MICROPOROUS AND MESOPOROUS MATERIALS
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2020
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IF 4.551
Jiaqi Ma,Xiao-Bin Fu,Yuquan Li,Tian Xia,Likun Pan,Ye-Feng Yao
This study investigates the locations and interactions of adsorbed water molecules within a porous COF material, TpPa-1. The TpPa-1 samples include the as-synthesized powder samples and the samples first subjected to compression at high pressure and then ground into a powder form. The investigation applies a variety of advanced solid-state NMR techniques. The results indicate that the adsorbed water molecules in the as-synthesized and compressed samples can exist in different locations and bonding states. Here, the adsorbed water molecules in the as-synthesized samples are found to be mainly located in the pore spaces and interact only loosely with the chemical groups of the material. In contrast, a proportion of the water molecules in the compressed samples enter into the interstices between the layers and interact with the amino groups and the carbonyl groups of the material. The relocation of the water molecules in the compressed samples provides a plausible explanation for the molecular origin of the water adsorption capability of TpPa-1. In addition, the revealed weak interactions between the water molecules and the chemical groups of TpPa-1 are correlated with the molecular origin of the high water permeance.
研究领域:
材料科学
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化学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Zhikun Li,Zhe Zhao,Xi Zhu,Shumin Lin,Jinyu Wang,Shu-Xuan Liang
Fluoroquinolone antibiotics (FQs) are a class of antibiotic pollutants of global concern for water due to their high chemical stability and low biodegradability, leading to long-term residues. In this study, a novel composite material composed of metal-organic framework (MOF) and covalent organic framework (COF), ZIF-8@TpPa-SO 3 H, was designed for the selective adsorption of quinolones and synthesized using ultrasonic method. The adsorption kinetics, isotherms, thermodynamics and influencing factors of ZIF-8@TpPa-SO 3 H towards three FQs, including enoxacin, norfloxacin, and ciprofloxacin, were investigated. Characterized by an abundant pore structure and uniform element distribution, the composite exhibited a specific surface area of 34.25 m²/g and an optimized pore size distribution of 15.72 nm. The adsorption selectivity experiment showed that ZIF-8@TpPa-SO 3 H achieved a removal rate of over 90% for FQs, which was significantly higher than those of other types of antibiotics. The adsorption of FQs on ZIF-8@TpPa-SO 3 H followed the pseudo-second-order kinetic model, and chemisorption was the predominant mechanism. The maximum adsorption capacities for enoxacin, norfloxacin, and ciprofloxacin were 595.4, 566.4, and 568.6 mg/g, respectively. Furthermore, electrostatic interactions and hydrogen bonding were the main adsorption mechanisms. Density functional theory calculations and X-ray photoelectron spectroscopy analysis further confirmed that selective adsorption is synergistically enhanced by electrostatic interactions between piperazine and sulfonic acid groups and C-H⋯π interactions of the FQs. Additionally, the composite maintained a removal rate above 85% after 8 adsorption-desorption cycles, demonstrating its good applicability. It also exhibited satisfactory applicability in treating water samples from different sources. This study provides a theoretical and practical foundation for the development of efficient and recyclable FQ adsorbents.
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高影响因子
Small
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2026
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IF 11.8
Jiamin Qiu,Yu Liu,Zhenlong Liu,Jiajun Li,Siqi Geng,Jizhen Li,Guofang Zhang,Ziwei Gao
Combustion catalysts commonly improve the burning performance of composite solid propellants by lowering the thermal decomposition temperature of ammonium perchlorate (AP) and increasing AP heat release. However, heat release over a narrow temperature range is also critical for ignition response and regulation of the burning rate. To address this gap, we propose a concentrated heat release strategy for AP catalysis. This strategy is implemented using the Cu-BDC-NH 2 @TpPa heterostructure (Cu-BDC-NH 2 = copper 2-aminoterephthalate; TpPa is formed by Tp, 1,3,5-triformylphloroglucinol, and Pa, p-phenylenediamine). The TpPa layer regulates contact between AP and Cu active sites. DSC results show