INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
·
IF 3.9
Zhi Li,Xingyu Chen,Guanran Zhao,Yaohao Guo,Wei Zhao,Linfeng Lei,Zhi Xu
Membrane-based CO2 separation technology is highly desired for natural gas sweetening, and the development of advanced membrane materials with low cost and high CO2/CH4 separation factors under high pressures is the key to the membrane market. Herein, cellulose-derived carbon molecular sieve (CMS) hollow fiber membranes within macropores were constructed by incorporating a thermal labile polymer of poly(vinyl butyral) (PVB). During a controlled carbonization protocol, the spun cellulose membranes formed the CMS membrane matrix, while the PVB formed homogenized macropores. As a result, the generated macropores in the CMS hollow fiber membranes (CHFMs) effectively reduced the gas transport resistance, confirmed by an increased CO2 permeance by ∼2.9-fold from 8.48 to 24.72 GPU (CHFM-1) compared to CHFM-0. Moreover, the membranes were evaluated using a simulated high-pressure natural gas stream (3.44 mol % CO2–87.0 mol % CH4–9.56 mol % N2) and showed good separation performance with a CO2 permeance of 11.66 GPU and a CO2/CH4 separation factor of 38.3 at 30 bar feeding. A long-term durability test over 100 h at 20 bar with a slight decrease in permeance further verified its potential for CO2 removal from high-pressure natural gas.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zimei Zhang,Jing Wei,Min Deng,Lin Yang,Lu Yao,Wenju Jiang,Xuezhong He,Kaifang Wang,Jiali Tang,Bo Tang,Junfeng Zheng,Zhongde Dai
Mixed matrix membranes (MMMs) combine the desirable properties of polymers and inorganic fillers, yet interfacial incompatibility frequently results in non-selective voids that compromise selectivity. Here, we report a straightforward heat treatment (200–400 °C) to enhance interfacial compatibility in MMMs composed of 6FDA-DAM-AB-TFMB polyimide (PI) and two-dimensional zeolite (MFI) fillers. Incorporating porous zeolite fillers increases gas permeability, particularly for polar molecules such as CO 2 , while heat treatment induces crosslinking and polymer chain rearrangement, effectively eliminating non-selective voids and boosting selectivity. Moreover, partial carbonization during the thermal process generates a microporous structure that substantially increases overall gas permeability. Consequently, the MFI/PI-30 % membrane treated at 400 °C achieves exceptional CO 2 and H 2 permeabilities of 2220.8 Barrer (12.7 × higher) and 1767.2 Barrer (10.3 × higher), respectively, while retaining CO 2 /CH 4 and H 2 /CH 4 selectivity—surpassing the 2008 Robeson upper bound. The key innovation of this study is leveraging a moderate-temperature heat treatment that simultaneously mitigates interfacial incompatibility and creates micropores, thereby significantly enhancing both permeability and selectivity. This simple, scalable strategy holds great promise for the development of high-performance MMMs in advanced gas separation applications.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Guangqian Kuang,Huijuan Cao,Xiangyong Zheng,Yishi Lin,Xingmin Jin,Min Zhao,Wenjuan Han
Antibiotics in wastewater present significant ecological risks. However, their effects on nitrogen (N) removal and greenhouse gas (GHG) emissions in constructed wetlands (CWs) have been largely neglected in previous studies. This study investigated the effects of antibiotics on N removal and GHG emissions in earthworm-enhanced CWs constructed with three earthworm densities (0 g m -2 , 156 g m -2 , and 312 g m -2 ). The results showed that (1) antibiotics significantly increased effluent total inorganic nitrogen (TIN) concentrations by 49.17 % in systems with the high-density earthworm, whereas no significant effects were observed in the other treatments; (2) in systems without earthworms, antibiotics significantly reduced N₂O emissions by 139 %. In systems with low-density earthworms, CH₄ and CO₂ emissions were significantly reduced by 366 % and 70.3 %, respectively. In contrast, in high-density earthworm systems, N₂O emissions significantly increased by 289 %; (3) antibiotics led to a significant reduction in non-CO₂ global warming potential (GWP non-CO₂ , -143 %) in the systems without earthworms and a reduction in total global warming potential (GWP CH₄+N₂O+CO₂ , -57.3 %) in the systems with low-density earthworms. However, both indices significantly increased by 289 % and 51.2 % in systems with high-density earthworms; (4) antibiotics altered the microbial community composition and significantly increased nitrite reductase activity in the systems with low-density earthworms (+24.5 %) but significantly decreased it in systems with high-density earthworms (-33.0 %). In summary, antibiotic contamination markedly influenced both N removal performance and GHG emissions in earthworm-enhanced CWs, with effects varying depending on earthworm density.
