CATALYSIS LETTERS
·
2025
·Vol. 156
·期 1
·21
·
IF 2.4
Yang Jihui,Shi Minghao,Zheng Jiahao,Zhang Shule,Zhong Qin
Ammonia Selective Catalytic Reduction (NH₃-SCR) is highly effective for nitrogen oxide (NO x ) removal, yet its low-temperature activity remains a key limitation for broader applications. We developed an innovative series of microporous N, O-codoped carbon catalysts (NOAC-x) that facilitate the fast SCR reaction. Results demonstrate that the synergy between catalyst micropore structure and surface functional groups governs denitrification performance: Low-temperature calcination induces pore blockage by nitrogen-containing groups (pyridinic N), reducing specific surface area and weakening NH₃/NO adsorption capacity.Moderate calcinatio promotes partial decomposition of nitrogen groups, optimizing the micropore structure while preserving active sites such as carboxyl groups and pyridinic N, thereby significantly enhancing catalytic activity.High-temperature calcinatio triggers pore collapse and decomposition of active groups, degrading performance.NOAC-600 achieved 95% NO x conversion at 120 °C and exhibited merely a 2% activity decline during a 108-hour stability test. This work provides theoretical guidance for designing microporous N, O-dual-doped carbon-based catalysts and underscores the critical importance of micropore structure and surface chemistry optimization in low-temperature SCR technology. Graphical
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DOI
高影响因子
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
·
2022
·Vol. 106
·期 24
·8053-8066
·
IF 5.56
Li Meijie,Wen Qifeng,Lv Shuzhe,Yang Rumeng,Cheng Tao,Wang Zhaobao,Yang Jianming
Abstract
β-Elemene is the major component of a traditional Chinese medicine ( Rhizoma Curcumae ) for cancer treatment, and plant extraction is the major methods currently. Biosynthesis of β-elemene is a promising and attractive route due to its advantages, including environmentally friendly processes, renewable resources, and sustainable development. In this research, biosynthesis of germacrene A, direct precursor of β-elemene, in Escherichia coli was successfully performed and 11.99 mg/L germacrene A was obtained. Thereafter, a cobiosynthesis system for germacrene A and lycopene, another kind of isoprenoid, was constructed. Furthermore, the cultivation conditions were optimized. The germacrene A production was increased to the highest level reported to date, 364.26 mg/L, threefold increase to the strain with only germacrene A production. The cobiosynthesis system was suggested to promote the metabolic flux for germacrene A production. This research enabled germacrene A production in E. coli , and it highlights the promoting mechanism of the cobiosynthesis system for two chemicals which are both belonging to isoprenoids. Key points
• Co-production of germacrene A and lycopene in E. coli. • Promoting mechanism of cobiosynthesis of two isoprenoid compounds in E. coli. • Shake-flask production of germacrene A reached to the highest 364.26 mg/L in E. coli.
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PubMed
高影响因子
npj Flexible Electronics
·
2022
·Vol. 6
·期 1
·1-9
·
IF 12.019
Wang Ziya,Xu Xiuru,Xu Yingtian,Lin Waner,Peng Zhengchun
Epidermal sensing devices, which mimic functionalities and mechanical properties of natural skin, offer great potential for real-time health monitoring via continuous checking of vital signs. However, most existing skin-mounted electronics use a flexible film with high elastic modulus, which hinders physical activity and causes interfacial delamination and skin irritation. The compliance of hydrogel-based devices can firmly conform to complex, curved surfaces without introducing excessive interfacial stresses. However, most hydrogels still suffer from the weakness of stable and reproducible sensing. In this work, we report a skin-friendly epidermal electronic made of a resilient, self-healing, and recyclable polyvinyl alcohol (PVA) hydrogel. The hydrogel is reinforced through a ternary heterogeneous network for good mechanical robustness while maintaining high stretchability and exceptional conformability. Simultaneously, the abundant dynamic hydrogen bonds give the hydrogel rapid self-healing ability. The assembled hydrogel epidermal electronic is able to stably monitor multiple physiological signals as well as sense the strain level of the skin motion and joint bending. The unique, versatile, environmental and biological friendly epidermal electronics will have broad applications in health care, human-machine interface, augmented reality, and so on.