that Cu-BDC-NH 2 @TpPa-0.20 centers the main AP exothermic peak at 322°C and narrows the heat release range from 60°C for Cu-BDC-NH 2 to 12°C. Electrochemical measurements reveal lower electrochemical polarization and a more sensitive interfacial current response in the redox potential region. Condensed-phase in situ FTIR and TG-DSC-FTIR-MS analyses indicate that the TpPa interface modulates the local NH 4 + /ClO 4 − vibrational environment and gaseous product evolution. DFT calculations suggest that the thermally evolved CuO/C composite interface favors the adsorption and transformation of NH 3 -related intermediates while facilitating the desorption of NO and NO 2 products. This work provides an interface regulation strategy for combustion catalysis in energetic materials.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Chaoyan Zhang,Zhen Jiang,Peng Guo,Jianjun Song,Chuan Shi
The incorporation of inorganic electrolyte fillers into solid polymer electrolytes (SPEs) provides fast Li-ion transport channels, enhancing the ionic conductivity of SPEs. However, their insufficient specific surface area and poor compatibility with the polymer matrix impede the efficient diffusion of Li-ions from polymer into fillers, thereby limiting further advancements in SPEs. To address this challenge, we propose the utilization of covalent organic frameworks (COFs), TpPa-SO 3 Li, as fillers due to their rapid Li + transport properties, favorable compatibility with the polymer matrix, and ultra-high specific surface area. Validated by in-situ conductive AFM and DFT calculation, TpPa-SO 3 Li provides high-speed Li + transport pathways in the polyvinylidene fluoride-based SPEs (PVDF-TpPaSO 3 Li). This is attributed to their higher affinity energy of −1.93 eV compared to 1.34 eV of PVDF and their low Li + migrating barrier of 0.35 eV. Consequently, PVDF-TpPaSO 3 Li exhibits an outstanding ion conductivity of 1.93 mS cm −1 at 30 °C, an enhanced ion transfer number of 0.44, and a desirable mechanical strength of 13.5 MPa. The lithium-symmetrical batteries with PVDF-TpPaSO 3 Li exhibit stable Li stripping/plating cycling for 2500h at 60 °C and 0.1 mA cm −2 . Similarly, LiFePO 4 /Li batteries also display stable cycling with a retention in capacity of 93.83 % after 300 cycles at 0.5C.
研究领域:
材料科学
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电化学
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DOI
高影响因子
DESALINATION
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2025
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IF 9.8
J.Y. Chen,X.N. Ren,X.W. Gao,Z.X. Yang,G.G. Cheng,X.H. Hu,D.T. Bui
The development of next-generation desiccant materials is essential for achieving energy-efficient atmospheric water harvesting and air dehumidification under hot and humid conditions. Conventional desiccants such as silica gel and zeolites are limited by high regeneration temperatures, low water uptake, or poor hydrothermal stability, while salt-based sorbents suffer from deliquescence and leakage. To address these challenges, this study presents a LiCl@TpPa-1 covalent organic framework (COF) composite that integrates the structural robustness of TpPa-1 with the hygroscopic functionality of lithium chloride. Structural and thermodynamic analyses confirmed that LiCl incorporation enhances water affinity without compromising crystallinity or stability, enabling low-temperature regeneration below 70 °C. The composite was successfully coated onto aluminum heat exchanger fins using an optimized polymeric binder, yielding a uniform, durable sorption layer. System-level testing demonstrated a more than threefold improvement in moisture removal and a 2.5-fold increase in thermal coefficient of performance (COP) compared to silica gel under tropical conditions. This study goes beyond material-level characterization by bridging the gap between laboratory synthesis and practical application. The composite was successfully coated onto aluminum heat exchanger fins using an optimized polymeric binder, forming a uniform and durable sorption layer. System-level testing under realistic operating conditions demonstrated more than a threefold enhancement in moisture removal and a 2.5-fold increase in the thermal COP compared to silica gel under tropical climates. The material also exhibited excellent cyclic stability with negligible capacity loss after repeated dehumidification–regeneration cycles. These results highlight LiCl@TpPa-1 as a promising desiccant for sustainable, low-grade heat-driven dehumidification and water-harvesting technologies.
