SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Qingping Xin,Yucheng Pan,Chao Zhang,Lei Zhang,Chensheng Dong,Ligang Lin,Lizhi Zhao,Hui Ye,Yuzhong Zhang
The CH 4 /N 2 high-efficiency membrane separation technology is capable of effectively enriching CH 4 from natural gas, and holds great potential for application in the fields of biogas purification and natural gas pipeline leak detection. However, preparing high-performance separation membranes is challenging due to the similarity between CH 4 and N 2 molecules. To enhance the CH 4 /N 2 separation performance, block polyetheramide copolymer (Pebax)/EVA blended membranes were fabricated in this study. Additionally, a novel gas leakage detection tube was prepared. The EVA14 (14 wt% VA) membrane exhibits an optimal transport-facilitated channel among a series of pure EVA membranes, resulting in a CH 4 permeability of 21.41 Barrer and CH 4 /N 2 selectivity reaches 1.80 under mixed-gas feed conditions at 35 °C. The CH 4 permeability of Pebax/EVA (30 wt%) reaches 120.5 Barrer by physical blending, and the CH 4 permeability is increased by 191 % in comparison with pure EVA14 membrane. The Pebax/EVA (10 wt%) membrane exhibits the optimum CH 4 /N 2 selectivity, and compared with pure EVA membrane increased by 35.5 %. EVA and Pebax polymers are blended for the first time for CH 4 /N 2 separation, and the blending of block polyetheramide copolymer intensifies the membrane's separation performance comprehensively. The natural gas leak detection tube was fabricated with a membrane, offering a new and efficient CH 4 /N 2 separation strategy.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2012
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IF 4.531
Guowen Chen,Wenjie Li,Chen Zhang,Chuanjian Zhou,Shengyu Feng
Phenyl-ended hyperbranched carbosilane (HBC) is synthesized and immobilized onto the inner wall of a fused silica capillary column using a sol–gel process. The hybrid coating layer formed is used as a stationary phase for gas chromatography (GC) and as an adsorption medium for solid phase microextraction (SPME). Trifluoroacetic acid , as a catalyst in this process, helps produce a homogeneous hybrid coating layer. This result is beneficial for better column chromatographic performances, such as high efficiency and high resolution. Extraction tests using the novel hybrid layer show an extraordinarily large adsorption capacity and specific adsorption behavior for aromatic compounds . A 1 ppm trace level detectability is obtained with the SPME/GC work model when both of the stationary phase and adsorption layer bear a hyperbranched structure. A large amount of phenyl groups and a low viscosity of hyperbranched polymers contribute to these valuable properties, which are important to environment and safety control, wherein detection sensitivity and special adsorption behavior are usually required.
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PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2011
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IF 5.874
Zhi-Yuan Gu,Jun-Qing Jiang,Xiu-Ping Yan
The unusual properties of metal–organic frameworks (MOFs), such as permanent nanoscale porosity, high surface area, uniformly structured cavities, and the availability of in-pore functionality and outer-surface modification, are advantageous for diverse applications. However, most existing methods for the synthesis of nanosized MOFs require an activation procedure or auxiliary stabilizing agents. Here we report a 1-min, room-temperature approach for the synthesis of nanosized isoreticular MOFs (IRMOFs) to fabricate IRMOF coated capillary columns for the high-resolution gas chromatographic separation of persistent organic pollutants (POPs), including polychlorinated biphenyls (PCBs), polyaromatic hydrocarbons (PAHs), polybrominated diphenylethers (PBDEs), and hexachlorocyclohexanes (HCHs). The developed method allows the synthesis of well-shaped nanosized IRMOFs within 1 min at room temperature without the need for any activation procedure or auxiliary stabilizing agents. The IRMOF coated capillary columns offer good separation efficiency that is generally comparable to that of a commercial HP-5MS column for POPs. The IRMOF-1 and IRMOF-3 coated capillary columns gave the theoretical plate values of 2293 and 2063 plates m–1 for naphthalene, respectively, which are slightly smaller than those with a HP-5MS column (2845 plates m–1). The IRMOF-1 coated capillary column offered good resolution for the separation of several intractable PAH isomer pairs, such as anthracene/phenanthrene, benzo[a]anthracene/chrysene, and benzo[b]fluoranthene/benzo[k]fluoranthene, with resolutions of 3.0, 1.1, and 4.1, respectively, which were difficult to be baseline separated on a HP-5MS column with a resolution of 1.0. In addition, the IRMOF-1 and IRMOF-3 coated capillary columns offered a clear group separation of the PCB isomers and a linear range covering three orders of magnitude. The relative standard deviations for the five replicate separations of PAHs were 0.23–0.26% and 2.1–4.5% for retention time and peak area, respectively. The fabricated IRMOF coated capillary columns have been shown to be very promising for the separation of POPs with good reproducibility, high resolution, great selectivity, and a wide linear range.
