JOURNAL OF HAZARDOUS MATERIALS
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2017
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IF 6.065
Jing-Min Liu,Xing-Zhi Wang,Chao-Yue Zhao,Jia-Li Hao,Guo-Zhen Fang,Shuo Wang
Herein, for the first time, the typical porous Covalent Organic Frameworks (COFs) CTpBD with superior chemical stability and large surface area were applied as sorbents for solid phase extraction of trace ions via flow injection followed by inductively coupled plasma mass spectrometry (ICP-MS) detection. The well-prepared and fully-characterized CTpBD COFs were filled in solid phase extraction cartridge as novel and robust adsorbents for element analysis. Separation and enrichment of Cr (III), Mn (II), Co (II), Ni (II), Cd (II), V (V), Cu (II), As (III), Se (IV), and Mo (VI) was then carried out, and the contents were measured by ICP-MS. Owing to the large surface area and instinctive porous structure of CTpBD, preconcentration of the target trace elements via COF-filled on-line SPE column has achieved low detection limits of 2.1-21.6 ng L −1 along with a wide linearity range at 0.05–25 μg L −1 for all target ions. The relative standard deviations (RSD) of 1.2%-4.3% obtained via 11 parallel determinations at the sample concentration of 100 ng L −1 revealed excellent repeatability of the developed methods Our proposed methods have been successfully utilized for trace element analysis in environmental and food samples.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Jingjing Jiang,Yushuang Hu,Shijian Zhou,Kaiyuan Xin,Anming Xu,Yuyao Chen,Shaowen Wu,Yan Kong
Hydrogen peroxide (H 2 O 2 ) exhibits substantial potential for applications in sustainable chemistry; however, its photocatalytic synthesis in aqueous media is plagued by key challenges, including inadequate charge separation, unstable reaction intermediates, and cumbersome product recovery processes. This study introduces the benzyl alcohol (BA)-water system integrated with benzo[1,2-b:3,4-b’:5,6-b”]trithiophene (BTT)-based covalent organic frameworks (COFs) to address imitations. The planar, sulfur-rich BTT unit enhances π stacking and interfacial charge separation, while the unique π-π interaction between BTT-n-COFs and BA regulates the charge distribution and optimizes the microenvironment of active sites. This configuration enables BTT-3-COF to achieve an unprecedented H 2 O 2 production of 13,055 μmol g −1 h −1 . More importantly, unlike conventional systems that necessitate catalyst recovery, the present system utilizes inherent phase separation to enable facile and continuous product extraction. Remarkably, the system sustains continuous H 2 O 2 production for over 20 cycles without loss of activity, yielding a ready-to-use solution that proves effective in both inhibiting bacterial growth and degrading pollutants. Experimental and computational analyses reveal a dual-channel mechanism: spatially segregated superoxide radical (∙O 2 − , oil phase) and hydroxyl radical (∙OH, aqueous phase) synergistically drive water oxidation reaction (WOR) and oxygen reduction reaction (ORR). This work presents an innovative example for sustainable and durable photocatalytic H 2 O 2 production.
