NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 11
·4950-4962
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IF 3.591
Chengcong Wang,Lijuan Zhang,Haikuan Yuan,Yujia Fu,Zheng Zeng,Jie Lu
In this study, perfluorosulfonic acid (PFSA) was firstly grafted on multi-walled carbon nanotubes (MWCNTs) to obtain PFSA-g-MWCNT nanocomposites. The combination of MWCNTs with PFSA effectively prevents the interactions among them, so that the dispersion of PFSA-g-MWCNTs in N,N-dimethylacetamide (DMAc) was greatly improved. Then, polyethersulfone (PES)/PFSA-g-MWCNT ultrafiltration (UF) membranes were prepared via a non-solvent induced phase separation (NIPS) method using different contents of PFSA-g-MWCNT nanocomposites as additives. The nanocomposites and membranes were characterized using techniques including Fourier-transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy (SEM). The SEM images show that the PFSA-g-MWCNTs no longer agglomerate and entangle, and exist as individual nanotubes in the PES/PFSA-g-MWCNT membrane. The mechanical and thermal properties of the composite membranes were enhanced with the increasing PFSA-g-MWCNT nanocomposite content. The performance of the UF membrane was evaluated using bovine serum albumin (BSA) as a model system. The results show that the permeation and antifouling performances of the PES/PFSA-g-MWCNT membranes were enhanced. For example, the pure water flux, BSA rejection and pure water flux recovery rate of the PES (M0) membrane were 80.49 L m−2 h−1, 86.29%, and 70.96%, respectively, while for the PES/PFSA-g-MWCNT (M6) membrane, they were 447.83 L m−2 h−1, 87.47%, and 92.10%, respectively. Long-term stability experiments show that the PES/PFSA-g-MWCNT membrane still maintains a high pure water flux.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2017
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IF 4.233
Xiaofeng Fang,Jiansheng Li,Xin Li,Shunlong Pan,Xiuyun Sun,Jinyou Shen,Weiqing Han,Lianjun Wang,Bart Van der Bruggen
In this work, an iron-tannin-framework (ITF) complex was introduced to a poly (ether sulfone) (PES) casting solution as a hydrophilic additive to fabricate ITF/PES ultrafiltration (UF) membranes via non-solvent-induced phase separation (NIPS). The structure and performance of the PES membranes with ITF concentrations ranging from 0 to 0.9 wt.% were systematically investigated by scanning electron microscopy, water contact angle, permeability, protein rejection and fouling resistance measurements. The results indicate that the pore structure and surface properties of PES UF membranes can be regulated by incorporating the ITF complex. Compared with classical PES membranes, ITF/PES membranes were found to have an increased hydrophilicity and porosity and reduced surface pore size. Importantly, a simultaneous enhancement of permeability and separation performance was observed for the blend membranes, which indicates that the introduction of the ITF complex can break through the trade-off between permeability and selectivity of UF membranes. When the ITF content was 0.3 wt.%, the permeability reached a maximum of 319.4 (L/m 2 h) at 0.1 MPa, which is 1.6 times higher than that of the classical PES membrane. Furthermore, the BSA rejection increased from 25.9% for the PES membrane to 95.9% for the enhanced membrane. In addition, the same membrane showed an improved fouling resistance (higher flux recovery and lower adhesion force) and stable hydrophilicity (unchanged after incubation in deionized water for 30 days). The simple, green and cost-effective preparation process and the outstanding filtration performance highlight the potential of ITF/PES membranes for practical applications.