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高影响因子
Food and Bioprocess Technology
·
2024
·
IF 5.3
Cui Yan,Zhu Lin,Shang Haitao,Xuan Xiaoting,Lin Xudong
The combined application of high hydrostatic pressure (HHP) and natural antimicrobials is a promising alternative for fish preservation. In this study, microbial qualities, physicochemical properties, taste active, and volatile flavor compounds of large yellow croaker ( Larimichthys crocea ) following combined ε-polylysine (PL) and HHP (PL-HHP) treatment (200, 250, and 300 MPa for 10 min, 20 °C) were investigated and compared to the fresh and PL samples. PL and HHP acted synergistically to give higher inactivation of microorganisms, with the total viable count, Pseudomonas , H 2 S-producing, and coliform bacteria counts even undetectable under the PL-HHP treatment at 300 MPa. PL-HHP treatment had no significant effects on the surface color and lipid oxidation levels. However, the muscle color changed obviously in the PL-HHP samples at ≥ 250 MPa ( p < 0.05), showing a distinct cooked appearance. Samples treated with PL-HHP showed better texture quality, and the maximum resilience and water-holding capacity were observed with the PL-HHP treatment at 200 MPa. The degree of myofibrillar protein denaturation increased by PL-HHP treatment with the elevated pressure. Significant elevations in 5′-nucleotides, free amino acids, and equivalent umami concentration levels were observed in the PL-HHP treated samples ( p < 0.05). Furthermore, PL-HHP treatment exhibited a significant impact on the volatile flavor compounds of fish fillets, with significantly higher concentrations of alcohols, aldehydes, and ketones compared to the fresh and PL samples ( p < 0.05). These findings show that PL-HHP treatment can be an effective alternative for the preservation and processing of large yellow croaker, offering new insights into developing safe aquatic products with enhanced taste and flavor profiles.
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高影响因子
International Journal of Minerals Metallurgy and Materials
·
2024
·Vol. 31
·期 10
·2263-2273
·
IF 5.6
Lu Dongfei,Xi Guoqiang,Li Hangren,Tu Jie,Liu Xiuqiao,Liu Xudong,Tian Jianjun,Zhang Linxing
BiFeO 3 (BFO) has received considerable attention as a lead-free ferroelectric film due to its large theoretical remnant polarization. However, BFO suffers from a large leakage current, resulting in poor ferroelectric properties. Herein, the sol–gel method was used to deposit a series of BFO-based thin films on fluorine-doped tin oxide substrates, and the effects of the substitution of the elements Co, Cu, Mn ( B -site) and Sm, Eu, La ( A -site) on the crystal structure, ferroelectricity, and leakage current of the BFO-based thin films were investigated. Results confirmed that lattice distortion by X-ray diffraction can be attributed to the substitution of individual elements in the BFO-based films. Sm and Eu substitutions contribute to the lattice distortion in a pseudo-cubic structure, while La is biased toward pseudo-tetragonal. Piezoelectric force microscopy confirmed that reversible switching of ferroelectric domains by nearly 180° can be realized through the prepared films. The ferroelectric hysteresis loops showed that the order for the polarization contribution is as follows: Cu > Co > Mn ( B -site), Sm > La > Eu ( A -site). The current density voltage curves indicated that the order for leakage contribution is as follows: Mn < Cu < Co ( B -site), La < Eu < Sm ( A -site). Scanning electron microscopy showed that the introduction of Cu elements facilitates the formation of dense grains, and the grain size distribution statistics proved that La element promotes the reduction of grain size, leading to the increase of grain boundaries and the reduction of leakage. Finally, a Bi 0.985 Sm 0.045 La 0.03 Fe 0.96 Co 0.02 Cu 0.02 O 3 (SmLa-CoCu) thin film with a qualitative leap in the remnant polarization from 25.5 (Bi 0.985 Sm 0.075 FeO 3 ) to 98.8 µC/cm 2 (SmLa-CoCu) was prepared through the synergistic action of Sm, La, Co, and Cu elements. The leakage current is also drastically reduced from 160 to 8.4 mA/cm 2 at a field strength of 150 kV/cm. Thus, based on the increasing entropy strategy of chemical engineering, this study focuses on enhancing ferroelectricity and decreasing leakage current, providing a promising path for the advancement of ferroelectric devices.
