CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shaojian Jiang,Lijun Zhang,Hongjie Yu,Kai Deng,Ziqiang Wang,You Xu,Hongjing Wang,Liang Wang
Two-electron oxygen reduction reaction (2e − ORR) for hydrogen peroxide (H 2 O 2 ) production in acidic solution is becoming a promising synthetic method due to its mild and green process. However, it is still hindered by sluggish kinetics and low selectivity. Given that heterostructure can enhance electron transfer and provide abundant active sites, interface modification can optimize O 2 adsorption configurations and the adsorption energy of the reaction intermediates to improve ORR activity and selectivity. Here, we coupled heterostructures of Ni 0.85 Se-MoSe 2 and polyethyleneimine (PEI) functionalization to enhance the activity and selectivity of the 2e − ORR for the efficient production of H 2 O 2 in acidic solutions. The as-fabricated Ni 0.85 Se-MoSe 2 @PEI performed 91.7 % selectivity of H 2 O 2 in the rotating ring-disk electrode test, while the H 2 O 2 yield rate was up to 3.57 mol g cat. −1 h −1 and the Faraday efficiency was 95.5 % in the H-type cell. In addition, Ni 0.85 Se-MoSe 2 @PEI maintains excellent stability in long-term operation, verifying the practicability of the catalyst. The combination of heterostructure and interface engineering provides research ideas for the electrochemical synthesis of H 2 O 2 .
研究领域:
材料科学
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电化学
·
催化
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产品关联
DOI
高影响因子
Nanomedicine-Nanotechnology Biology and Medicine
·
2025
·
IF 4.6
Xin Bao,Guang Xin,Qilong Zhou,Tao Wang,Xinrui Xu,Lijuan Feng,Chengyu Wan,Fangyuan Jing,Yijiang Liu,Yangbo Liu,Xiaoting Chen,Wen Huang
Acute pancreatitis (AP) is a common inflammatory disease that seriously threatens people's lives and health. Excessive reactive oxygen species (ROS) and cell-free DNA (cfDNA) are significant contributors to the advancement of AP. In this study, a nanoparticle with a dual function to clear ROS and cfDNA was developed for the treatment of acute pancreatitis. Cationic polyethyleneimine (PEI) was used to modify Mn 3 O 4 , resulting in the creation of Mn 3 O 4 -PEI nanoparticles, which exhibited strong binding to cfDNA and the ability to scavenge ROS. In vitro, Mn 3 O 4 -PEI showed significant inhibition of ROS and cfDNA-induced inflammation and demonstrated therapeutic effects in a model of acute pancreatitis induced by sodium taurocholate (STC). This research introduces a new nanomedicine approach for the treatment of AP.
研究领域:
纳米医学
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炎症性疾病
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活性氧清除
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细胞游离DNA靶向
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药物递送
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产品关联
DOI
PubMed
高影响因子
PETROLEUM SCIENCE AND TECHNOLOGY
·
2022
·
IF 1.695
Xiaocan Zhang,Shuangyong Qing,Xuesong Li,Tiantian Li,Ying Zhang
In order to prepare high-performance natural gas dehydration membranes, effects of coagulation bath were studied during a non-solvent-induced phase separation (NIPS) process. Specifically, concentrations of N-methyl-2-pyrrolidone (NMP) and polyethylene glycol 1000 (PEG 1000) were investigated respectively on the structure and properties of polyetherimide (PEI)-PEG1000 blend membranes. Studies have shown that both coagulation baths, namely, NMP and PEG1000, can affect membrane structures and improve the overall separation performance of the blend membranes. The presence of NMP in the coagulation bath formed a dissolution equilibrium with the membrane to modify the membrane structure and slow down the rate of phase separation, and the separation coefficient was 151.8 with 8% NMP. With the increase of PEG1000 concentration in the coagulation bath, the hydrophilicity of the membrane enhanced, and a separation coefficient of 585.7 was reached at 10% PEG1000.
研究领域:
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
FIRE AND MATERIALS
·
2021
·Vol. 46
·期 1
·117-129
·
IF 2.407
Huaqing Wang,Hongqiang Yan,Zhengping Fang
Summary The present work demonstrates a surface pretreatment of reducing assembly layers for flame retardant modification of ramie fabric used by layer-by-layer (LbL) assembly. In order to achieve this goal, low-temperature plasma (LTP) pretreatment was chosen. Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and scanning electron microscope (SEM) were used to confirm the effect of LTP pretreatment on polyethylenimine/ammonium polyphosphate (PEI/APP) flame retardant coating constructed on the surface of ramie fabric using LbL assembly. The thermal property and flame retardancy of PEI/APP coated ramie fabrics were analyzed by TG, LOI, UL94 vertical burning, and cone calorimeter tests. The results indicated that the decomposition rate of ramie fabrics was reduced and the char forming ability at high temperature was improved by PEI/APP coating on the ramie surface. Its LOI increased markedly to 30.6% and ramie fabric achieved self-extinguishing effect. Meanwhile, LTP-O 2 -(PEI/APP) 20 ramie fabric exhibited the low flammability and high fire safety. It was proved that LTP pretreatment under oxygen atmosphere could endow ramie fabric with better flame retardancy due to more PEI/APP adsorbed on its surface. These findings have significant implications for the application of LTP pretreatment to flame retardant modification of ramie fabric by LbL assembly.
