SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Yan Pan,Chuanming Tu,Xueyong Li,Luteng Gao,Wei Lan,Wenhai Zhang,Hong Meng
Compared with traditional polyamide membranes, polyimine membranes possess a more rigid structure and exhibit significantly enhanced swelling resistance in organic solvent nanofiltration, enabling highly selective separation. However, their intrinsic broad pore size distribution limits their application in high-precision separation scenarios. To address this issue, this study proposes a post-modification pore shrinkage strategy: first, a polyimine composite membrane is prepared via interfacial polymerization, followed by the in-situ polymerization of residual free p -phenylenediamine within the membrane initiated by ammonium persulfate, to construct an interpenetrating network composite membrane structure composed of porous polyimine and poly( p -phenylenediamine). Experimental results demonstrate that this method effectively improves the rejection performance of polyimine membranes toward small solute molecules. The optimized PPa-5@TpPa-2 composite membrane exhibits a methanol permeance of 4.1 L m −2 h −1 bar −1 , a molecular weight cut-off as low as 320 Da, along with excellent solvent resistance, operational stability.
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Functional Materials Letters
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2026
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IF 1
Fan Yi,Jie Gao,LiBo Huang,Fu Zhao,Tingyuan Wang,Lei Han
Layer-by-layer assembled covalent organic framework membranes were fabricated by alternately depositing negatively charged TpPa-SO 3 H and positively charged TpEB nanosheets onto a pretreated nylon support via vacuum filtration. The resulting TpPa- SO 3 H/TpEB composite formed a compact selective layer stabilized by electrostatic attraction and π-π stacking. By optimizing the layer number and deposition density, the bilayer membrane achieved 99.3% Congo Red rejection with a permeance of 86.0 L m -2 h -1 bar -1 and >99% rejection for multiple dyes, with a molecular weight cutoff of 461.38 Da.
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Journal of Engineered Fibers and Fabrics
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2021
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IF 1.573
Ying Han,Jiaxun Li,Bobing He,Lixin Li
Environmental challenges, especially dye wastewater produced by printing and dyeing industry, pose a serious threat to global public health, and it is an urgent problem to realize harmless treatment of dye wastewater. Here, the combination of covalent organic framework materials (TpPa-1) and biological matrix materials (CF) was explored for the adsorption of dyes for the first time. The functional ACF-TpPa-1 composite adsorption materials were successfully prepared with collagen fiber (CF) made of leather waste as matrix, ethylenediamine (EDA) and covalent organic framework material (TpPa-1) as modified raw materials. It’s structure and properties were characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM). The experimental results showed that ACF-TpPa-1 had an adsorption capacity of 257.98 and 449.54 mg/g for acid fuchsia and reactive blue 19, respectively. It also showed excellent adsorption/desorption performance and repeatability after six cycles. As a collagen-based dye adsorbent with pH response, it has potential application prospects in the treatment of dye wastewater.
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MATERIALS SCIENCE & ENGINEERING R-REPORTS
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2025
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IF 26.8
Song Luo,Xiaohe Tian,Li Pan,Runhua Zhou,Shunda Zhu,Zuyi Yan,Kui Rao,Bo Liu,Shaofei Wang,Hong Wu
With the increasing severity of urban heat islands, personal thermal management (PTM) has emerged as a critical solution for maintaining human thermophysiological comfort in dynamic environments. Traditional air conditioning systems are energy-intensive and lack individualized control, highlighting the need for efficient, low-energy PTM strategies. Current PTM materials often operate in static modes, limiting their adaptability to varying conditions. To overcome this, we developed a Janus-structured humidity-photothermal actuator (TpPa-SO₃H/Ag@M) by integrating a TpPa-SO₃H covalent organic framework (COF) for rapid water transport and a silver nanoparticle (AgNP)-intercalated MXene (Ag@M) for humidity gradient formation and enhanced photothermal conversion. The COF layer facilitates moisture accumulation, while the Ag@M laminar structure delays water diffusion, enabling a sensitive humidity response. AgNPs expand the MXene interlayer spacing, improving water uptake and response efficiency by triple compared to initial TpPa-SO₃H/MXene systems, while also preventing structural collapse during cycling. Additionally, AgNPs enables strong solar absorption, boosting photothermal performance. Under combined humidity and light stimulation, the Janus actuator exhibits dynamic bending, enabling autonomous sweat evaporation and body temperature regulation without external energy input. This dual-responsive design offers a promising approach for adaptive, energy-efficient PTM in extreme environments.