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JOURNAL OF CELLULAR AND MOLECULAR MEDICINE
·
2021
·Vol. 25
·期 18
·8997-9010
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IF 5.31
Chaoqun Nie,Rentong Zou,Shuang Pan,Rong A,Yunan Gao,Hongxiao Yang,Juncai Bai,Shuiqing Xi,Xue Wang,Xiaojian Hong,Wei Yang
It is noteworthy that prolonged cardiac structural changes and excessive fibrosis caused by myocardial infarction (MI) seriously interfere with the treatment of heart failure in clinical practice. Currently, there are no effective and practical means of either prevention or treatment. Thus, novel therapeutic approaches are critical for the long-term quality of life of individuals with myocardial ischaemia. Herein, we aimed to explore the protective effect of H 2 , a novel gas signal molecule with anti-oxidative stress and anti-inflammatory effects, on cardiac remodelling and fibrosis in MI rats, and to explore its possible mechanism. First, we successfully established MI model rats, which were then exposed to H 2 inhalation with 2% concentration for 28 days (3 hours/day). The results showed that hydrogen gas can significantly improve cardiac function and reduce the area of cardiac fibrosis. In vitro experiments further proved that H 2 can reduce the hypoxia-induced damage to cardiomyocytes and alleviate angiotensin II-induced migration and activation of cardiac fibroblasts. In conclusion, herein, we illustrated for the first time that inhalation of H 2 ameliorates myocardial infarction-induced cardiac remodelling and fibrosis in MI rats and exert its protective effect mainly through inhibiting NLRP3-mediated pyroptosis.
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120692
·
IF 7.2
Xiaojie Huang,Nengwu Zhu,Mingyi Xu,Xiaorong Wei,Fei Li,Yong Jin,Xinyi Liao,Pingxiao Wu
Photosynthetic microbial CO 2 fixation represents an efficient strategy for industrial flue gas mitigation. However, system performance is critically dependent on the gas bubble size within the bioreactor. While large bubbles limit gas-liquid mass transfer, leaving substantial carbon unabsorbed and unconverted, excessively small bubbles can potentially impair microbial viability and activity. In this case, this study systematically investigates the trade-off in flue gas bubble size for carbon fixation by Chlorella pyrenoidosa , specifically elucidating the mechanisms by which fine bubbles impact cellular functions. The use of flue gas bubble with mean diameters of 259, 485, and 653 μm resulted in carbon fixation rates of 0.8651, 1.0175, and 0.7956 g/L/h, respectively. Notably, the peak performance at 485 μm was also associated with the highest levels of protein (59.36 %) and chlorophyll (3.483 %). Mechanistic analysis indicated that 485 μm bubbles provided an optimal balance, enhancing mass transfer compared to larger bubbles while avoiding the severe cell membrane damage and lipid peroxidation induced by exposure to 259 μm bubbles. At this optimal size, carbon metabolism was accelerated through the upregulation of key enzymes (e.g., carbonic anhydrase and RuBisCO) and enhanced energy supply (e.g., NADPH and ATP), whereas 259 μm bubbles caused metabolic suppression. These findings establish bubble size as a decisive factor governing carbon fixation efficiency in photosynthetic biohybrid systems, providing a mechanistic basis for enhancing their efficacy in flue gas mitigation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaolei Cui,Yuchen Cui,Ziang Li,Zixi Kang,Soryong Ryan Chae,Lubomira Tosheva,Hailing Guo
Under industrially conditions (pressures ≥10 bar), polymer membranes usually exhibit poor CO 2 /CH 4 separation performance and limited stability, severely restricting their practical application. Here, we present a materials engineering strategy, in which phenolic resin is in-situ polymerized on the surface of NH 2 -UiO-66 to engineer the MOF-polymer interface, thereby enabling high CO 2 /CH 4 separation performance and excellent structural stability for mixed matrix membranes. The phenolic resin forms a uniform coating (∼10 nm thick) on the porous MOF surface, providing a high-density CO 2 active sites that accelerate CO 2 transport. In addition, due to favorable interfacial interactions between the phenolic resin shell and the polyetherimide matrix, the resulting MMMs exhibit excellent stability under high pressures. Compared to the pristine PEI membranes, the CO 2 permeability and CO 2 /CH 4 selectivity of the optimized 30-RF@NH 2 -UiO-66-PEI membranes are enhanced by 8550% and 1500%, respectively. Under simulated industrial conditions (10/90 CO 2 /CH 4 mixture at 10 bar and 50 °C), the engineered membranes maintain a CO 2 permeability of 6105 Barrer and a CO 2 /CH 4 selectivity of 30.5, demonstrating excellent separation performance. More importantly, the 30-RF@NH 2 -UiO-66-PEI membrane exhibits both scalability (readily extendable to the square-meter level) and cost-effectiveness (∼55 USD per square meter). This work highlights the potential of phenolic resin-modified MOF fillers to enable efficient CO 2 /CH 4 separation under realistic industrial conditions.
