DESALINATION
·
2025
·
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
·
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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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
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
·
微生物学
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2020
·
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
·
化学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2026
·
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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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
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
·
生物医学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
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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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
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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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 22
·4052-4059
·
IF 4.543
Heping Wang,Fenglong Jiao,Fangyuan Gao,Junjie Huang,Yan Zhao,Yehua Shen,Yangjun Zhang,Xiaohong Qian
Protein glycosylations play important roles in various biological processes and in the disease progression of organisms. The development of specific enrichment materials and strategies before mass spectrometric analysis was a prerequisite to glycoproteomic analysis due to the difficulty caused by substoichiometric levels of glycoproteins. In this work, novel magnetic covalent organic frameworks (denoted as Fe3O4@TpPa-1) were first developed using only a two-step solvothermal reaction and then applied in the hydrophilic enrichment of glycopeptides. Sea urchin-type composites with super-paramagnetic properties were constructed by in situ growth of TpPa-1 covalent organic frameworks on the surface of magnetic nanoparticles. A total of 37 and 22 glycopeptides could be easily detected from IgG and HRP digests, respectively, by hydrophilic enrichment with the newly developed materials. An ultralow detection limit (28 fmol), satisfactory selectivity and high recovery could be achieved using Fe3O4@TpPa-1. The material's excellent enrichment performance was also demonstrated using glycopeptide analysis in real complex samples. Within three independent replicates, 228 glycopeptides corresponding to 114 glycoproteins could be detected from human serum digests, which is better than the performance obtained by commercial HILIC materials. The results suggest that covalent organic frameworks show potential for application in glycoproteomic studies.
研究领域:
分析化学
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生物化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
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2022
·Vol. 45
·期 9
·1493-1501
·
IF 3.614
Chengjiang Zhang,Hongmei Yuan,Zeyi Lu,Yuhuang Li,Lirong Zhao,Zhuomin Zhang,Gongke Li
Covalent organic frameworks with tunable porous crystallinity and outstanding stability have exhibited fascinating pretreatment performance as ideal extraction media. Herein, the β-ketoenamine-linked TpPa-1 synthesized by 1,3,5-triformylphloroglucinol and paraphenylenediamine was employed as the absorbent for online micro-solid phase extraction of trace bisphenols combined with high-performance liquid chromatography detection. A series of characterizations indicated that the TpPa-1 possessed large surface areas, high stability, and hydrophobicity. The main experimental parameters affecting the extraction efficiency were optimized in detail. Compared with four commercial sorbents, the TpPa-1 exhibited superior enrichment capacity for extracting bisphenols. Under the optimum conditions, the established method demonstrated a wide linear range and high sensitivity with the limit of detection ranging from 0.05–0.06 μg/L. Furthermore, the developed method was successfully applied to determine bisphenols in plastic samples. Bisphenol A was actually detected in a transparent box with a concentration of 0.31 μg/g, and the recoveries of the four bisphenols in the plastic samples were 80.5–116% with the relative standard deviation less than 9.2%. Such performance was attributed to recognition affinity, including the π-π affinity, hydrophobic effect, and hydrogen bond. These results demonstrated that TpPa-1 possessed great potential to be an excellent pretreatment medium for online separation and analysis of trace analytes in complex samples.
研究领域:
分析化学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Mei-Ling Xu,Jia-Ran Li,Xiu-Mei Wu,Ting Yu,Guan-Ying Qin,Fu-Ji Wang,Li-Na Zhang,Kui Li,Xin Cheng
Covalent organic frameworks (COFs) as an emerging porous material have exhibited excellent application prospects in the field of photocatalysis. Nevertheless, the overall water splitting using solar energy by COF-based photocatalysts remains a huge challenge due to the rapid charge recombination and insufficient redox catalytic capacity. Herein, for the first time, the novel Fe-MOF-derived α-Fe 2 O 3 and FeP-PC was designed and adopted as dual co-catalysts to facilitate the separation and utilization efficiency of charge carriers and activate the overall water splitting performance of the ketoenamine based TpPa-1-COF, with both the porous α-Fe 2 O 3 and FeP-PC acting as the framework supporting to effectively prevent the agglomeration of TpPa-1-COF during the fabrication and photocatalytic process. Meanwhile, the construction of Z-scheme heterostructures and the connection of covalent bonds in the interface of α-Fe 2 O 3 /TpPa-1-COF/FeP-PC effectively facilitate the separation and transport of charge. Consequently, the optimal α-Fe 2 O 3 /TpPa-1-COF/FeP-PC excites very competitive photocatalytic overall water splitting performance.
