- co -thiazole nanoporous membrane (IPoTaNm), was successfully synthesized by one-pot emulsion polymerization followed by iodine complexation. The micromorphology and composition were characterized by scanning electron microscope (SEM), Fourier transform infrared spectra (FT-IR), dynamic light scattering (DLS), X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD) and contact angle test. Then, its antimicrobial performance was measured by using Escherichia coli and Staphylococcus aureus as test strains. It indicated that IPoTaNm exhibits excellent antibacterial activity, which the inhibition rate got to 99.9 % after 48 h. It also presented sustaining bactericidal activity, which the antimicrobial activity maintained 99.9 % even after >7 days. The synergistic antimicrobial mechanism of thiazole units (AcT) and iodine in IPoTaNm was discussed, and some facters for their inhibitory effects in the water column were investigated. In summary, the obtained IPoTaNm with dual active centers was an excellent candidate for minimizing bacteria-infection in different functional materials, which has potential applications in wastewater treatment to reduce bacterial infections.
研究领域:
材料科学
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生物学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2019
·Vol. 95
·期 3
·730-738
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IF 2.659
Yating Wang,Xu Li,Xiu Dai,Yixing Zhan,Xiaoqing Ding,Ming Wang,Xinglong Wang
BACKGROUND With the rapid industrial and urbanization development, a large amount of oily wastewater is generated from various sources. It is mutagenic and carcinogenic to human health and seriously affects the ecosystem. In this study PLA/ZIF-8@C600 nanofibers were prepared for oil adsorption. RESULTS Hybrid nanoparticles (ZIF-8@C600) of carbon black C600 and zeolitic imidazolate framework-8 (ZIF-8) with high specific surface area and porous structure were prepared by co-deposition and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FITR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and contact angle measurement. Biodegradable composite nanofiber membranes of poly(lactic acid) (PLA) and ZIF-8@C600 were manufactured by electrospinning. The SEM and contact angle results showed that the addition of ZIF-8@C600 could adjust the diameter, porosity, pore size and hydrophobicity of the composite electrospun nanofibers. The PLA/ZIF-8@C600 porous membranes had good oil sorption properties in oil–water mixture and emulsion. The oil adsorption capacity of the sample with 1 wt% ZIF-8@C600 was improved by ∼72.59% compared with that of pure PLA (13.5 g g −1 ), which demonstrated that the PLA/ZIF-8@C600 fibers were good candidates as oil sorbents. The adsorption kinetics of the membranes on paraffin liquid was in accordance with pseudo-second-order kinetics. CONCLUSION The addition of hybrid ZIF-8@C600 improved the hydrophobic properties and oil adsorption capacity of PLA/ZIF-8@C600 porous membranes. Because PLA is an environmentally friendly polymer, composite membranes based on it can avoid secondary pollution. Overall, these findings have good prospects for future treatment of oily wastewater. © 2019 Society of Chemical Industry
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yan Wang,Tao Yang,Jing Chen,Shaobin Wen,Die Li,Bingyu Wang,Qiang Zhang
A novel ferrocene-based nanofiltration membrane is prepared to combine filtration and photo-Fenton reaction for water treatment. Membranes containing ferrocene groups are successfully fabricated via an integration of layer-by-layer interfacial polymerization and ion exchange reaction. Rejection performance towards bisphenol S (BPS) increases with the growth of the interfacial polymerization layer, and the optimal membrane shows the highest rejection rate of 98.1%. For the optimal photo-Fenton system with H 2 O 2 , UV and ferrocene-based membrane (PS/HTCC-3/FcSO 3 ), the degradation rate of k is 0.092 min −1 , which is 1.8 times higher than that of the system with only H 2 O 2 and UV. Meanwhile, the salinity of BPS in the optimal system is 2 times higher than that of the system with H 2 O 2 and UV. After the heterogeneous photo-Fenton process, PS/HTCC-3/FcSO 3 can reject 65.6% of the BPS degradation by-products based on the variation of total organic carbon (TOC). In addition, quenching experiments prove that ·OH is the primary active radical, and the yield of ·OH in the optimal system is the highest compared with the system with H 2 O 2 and UV. The outstanding performance of ferrocene-based membrane demonstrates its potential for micropollutants treatment.
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
Engineering
·
2022
·
IF 12.834
Yanqiu Zhang,Fan Yang,Hongguang Sun,Yongping Bai,Songwei Li,Lu Shao
Although nanoporous membranes are of great interest in desalination, it is still challenging to construct highly permeable nanoporous membranes with excellent rejections for an efficient desalination process. In this work, highly permeable nanoporous membranes were built from renewable resources, assisted by the versatile functions of glucose and dopamine, with coupling reactive groups via interfacial reaction with 1,3,5-benzenetricarbonyl trichloride (TMC). The small molecules (0.66 nm) of glucose, which have high hydrophilicity, can diffuse into the membrane for an effective reaction to ensure structural integration. Our novel ultrathin (∼44 nm) nanofiltration (NF) membrane exhibits ultra-high Na 2 SO 4 flux and excellent rejection of Na 2 SO 4 (66.5 L∙m −2 ∙h −1 , 97.3%) and MgSO 4 (63.0 L∙m −2 ∙h −1 , 92.1%) under a pressure of 5 bar (1 bar = 10 5 Pa) which is much superior to the performance of natural-product NF membranes. The membrane demonstrates excellent long-term stability, as well as tremendous acid-base and alkali-base stability and high anti-pollution capacity. The designed membrane materials and architecture open a new door to biopolymer-based separation membranes beyond existing membrane materials.