研究领域:
材料科学
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环境工程
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膜技术
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产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Denghui Zhu,Tong Xu,Chengcai Li,Dan Xu,Guojin Liu,Hailin Zhu,Yuhai Guo
Photo-Fenton membranes exhibit exceptional self-cleaning and anti-fouling performances, making them promising for oil/water separation applications. However, the practical use of photo-Fenton catalytic reaction is limited as it requires an acidic environment. In this study, a polyethersulfone (PES)/Fe 3 S 4 @Al 2 O 3 membrane was fabricated using nonsolvent-induced phase separation. This resulted in a photo-Fenton separation membrane with a broad pH range applicability, leveraging the high catalytic activity of Fe 3 S 4 and the unique Lewis acid properties of Al 2 O 3 . The findings indicate that the optimized membranes can achieve a separation efficiency of over 99.3 % for various oil/water emulsions. The membrane demonstrates exceptional self-cleaning performance and stability, maintaining a separation efficiency of over 99 % even after 10 cycles of oil/water emulsion separation. Additionally, the membrane exhibited a catalytic degradation efficiency of 100 % for MB, RhB and MO under visible light in pH range of 2–12. The high separation efficiency, stability, self-cleaning performance, and wide pH range of these membranes make them promising candidates for long-term oily wastewater purification.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Membranes
·
2023
·Vol. 13
·期 2
·241
·
IF 4.2
Haiyan Wu,Ling Wang,Wentao Xu,Zehai Xu,Guoliang Zhang
Serious membrane fouling has limited the development of ultrafiltration membrane technology for water purification. Synthesis of an ultrafiltration membrane with prominent anti-fouling ability is of vital importance. In this study, CAB−GO composite nanosheets were prepared by grafting graphene oxide (GO) with a zwitterionic material cocamidopropyl betaine (CAB) with strong antifouling properties. Anti-fouling CAB−GO/PES mixed matrix ultrafiltration membrane (CGM) was prepared by the phase inversion method with polyethersulfone (PES). Due to its electrostatic interaction, the interlayer distance between CAB−GO nanosheets was increased, and the dispersibility of GO was improved to large extent, thereby effectively avoiding the phenomenon of GO agglomeration in organic solvents. Based on the improvement of the surface porosity and surface hydrophilicity of the CAB−GO/PES mixed matrix membrane, the pure water flux of CGM−1.0 can reach 461 L/(m2·h), which was 2.5 times higher than that of the original PES membrane, and the rejection rates toward BSA and HA were above 96%. Moreover, when the content of CAB−GO was 0.1 wt%, the prepared CAB−GO/PES membrane exhibited very high BSA (99.1%) and HA (98.1%) rejection during long-term operation, indicating excellent anti-fouling ability.Keywords:antifouling;zwitterionic polymer;polyethersulfone (PES);graphene oxide (GO);mixed matrix ultrafiltration membrane
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
JOURNAL OF MEMBRANE SCIENCE
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2020
·
IF 7.183
Ruoxi Wang,Xueting Zhao,Youyou Lan,Lifen Liu,Congjie Gao
Superhydrophilic and underwater superoleophobic membranes have recently attracted increased attention in oily wastewater treatment because of their potential to promote membrane permeability and minimize membrane fouling . Despite recent advances, the manipulation of membrane superwettability is usually achieved by coating functional layers on commercial hydrophobic porous substrates. The direct fabrication of superhydrophilic and underwater superoleophobic microporous membranes still remains a challenge. In this work, we provide a new in situ metal-polyphenol interfacial assembly strategy and prepare a new type of superwetting PES/SPES/MPN membranes. In the phase inversion of membrane formation, the coordination assembly of tannic acid (TA) and transition metal ions takes place alone with the solvent/nonsolvent exchange, resulting in the in situ deposition of metal-polyphenol networks (MPNs) on as-prepared polyether sulfone (PES)/sulfonated polyether sulfone (SPES) membranes. The PES/SPES/MPN membranes exhibit hierarchical surfaces and bi-continuous pores, and the in situ deposited MPNs provide hydrophilic bases. Among them, the PES/SPES/TA-Fe 3+ membrane showed the highest superhydrophilicity and underwater superoleophobicity. Thanks to the excellent superhydrophilicity, the water flux of PES/SPES/TA-Fe 3+ membrane can reach 4423 Lm −2 h −1 . Moreover, the PES/SPES/TA-Fe 3+ membrane exhibits high-performance for oil-in-water emulsion separation with high flux (>1500 Lm −2 h −1 ), excellent oil rejection (>99.5%) and reliable enhanced antifouling and recycling performance. This study provides a novel and facile strategy for the direct fabrication of superwetting microporous membranes, and predicts the potential application of PES/SPES/MPN membranes in oily wastewater treatment.
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
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Jinyang Liu,Qiqi Liao,Chengcai Li,Xueliang Jiang,Jiuming Li,Wangyong Jin,Guojin Liu,Yuhai Guo,Bin Yu,Hailin Zhu
Being a low-energy, reusable, and environmentally friendly degradation technology, photocatalysis has excellent application prospects in textile dye wastewater degradation. In this study, we combine the advantages of photocatalysis and membrane technology to prepare photocatalytic membranes that immobilize the photocatalyst and alleviate membrane pollution. Dual-precursor graphitic carbon nitride (U6M1) was composited with Bi 12 TiO 20 (BTO) using the annealing method to prepare a novel Δ(Z + II)-type BTO/U6M1 photocatalyst with visible-light response capacity. Subsequently, BTO/U6M1/PES composite photocatalytic membranes were fabricated using the nonsolvent-induced phase separation (NIPS) method, and the photodegradation activity of the composite membranes was executed against rhodamine B (RhB) dye. The results indicated that the composite membrane exhibiting the best photocatalytic performance achieved nearly 100 % degradation of RhB within 120 min. Furthermore, the membrane with optimal photocatalytic performance retained photocatalytic activity for five consecutive dye degradation tests, demonstrating its reusability.