研究领域:
材料科学
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环境工程
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能源系统
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可持续技术
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吸附材料
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 9
Houyi Peng,Wenqi Zhang,Ji Chen,Qi Zhang,Xiao Xiao,Weixing Li
Polyamide nanofiltration membranes often exhibit reduced rejection rates and flux decline under high ionic strength conditions. In order to efficiently remove heavy metal ions (HMIs) from water, a TpPa-COF interlayered positive nanofiltration membrane was proposed. TpPa-1 COF was synthesized and then reacted with 1,3,5-Benzenetricarbonyl trichloride (TMC) to narrow the pore size. The narrowed pore size from 18 Å to 5.4 Å was designed for rejection of heavy metal ions (>5.8 Å). Then, the membrane was functionalized with polyethyleneimine (PEI) grafting to impart positive surface charges for enhanced HMIs removal. The developed membrane was systematically characterized and evaluated for its physicochemical properties and performance through attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), cold-field emission scanning electron microscope (SEM), and atomic force microscopy (AFM). The fabricated membrane achieved exceptional rejections of Cr 3+ (99.04 %), Mn 2+ (97.03 %), Co 2+ (97.74 %), Ni 2+ (98.43 %), Zn 2+ (98.85 %), and Cd 2+ (99.07 %) at a feed concentration of 1000 ppm. Notably, the membrane maintained the rejection efficiency of 90 % under a higher feed concentration of 6000 ppm, which is better than the commercial NF3 membrane. After 7 days of continuous operation, the rejection of HMIs exceeded 98.4 %, demonstrating the great stability. When treating actual electroplating wastewater, the membrane showed good performance. The removal rate for major ions (Cr(VI), Co 2+ , Cu 2+ , Mn 2+ , Ni 2+ , Zn 2+ ) reached from 97.4 % to 99.99 %. The developed membrane exhibited better performance than commercial membrane, demonstrating the practical potential in treating actual wastewater.
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高影响因子
EUROPEAN POLYMER JOURNAL
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2024
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IF 5.8
Chaoji Xiong,Kejie Li,Chunzhi Peng,Xingmao Zhang,Kun Liang,Wei Wu,Qian Chen
In this study, the thiophenyl polyamide ( TPPA ) derived from tri(4-aminophenyl) benzene was synthesized for the removal of Hg 2+ from the aqueous solution. The adsorbent was characterized by the Fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy, scanning electron microscopy, nitrogen adsorption–desorption, thermogravimetric analysis and differential scanning calorimetry. The adsorption capacity of Hg 2+ is 518.7 mg g −1 at a dose of 1.1 g/L of adsorbent. TPPA was shown to have the following advantages: (i) the high selectivity for the excess metal ions Hg 2+ , (ii) the stability in the pH values ranging between 2 and 6, and (iii) the proper recyclability (87 % of Hg 2+ can be removed in 5 adsorption–desorption cycles). Our analysis suggests the models of the pseudo-second-order kinetics and the Langmuir isotherm are suitable for the description of the adsorption of Hg 2+ on the thiophene network polyamide. Our experimental and theoretical results reveal the relationship between the structures and the adsorption capacities of TPPA , identifying the oxygen atom (amide) and the sulphur atom (thiophene) as the most important chemical-reaction sites.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Yuan Li,Biao Pei,Junjie Chen,Shaosuo Bing,Linxiao Hou,Qi Sun,Gang Xu,Zhikan Yao,Lin Zhang
A novel catalyst with a yolk-shell structure was designed to overcome the leaching of noble metals in heterogeneous catalysis. Through a template method, palladium (Pd) nanoparticles were encapsulated by hollow spherical covalent organic frameworks (COFs) consisting of 2,4,6-trihydroxybenzene-1,3,5-tricarbaldehyde (Tp) and p-phenylenediamine (Pa). The final catalyst with a yolk-shell structure was denoted as (Pd/C)@TpPa COFs. The unique morphology and chemical structure of this novel composite (Pd/C)@TpPa COFs were confirmed by a transmission electron microscope (TEM), a laser particle analyzer, X-ray diffraction (XRD), and N 2 adsorption and desorption. Subsequently, to demonstrate its catalytic performance brought by structural design, this novel catalyst was applied to catalyze the Suzuki reaction . Interestingly, this catalyst exhibited a brilliant size cutoff efficiency for aryl benzene amounting to 100% and achieved a high conversion with only 0.05 mol% Pd loading. Besides, this catalyst could be readily recovered via filtration and reused for at least five consecutive cycles without any significant loss in its activity.
研究领域:
化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2021
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IF 4.098
Yaxin Zhao,Yuyu Ma,Yinhuan Li
A simple and feasible strategy was developed for the preparation of fluorescent covalent organic frameworks (COFs) TpPa-1@FL. The TpPa-1–1@FL was prepared via a self-assembly strategy by soaking non-fluorescent COFs TpPa-1 into strong fluorescent fluorescein (FL) solution. A chemiluminescence resonance energy transfer (CRET) system was constructed by the combination strong fluorescent TpPa-1@FL with TCPO-hydrogen peroxide (H 2 O 2 ) reaction. The chemiluminescence (CL) signal of the system was further improved by the addition of bovine serum albumin (BSA). The CRET system can determine H 2 O 2 with a linear range response from 5.0 µmol/L to 20.0 mmol/L and a detection limit of 1.1 µmol/L. The CRET system was further exploited for indirect detection of uric acid with coupling of uricase. A good linear relationship was obtained for uric acid in the 10.0–400.0 µmol/L concentration range with a detection limit of 3.8 µmol/L. The practicability of this method was assessed by the determination of uric acid in real samples of human serum and urine.