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ACS Sensors
·
2025
·
IF 9.1
Mingyue Zhou,Bolong Xu,Dong Wang,Zhaofeng Wu,Lu Zhang,Sheng Cai
Acetone, a key biomarker for metabolic processes, and its excessive levels can cause ketosis or even ketoacidosis, posing significant risks to human health. Therefore, real-time acetone detection is crucial for noninvasive health monitoring. Ti3C2Tx-based sensors demonstrated considerable potential for detecting VOC gases but often face issues with sensitivity and environmental stability. In this work, a flower-like Ti3C2Tx anchored with MoS2 quantum dots (F–Ti3C2Tx/MoS2) was proposed for the first time to achieve accurate acetone detection even under high humidity conditions. The unique flower-like morphology significantly increased the surface area of Ti3C2Tx and amplified its electron scattering effects. MoS2 modification not only reduced the content of Ti defects but also formed a passivation layer, providing a novel approach to address the inherent oxidation issue of Ti3C2Tx. Moreover, the p–n heterojunction between F–Ti3C2Tx and MoS2 promoted charge separation, enabling high-performance acetone detection. Compared with intrinsic Ti3C2Tx, a 4.83-fold enhancement in response to 25 ppm of acetone was achieved by using a F–Ti3C2Tx/MoS2 sensor with an ultralow detection limit of 163.2 ppb and a rapid response/recovery time (26.0 s/33.7 s). When integrated into a portable breath analyzer, the sensor demonstrated accurate acetone monitoring under atmospheric conditions, underscoring its potential for real-time and noninvasive health diagnostics.
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Small
·
2025
·
IF 12.1
Lingyun Xu,Hongyang Liu,Zhihao Zhao,Xiaohan Sun,Weijie Wang,Zhe Chen,Gongmo Xiang,Yupeng Chen,Xiangyu Jiang,Lei Jiang
Conventional gas devices suffer from interfacial impedance limitations, resulting in limited sensitivity and increased power consumption due to their heterogeneous function architecture. Inspired by the uniquely integrated “recognition-transduction” mechanism discovered in insect odorant-binding proteins, 2D nanoconfined ionic membranes are developed through graphene oxide assembly-confined with ionic liquids, achieving monolithic integration of gas recognition and ion transduction. Graphene oxide nanosheets facilitate interlayer gas diffusion pathways, achieving response and recovery times of 10.86 and 13.76 s, respectively. Simultaneously, nanoconfinement enhances directional ion migration, resulting in exceptional NH 3 selectivity, with a theoretical detection limit of 50.14 ppb and a sensitivity of 71.55%/ppm. The gas-ion interaction enhances ion transport by promoting ion dissociation and partially releasing nanoconfinement. Operating at room temperature with an ultralow power consumption of 0.52 µW, this system enables efficient monitoring of fresh food spoilage stages, supporting artificial intelligence-assisted classification. This bioinspired platform provides a new avenue to design integrated olfactory perception systems based on ionic signal transmission to achieve intelligent operation (e.g., food packaging), further promoting the development of living organism-like intelligent systems.
