International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yue Huang,Xiaojing Si,Mei Han,Chen Bai,Sijie Liu
In this paper, a novel electrochemical sensor based on carboxylated multi-walled carbon nanotubes (C-MWCNTs) and chromium black T (EBT) composites modified electrodes (EBT/C-MWCNTs/GCE) were proposed for the sensitive determination of ethyl maltol (EMA). Cyclic voltammetry and differential pulse voltammetry techniques were used to investigate the performance of EMA on EBT/C-MWCNTs/GCE. The results showed that the peak current of EMA was significantly enhanced by the EBT/C-MWCNTs/GCE compared with the bare glassy carbon electrode. The peak current showed a good linear relationship with the mass concentration of EMA in the range of 10 ∼ 1000 μg/L and the detection limit is 3.3 μg/L. Moreover, the sensor is easy to prepare and shows long term stability, which has great potential application for the determination of EMA in edible oil.
研究领域:
分析化学
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食品科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Wenwen Li,Jihui Li,Jian Han,Kaili Liu,Huixin Zhang,Jianxin Chen
With the accelerated development of industry, which generates large quantities of sewage discharged into the aquatic environment, serious impacts on both environmental and human health. Detecting various organic contaminants in water sources has become common, presenting huge challenges for water treatment. Metal-organic frameworks are characterized by their rich porous structures and high chemical activity, making them ideal adsorbents for removing organic pollutants from water. In this study, sodium dodecylbenzene sulfonate is added to the precursor solution of MIL-101(Cr)-Cl 2 and synthesized hierarchical porous structure adsorbents MIL-SDBS-X, using hydrothermal synthesis to enhance their adsorption capacity, making efficient and rapid removal of bisphenol A(BPA) and chromium black T(EBT), two common organic pollutants in water, which MIL-SDBS-0.7 was the most effective. MIL-SDBS-0.7 exhibites great potential in the adsorption of BPA and EBT for its high adsorption capacity (260.5 mg -1 ·g -1 and 272.3 mg -1 ·g -1 ) and rapid adsorption (equilibrium could be achieved in 15 minutes), The findings reveal adsorption kinetics aligns with the pseudo-second-order model and the Langmuir equation best fits to study adsorption of MIL-SDBS-0.7 to BPA and EBT. Thermodynamic parameters affirm the exothermic and higher spontaneity behavior of the adsorption process . Moreover, the adsorption mechanism of MIL-SDBS-0.7 was explored, illustrating the crucial roles of effects of hydrogen bonding π-π stacking and pore filling in the adsorption of BPA and EBT. Therefore, this work not only provided a convenient strategy for the preparation of efficient and fast MIL-SDBS-0.7 hierarchical porous material but also highlighted the promising potential of synthesized absorbents as an effective adsorbent for organic pollutants in wastewater treatment and environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Small
·
2025
·
IF 12.1
Zhaoqian Zhang,Hao Sun,Shaopeng Xin,Qiaoxia Hu,Jian Wang,Yunxia Hu
Precise separation of small organic molecules and electrolyte salts is critical for various industrial processes, necessitating advanced membranes with uniform pores. Proteins, as one typical nature polymer having the exactly same structure and molecular weight, offer a promising material for making such membranes. Here, hemoglobin (BHb) and lysozyme (Lyz) are utilized to fabricate precise nanofiltration membranes through amyloid-like co-assembly, triggered by Tris(2-carboxyethyl) phosphine. Molecular dynamics simulations reveal that BHb intercalates between Lyz molecules, enhancing tight assembly and reducing defects. The Lyz/BHb membrane exhibits a high void volume of 27.2% and achieves an exceptional permeance of 335 L m −2 h −1 bar −1 . Amazingly, the Lyz/BHb membrane achieves ultra-selective molecular sieving of dyes and salts with an unparalleled high separation factor of 1.25 × 10 3 for the NaCl/Brilliant blue. The unique adaptive separation layer is formed by anchoring dye molecules into the larger pores and thus narrowing down the pore size distribution and enhancing electrostatic repulsion, endowing the membrane with a distinctive molecular sieving of dyes and salts. This study offers valuable insights to finely tailor the pore structure of the membrane by co-assembly of proteins and to significantly enhance the membrane perm-selectivity by creating an adaptive protein separation layer with a unique molecular sieving property.