研究领域:
分析化学
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生物医学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Huizhen Shen,Li Chen,Cailong Zhou,Jingcheng Du,Chenyang Lu,Hao Yang,Luxi Tan,Xinjuan Zeng,Lichun Dong
Nanoscale zero-valent iron (NZVI, Fe 0 ) has been widely used for reduction of strong toxic Cr(VI) to low toxic Cr(III), however, given the easy aggregation of NZVI, developing new substrate support for NZVI is highly desirable. In this study, via a simple in-situ growth method, NZVI was immobilized on porous TpPa-1 covalent organic frameworks (COFs), making it an effective adsorbent for adsorption and reduction of Cr(VI) from aqueous solution. Meanwhile, to make the composite of NZVI and COFs a uniform system, dopamine (DOPA) was used as a connector to combine them. The COFs with porous crystal structure provides controlled anchors for Fe 0 loading as well as the reaction sites. Results verify that the Fe 0 / [email protected] exhibited an excellent performance in Cr(VI) removal due to synergistic effect of the composite, with the maximum removal capacity up to 516 mg/g. Furthermore, it maintained high removal capacity under acidic, neutral and alkaline environments. Therefore, the Fe 0 / [email protected] is a promising material for Cr(VI) removal from wastewater in practical application.
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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高影响因子
ACS Applied Nano Materials
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2026
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IF 5.8
Saifei Du,Lei Ding,Shuqi Li,Kun Wang,Baojiang Liu,Wei Wang,Dan Yu,Chunyan Hu
MXene-based aerogels are promising for electromagnetic interference (EMI) shielding due to their lightweight nature and high conductivity. However, their practical application is often hindered by severe impedance mismatch and excessive secondary reflection. To overcome this limitation, we developed a multifunctional ternary composite aerogel (MTCA) via a synergistic self-assembly strategy. In this architecture, TpPa-1 covalent organic framework (COF) was grown in situ and integrated with MXene nanosheets within a chitosan matrix. The resulting hierarchical porous structure significantly optimizes impedance matching. Consequently, the optimized MTCA achieves an EMI shielding efficiency of 39.93 dB in the X-band, operating via an absorption-dominated mechanism. This performance stems from enhanced interfacial polarization at the MXene/COF heterojunctions and prolonged microwave propagation paths facilitated by multiple scattering within the porous network. Furthermore, the aerogel exhibits multispectral stealth capabilities: it demonstrates low infrared emissivity (ε = 0.50), superior thermal insulation (surface temperature of 28.7 °C under an 80 °C heat source), and effective visual camouflage adaptable to environmental backgrounds. This work presents a robust strategy for designing advanced stealth materials that integrate efficient absorption-dominant EMI shielding with multispectral compatibility.
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JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Wenqiao Meng,Jinyuan Zhu,Qiang Xue,Kaisong Zhang
Covalent organic frameworks nanosheets (CONs) are two-dimensional porous nanomaterials exfoliated from covalent organic frameworks (COFs). The ordered permanent microchannels and excellent water stability of CONs make them attractive active fillers for the preparation of thin-film nanocomposite (TFN) nanofiltration (NF) membranes. Herein, we report the fabrication of TFN membranes by incorporating covalent organic framework nanosheets TpPa-1 CONs as an active filler in the organic phase during the interfacial polymerization (IP) reaction. The addition of TpPa-1 CONs promotes the formation of extra water channels (pores and interfacial cavities) in the PA layer, rendering the TFN membranes with a higher pure water permeance of 8.54 L m −2 h −1 bar −1 , which is about 1.4 times compared to TFC membrane, and excellent Na 2 SO 4 rejection of about 98.1%. Owing to the hydrophilic nature of TpPa-1 CONs, the synthesized TFN membranes also exhibited higher hydrophilicity and superior anti-fouling performance. Meanwhile, the 35-days stability experiment verified that the TpPa-1 CONs TFN membrane has superior long-term stability. As a 2D porous nanosheets, TpPa-1 CONs provided some guidance for the preparation of long-term stability NF membranes with excellent separation performance.
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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高影响因子
危险品化学品经营许可证（带存储）