Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123915
·
IF 7.5
Jumeng Di,Xiaohua Li,Songyu Guan,Wenwen Ma,Wen Li,Jie Gao,Yuzhi Xu,Bing Yu,Hailin Cong
Nanoplastics (NPs) pose severe risks to aquatic environments, and adsorption technology provides a promising strategy for their removal. Metal-organic frameworks (MOFs) are promising adsorbents, but their practical application is limited by insufficient water stability and restricted pore accessibility. To bridge this gap, defect-engineered Al/Mn bimetallic MOFs were synthesized via mild post-synthetic ion exchange. n-Octanoic acid (OA) was employed to modulate the crystallization process of MIL-53(Al), inducing missing linker defects, suppressing excessive crystal growth, and generating mesoporous structure. Subsequently, the partial substitution of terephthalic acid linkers with manganese clusters could introduce additional active sites, alter the surface properties while maintain the overall crystallinity of MOFs. The optimized Mn-0.2-OA maintained high PS removal efficiency under acidic to neutral conditions, with removal efficiencies above 92% over pH 1–7. It also showed good tolerance to representative interference factors, retaining removal efficiencies above 97.5% in the presence of common cations and 89.37% at 40 mg/L humic acid. The adsorption of 500 nm polystyrene microspheres was mainly driven by the synergistic effects of electrostatic attraction, π-π interactions, enhanced hydrophobic affinity, and hierarchical pore structure. Meanwhile, Mn-0.2-OA achieved a Langmuir-fitted maximum adsorption capacity of 849.17 mg/g and exhibited rapid adsorption kinetics, removing 96.4% of PS within 10 min at an initial concentration of 25 mg/L. Regeneration tests further confirmed its acceptable reusability for repeated PS adsorption. This strategy provides a feasible approach for designing efficient and reusable adsorbents for nanoplastic removal from aquatic environments.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Hailong Qiao,Yurong Wang,Qiang Chen,Pingxia Guo,Xiao Liu,Meirong Cai,Feng Guo
Environmentally benign water-based lubricants are attracting increasing attention as alternatives to conventional oil-based lubricants that may cause environmental pollution. Herein, three protic poly(ionic liquid)s (PPILs) are synthesized by combining a copolymeric cation with carboxylate anions of different alkyl chain lengths. The PPILs are employed as additives in aqueous lubricants, and their viscosity-enhancing capability and tribological performance are systematically evaluated. Quartz crystal microbalance (QCM), electrical contact resistance (ECR), X-ray photoelectron spectroscopy (XPS), and time-of-flight secondary ion mass spectrometry (TOF-SIMS) are used to elucidate the lubrication mechanism. The results demonstrate that PPILs significantly improve the viscosity, corrosion resistance, and tribological properties of water-based lubricants. Notably, the kinematic viscosity of a 6% PPD-Oa aqueous solution increases by two orders of magnitude compared with deionized water, while the corresponding wear volume and coefficient of friction are reduced by approximately 77% and 70%, respectively. Mechanistic investigations indicate that interfacial adsorption and friction-induced chemical processes jointly generate a protective layer at the sliding interface, thereby imparting excellent lubricity and load-bearing capability to the lubricant. Moreover, the three sulfur-free and halogen-free PPILs represent environmentally benign additives with strong potential for application in metalworking fluids and hydraulic systems.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
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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Foods
·
2026
·Vol. 15
·期 17
·3002
·
IF 6
Min Li,Yulin Wang,Huajuan Yin,Xu Jing,Yunlong Li
Triazole fungicides (TFs) are widely used in cereal production due to their potent fungicidal activity and broad-spectrum efficacy. Nonetheless, residues of TFs in food products may pose risks to food safety and human health. Therefore, the development of efficient and environmentally friendly sample preparation methods is paramount for the reliable determination of TFs. Herein, a novel green solvent-based dispersive liquid–liquid microextraction method coupled with high-performance liquid chromatography (DLLME-HPLC) was developed for the determination of TFs in cereal samples. The prepared magnetic deep eutectic solvents (MDESs), composed of nonanoic acid and ferric hydroxide, served as green, magnetically responsive extraction solvents, enabling rapid magnetic separation without centrifugation. Four bio-based solvents (BBSs) were investigated as green dispersive solvents to facilitate the dispersion of MDESs and replace conventional toxic organic dispersants, thereby further enhancing the environmental sustainability of the extraction procedure. Owing to the combined effects of hydrophobic interactions, hydrogen-bonding networks, and magnetic responsiveness, the proposed method achieved efficient extraction and rapid phase separation while minimizing solvent consumption and operational complexity. The greenness of the method was evaluated using multiple green analytical chemistry metrics, confirming its low environmental impact, reduced waste generation, and improved operational safety compared with conventional DLLME procedures. Under optimized conditions, the method was successfully applied to determine TFs in rice, wheat, corn, buckwheat, and oat samples, achieving recoveries ranging from 75.0% to 101.9% and relative standard deviations of 1.6–4.8%. The developed DLLME method provides a rapid, sensitive, and environmentally friendly strategy for cereal pesticide residue analysis and expands the application of MDESs and BBSs in green sample preparation.