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Materials Today Physics
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2026
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IF 9.3
Wenxing Luo,Minming Zou,Jue Wang,Yan Ma,Xiaowu Hu,Wenjing Chen,Xiongxin Jiang,Qinglin Li
Phase change materials (PCMs) with photothermal properties can effectively convert solar energy into thermal energy and store it via phase change, subsequently provide heat for human body in cold environments. The introduction of photothermal fillers into polyurethane PCMs to develop photothermal polyurethane PCMs has been widely studied. However, the incompatibility between photothermal fillers and matrix leads to severe deterioration in the composite's flexibility. Therefore, achieving both the mechanical and photothermal properties of polyurethane PCM in wearable products is a pressing issue. In this work, a polyurethane PCM with intrinsic flexibility and photothermal properties was designed. It consists of small molecules filled with π-π conjugated structures and polyethylene glycol crosslinked through chemical interactions. By selecting diamine crosslinkers with varying conjugation strengths, the influence of π-π conjugation on flexibility and photothermal properties of polyurethane PCM was investigated. The results demonstrate that the stronger the π-π conjugation, the better the photothermal performance, with a photothermal conversion efficiency reaching up to 71.4%. Additionally, the strong intermolecular forces generated by π-π stacking also endow polyurethane PCM with high-temperature morphological stability, high tensile strength (22.4 MPa), and excellent toughness (351.1 MJ/m 3 ). The intrinsic photothermal properties and good mechanical performance of polyurethane PCM make it suitable as a material for fabrics and coatings, ideal for wearable products in extreme cold environments, such as north pole and snowfields, where thermal energy is required.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Wenbo Yang,Chengming Xiao,Yuxin Tian,Yunlong Wang,Junwen Qi,Yujun Zhou,Zhigao Zhu,Yue Yang,Jiansheng Li
While the significance of the coordination microenvironment in single-atom catalysts (SACs) is well recognized, precise modulation of the more extended coordination sphere remains a substantial challenge. Herein, a series of cobalt-based SACs (Co/TpHz, Co/TpPa, Co/TpBD) were fabricated via a secondary coordination sphere (SCS) modulation strategy. This was achieved by anchoring isolated Co sites into three β-ketoenamine-linked covalent organic frameworks (COFs) with tailored conjugation degrees in their frameworks, which resulted from the controlled variation in the number of aromatic rings within the aminobenzene-based linkers. Remarkably, the monobenzene-type Co/TpPa catalyst exhibited superior performance in the removal of bisphenol A via Peroxymonosulfate (PMS) based Fenton-like reactions, achieving an exceptional reaction rate constant ( k ) of 0.54 min −1 , which is 2.6 times and 49 times higher than those of Co/TpHz and to Co/TpBD, respectively. Density functional theory (DFT) calculations revealed that modulation of the SCS significantly influences the electronic structure of the Co sites. Notably, the active sites in Co/TpPa exhibited the strongest adsorption energy (–1.60 eV) toward PMS, along with the lowest reaction energy barrier. This work offers valuable insights into the role of the SCS in SACs and opens a new avenue for the rational design of high-performance Fenton-like catalysts.
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DESALINATION
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2026
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IF 9.8
Xiaohuan Tang,Jinying Zhang,Huiyuan Chu,Jiwei Shen,Chaozhan Wang,Yinmao Wei
Adsorption is effective for removing radioactive iodine in nuclear wastewater treatment, while composite adsorbents can optimize the adsorption performance of adsorbents. In this work, Chitosan and polyphosphazene were used to prepare an aerogel monolith (CS/PCD) with facile recyclability, high hydrophilicity, ultra-lightweight properties, and hierarchical porous structure via hydrothermal synthesis and freeze-drying. Under static conditions, the effects of adsorbent dosage, pH, coexisting ions, and contact time on iodine adsorption were studied. The results demonstrate that CS/PCD reaches a saturated iodine adsorption capacity of 1.20 g·g −1 in aqueous solution, exhibiting good regeneration performance and anti-ion interference capability in accordance with the Freundlich isotherm and pseudo-second-order kinetic models. Under dynamic adsorption conditions, the breakthrough behavior further confirms the material’ effective iodine capture performance. Notably, CS/PCD exhibited a broad applicable pH range (3–8) and good acid-base stability. Furthermore, CS/PCD also demonstrates exceptional performance in gaseous iodine adsorption, achieving a saturation capacity of 3.49 g·g −1 at 348 K. FT-IR and XPS analysis revealed the driving force of adsorption arises from charge transfer through N and O atoms, π-π stacking, hydrogen bonding (N-H···I and O-H···I), and hierarchical porous (microporous-mesoporous-macroporous). In conclusion, this work develops a high-efficiency monolithic adsorbent for radioactive iodine capture, offering a promising continuous-flow method for nuclear wastewater treatment.