研究领域:
生物化学
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材料科学
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分离技术
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Pengfei Yang,Yanan Liu,Gowan-Hugh Whalley,Chengzhi Guo,Ya Li,A.Ozgur Yazaydin,Zhongyi Jiang,Marc-Olivier Coppens,Yang Lan
Graphene oxide (GO) membranes exhibit promising potential in nanofiltration due to their controllable transport channel size and low transport resistance of water molecules, resulting in exceptional water permeability. However, the trade-off between water flux and rejection ratio stemming from tightly packed interlayers poses a challenge to the application of GO membranes in nanofiltration. To overcome this trade-off, a practical method is urgently needed to regulate the interlayer space of GO membranes. In this study, a macrocyclic molecule with a rigid porous structure, cucurbit[6]uril (CB[6]), has been introduced to enlarge and precisely adjust the interlayer distance of GO membranes, effectively addressing the trade-off dilemma. The interlayer distance can be precisely adjusted within a range of 0.46 to 1.35 nm, making it suitable for the removal of small organic molecules from wastewater. Through the optimization of GO and CB[6] quantities, the GO membrane containing 20 µg GO and 49.9 wt% CB[6] (CB6GO-4) demonstrates a high pure water flux (PWF) exceeding 171.3 L m -2 h −1 bar −1 , more than 5.9 times higher than a pure GO membrane (28.8 L m -2 h −1 bar −1 ), alongside a dye rejection ratio over 92 %, indicating the promising potential of CB[6]-intercalated GO membranes in removing organics from industrial saline wastewater.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Long Zhang,Jingzhen Wang,Ying Zhang,Linlin Zang,Yanqiu Yang,Yanhong Zhang,Xu Wang,Liguo Sun
Mixed matrix membranes (MMMs) incorporating porous covalent organic frameworks (COFs) as fillers have garnered significant attention in membrane separation for water purification. Covalent triazine frameworks (CTFs) possess high thermochemical stability, an inherent triazine conjugate structure, and tunable pore size. Despite these attributes, CTFs have been underutilized in MMMs. In this study, CTF-based porous MMMs were fabricated by blending 4,4′-biphenyldicarbonitrile (BPCN) monomer with polyacrylonitrile (PAN) and employing titanium dioxide nanoparticles (TiO 2 NPs) as a pore-forming agent. The nature of PAN also makes the mixed matrix membranes have better hydrophilicity and mechanical properties. The optimized CTF-MMM exhibited an impressive water permeance of ∼ 204 L m −2 h −1 bar −1 , accompanied by a remarkable dye rejection of ∼ 99 % and a low salt rejection. Moreover, the CTF-MMM demonstrated sustained water permeance and separation performance even after 48 h. This work introduces a synthesis strategy for fabricating high-performance CTF-based porous mixed matrix membranes, showcasing significant potential for applications in dye/salt separation.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Xueling Wang,Weiwei Bai,Man Wang,Jing Wang,Chuyang Y. Tang,Yatao Zhang
Membrane technology has been being widely employed in wastewater treatment in recent years. Developing high-permeability and high-selectivity separation membrane is a key to expand their applications. In practice, biofouling often has a negative effect on membrane performance and membrane life span. Therefore, it is urgently needed to develop novel high-performance separation membrane with fast water molecular transport channel and excellent anti-bacterial properties. Owing to the abundant water molecular transport provided by ortho -hydroxyazo-linked porous organic polymer ( o -POP) with polar functional groups and high hydrophilicity, and the excellent anti-bacteria and abundant oxygen-containing functional groups of graphene oxide (GO) material, high stable o -POP/GO composite membrane with abundant transport channel was constructed on a nylon substrate via simple in situ method in this work. The synergistic effect of o -POP and GO effectively improved the ability of water transport and anti-bacteria performance of the composite membrane. The o -POP/GO composite membrane not only possessed high water permeability of 151.3 L m –2 h −1 bar −1 and excellent dye rejection (Evans blue (EB): 96.3 %, Methyl blue (MB): 98.0 %, Congo red (CR): 99.0 %, Eriochrome black T (EBT): 97.3 %, Methyl orange (MO): 71.5 %), but also exhibited positive anti-bacterial effect for Escherichia coli.