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
Processes
·
2021
·Vol. 9
·期 6
·1049
·
IF 2.847
Jinbei Yang,Guangkai Dai,Jing Wang,Shuai Pan,Gang Lu,Xiaoke Shi,Danni Tang,Jinyi Chen,Xiaocheng Lin
Diffusion dialysis (DD) employing anion exchange membranes (AEMs) presents an attractive opportunity for acid recovery from acidic wastewater. However, challenges exist to make highly acid permeable AEMs due to their low acid dialysis coefficient (Uacid). Here, a series of porous and highly acid permeable AEMs fabricated based on chloromethyl polyethersulfone (CMPES) porous membrane substrate with crosslinking and quaternization treatments is reported. Such porous AEMs show highUacidbecause of the large free volume as well as the significantly reduced ion transport resistance relative to the dense AEMs. Compared with the commercial dense DF-120 AEM, our optimal porous AEM show simultaneous 466.7% higherUacidand 75.7% higher acid/salt separation factor (Sacid/salt) when applied to acid recovery at the same condition. Further, considering the simple and efficient fabrication process as well as the low cost, our membranes show great prospects for practical acid recovery from industrial acidic wastewater.Keywords:anion exchange membrane;diffusion dialysis;acid recovery;porous membrane
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
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
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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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Fan Wu,Rishun Li,Anfeng Yao,Zhixin Li,Huiqin An,Hui Ye,Qingping Xin,Yuzhong Zhang,Hong Li,Lizhi Zhao
Liquid-filled porous membranes have been developed for oil-water separation with antifouling properties. However, the degradation of fouling resistance and reduction of separation efficiency may occur due to the poor stability of the liquid layer. Prompted by the mesoporous structure and high porosity characteristics of aerogel , the membrane with aerogel-network-stabilized slippery surfaces was fabricated by in situ growth of silica aerogel coating on the polyethylene terephthalate (PET) fiber membrane and silicone oil filling. Owing to the oil-locking ability of the aerogel coating, the liquid layer of the membrane showed excellent stability against chemical corrosion and high-temperature, improved stability against shear and mechanical abrasion , and good hot water tolerance and self-healing performance. The prepared liquid-filled membrane can efficiently separate water-in-oil emulsion. In filtrating-cleaning cycles, the membrane showed antifouling property and durability with high separation efficiency and flux recovery. The membranes with highly stable liquid-filled surface provide promising prospects in industrial oil treatment and oil spill recovery.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 46
·2006544
·
IF 16.836
Junping Ju,Longyun Hao,Shiwen Yang,Dandan Wang,Yongzhi Zhang,Hua Yuan,Xianze Yin,Yeqiang Tan
Advanced medical dressings need to meet these requirements of breathability, moisture absorption balance, antibacterial activity, and mechanical strength. Both breathability and moisture absorption balance strongly depend on the porous structure that inversely sacrifice their mechanical properties and bulk antibacterial activity. Herein, multifunctional porous structure is designed that can synchronously realize excellent antibacterial activity, breathability, superhydrophilicity, and enhanced mechanical properties just using nanofluids templating. The pore sizes, density, and functionality of porous polymers are regulated through nanofluids loading and multiple functional components including inorganic nanoparticles core and organic corona/canopy composed of organic long chains with different charges. An ionically tethered, nonylphenol polyoxyethylene ether sulfate as a canopy of nanofluids can be removed with sodium chloride solution to form porous structure, greatly improving the breathability of membrane and achieving superhydrophilicity to obtain moisture absorption balance. Meantime, exposed polysiloxane quaternary ammonium salts as covalently bonded corona of nanofluids exhibit excellent antibacterial activity. Finally, nanoparticles core endows supreme tensile strength ratio (115%) of porous membrane. Overall, nanofluids templating approach is expected to develop into a universal strategy to construct a series of multifunctional porous polymer materials via varying the component of nanofluids, which provide a promising application in biomedicine, human health, and life science.
研究领域:
材料科学
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生物医学工程
·
生命科学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-11
·
IF 3.8
Yang Jianlin,Yang Xin,Yu Tianlu,Wang Zhecun
Liquid separation methods are widely used in industrial and everyday applications, however, their applicability is often constrained by low efficiency, membrane fouling, and poor energy efficiency. Herein, a conceptually novel liquid-infused interfacial floatable porous membrane (LIIFPM) system for high-performance oil/water separation is proposed. The system functions by allowing a liquid to wet and fill a superamphiphilic porous membrane, thereby creating a stable liquid-infused interface that floats at the oil/water interface and prevents the passage of immiscible liquids. The lower-layer liquid can outflow directly, while the flow of the upper-layer liquid is stopped by the membrane. Remarkably, the efficiency of the LIIFPM system is independent of the membrane pore size, enabling ultrafast immiscible oil/water separation in an energy-saving and antifouling manner.
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
危险品化学品经营许可证（带存储）