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高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2024
·Vol. 43
·期 1
·177-187
·
IF 4.1
Wu Hao-Min,Ma Wen-Can,Cai Yi-Feng,Huang Xin,Li Jun-Heng,Kai Xi,Zhang Qiu-Hong,Jia Xu-Dong
Solid-state electrolytes are considered to be the vital part of the next-generation solid-state batteries (SSBs), due to their high safety and long operation life span. However, the two major factors that impede the expected performance of batteries are: the easy formation of lithium dendrites due to the concentration gradient of anions, and the low ionic conductivity at room temperature, which prevents reaching ideal electrochemical performance. Single-ion quasi-solid-state electrolytes (SIQSSEs) could provide higher safety and energy density, owing to absence of anion concentration gradient and solvent, as well as good lithium-ion transport ability. The porous covalent organic frameworks (COFs) are beneficial for con-structing appropriate lithium-ion transport pathway, due to the ordered 1D channel. In addition, the boroxine COFs (COF-5) offers strong ability of withdrawing anion part of lithium salt. Last but not the least, boron atom could play the role of coordinate site due to its electron deficiency. These advantages afford an opportunity to obtain a SIQSSE with high ionic conductivity and high lithium transference number (LTN) simultaneously. The COF-5 based SIQSSEs delivered a high ionic conductivity of 6.3×10 −4 S·cm −1 , with a high LTN of 0.92 and a wide electrochemical stable window (ESW) of 4.7 V at room temperature. The LiFePO 4 (LFP)/Li cells, which was assembled with COF-5 based SIQSSE, exhibited outstanding long cycle stability, high initial capacity and favorable rate performance. The results indicated COFs could be an ideal material for single-ion solid-state electrolytes in next-generation batteries.
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高影响因子
International Journal of Minerals Metallurgy and Materials
·
2024
·Vol. 32
·期 1
·111-118
·
IF 5.6
Wang Xiaoxiao,Huang Qingsong
Densely distributed coherent nanoparticles (DCN) in steel matrix can enhance the work-hardening ability and ductility of steel simultaneously. All the routes to this end can be generally classified into the liquid–solid route and the solid–solid route. However, the formation of DCN structures in steel requires long processes and complex steps. So far, obtaining steel with coherent particle enhancement in a short time remains a bottleneck, and some necessary steps remain unavoidable. Here, we show a high-efficiency liquid-phase refining process reinforced by a dynamic magnetic field. Ti–Y–Mn–O particles had an average size of around (3.53 ± 1.21) nm and can be obtained in just around 180 s. These small nanoparticles were coherent with the matrix, implying no accumulated dislocations between the particles and the steel matrix. Our findings have a potential application for improving material machining capacity, creep resistance, and radiation resistance.