研究领域:
材料科学
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环境工程
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生物学
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产品关联
DOI
高影响因子
Environmental Science-Water Research & Technology
·
2024
·Vol. 10
·期 8
·1871-1880
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IF 3.5
Yujie Zang,Linlin Yan,Tieying Yang,Kai Wang,Yingjie Zhang,Enrico Drioli,Jun Ma,Yonggang Li,Shanshan Ji,Xiquan Cheng
Membrane separation technology has been recognized as an effective approach to remove dyes from dyeing wastewater that are crucial for improving the quality of the pigmentation effect in the printing and dyeing industry. However, the trade-off between membrane permeability and selectivity is an inherent drawback of molecular separation membranes, which hampers the development of large-scale applications of the membrane separation process. In this work, we provide a facile approach to construct a highly selective polyamide (PA) layer on a ceramic membrane through the interfacial polymerization of branched polyethylenimine (PEI) and trimesoyl chloride (TMC) for the selective separation of dyes and salts from wastewater. With high positive surface zeta-potential (100 mV) and excellent hydrophilicity, the PA/ceramic composite membranes exhibit ultra-high solution permeance (496.4 L m−2 h−1 bar−1) while treating simulated dye/salt aqueous solutions containing 40 ppm Congo red (CR) and 1 g L−1 NaCl, which is 30 times higher compared with commercial polyamide nanofiltration membranes. Interestingly, the separation factor of NaCl to CR of the PA/ceramic composite membranes reaches above 980, which is far superior to the state-of-the-art nanofiltration membranes reported recently. Moreover, PA/ceramic membranes possess a relatively ideal long-term stability, with their permeance remaining at 280 L m−2 h−1 bar−1 after 10 h of testing. Taken together, the PA/ceramic composite membranes are highly promising for dye desalination and purification.
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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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Haowen Li,Huiwen Feng,Kai Wang,Yingjie Zhang,Jun Ma,Dan Song,Xiao Sui
Two-dimensional covalent organic frameworks (2D COFs) membranes have well-ordered nanochannels for selective molecular sieving. One-dimensional (1D) materials have been proposed to link the loosely packed COFs nanosheet for enhancing the separation performance of COFs membranes. However, it remains unclear how the enhancement arises. Herein, we demonstrate the role of 1D materials in modulating the microstructure and interlayer force of 2D COFs membranes. The optimized composite membrane, assembled from 2D COFs and chitosan exhibits a 75% enhancement in permeance without sacrificing selectivity towards different dyes. Our results show that the interaction forces between COFs and 1D materials are directly correlated to the transport nanochannels. When the interaction forces are stronger, the microstructure is more densely packed. Meanwhile, the shielding effect of 1D materials on the intrinsic channels of 2D COFs is more significant, resulting in narrow transport channels for mass transfer. In contrast, the weaker interaction forces prevent the excessive shrinkage of nanochannels, facilitating fast mass transfer and maintaining the high molecular selectivity. The work unravels the interaction forces between 2D COFs and 1D materials leading to the shaping of mass transfer nanochannels, offering a new perspective for the advancement of COFs membrane for nanofiltration.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Li Nan Xu,Yu Xiang Liu,Ya Yuan Zhang,Na Qin,Peng Xiang,Xiong Huang,Jian Hua Chen,Qian Yang
Covalent Organic Frameworks (COFs), with their high porosity, low mass density, excellent thermal stability, and tunable structures, exhibit immense potential in the field of membrane separation. However, the porous structure of COFs and their negatively charged nature result in suboptimal performance in dye/salt separation. Tetrakis(hydroxymethyl)phosphonium chloride (THPC), a zwitterionic liquid, contains a central phosphorus atom and numerous hydroxyl groups, offering the dual optimization characteristics of balancing membrane surface charge and optimizing membrane pore structure. In this study, we first modified polyethersulfone (PES) with p-phenylenediamine to prepare an amino-functionalized NH 2 PES support membrane. Subsequently, we synthesized the COFs selective layer on the NH 2 PES surface via interfacial polymerization to obtain the COFs-NH 2 PES composite membrane. Then, we employed polyethyleneimine (PEI) to modify the COFs-NH 2 PES membrane surface through a polyelectrolyte-mediated assembly strategy, forming the PEI/COFs-NH 2 PES composite membrane. Finally, we conducted THPC modification to prepare the THPC-PEI/COFs-NH 2 PES composite nanofiltration membrane. Zeta potential analysis indicated that the surface charge of the THPC-PEI/COFs-NH 2 PES composite nanofiltration membrane was essentially neutral, favoring dye/salt separation. Dye/salt separation experiments demonstrated that the THPC-PEI/COFs-NH 2 PES composite nanofiltration membrane exhibited excellent separation performance, with a CR rejection rate and dye/salt separation factor reaching up to 99.5 % and 181.2, respectively, and a flux of 211.36 L m −2 bar -1 h −1 . Additionally, by adding THPC, the membrane surface was exposed to a greater number of hydroxyl functional groups, which improved the anti-fouling and stability of the THPC-PEI/COFs-NH 2 PES composite nanofiltration membrane over time.