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PubMed
高影响因子
Advanced Science
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2025
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IF 14.1
Wen Meng,Ting Chen,Xueping Li,Yi Li,Lu Zhang,Yigang Xu,Tianqiang Song,Ji Qi,Qingqing Xiong,Wen Li
The development of efficient therapeutic strategies to promote ferroptotic cell death offers significant potential for hepatocellular carcinoma (HCC) treatment. Herein, this study presents an HCC-targeted nanoplatform that integrates bimetallic FeMoO 4 nanoparticles with CO-releasing molecules, and further camouflaged with SP94 peptide-modified macrophage membrane for enhanced ferroptosis-driven multi-modal therapy of HCC. Leveraging the multi-enzyme activities of the multivalent metallic elements, the nanoplatform not only decomposes H 2 O 2 to generate oxygen and alleviate tumor hypoxia but also depletes glutathione to inactivate glutathione peroxides 4, which amplify sonodynamic therapy and ferroptotic tumor death under ultrasound (US) irradiation. Meanwhile, the nanoplatform catalyzes the Fenton reaction to produce hydroxyl radicals for chemodynamic therapy. Elevated intracellular reactive oxygen species trigger the cascade release of CO, leading to lethal lipid peroxidation and further enhancing ferroptosis-mediated tumor therapy. This nanoplatform demonstrates robust anti-tumor efficacy under US irradiation with favorable biosafety in both subcutaneous and orthotopic HCC models, representing a promising therapeutic approach for HCC. Additionally, the findings offer new insights into tumor microenvironment modulation to optimize US-triggered multi-modal cancer therapy.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Fan Yang,Rui Shu,Bin Li,Wenyu Dai,Wanxi Chen,Jiamin Sun,Ding Bai,Weizhong Yang,Yi Deng
Persistent activation of NLRP3 inflammasomes in infectious diabetic wounds lead to uncontrolled inflammation. Hydrogen sulfide (H 2 S) gas therapy shows promise in inhibiting inflammasomes. However, on-demand delivery of H 2 S is challenging, as its biological characteristics are Janus-faced. Herein, we present the anti-inflammasome bio-heterojunction (AI-bioHJ), comprising FeS, Cu 2 O, and glucose oxidase (GOx), capable of H 2 S gas evolution and in situ self-transformation to accelerate diabetic wound healing. In this system, AI-bioHJ release H 2 S to inhibit NLRP3 inflammasomes and recycle excess H 2 S through a reaction between Cu 2 O and H 2 S, maintaining a low H 2 S concentration while upgrading type I FeS/Cu 2 O to Z-scheme FeS/CuS bioHJ, and markedly enhancing phototherapy. Additionally, GOx depletes local glucose to generate H 2 O 2 , promoting Fenton-like reactions and rapid pathogenic elimination. In vivo and in vitro assessments confirm AI-bioHJ effectively eliminate pathogen, inhibit inflammasomes and facilitate diabetic wound healing. Transcriptome analysis indicates that the FoxO–autophagy axis may mediate the anti-inflammasome effects. Altogether, our work provides enlightenments into programmed H 2 S-releasing bioHJ for remedying diabetic wounds.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Hairui Fang,Jiawei Zhang,Eryang Shang,Hong Chen,Xiao Ma,Xingyu Kang,Huizhang Zhao,Yuxia Liu,Dong Wang
Metal oxides are widely used because of their simple structure, low price, and excellent gas-sensitive properties. But now, the metal oxide sensor faces two challenges. One is that when the detection limit of the sensor is low, it will be affected by a high concentration of gas and fail in practical applications. Second, the metal oxide sensor is susceptible to temperature changes, resulting in inaccurate measurement results. To address the above problems, the performance of metal oxides is enhanced through doping. Indium oxide doped with various levels of indium molybdate was prepared using a two-step hydrothermal method resulting in a composite material with an n-n heterostructure. The interaction formed by the n-n heterostructure enhances the redox reaction between NO 2 gas and the sensor, and the unique nano cluster structure provides more active sites for the sensor, significantly improving the gas performance of the sensor towards NO 2 . Sensors based on In 2 (MoO 4 ) 3 with a doping ratio of 4 % (the sample IM3) showed excellent gas sensitivity. The lower and upper detection limits of the sensor are 200 ppb (response is 1.46) and 150 ppm (response is 515.94), respectively. And the sensor has good resistance to ultra-high concentration (10000 ppm) nitrogen dioxide (NO 2 ) impact. In the range of 130–170°C, the temperature has a small and linear effect on the sensor response, which is very beneficial for temperature correction of gas sensors. The sensor prepared by In 2 (MoO 4 ) 3 doped In 2 O 3 composite material has a good potential for application in engineering practice.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Qingdi Mu,Lujie Sheng,Shuhui Chen,Yuanfa Liu,Maicun Deng,Jizhong Ren