研究领域:
材料科學
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紡織工程
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表面改性
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Kexin Tao,Yuning Zhang,Yu Song,Zhiyuan Chen,Yao Wang,Yanxin Wang,Jianguo Tang,Linjun Huang
Water pollution has long been a significant issue, and the purification of dye wastewater plays a crucial role in addressing this problem. Graphene oxide (GO) has found extensive applications in water treatment due to its unique two-dimensional (2D) structure and a surface rich in a large number of oxygen-containing functional groups. We introduced silica(SiO 2 ) and polyethyleneimine(PEI) into GO to prepare a membrane. The experimental findings revealed that the 3-SiO 2 /GO binary composite membrane achieved a high water permeability of 45.6 L m −2 h −1 bar −1 while maintaining retention, which is nearly four times higher than that of the GO membrane (9.85 L m −2 h −1 bar −1 ).The water permeability of the PEI 0.2 -SiO 2 /GO ternary composite membrane achieved 42.37 L m −2 h −1 bar −1 . The rejection rate for methyl orange dye reached 92.36 %, with similar rejection rates all above 95 % observed for other dyes.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yong-Sheng Li,Yi-Wei Gao,Yi-Kun Zhu,Heng Zhang,Wen-Shuang Zhang,Yong-Heng Yin,Yu-Xia Zhang,Chong-Bin Wang
Efficient Mg 2+ /Li + separation is highly demanded to address the global lithium scarcity. The nanofiltration (NF) membrane prepared with PEI-based monomer possess positively charged surface, exhibiting promise potential in lithium extraction from salt lake brines. In this work, water-soluble metal phthalocyanine (PEI@CoPc) was synthesized via grafting reaction between PEI and the (Tetracarboxyphthalocyaninato)cobalt(Ⅱ). The light-responsive NF membrane was prepared via interfacial polymerization technique using the water-soluble PEI@CoPc as aqueous phase monomer alone. This strategic modification significantly enhances the water permeance and Mg 2+ /Li + selectivity of the membrane. The best-performing of PEI@CoPc-TMC/PES membrane shows a water permeance of 16.7 L m -2 h −1 bar −1 and a Mg 2+ /Li + selectivity of 29.5. The membranes exhibited exceptional selectivity towards magnesium ions while maintaining high lithium permeability, offering effective technical support for the efficient extraction of lithium resources from salt-lake brines. Moreover, the distinctive photocatalytic activity of PEI@CoPc can generate active oxidizing species such as superoxide radicals (•O 2 – ) to oxidatively degrade pollutants, conferring the membrane excellent self-cleaning capability. The results indicated that the prepared composite membrane exhibit excellent fouling resistance and self-cleaning performance.
研究领域:
材料科学
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环境工程
·
化学工程
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Jiuqing Liu,Lishun Bai,Junying He,Cheng Wang,Qihou Li,Feifei Song,Zikun Hong,Ya Chen,Fanli Zeng,Chen Cheng,Zehao Chen
Lithium–oxygen (Li–O2) batteries, having an ultrahigh theoretical energy density (3500 Wh kg–1), have gained a lot of attention. However, its application is seriously obstructed by pivotal issues like instability of lithium metal anode, low energy efficiency, and electrolyte decomposition. Herein, a separator modification method based on interfacial polymerization (IP) was proposed by us to solve these issues. The obtained interfacial polymerization layer shows good ion-selective permeability on the surface of the polyetherimide (PEI) separator, and the ion transport of the larger EMIM+, TFSI–, and BF4– between the electrodes is greatly inhibited. Consequently, the representative P2-PEI separator presents the best cycle performance and the Li–O2 battery assembled with it can stably operate over 135 cycles, even under a current density of 0.05 mA cm–2 and a limited specific capacity of 1000 mAh g–1.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Jiaqi Liu,Fuyi Sun,Yuanyuan Che,Kaihuan Nie,Zhihao Zhang,Zhen Yang,Liangliang Lin
Metal organic frameworks (MOFs) have shown widespread applications in many aspects owing to their unique structures. In this study, a thin and homogenous UTSA-280/PEI-HPAN nanofiltration membrane was fabricated by combining interfacial reaction and in-situ self-assembly reaction, which showed rejections of 83.79%, 86.17%, 99.42% and 98.93% for MO, AF, MB and CR solutions together with permeances up to 262.54, 197.51, 145.97 and 170.63 L·m −2 ·h −1 ·MPa −1 , respectively. In addition, the UTSA-280/PEI-HPAN membranes demonstrated a preferable stability in 48 h continuous test, a good anti-fouling property in both HA and BSA fouling test and an outstanding reusability, and they also showed high permeances and rejections even after four cycles. The results indicate that the stable UTSA-280/PEI-HPAN hybrid membrane with high separation performances can be a promising material for wastewater treatment .