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SPECTROSCOPY LETTERS
·
2025
·
IF 1.6
Qian Yang,Peng Tu,Jiaquan Li,Yanjun Cui,Hui Zhou,Zhilong Jia,Hongxia Bian
Ethylene is a crucial compound extensively utilized across various fields, including industry, agriculture, and ecology. Given its significance, developing a simple and rapid method for detecting ethylene is essential. The first-generation Grubbs catalyst (G-1) was used as a quencher to bind small molecule fluorophores in this study. The synthesized probe was used to detect ethylene based on the olefin metathesis. This method has the advantages of mild reaction conditions and a wide range of functional groups. Based on the above principle, we thoroughly investigated the impact of different substituents on the probe’s detection performance, aiming to inform subsequent modifications of the fluorophore. Overall, our findings propose strategies for optimizing the molecular structure of fluorophores, enabling researchers to enhance ethylene quantification methods across diverse applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Sarula Li,Zheyan Hu,Tianqi Wang,Fang Song,Hong Shao,Feng Li,Xiangting Dong
Triethylamine (TEA) gas is a kind of toxic gas that can lead to health problems. In this work, a novel Janus structure nanofibers (NFs) have been synthesized via a parallel electrospinning method. SnO 2 and In 2 O 3 are selected as the components of the Janus structure and different ratios of SnO 2 and In 2 O 3 in Janus structure are regulated. To investigate its TEA sensing application, gas sensors have been fabricated and the concentration of TEA gas is set at 20 ppm. The gas sensing results indicate that the optimum ratio of SnO 2 to In 2 O 3 is 1:1 and the gas sensors exhibit good sensing performances including a good response (8.45), short response time (4 s), high signal-to-noise ratio (4.45) and stable reproducibility. The improved gas sensing performances can be attributed to the n-n type Janus heterostructure interface. This research may make contributions to the development of semiconductor heterostructure sensing materials and gas sensors.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Xianwen Zhang,Xin Shao,Chen Wang,Hao Peng,Feiyue Cao,Taotao Zhou
In this study, the microstructure of carbon fiber paper is modified through H 3 PO 4 etching to enhance the electrolyzer performance. The effects of different H 3 PO 4 concentrations and different soaking times on the hydrogen evolution reaction are firstly investigated. The electrochemical test results show that the best performance of etched electrodes is achieved at a H 3 PO 4 concentration of 1 M and a soaking time of 12 h, with a significant reduction in charge transfer resistance and overpotential. Subsequently, to explore the change mechanism in electrochemical properties , the microstructure of the carbon paper is investigated using Scanning Electron Microscope (SEM) and Mercury Intrusion Porosimetry (MIP) tests, which show uniformly distributed micropores appear on the surface of the carbon fibers after etching, and the porosity increases from 0.74 to 0.8. Brunauer-Emmett-Teller (BET) tests show that the specific surface area of the carbon paper increases from 0.72 m 2 /g to 4.06 m 2 /g, which effectively increases the interfacial contact area between the catalyst layer and the liquid gas diffusion layer. Furthermore, a 3D multi-physics model is established to further elucidate the impact mechanism of changes in porosity, conductivity, and active specific surface area on the performance of anion exchange membrane electrolyzer, with changes in active specific surface area having the greatest effect.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Zhijia Liao,Zhenyu Yuan,Hongliang Gao,Fanli Meng
In this study, porous sheet-like nanostructured Co 3 O 4 -CuO-CuOHF composites with great n-butanol sensing properties were synthesized by the biotemplate method and hydrothermal method . The effect of various contents of Co 3 O 4 -CuO-CuOHF sensor performance was systematically investigated, in which the best performance was achieved for the composite with 0.03 g Co 3 O 4 addition. The response of the best content Co 3 O 4 -CuO-CuOHF composite sensor to 100 ppm n-butanol at 180 ℃ is 120, which is 8 times higher than that of the CuO-CuOHF sensor. The composite sensor has excellent selectivity for n-butanol and responds 3.75–25 times higher to n-butanol than other target gases. It is detectable up to 500 ppb n-butanol and has potential promise for low concentration detection. Furthermore, it has outstanding stability and resistance to humidity. The gas sensing mechanism was analyzed by UV–visible diffuse reflectance spectroscopy, EPR oxygen vacancies and X-ray photoelectron spectroscopy, which indicated that the abundant oxygen vacancies , the physical adsorption of polar hydroxyl bonds, the electronegative fluorine substitution and the special microstructure of the composite contributed to its gas-sensitive performance.
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