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LANGMUIR
·
2026
·Vol. 42
·期 35
·25876-25888
·
IF 4.4
Pan Feng,Wang Zihao,Yu Chuansong,Wu Guilin,Hu Jiaman,Ma Fayun,Ma Yue,Yang Ronghao,Luo Yongyue,Feng Jin,Liu Jize,Chen Zhenming
High-filling epoxy composites possess indispensable and
pivotal
performance in structural materials and functional devices; However,
owing to their intrinsic brittleness and inevitable interface defects,
potential stress concentration and structural damage may result in
unacceptable losses. Here, a nanopowder-reinforced thixotropic interfacial
design strategy was proposed, in which different morphologies of nanosized
calcium carbonate were used to reinforce guanidinoacetic acid-modified
polyborosiloxane (GPBS), which was then introduced into the organic–inorganic
interface of epoxy composites. Owing to the frequency-dependent O→B
dynamic bonds and guanidyl-carboxylate structure, the obtained GPBS
exhibits an enhanced shear-thickening behavior, with its storage modulus
( G ′ ) increasing sharply from 34.89 Pa at 0.1
Hz to 69.87 MPa at 100 Hz (an increase of 20,026.51 times). As a result,
the corresponding epoxy composites exhibited improved mechanical properties
(a 385.6% increase in tensile stress) and impact resistance performance
(a force attenuation rate of up to 80%). Meanwhile, SrAl 2 O 4 :Eu 2+ , Dy 3+ was incorporated into
the composites for stress visualization, and a machine learning-assisted
analysis system was developed for signal analysis. This study provides
an insight into high-filling functional epoxy composites, holding
great application potential in intelligent protection engineering.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Kaige Zhang,Yanrong Chen,Jing Wang,Rong Guo,Guifen Zhu
A novel supramolecular deep eutectic solvent based ferrofluid for vortex-assisted liquid-liquid microextraction (SUPRADES-FF-VA-LLME) method was developed firstly for extraction of Alkylphenols (APs) from water and beverage samples. In this method, the SUPRADES composed of hydroxyethyl-β-cyclodextrin, thymol and caprylic acid was firstly designed, synthesized and then used as carrier liquid for ferrofluid. The influencing parameters were screened by a plackett-burman design and optimized by a central composite design. Under optimal conditions, the linear range of 4-heptylphenol, 4-octylphenol and 4-nonylphenol was 0.3–400, 0.2–400 and 5–400 μg L −1 , respectively, with R 2 ≥ 0.9990. And the limit of detection and the quantification of this method were 0.05–1.5 μg L −1 and 0.2–5 μg L −1 , respectively. Both intra-day and inter-day precision ( n = 5) were ≤2.1 %, and the enrichment factor were 22–24. After microextraction, phase separation was quickly completed with the help of an external magnet, without the need of centrifugation equipment, greatly simplifying the operation steps and shortening the extraction time (∼2 min). Additionally, due to the introduction of hydroxyethyl-β-cyclodextrin, the encapsulation effect between its hydrophobic cavity and APs significantly enhances its molecular recognition ability, the method modification resulting in 19–29 % increase in extraction efficiency. Extraction mechanism was also studied by density functional theory. Combined with high performance liquid chromatography-fluorescence, this method was used for determination of APs in environmental water and beverages with spiked recovery of 98.4–102.4 %. The SUPRADES-FF-VA-LLME provides a new technique for the selective separation of pollutants, which is expected to be widely used in the field of food analysis and environmental monitoring.