研究领域:
材料科学
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纳米科技
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生物医学工程
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智能材料
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环境适应性材料
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Fengnan Wang,Jiuxuan Zhang,Yanhua Shao,Hong Jiang,Yefei Liu,Rizhi Chen
Covalent organic frameworks (COFs) have emerged as an excellent support for heterogeneous catalysis due to their regular pore structure and high specific surface area. Herein, a series of porous TpPa-1 with different morphologies and structures were achieved by adjusting the ratio of water to acetic acid in the solvent-thermal process, and Pd@TpPa-1 catalysts were obtained with Pd solution impregnation. Notably, Pd@TpPa-1-100 prepared with 100 wt % water as the catalyst has superior catalytic properties in the phenol hydrogenation to cyclohexanone, and its turnover frequency (TOF) of 33.1 h–1 is about 7 times higher than that of Pd@TpPa-1-0 synthesized with 100 wt % acetic acid as the catalyst. The two-dimensional (2D) nanosheet structures, highly dispersed Pd nanoparticles (NPs) with small particle size, and superhydrophilicity should be responsible for the superior catalytic performance of Pd@TpPa-1-100. Furthermore, Pd@TpPa-1-100 also has better catalytic performance in the hydrogenation of catechol, resorcinol, and hydroquinone than Pd@TpPa-1-0 and exhibits superior catalytic stability. This study provides a new approach for the structural regulation of metal-based COF catalysts.
研究领域:
材料科学
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催化化学
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MOLECULES
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2026
·Vol. 31
·期 11
·1799
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IF 5.1
Zeyuan Li,Zhenzhen Liu,Xiangping Lin,Mengyuan Ge,Nannan Wu,Xinquan Wang,Yuteng Zhou,Shuchun Wu,Wei Ding,Peipei Qi
The excessive use of herbicides in agricultural fields has emerged as a critical environmental concern. This study innovatively synthesized a ZIF-8@TPPa composite through a solvothermal method for the efficient removal of herbicides from aqueous environment. The material exhibited remarkable adsorption capacities for butachlor (232.56 mg/g), anilofos (188.68 mg/g), and pendimethalin (285.71 mg/g), along with excellent acid–base stability (pH 3–9), strong anti-ion interference capability, and good reusability (adsorption efficiency >80% after five cycles). The adsorption processes were well-described by the two isotherm models and the pseudo-second-order model, indicating that the dominant mechanism is a synergistic effect between monolayer chemical adsorption and multilayer physical adsorption, primarily driven by π-π stacking, hydrogen bonding, and coordination. The material maintained outstanding adsorption efficiency (>85%) in real water samples (tap water, seawater, and river water). This study not only provides a sustainable and effective strategy for herbicide remediation from aqueous environment but also expands the practical applications of MOF@COF in aqueous environment.
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PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 8
·1874
·
IF 3.2
Chao Wu,Haoyan Zhang,Xuan Zheng,Jing Ding,Yuanyuan Li,Feiyong Chen,Zhengfeng Zhao
The urgency of reducing pollution and developing clean energy storage requires efficient photocatalytic hydrogen evolution (PHE) tactics. To improve solar conversion efficiency, it is highly imperative to accelerate the photocarriers separation and transport through materials design. A stable hydrogen evolution photocatalyst based on TpPa-COFs (triformylphloroglucinol phenylenediamine covalent organic frameworks) was developed by a molecular-level design strategy. The study successfully introduced a molecular-scale Ir active site onto the surface of TpPa-COFs via coordination bonds. It verified the structural integrity of TpPa-COFs and the existence of Ir through the basic structural characterizations, such as Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). After the Ir-based coordination compound joining, the absorption edge of TpPa-COF-M1 and TpPa-COF-M2 was extended to 750 nm. The TpPa-COF + M1 exhibited the highest photocatalytic H2evolution rate of 662 µmol/h (10 mg catalyst) under visible-light (λ ≥ 420 nm) irradiation. The apparent quantum yield (AQY) of TpPa-COF-M1 is calculated to be 1.9%, 3.8%, 4.8%, 2.8%, 1.8%, and 0.3% at monochromatic wavelengths of 420, 450, 470, 500, 550, and 600 nm, respectively. Our findings confirm that the molecular-level design of photocatalysts can effectively boost performance and reduce cost in photocatalytic reactions and provide an important strategy for designing efficient photocatalysts.