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
DESALINATION
·
2024
·
IF 8.3
Lin Yu,Aida Aibulatova,Zhen-Liang Xu,Li Li,Changqing Hao,Rui Jia,Yin-Xin Fang,Yan Zheng,Yong-Jian Tang
Covalent Organic Framework Materials (COFs) nanofiltration (NF) membranes have extensive applications in the field of separation. In this work, high performance TpPa COFs NF membranes were prepared with catalyst pre-diffused strategy. The catalyst pre-diffused method can let catalyst attached to the membrane surface, which can promote the formation of intermediates first, and then form a complete COFs separator layer in 30 min. The optimized membrane possesses an excellent performance of CR permeability of 97.57 L⋅m −2 ⋅h −1 ⋅bar −1 with a rejection of 99.25 % for CR. The dye/salt separation selectivity α was up to 480.16 (EB-T/NaCl). This markedly decreases the reaction duration for membrane production and enhances preparation efficiency. Consequently, the catalyst pre-diffusion strategy offers an innovative approach for the fabrication of COFs nanofiltration membranes.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Lunbo Xu,Yu Liu,Wei Wang,Shusu Shen,Ganwei Zhang,Renbi Bai
Metal-organic frameworks (MOFs) possess various beneficial potentials, including the ability to enhance the porosity and water flux of membranes, and assist in the catalysis of the photodegradation of organic compounds such as dyes, through the interactions of the metal ions within MOFs. In this study, a MOF-808/polyvinylidene fluoride (PVDF) mixed matrix membrane (MMM) was constructed using the non-solvent induced phase separation (NIPS) method, in which, an ionic liquid, 1-butyl-3-methylimidazolium chloride was introduced as the co-solvent in the casting solution solvent, to increase the dispersibility and blending ratio of MOF-808 particles in the mixture. The optimal membrane with 1.5 wt% MOF-808 exhibited ultra-high water permeability (58.08 L·m⁻²·h⁻¹·bar⁻¹) and excellent rejection for various dyes (>90 %). The ESR spectroscopy test has proved the existence of •O 2 - and •OH in MOF-808/PVDF membrane under light irradiation, and the membrane exhibited outstanding photocatalytic self-cleaning ability, achieving a Congo Red (CR) degradation efficiency of 96.57 % under light exposure. Moreover, even after five photocatalytic self-cleaning cycles, the membrane flux almost recovered to its initial state, and the membrane maintained good CR rejection (>90 %). These observations provide ideas for developing high flux membrane technologies with photocatalytic capabilities, which will be applied for efficient treatment of practical dye wastewater.
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
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yifei Tang,Hongwei Piao,Hao Zhang,Qinglin Huang,Changfa Xiao,Jian Zhao
Loose nanofiltration (LNF) membrane, which combines high permeate flux with excellent separation selectivity, is an ideal technical approach for efficient separation of dyes and inorganic salts. Here, sodium lignosulfonate (SL) as the aqueous phase additive, a novel polyamide-based LNF membrane with a thin polyamide separation layer was fabricated by delaying the interfacial polymerization (IP) reaction of piperazine. The resulting membrane exhibits excellent pure water permeance (82.77 LMH bar −1 ), impressive dye rejection of >99 % and low rejection for inorganic salts (Na₂SO₄, MgSO₄, MgCl₂, and NaCl, all below 10 %), demonstrating extremely high dye/salt selectivity (Congo Red/Na₂SO₄: 258.5). Additionally, the membrane maintained a CR rejection exceeding 99 % during continuous 40 h treatment of CR mixed salt solutions. As-prepared membrane exhibits excellent antifouling performance, with a flux recovery rate of up to 96.7 %, which is considerably higher than that of commercial NF270 membranes. With the help of the introduction of SL, a SL-decorated LNF with high hydrophilicity and surface negative charge promises great application potential in the field of textile wastewater treatment.
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DOI
高影响因子
危险品化学品经营许可证（带存储）