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POLYMER
·
2023
·
IF 4.6
Xiaoshuai Zhang,Teng Li,Cong Yu,Weiqiang Miao,Hui Wang,Yiwei Fu,Bojun Zhou,Dan Liu,Wei Li,Tao Wang
White-light emitting diodes (WLEDs) are mainly constructed by stacking different light-emitting layers with complementary emission spectra. However, this not only requires complex device fabrication processes but also needs comprehensive charge transport regulation, limiting the development and application of WLEDs. In this work, efficient single-layer WLEDs are achieved via doping tiny amount of a red polymer poly[[9-(1-octylnonyl)-9H- carbazole-2,7-diyl]-2,5-thiophenediyl-2,1,3-benzothiadiazole-4,7-diyl-2,5 thiophenediy (PCDTBT8) into the perovskite nanocrystals (NCs) matrix. The 490 nm sky blue perovskite nanocrystals (FA 0.08 Cs 0.92 PbBr 2 Cl) are synthesized and passivated with a short-chain ligand 3-methoxyphenethylamine (MPEA), which enhances luminance and stability at high bias. Energy transfer from NCs to PCDTBT8 significantly enhances red-light emitting in the range from 600 to 750 nm, enabling white-light emission. By tuning of the NCs :PCDTBT8 weight ratio from 400:1 to 150:1, a continuous transition of emission from cold white-light to warm white-light is achieved. With the NCs:PCDTBT8 weight ratio of 250:1, a standard white-light emission with the Commission Internationale de l’Eclairage (CIE) coordinates of (0.33, 0.33), a luminance of 752 cd/m 2 and an external quantum efficiency (EQE) of 1.59% are obtained at a fairly low voltage of 4.8 V.
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JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Yuyang Di,Yilei Lu,Xianliang Li,Zhihao Chen,Wenzhong Yang
In this paper, two imidazoline derivatives, N 1 -(2-aminoethyl)- N 2 -(2-((2-(2-heptyl-4,5-dihydro-1 H -imidazol-1-yl)ethyl)amino)ethyl)ethane-1,2-diamine (HEIM) and N 1 -(2-aminoethyl)- N 2 -(2-((2-(2-(perfluoroheptyl)-4,5-dihydro-1 H -imidazol-1-yl)ethyl)amino)ethyl)ethane-1,2-diamine (PFIM), have been used as corrosion inhibitors of carbon steels in 1 M HCl at elevated temperatures. Two inhibitors are confirmed by 1 H NMR, 13 C NMR, high-resolution mass spectra and FT-IR tools. Electrochemical and immersion tests indicate that the PFIM displays a stable protection performance at different temperatures, with an inhibition efficiency value around 95%. Moreover, scanning Electron Microscopy (SEM), energy dispersive X-ray (EDX) analysis, atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS) indicates that the PFIM inhibitor film shows high hydrophobicity and stability at 363 K. Theoretical calculations suggest that the adsorption of PFIM is mainly through the bonding of the F of fluorocarbon chain on the Fe surface. This study helps us further explore the inhibition mechanisms of fluorocarbon chain-based imidazoline derivatives at high temperatures.