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
DESALINATION
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2022
·
IF 11.211
Yu-yu Yao,Ting Wang,Li-guang Wu,Hua-li Chen
To improve the flux, anti-fouling and dye separation performance of PES-based membranes, PES mixed-matrix membranes (MMMs) blended with ZIF-8@Ti 3 C 2 T x composites were fabricated via a facile one-pot microemulsion strategy. The introduction of hydrophilic components in the microemulsion into the PES matrix enhanced the pore structures and surface polarity of the resulting MMMs, causing them to exhibit high permeation and anti-fouling performance compared to both neat PES and MMMs with ZIF-8. The optimal membrane flux and anti-fouling performance were found to be 280 L·m −2 ·h −1 and 91 % (bovine serum albumin rejection), respectively, at 3 % microemulsion content. The well-distributed ZIF-8@Ti 3 C 2 T x composites in the MMMs interact with dye molecules, which strengthens the dye retention from high-salinity wastewater. Further, the pore size of the MMMs was positively correlated with the flux but negatively correlated with dye retention. In particular, the M-3 membrane exhibited high flux (140 L·m −2 ·h −1 ) and up to 98 % dye rejection in high-salinity wastewater, but its rejection of salt ions was <5 %. In addition, the dye rejection recovery rate of M-3 after each washing exceeded 93 % over 5 fouling/backwashing cycles. These results strongly suggest that MMMs incorporated with ZIF-8@Ti 3 C 2 T x composites have promising application prospects for removing trace dye pollutants from high-salinity wastewater.
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
CRYSTENGCOMM
·
2023
·Vol. 25
·期 7
·1076-1089
·
IF 3.1
Aheyelikai Yeerken,Jiangli Lin,Xiaotian Wang,Yulu Luo,Hongying Ma
Triphenylmethane dyes not only can be utilized to dye silk, leather, and paper, but they also play an important part in treating parasitic, fungal, and bacterial infections of fish and fish eggs. Although these dyes are inexpensive and have a wide range of applications, they are poisonous. Therefore, their removal from wastewater is crucial for water purification. Metal–organic (MOF)/polymer porous composites were prepared by compounding highly porous MOFs with organic polymers with good stability and hydrophilicity to realize the highly efficient and stable adsorption of triphenylmethane dyes in wastewater over multiple cycles. Porous ZIF-67/PES composite microspheres for the adsorption of triphenylmethane dyes were successfully synthesized via in situ growth, and their adsorption conditions were optimized on the basis of time, pH and NaCl concentrations to investigate their adsorption performance. The as-synthesized porous ZIF-67/PES composite microspheres were characterized by using scanning electron microscopy, X-ray diffractometry, and Fourier transform infrared spectroscopy. Their adsorption kinetics and mechanisms were also studied. Their reusability and stability after cyclic adsorption processes were also investigated. The maximum adsorption capacity of the porous ZIF-67/PES composite microspheres for MG, FA and CV was 5743.28 mg g−1, 2176.52 mg g−1, and 122.78 mg g−1, respectively. Therefore, porous ZIF-67/PES composite microspheres are a potential and efficient absorbent for triarylmethane dye removal.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
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IF 7.312
Han Feng,Jun Liu,Yongfeng Mu,Nan Lu,Shuling Zhang,Mei Zhang,Jiashuang Luan,Guibin Wang
Metal organic frameworks (MOFs) have raised considerable interest because of their favorable impacts on the performance of water treatment membranes. Herein, the novel nanocomposite based on both nanoporous MOFs and hydrophilic carbon quantum dots (CQDs) was exploited as a novel dopant for the fabrication of PES ultrafiltration (UF) membranes. CQDs were synthesized via pyrolysis of citric acid, and UiO-66-NH 2 @CQDs were synthesized via the condensation reactions of CQDs and UiO-66-NH 2 using EDC and NHS as the condensating agents. The properties of resulting membranes on the porosity, membrane morphology, hydrophilicity, permeability and anti-fouling performance were adequately investigated. The membranes incorporated with UiO-66-NH 2 @CQDs exhibited significantly improved water flux (up to 358.5 Lm −2 h −1 ), which was ~1.82 times that of pristine PES membrane. Additionally, the BSA rejections rates for the hybrid membranes were all maintained above 95.0%. Furthermore, the hybrid membranes exhibited enhanced anti-fouling performance and the highest flux recovery ratio ( FRR ) of the hybrid membrane with 0.5% UiO-66-NH 2 @CQDs reached 77.6%. The membranes incorporated with UiO-66-NH 2 @CQDs exhibited better permeability and anti-fouling performance than those incorporated with CQDs or UiO-66-NH 2 . This work reveals that the novel hydrophilic nanofillers combining CQDs and MOFs exhibit great potential for application in water treatment membranes.