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2023
·
IF 2.8
Xu Hongpeng,Zhao Changlu,Hu Tingting,Huang Qi,Jin Bo,Guo Ya,Peng Rufang
Ammonium perchlorate (AP) is a commonly used oxidant for rocket solid propellants. To control the thermal decomposition of AP, a new PEI-imidazole derivative (PEI-ICA) was synthesized. With the combination of Cu compound, the heat decomposition behavior of the AP’s composites was tuned, and the activation energy was also reduced. To explore the potential reason for the catalytic effect, a series of measurements were also carried out, which indicates the electrostatic self-assembly of PEI-ICA and its combination with Cu compound should be responsible for the different heat decomposition behavior of AP. Graphical Abstract
研究领域:
材料科学
·
推进剂化学
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Tianran Zhang,Quanjiang Lv,Siyu Zhang,Mengfan Song,Siyuan Li,Lixue Zhang,Jiping Wang
In polymer dielectric energy storage, even polymers with high glass transition temperatures suffer significant degradation in energy storage performance as temperature increases, primarily due to a sharp rise in electrical conduction loss. In this study, we employ atomic layer deposition to coat the surface of a PEI/PVDF blend film with an Al 2 O 3 inorganic layer to enhance its energy storage performance at high temperatures. The influence of the inorganic layer's thickness on high-temperature energy storage performance is thoroughly analyzed. Experimental results and finite element simulations demonstrate that an ultra-thin Al 2 O 3 inorganic layer with the thickness of 50 nm effectively reduces leakage current density and mitigates space charge accumulation within the PEI/PVDF blends, thereby improving the high-temperature energy storage performance of the blends. Notably, under an applied electric field of 500 MV/m at 150 °C, the PEI/PVDF blend film with 50 nm Al 2 O 3 layer achieved a discharge energy density of 5.45 J/cm 3 and a charge-discharge efficiency of 97.75 %.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2012
·Vol. 15
·期 1
·1-11
·
IF 3.287
Wang Yuanfeng,Xu Feng,Zhang Lei,Wei Xinlin
A one-step strategy for the facile synthesis of polyethyleneimine-functionalized Fe 3 O 4 (Fe 3 O 4 -PEI) composite is presented in this study. We also investigated the effects of reaction time and NaAc on the composite sizes. The composite with good dispersion, wonderful crystallization, and excellent magnetism was obtained through one-pot solvothermal reaction. In the sequential presence of PEI and colloidal gold (Au) solution, plentiful Au nanoparticles with a diameter of 5 nm were assembled on the surface of Fe 3 O 4 –PEI to get Fe 3 O 4 –PEI–Au 1 –PEI–Au 2 (Fe 3 O 4 /Au) composite. In-depth characterization of the composite formation process was performed using transmission electron microscopy, scanning electron microscope, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, vibrating sample magnetometer, and UV–Visible spectroscopy. The Fe 3 O 4 /Au composite was obtained with an average diameter of 150 nm, and the absorption peak was red-shifted to 580 nm. The synthesized Fe 3 O 4 /Au composite, the saturation magnetization of which was 40.4 emu/g, presented good magnetic property. Moreover, the composite could easily combine with up to 890 μg antibodies per mg, and the antibodies still kept good immunocompetence after immobilization. These advantages suggest its great potential for applications in vitro, such as separation and immunoassay.
研究领域:
材料科学
·
纳米技术
·
分析化学
·
生物材料
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Zheng Cheng,Can Chen,Jieyang Huang,Teng Chen,Yang Liu,Xiangyang Liu
The nondestructive functionalization of aramid fiber is an important research direction. In this study, a kind of benzimidazole-contained aramid fiber, Poly- p -phenylene-benzimidazole-terephthalamide (PBIA) fiber, was modified by the coordination of benzimidazole unit in fiber structure with Fe 3+ . Further, the coordinatively unsaturated sites of Fe 3+ endow the modified fiber with active sites for the grafting of PEI. Model compound of PBIA unit, PBA, was utilized to confirm the whole process of modification. In comparison with that of the untreated fiber, the IFSS value of fiber with PEI grafted has an increase by 47%, owing to the chemical bond formed on the fiber/epoxy interface and the better wettability of resin to fiber. In all, the study presents a nondestructive functionalization of aramid fiber and can be employed in the modification of other benzimidazole-contained substrates.
研究领域:
材料科学
·
复合材料
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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）