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CHEMISTRY-A EUROPEAN JOURNAL
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2026
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IF 3.7
Zhe Wang,Ziai Xing,Xiaomei Ma,Yiyuan Fu,Yucheng Jiang
In this work, hierarchical covalent organic frameworks (H-COF (PS)) were prepared via a hard template strategy using polystyrene spheres (PS) as the template. The H-COF (PS) exhibits high stability in aqueous solution without skeleton collapse. When used as a carrier for enzyme immobilization, the H-COF (PS) shows several outstanding advantages. The well-defined macropores and micropores are distributed throughout the COF. The created macrospores provide sufficient space for distribution of enzyme while the intrinsic micropores can concentrate substrates. The macropores and micropores in H-COF (PS) are adjacent, so the substrate can access to horseradish peroxidase (HRP) with lower diffusion resistance than that in solution, resulting in enhanced enzymatic catalytic activity. The porous skeleton in H-COF (PS) can protect the embedded enzyme from inactivation caused by high temperature and organic solvents, ensuring HRP stability under strict reaction conditions. The prepared HRP immobilized H-COF (PS) (HRP@H-COF(PS)) demonstrates high efficiency in dye decolorization applications. This work provides a new platform to design enzyme-nanomaterials composites with both high activity and stability. Graphical Hierarchical Covalent Organic Frameworks (H-COF (PS)) are prepared using Polystyrene Spheres (PS) template. Created macrospores provide space for enzyme while the micropores concentrate substrates. The porous skeleton protects the loaded enzyme from inactivation at high temperature and in organic solvents. The horseradish peroxidase loaded is efficient in dye decolorization and 2,4-dichlorophenol degradation.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Fenglong Dai,Tingyuan Wang,Yanan Liu,Xiaocui Wei,Fu Zhao,Enshen Shi,Yigui Du,Chunjia Wang,Shijie Liu,Chunyang Fan,Yuhan Wang,Zhongyi Jiang
Mixed-dimensional COF membrane is constructed with 2D COF nanosheet and 1D COF nanotube. • 2D COF nanosheets served as the building block to provide in-plane mass transfer channels • 1D COF nanotube acts as intercalator to construct additional interlayer mass transfer channels. • The membrane exhibits high permeance for solvents and high rejection for dyes. • The membrane shows stable separation performance in long-term test. Covalent organic framework (COF) membrane holds significant potential in organic solvent nanofiltration (OSN), and the regulation of mass transport channels in covalent organic framework nanosheets (CON) assembled membrane is the key for the high separation performance. Herein, we utilized two-dimensional (2D) CON and one-dimensional (1D) COF nanotube (COF-NT) to prepare mixed-dimensional CON/COF-NT membrane for fast OSN. 2D CON served as the building block of the membrane to provide in-plane mass transfer channels and 1D COF-NT acted as intercalator to construct additional interlayer mass transfer channels, thus constructing the stable mixed-dimensional channels to enhance the membrane permeance while ensuring its high selectivity. As a result, CON/COF-NT membrane exhibited high permeance of 293 L m −2 h −1 bar −1 , 354 L m −2 h −1 bar −1 and 366 L m −2 h −1 bar −1 for water, acetone and acetonitrile, respectively, while maintaining high rejection rates of 96.0%, 98.6% and 100% for Methyl blue, Congo red and Alcian blue 8GX, respectively. Furthermore, compared with using 1D cellulose nanofiber as the intercalator, CON/COF-NT membrane maintained more stable water permeance with transmembrane pressure ranging from 0.5 bar to 3.0 bar, and separation performance for the 7-day long-term test. This study provides a novel approach to regulating the mass transport channels in COF membrane to achieve fast OSN. Mixed-dimensional COF membrane is prepared using two-dimensional COF nanosheet and one-dimensional COF nanotube as the building block to provide in-plane mass transfer channels and intercalator to construct additional interlayer mass transfer channels, respectively, leading to fast organic solvent nanofiltration. Download: Download high-res image (161KB) Download: Download full-size image
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JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Siyao Wang,Tianyou Li,Zeyuan Gao,Lu Bai,Fangxu Fan,Shuang Zhang,Peiyao Niu,Jinyu Li,Gaohong He,Canghai Ma