Defect engineering of metal organic frameworks (MOFs) is an emerging effective approach for manipulating their microporosity structure. They are very promising but challenging to achieve significant gas separation performance improvements for mixed matrix membranes (MMMs) fabrication. Herein, we propose a novel thermal induced in-situ defect engineering strategy of ZIF-8 in MMMs by carefully post controlled annealing (above polyimide matrix T g and below ZIF-8 T d ). Attractively, the thermal-triggered polyimide matrix (P84 HT) crosslinking repairs interfacial voids between ZIF-8 and P84 HT. The resulting advanced MMMs exhibit more gas sorption sites and diffusion pathways owing to the missing Zn-N bond of ZIF-8, while exciting enhancement of H 2 /CH 4 and H 2 /N 2 separation performance is obtained compared with the pristine P84 HT membrane. Furthermore, after in-situ defect engineering at 400 °C, the H 2 permeability of the advanced MMMs with 20 wt% ZIF-8 loading is 123.8 Barrer, 19.4 times higher than the pristine P84 HT membrane (6.4 Barrer), while the H 2 /CH 4 and H 2 /N 2 selectivity almost remains essentially unchanged. More importantly, this facile but very effective method demonstrates a new direction to regulate structure of polyimide/MOFs based MMMs for gas separation.
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高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Lei Zhang,Zhen Zhao,Hongming Zhang,Wanli Jiao
To detect trace hydrogen sulfide (H 2 S) safely, more sensitively and less expensively, a new synthesized ZIF-8-derived ZnO-supported Ag nanoparticle assemblies have been investigated. In the successful formation, ZIF-8 was synthesized in room temperature aqueous solution, followed by ultrasonication to produce Ag + /ZIF-8 compounds, and yielded Ag/ZnO assemblies after sintering. Various characterizations have been done to confirm the morphology, surface chemical state and electron distribution by XRD, SEM, XPS, BET and DRIFT. The sensing test results indicate that at an exciting operating temperature of 100 °C, the A-2 labeled sensor exhibits excellent H 2 S detection capabilities, including a response value of 104 for 2.5 ppm H 2 S, the minimum detection limit of 1.1 ppb, satisfied selectivity, significant resilience against humidity and long time stability. More significantly, a valuable test of 140 h real time detection of the H 2 S emission from fresh fish meat has been performed successfully, providing effective data for protein spoilage assessment. Rhombic dodecahedron structure, catalysis of Ag nanoparticles and overflow effect of H 2 S result in the distinct sensing mechanism, providing novel insights and theoretical foundations for developing highly efficient trace H 2 S gas sensors.
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高影响因子
POLYMER INTERNATIONAL
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2024
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IF 2.9
Yong Yang,Jing Shen,Erxun Hu,Yajin Fang,Zhibo Xu,Juan Li
Poly(lactic acid) (PLA) is known as one of the most promising biodegradable polyesters, while inherent brittleness and insufficient gas barrier performance limit its potential application as a film material. Herein, poly[(butylene diglycolate)- co -furandicarboxylate] (PBDF) with excellent flexibility and good gas barrier properties was synthesized and then melt-blended with PLA. Compared with neat PLA, the elongation at break of the PLA/PBDF20 blend increased more than 40 times and reached over 176.7%. In addition, its O 2 , CO 2 and H 2 O permeability coefficients decreased by 21.3%, 50.8% and 46.3%, respectively. Moreover, the PLA/PBDF20 blend also exhibited better biodegradability, with a weight loss rate increasing from 2.7% of neat PLA to 19.0% after 5 weeks of composting. Notably, incorporation of a multifunctional epoxy compatibilizer (Joncryl ADR®-4368) into the PLA/PBDF blends further enhanced their toughness and gas barrier performance, which could be attributed to the improvement of the miscibility between PLA and PBDF. © 2024 Society of Chemical Industry.