研究领域:
材料科学
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环境工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jia Wang,Xuan Zhao,Hongqiang Qu,Jianzhong Xu,Jing Ma
The property of the substrate takes a critical role in the separation performance of the thin-film composite (TFC) membrane. While, regulating the properties of the substrate by introducing metal–organic framework with tunable shapes for optimal TFC membrane has not been studied in-depth. In this work, a rationally regulated polyethersulfone substrate was designed by embedding ZIF-8 with three different shapes (spherical, hollow tube and flowerlike). Then, the TFC membranes were obtained by synthesising polyamide layer on the modified substrates. The results show that the modified substrates have positive effect on the water treatment performance, which was highly related to the addition amount and shapes of ZIF-8. Specifically, the hollow tube ZIF-8 modified TFC membrane exhibits the best water permeance of 2.22 L m -2 h −1 bar −1 (LMH bar −1 ) and excellent rejections (94.2 %, 99.7 %, 99.8 %, 99.9 % for NaCl, AO, MO and DR, respectively), which mainly derived from the increased channels and surface roughness. The findings provide a comprehensive insight of the shape-controlled substrate in the separation performance of the TFC membranes.
研究领域:
材料科学
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化学工程
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2016
·
IF 2.75
Chen-Hao Ji,Shuang-Mei Xue,Zhen-Liang Xu,Xiao-Hua Ma
In this work, a novel hollow fiber catalytic packing (HFCP) was fabricated of ZrO 2 (shell)/TiO 2 (core) (TZ) solid superacid nanoparticles , perfluorinated sulfonic acid resin (PFSA) and polyethersulfone (PES) via wet-spinning method. TZ was a homemade binary solid superacid nanoparticles with core–shell structure using superfine titania (5 nm) as the core and mesoporous tetragonal phase zirconia as the shell. It was synthesized through the hydrolysis of zirconium oxychloride in the presence of titania nanoparticles and cetyltrimethylammonium bromide (CTAB) hexagonal crystals covered on the titania core and followed by calcination and acidification. HFCPs demonstrated well catalytic performance in the esterification test of ethanol and acetic acid due to the superacid sites on the surface of TZ and PFSA polymer chain. And the superacid sites on the PFSA polymer chain could be sufficiently exposed by the embedding of the nanoparticles. At the same time, HFCPs also showed ultrahigh recovery which was more than 99.5% in 6 runs because of the well integrality benefited from the wet-spinning method. The specific surface area (SSA) and pore size distribution were analyzed by N 2 adsorption–desorption, the result showed that the SSA of HFCPs decreased with the increasing of the PFSA additive amount. The SSA of the HFCP with the best catalytic performance could be up to 90.60 m 2 /g, in which the PFSA weight proportion was 13%. The XRD pattern and HRTEM image showed the HFCPs i.e. the zirconia shell of TZ formed uniform tetragonal phase. Other characterizations such as FT-IR, XPS, SEM and TEM were utilized to determine the chemical composition and morphology of the HFCPs and TZ, the results showed the novel catalytic packing was a suitable catalyst for the acid catalyzed reactions.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
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IF 9.5
Yujie Yang,Enming Huang,Panchan Dansawad,Yize Li,Yashi Qing,Changzheng Lv,Lixia Cao,Siming You,Yanxiang Li,Wangliang Li
Deep oil-water emulsions separation is a challenging task for oily wastewater treatment . Herein, a superwettable nanofibrous membrane was fabricated using the integrated method of electrospinning, microwave-assisted growth, and in-situ polymerization. The membrane possessed superhydrophilicity and underwater superoleophobicity due to the presence of hierarchical rough structures and hydrophilic particles and polymers. The nanofibrous membrane exhibited robust oil-water separation performances for surfactant-free oil-in-water emulsions and different types of surfactant-stabilized emulsions ( e.g. , SDBS , CTAB and Tween 80) solely under the effect of gravity. The membrane achieved a separation efficiency of >99.94% for surfactant-free oil-in-water emulsions with a flux of 3563.0 L m −2 h −1 . The efficiency was above 98.90% with a flux of 1112.5 L m −2 h −1 for SDBS-stabilized oil-in-water emulsion solely under the effect of gravity. The membrane exhibited long-term oil-water separation efficiencies of above 97.0%. Moreover, the membrane showed remarkable stability and can maintain underwater superoleophobicity under different harsh conditions, which is key for large-scale oily wastewater treatment applications.
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
危险品化学品经营许可证（带存储）