Carbon molecular sieve (CMS) membranes, with hierarchical pore structures and pronounced molecular sieving effects, are highly promising for C 2 H 4 /C 2 H 6 separation. Conventional CMS membranes typically achieve high C 2 H 4 permeability but only moderate selectivity. Here, we present a rational design strategy by copolymerizing 6FDA with a flexible ether-containing diamine (HFBAPP) and a bulky rigid diamine (FDA). During pyrolysis, ether linkages in HFBAPP generate micropores, while the flexible segments induce local chain packing that selectively hinders C 2 H 6 diffusion. Rigid FDA units reinforce the polymer backbone and increase free volume, creating a synergistic effect that simultaneously enhances C 2 H 4 permeability and C 2 H 4 /C 2 H 6 selectivity. Comparative studies with ether-free 6 F-DABP-FDA membranes confirm the critical role of ether linkages in achieving this balance. Optimizing the HFBAPP/FDA ratio and pyrolysis temperature, the 6 F–HF-FDA (1:1) membrane achieved a C 2 H 4 permeability of 382 Barrer and a C 2 H 4 /C 2 H 6 selectivity of 12.9 at 800 °C, surpassing previously reported CMS upper bounds. This work provides a generalizable design principle for high-performance CMS membranes and advances energy-efficient C 2 H 4 purification technologies.
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JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Zhiguang Zhang,Xiaolong Ren,Guolong Huo,Shuanyan Kang,Zhenggong Wang,Nanwen Li
Fluorinated polyimides with biphenyl structure and –CF 3 with rigid chain structure exhibit great potential in membrane-based gas separation. However, the comprehensive separation performance of this type polyimides is not competitive as a gas separation material. Structure regulation is of great significance to improve the separation performance of polymer membrane. Few studies systematically investigated structure-property relationships in fluorinated polyimide structure. In this study, carboxylic groups are introduced into a fluorinated polyimide(6FDA-TFMB) via copolymerization with DABA diamine monomer . The hydrogen bond between –CF 3 group in TFMB and –COOH group in DABA is proposed to enhance chain segment rigidity and optimize polymer chain arrangement. WAXD results and FFV data indicate that inter-chain cavity of fluorinated polyimide could be finely tuned by adjusting molar ratio of TFMB and DABA in the copolyimide. The resulted copolyimide membranes thus demonstrate tunable gas permeation properties. Gas permeability of 6FDA-TFMB/DABA firstly increases and then decreases, and ideal gas selectivity continuously increases with increasing DABA molar ratio. Among the polyimides, 6FDA-TFMB/DABA(6:4) membrane demonstrated superior separation performance, e.g. CO 2 permeability of 135.6 Barrer and CO 2 /CH 4 ideal selectivity of 31.6, surpassing the commercial cellulose acetate and Matrimid membrane. Attributed to the optimized interchain interaction, the 6FDA-TFMB/DABA (6:4) membrane displays an optimized CO 2 plasticization resistance and physical aging in comparison with 6FDA-TFMB membranes. This study provides a guideline for controlling and optimize the performance of biphenyl fluorinated polyimide gas separation membrane .
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JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Jiawen Cheng,Jiping Ma,Shuang Li,Qiaoning Wang,Min Lv,Jinhua Li,Xiaoyan Wang,Hongdan Wang,Lingxin Chen
Hexabromocyclododecanes (HBCDs) have given their adverse effects on environment and human health, and highly sensitive analysis of HBCDs in water is urgent. In this study, a new method for the determination of trace HBCDs in water was established by covalent organic framework (COF) based nylon membrane extraction (ME) coupled with ultrahigh-performance liquid chromatography−tandem mass spectrometry (UHPLC−MS/MS). The COF had been self-assembled onto the nylon membrane in a gentle strategy to fabricate COF nylon membrane. Several important ME parameters including the dosage of COF, pH, eluent condition and salinity were systematically investigated. The limits of detection and quantification were 0.011–0.014 and 0.038–0.047 ng/L for three HBCDs, respectively. The linear ranges were from 0.04 to 20 ng/L, and the relative standard deviations were 5.7–17.8 % (intra-day) and 5.2–14.1 % (inter-day). In addition, density functional theory (DFT) calculations on adsorption energy proved that the introduction of halogen bond (XB) made a key contribution to high extraction efficiency and excellent selectivity of COF nylon membrane for HBCDs. The 500 mL of samples, including tap water and reservoir water, could be extracted only in 23 min. The established method presented highly sensitive for ultra-trace analysis of HBCDs in environmental water.