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高影响因子
POLYMER
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2024
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IF 4.1
Hongnan Zhang,Taoyuan Liu,Ke Li,Xiaohong Qin
Nowadays, modern industries are rapidly developing, which is caused by a significant amount of high-temperature exhaust gases in the atmosphere, and it contains complex pollutants, formaldehyde, solid particles, and harmful gases that are discharged. For this scenario, the conventional filtering materials are challenged for prevention of high-temperature exhaust gas formaldehyde volatilization because they are composed of metal and inorganic materials caused by oxidation-prone and resilient wear. A recently introduced technique to fabricate composite nanofiber membranes with high strength, modulus, efficiency, low resistance for high-temperature exhaust gas filtering, and its capability to adsorb formaldehyde was discussed in this study. Initially, Polyamide acid (PAA) solution and silicon dioxide (SiO 2 ) nanomicrospheres are used as raw materials for producing electrostatic and thermal imidization Polyimide (PI/SiO 2 ) nanofiber membranes (NFMs) in co-spinning processes. Furthermore, zeoliticimidazolate framework-8 (ZIF-8) was transferred into PI/SiO 2 NFMs and produced the PI/SiO2@ZIF-8 NFM. These findings show that adding SiO 2 nanomicrospheres reduced the fiber packing density as well as air filtration resistance, and PI/SiO2@ZIF-8 NFMs achieve up to 99.703% filtration efficiency and maintain a pressure drop of 178.7 Pa. The weight loss rate is only 4% at temperatures above 300 °C, and the heat resistance is outstanding. Moreover, the PI/SiO2@ZIF-8 NFMs demonstrate a good formaldehyde adsorption performance with a saturation adsorption capacity for formaldehyde within 4 hours of 41.58 mg/g, which is more than 12 times that of the PI/SiO2 NFMs without ZIF-8.
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高影响因子
POLYMER COMPOSITES
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2024
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IF 4.8
Wei Jiang,Xueyan Yun,Jiushi Guo,Jian Hu,Lijun Song,Pengju Pan,Tungalag Dong
Incorporating inorganic particles is a common approach to preparing polymeric materials with desirable physical properties and processability. However, this often results in increased brittleness, necessitating methods to improve melt strength and toughness. In this study, in situ polymerization was employed to functionalize silica nanoparticles with the silane coupling agent (3-aminopropyl) triethoxysilane (APTES) as a core. A flexible chain segment, poly(butylene itaconate) (PBI), was then introduced as a “rubbery” intermediate layer, resulting in a core-shell structure of poly(L-lactic-co-butanediol itaconate) nano-silica copolymer films (PLBI SiO 2 ) with both branched and “rubbery” structures. Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) confirmed the formation of macromolecular chains, with the molecular weight ( M n ) of PLBI increasing from 59,638 to 74,306 g/mol. This significant increase supports the “rubbery” core-shell structure. When 0.5% SiO 2 was added, the T 5% of the film increased by 40°C, significantly improving thermal stability. Additionally, the elongation at break increased to 265.7%, while retaining the original tensile strength. Dynamic rheology experiments further confirmed the generation of branched or “rubbery” core-shell structures, and a doubling of gas barrier properties was observed with increased silica nanoparticles, suggesting potential applications in food packaging or biopharmaceuticals. Highlights Nanocomposites with core-shell structure and improved mechanical properties. Dynamic rheology experiments confirmed the formation of the core-shell structure. Significantly improved gas barrier properties due to core-shell structure.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Junhuan Zong,Guosheng Ai,Dongyin Yan,Yaming Qi,Long Li,Yuanzhu Mi,Yu Ding,Chunyan Zhang,Xuemin Yan
Wax deposition is a common problem in the transportation of gas condensate and crude oil. Polymers are often used as flow improvers to prevent wax agglomeration. In this work, comb-shaped ternary copolymers poly (imidazole olefin-co-ɑ-olefin-octadecyl maleate) with polar groups and non-polar long chains were synthesized through esterification and free radical polymerization. The influences of the monomer molar ratio of imidazole olefin and the dosage of polymers on the flow properties of gas condensate were studied. The mechanism reveals that the copolymers interacted with wax crystals through adsorption and co-crystallization to modify the van der Waals forces and electrostatic forces between the wax crystal molecules, thereby achieving the purpose of inhibiting wax precipitation. Imidazole olefin, ɑ-olefin and octadecyl maleate with a molar ratio of 1:10:10 exhibits optimal flow performance on waxy gas condensate. The pour point and wax appearance temperature of the condensate oil containing 4% on-site wax after being treated with NCMO-2 was reduced by 22 ℃ and 11 ℃, respectively. This work provides a reference for the synthesis of flow improvers for waxy condensate oil.
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高影响因子
危险品化学品经营许可证（带存储）