研究领域:
材料科学
·
光催化技术
·
能源转换
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产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2023
·
IF 4
Zhang Xue-Feng,Chang Tian-Long,Guo Na,Jia Guo-Liang,Li Xiao-Bing,Zhao Zhao-Ye,Wang Hui,Wang Jun-Chuan,Wu Xiang-Feng,Pan Cheng-Si,Liu Lei,Yang Lin-Lin
Fe-based MOFs (Fe-MOFs) are excellent photocatalysts and have synergy well with Fenton reagents relative to other MOFs. In this work, a series of uniformly covered NH 2 -Fe-MIL-88B@TpPa-1-COF composites were synthesized using an in-situ anchoring growth strategy, which used F127 as functional molecule to decorate NH 2 -Fe-MIL-88B nanoparticles to eliminate their surface electrostatic repulsion with Tp molecules during the subsequent coating procedure. Meanwhile, the -NH 2 groups in the skeleton of NH 2 -Fe-MIL-88B could also be used as anchors to covalently connect TpPa-1-COF shell and migration channels for effective charge transfer. This uniformly covered core–shell structure would endow these composites with much more contact area and imine bond linkage between the Fe-MOFs core and COFs shell. Compared with the random packing structure, the uniformly covered Fe-MOF@COF-3 composite possessed a higher proportion of Fe 2+ to Fe 3+ . As a result, the optimized Fe-MOF@COF-3 catalyst could achieve the highest photo-Fenton degradation efficiency of 93.9% for tetracycline hydrochloride (TC⋅HCl), which was much higher than 54.8% of pure NH 2 -Fe-MIL-88B. In addition, the uniform TpPa-1-COF shell could further effectively enhance the stability of NH 2 -Fe-MIL-88B by protecting Fe ions from leaching, and the toxicity of the water samples treated with our photo-Fenton degradation process declined obviously. All these merits will endow Fe-MOF@COF-3 photo-Fenton catalyst great potential application value as in the field of environmental governance.
研究领域:
材料科学
·
环境科学
·
催化
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Fusheng Pan,Weixiong Guo,Yanlei Su,Niaz Ali Khan,Hao Yang,Zhongyi Jiang
Covalent organic frameworks (COFs) are emerging as crystalline porous materials for advanced membranes, due to their regular pore structures and high porosity. The fabrication of defect-free ultrathin COFs membranes is still very challenging, since the poor COF-substrate affinity hampers the nucleation of COF crystallites. In this work, a facile direct growth method was developed to deposit continuous imine-based COF layer (TpPa-1, synthesized by the Schiff-base reactions of 1,3,5-triformylphloroglucinol (Tp) with p-phenylenediamine (Pa-1)). Aldehydes groups were firstly immobilized on polyacrylonitrile (PAN) porous substrate as the nucleation sites to promote the growth of continuous TpPa-1 layer via a good COF-to-substrate adhesion. Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and X-ray diffractometer (XRD) confirmed the formation of COF layer. The TpPa-1/HPAN membrane exhibited high water flux of 418.5 L/(m 2 h MPa) under the operation pressure of 0.1 MPa and excellent dyes rejection (93.91% for Orange GII and over 99% for Methyl blue, Congo red and Alcian blue). The high separation performance, coupled with its facile fabrication and remarkable stability, may render imine-based COFs membrane promising for wastewater treatment.
研究领域:
材料科学
·
环境工程
·
化学工程
·
膜技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）