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TALANTA
·
2023
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IF 6.1
Qing Dong,Xinyu Guo,Xinran Qu,Siqi Bai,Xingyu You,Hongshou Cui,Shili Qin,Lidi Gao
A novel chiral covalent organic framework (CCOF) was synthesized with an imine covalent organic framework TpBD (synthesized via Schiff-base reaction between phloroglucinol (Tp) and benzidine (BD)) modified using (1S)-(+)-10-camphorsulfonyl chloride as chiral ligand by chemical bonding method for the first time, and was characterized by X-ray diffraction, Fourier-transform infrared spectra, X-ray photoelectron spectroscopy, nitrogen adsorption/desorption, thermogravimetry analysis, and zeta-potential. The results revealed that the CCOF had good crystallinity , high specific surface area and good thermal stability. Then, the CCOF was employed as stationary phase in open-tubular capillary electrochromatography (OT-CEC) column (the CCOF-bonded OT-CEC column) for enantioseparation of 21 single chiral compounds (12 natural amino acids including acidic, neutral and basic, 9 pesticides including herbicides, insecticides and fungicides) and simultaneous enantioseparation of mixture amino acids and pesticides with similar structures or properties. Under the optimized CEC conditions, all the analytes reached the baseline separation with high resolutions of 1.67–25.93 and selectivity factors of 1.06–3.49 in 8 min. Finally, the reproducibility and stability of the CCOF-bonded OT-CEC column were measured. Relative standard deviations (RSDs) of retention time and separation efficiency were 0.58–4.57% and 1.85–4.98%, and not obviously changed after 150 runs. These results demonstrate that COFs-modified OT-CEC explore a promising method to separate chiral compounds.
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ENVIRONMENTAL RESEARCH
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2023
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IF 8.3
Jian Zhang,Yanbo Zeng,Lifen Chen,Xiaoling Lei,Yiwen Yang,Zhidong Chen,Longhua Guo,Lei Li
A novel core-shell composite of PCN-222 and molecularly imprinted poly (ionic liquid) (PCN-222@MIPIL) with high conductivity and selectivity was prepared for electrochemical sensing 4-nonylphenol (4-NP). The electrical conductivities of some MOFs including PCN-222, ZIF-8, NH 2 -UIO-66, ZIF-67, and HKUST-1 were explored. The results indicated that PCN-222 had the highest conductivity and was then used as a novel imprinted support. PCN-222@MIPIL with core-shell and porous structure was synthesized using PCN-222 as support and 4-NP as template. The average pore volume of PCN-222@MIPIL was 0.085 m 3 g -1 . In addition, the average pore width of PCN-222@MIPIL was from 1.1 to 2.7 nm. The electrochemical response for PCN-222@MIPIL sensor for 4-NP was 2.54, 2.14, and 4.24 times that of non-molecularly imprinted poly (ionic liquid) (PCN-222@NIPIL), PCN-222, and MIPIL sensors, respectively, which result from superior conductivity and imprinted recognition sites of PCN-222@MIPIL. The current response of PCN-222@MIPIL sensor to 4-NP concentration from 1 × 10 −4 to 10 μM presented an excellent linear relationship. The detection limit of 4-NP was 0.03 nM. The synergistic effect between the PCN-222 supporter with high conductivity, specific surface area and shell layer of surface MIPIL results in the outstanding performance of PCN-222@MIPIL. PCN-222@MIPIL sensor was adopted for detecting 4-NP in real samples and presented to be a reliable approach for determining 4-NP.
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