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JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Wenjian Yue,Xiaojiang Li,Junhao Jing,Jie Qi,Shanshan Dai,Hongsheng Lu,Zhiyu Huang
Hydrocarbon pollutants are not only serious environmental hazards in the exploitation of petroleum resources, but also lead to incomplete utilization of resources. At present, a green solvent called deep eutectic solvents (DES) gradually replaces traditional organic solvents to recover petroleum hydrocarbons, but its recovery still needs to be optimized. For this reason, hydrophobic DES with hydrophilic and hydrophobic properties that can be controlled by CO 2 was developed using fatty acid (FA) as raw material. In the process of using liquid FA to drop into solid FA to prepare DES with an adjustable melting point, DCS technology was used to accurately obtain the melting point and latent heat of the experimental reagent FAs, and the solid − liquid diagram of DES was predicted. Interestingly, the DES prepared by the addition of solid FA and liquid FA retains its strong hydrophobic properties, while the viscosity and melting point can be significantly reduced. FA can transform from oil-soluble physical property to water-soluble physical property by electrostatic binding to polyether amine (D230). This weak non-covalent bond force can be dissociated by CO 2 stimulation, FA can be restored to oil-soluble state, and D230 in aqueous phase can be reduced by removing CO 2 by heating or bubbling N 2 . The reversible pH transformation of the system and 1 H NMR confirm this CO 2 -switchable behavior. In addition, sustainable oil separation (kerosene) was successfully achieved with a maximum oil recovery of 94.6%. Therefore, the novel FA-based DES is expected to be used as an effective extractant for the sustainable clean recovery of hydrocarbons from petroleum resources.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Qiangqiang Wang,Xuanyu Zhang,Lei Qian,Chaoyu Xiang
Perovskite quantum dot light-emitting diodes (QLEDs) are potential candidates for next-generation displays due to their high color purity and wide color gamut. Due to the strong electron-accepting ability of poly[bis(4-phenyl) (2,4,6-trimethylphenyl) amine] (PTAA), quantum dot (QD) films are prone to be charged, which leads to the imbalance of charge injection and the increase of nonradiative recombination, ultimately affecting the performance of the QLEDs. Here, we compared and studied two polymers, poly(methyl methacrylate) (PMMA) and poly(vinyl pyrrolidone) (PVP), as the hole interface buffer layers of QD films, which effectively reduced the defect density, suppressed nonradiative recombination, and greatly improved the efficiency and stability of QLEDs. The devices with PMMA achieved a maximum external quantum efficiency of 20.71%.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2023
·
IF 4.5
Jun-lian WANG,Lu LIU,Guo-dong XU,Pei-long WANG,Guo-yong HUANG,Feng-shan YU
To seek more efficient extractant for Pd recovery from leaching solution of spent automotive catalysts, a new compound N-methyl-N-isopropyl octanthioamide (TA-813) was synthesized and characterized through FT-IR, 1 H NMR, ESI-MS and elemental analysis. Its extraction and stripping behaviors for Pd were studied. To evaluate its reusability performance, extraction−stripping cycles were carried out. Finally, TA-813 was applied to separating Pd from simulated leaching solution of spent automotive catalysts. TA-813 shows fast extraction kinetics, high extraction efficiency and specific selectivity for Pd. During extraction two TA-813 molecules coordinate with one Pd. The loaded Pd in the organic phase is efficiently stripped by neutral and acidic thiourea solutions. TA-813 shows no loss in activity after eight extraction−stripping cycles. Even from simulated leaching solution of spent automotive catalysts, in which the concentrations of some purities (La, Ce, Mg, Al) are much higher than that of Pd, Pd is still selectively extracted.
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Small
·
2023
·Vol. 19
·期 35
·2302060
·
IF 13.3
Ping Li,Bo He,Xuan Li,Yunfei Lin,Shaokun Tang
2D materials that can provide long-range ordered channels in thin-film form are highly desirable for proton exchange membranes (PEMs). Covalent organic framework nanosheets (CONs) are promising 2D materials possessing intrinsic porosity and high processability. However, the potential of CONs in PEMs is limited by loose sheet stacking and interfacial grain boundary, which lead to unsatisfied mechanical property and discontinuous conduction pathway. Herein, chitosan (CS), a natural polymer with rich NH 2 groups, is designed as the linker of dual-sulfonate CONs (CON-2(SO 3 H)) to obtain CON-2(SO 3 H)-based membrane. Ultrathin CON-2(SO 3 H) with high crystallinity and large lateral size is synthesized at water–octanoic acid interface. The high flexibility of CS chains and their electrostatic interactions with SO 3 H groups of CON-2(SO 3 H) enable effective connection of CON-2(SO 3 H), thus endowing membrane dense structure and exceptional stability. The stacked CON-2(SO 3 H) constructs regular hydrophilic nanochannels containing high-density SO 3 H groups, and the electrostatic interactions between CON-2(SO 3 H) and CS form interfacial acid–base pairs transfer channels. Consequently, CON-2(SO 3 H)@CS membrane simultaneously achieves superior proton conductivity of 353 mS cm −1 (under 80 °C hydrated condition) and tensile strength of 95 MPa. This work highlights the advantages of proton-conducting porous CON-2(SO 3 H) in advanced PEMs and paves a way in fabricating robust CON-based membranes for various applications.
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