研究领域:
材料科学
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能源化学
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光催化
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Siqi Wu,Jianhua Qiu,Jiakai Wang,Li Wang,Chuyang Y. Tang
Covalent organic frameworks (COFs) with excellent solvent stability, high porosity, and well-designed pore size, are competitive candidates for organic solvent nanofiltration (OSN). To manipulate their structures, pre-synthetic and post-synthetic modifications are commonly used. Nevertheless, pre-synthetic modifications may alter the stacking fashion of COF nanosheets ; post-synthetic modifications are constrained by limited pre-functionalities and can hardly achieve complete conversion. In contrast, defect engineering is a facile method to modify the structure of COFs through defects generated by the breakage of linkages or the usage of end-capping molecules. In this study, we adopted defect engineering to improve the OSN performance of TpPa-COF membranes constructed of 2,4,6-triformylphloroglucinol (Tp) and p -phenylenediamine (Pa) monomers with end-capping molecules—aniline (An). The membrane synthesized with 30 percent of An molecules (TpPaAn-30/HPAN membrane) maintained a continuous COF layer with a thickness of ∼20 nm but lower density or more free channels, compared to the control membrane. The optimized TpPaAn-30/HPAN membrane had improved permeance for various organic solvents (e.g., 31.8 L m −2 h −1 bar −1 for methanol, fourfold of the control membrane) but maintained rejection towards methyl blue (>90 %). It also allowed the passage of rhodamine B but blocked methyl blue when filtrating a mixed-dye methanolic solution. Herein, the usage of end-capping monomers is proven to be an efficient method to introduce transport channels and improve the separation performance of COF membranes.
研究领域:
材料科学
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化学工程
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高影响因子
DESALINATION
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2024
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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
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化学工程
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Chenglin Zhang,Guangzhe Wang,Yangbo Qiu,Chao Wang,Feng Li,Long-Fei Ren,Jiahui Shao,Yiliang He
Covalent organic framework (COF) has great advantages in the field of membrane separation, but the efficient and convenient preparation of COF membranes is still a challenge. Herein, we propose a novel method with green solvent for the preparation of COF membranes based on electrostatic spraying, which can be successfully prepared within 10 min, forming the TpPa COF with a pore size of 1.8 nm. Molecular dynamics simulations demonstrate that electrostatic spraying enhances the reaction rate by lowering the energy barrier and increasing the movement of reacting monomers. Atomization of the solvent in electrostatic spraying causes the rapid volatilization of the solvent, resulting in supersaturation of the generated TpPa, precipitation and crystallization, and promotes the formation of TpPa COF structure. The optimal COF membrane for the separation of Congo red wastewater is prepared by adjusting the voltage, concentration, and spraying time, with selectivity of Na 2 SO 4 for Congo Red attaining 118 and water permeance reaching 70.2 L m -2 h -1 bar -1 . This work not only elaborates the membrane preparation mechanism in the electrostatic spraying process, but also greatly shortens the time of COF membrane preparation compared to the traditional method (2–3 days), which contributes to the possibility for practical application of COF membranes.
研究领域:
材料科学
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环境科学
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化学工程
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高影响因子
DESALINATION
·
2024
·
IF 8.3
Lin Yu,Jia-Yue Dai,Zhen-Liang Xu,Yin-Xin Fang,Rui Jia,Yong-Jian Tang
Covalent Organic Frameworks (COFs) composite nanofiltration (NF) membrane has high permeation flux and rejection. However, the reaction rate of COFs is relatively slow. Adding acid catalyst is a common method to shorten reaction time. However, the dissatisfactory synthesis rate will lead to irregular structure of COFs materials. In this work, it is the first time to use organobase as a catalyst to prepare COFs composite membrane. The COFs structure will be optimized and the membrane performance can be enhanced. The prepared TpPa-PIP membrane compared with acid catalyzed TpPa-HAc membrane has better permeability, permeance of 89 L m −2 ·h −1 ·bar −1 and CR rejection of 99.54 %. This improvement is because of the TpPa-PIP intermediate made slower reaction speed that improves the overall regularity and crystallinity of COFs. Therefore, it is better method for broadening the application of organobase-catalyzed in preparing membranes.
研究领域:
材料科学
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化学工程
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
·
IF 7.7
Tianzhan Zhang,Yurou Wang,Rongrong Yuan,Yanfei Qi
A chemically stable crystalline covalent organic framework (TpPa-1-COF) was successfully synthesized using simple mechanical ball milling method. Owing to its hydrophobic interaction, hierarchical pores, extended π-conjugation skeleton and excellent stability, the TpPa-1-COF can efficiently immobilize aptamer to fabricate an electrochemical sensor for detection of Staphylococcus aureus ( S. aureus ), achieving a low limit of detection of 0.28 CFU⋅mL -1 (3σ/S). Furthermore, the TpPa-1-COF-based electrochemical aptasensor exhibited good stability, excellent reproducibility and high selectivity. Notably, the TpPa-1-COF-based electrochemical aptasensor can quantitatively detect S. aureus in spike samples, demonstrating its potential contribution to food safety assurance.
研究领域:
生物化学
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分析化学
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微生物学
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高影响因子
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