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高影响因子
Collagen and Leather
·
2024
·Vol. 6
·期 1
·1-12
·
IF 0
Wei Wenyu,He Manman,Ma Jianrui,He Huixia,Liu Peng,Xiao Jianxi
Proteases, such as trypsin, are essential for extracting collagen in various industrial applications. The potential applications of rare earth nanomaterials, specifically yttrium nanoparticles, have attracted significant interest across various fields due to their distinctive characteristics, including high dielectric constant and thermal stability. Biomineralization has emerged as a promising approach to synthesize protein-inorganic nanomaterials with hierarchical structures and desired functions. In the present investigation, a novel protease-templated biomineralization strategy was developed for synthesizing protease-(NH 4 ) 2 Y 3 F 11 •H 2 O hybrid nanomaterials using a one-pot method under very mild conditions. For modifying the morphologies of (NH 4 ) 2 Y 3 F 11 •H 2 O throughout biomineralization, protease has been demonstrated to be a highly promising biotemplate. Protease was utilized as a template for morphological control in the biomineralization procedure, which resulted in a gradual transformation of the initially formed (NH 4 ) 2 Y 3 F 11 •H 2 O octahedral structures into uniform nanospheres. The applicability of this approach was supported by successfully utilizing various proteases to synthesize protease-(NH 4 ) 2 Y 3 F 11 •H 2 O hybrid nanospheres. In addition to a strong and desirable luminescent signal, these hybrid nanospheres demonstrated extensive recycling because of their high enzymatic activity, stability and durability. The protease-mediated biomineralization approach offers an easy and robust approach to develop innovative protease-inorganic composites. Its moderate reaction conditions and simple operation render it a viable tool for developing stable and reusable enzyme reactors in various industrial applications. Graphical Abstract
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DOI
Systems Microbiology and Biomanufacturing
·
2023
·
IF 0
Sun Tingting,Liu Di,Zhang Linmeng,Fan Taiping,Cai Yujie
(2R,3R)-BDO is an important bio-based four-carbon platform compound and widely used in chemical, food, pharmaceutical, fuel and aerospace fields . Serratia marcescens has been shown to be an effective strain for producing BDO. However, there have been few reports on the metabolic engineering of this strain to efficiently produce (2R,3R)-BDO using xylose. In this study, the endogenous strong promoter was screened and modified, and combined with the screened RBS. (2R,3R)-BDO was successfully produced by combining the selected promoters and RBS with the overexpressed key enzymes (ALS, ALSD, BDH, GLF) of (2R,3R)-BDO production. The optimum fermentation temperature and pH were 37 ℃ and 6.0, respectively, and the optimized yield reached 6.0 g/L. After batch fermentation, the (2R,3R)-BDO yield reached 36.6 g/L. This provided a good idea for efficient production of (2R,3R)-BDO from xylose.
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DOI
Friction
·
2022
·Vol. 11
·期 4
·513-523
·
IF 4.924
Gao Tianyang,Li Jinjin,Wang Weiqi,Luo Jianbin
An extremely low friction state was observed on the gold surface induced by applying a specific negative potential in cationic surfactant solution. The friction force showed a remarkable reduction from 8.3 to 3.5 × 10 −2 nN (reduced by 99.6%) with increasing the period of negative applied potential, and the final friction coefficient could reduce down to 3 × 10 −4 . The extremely low friction state was robust, and it also exhibited an excellent load bearing capacity, which cannot be damaged by a high load. Moreover, the extremely low friction state achieved under negative applied potential could keep stable even after the removal of potential, but failed in a short time, once a specific positive potential was applied. It was demonstrated that there was a stable electro-adsorption of surfactant molecules on the gold surface induced by applying a negative potential, leading to the formation of a bilayer structure on the gold surface. The hydration layers of the bilayer on the gold surface and micelles on the silica probe provided a shear plane with an extremely low shear strength, leading to the extremely low friction state on the gold surface. This study provides a method to achieve extremely low friction state by applied potential.
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高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-12
·
IF 3.8
Li Chao,Xiong Zhen,Han Jinxin,Nian Weiqi,Wang Zheng,Cai Kailin,Gao Jinbo,Wang Guobin,Tao Kaixiong,Cai Ming
Gastric cancer (GC) is one of the most common and deadliest cancers worldwide. Lipid homeostasis is essential for tumour development because lipid metabolism is one of the most important metabolic reprogramming pathways within tumours. Elucidating the mechanism of lipid homeostasis in GC might significantly improve treatment strategies and patient prognosis. GSE62254 was applied to construct a lipid homeostasis-related gene signature score (HGSscore) by multiple bioinformatic algorithms including weighted gene coexpression network analysis (WGCNA) and LASSO-Cox regression. A nomogram based on HGSscore and relevant clinical characteristics was constructed to predict the survival of patients with GC. TIMER and xCell were used to evaluate immune and stromal cell infiltration in the tumour microenvironment. Correlations between lipid homeostasis-related genes and chemotherapeutic efficacy were analysed in GSCAlite. RT‒qPCR and cell viability assays were applied to verify the findings in this study. HGSscore was constructed based on eighteen lipid homeostasis-related genes that were selected by WGCNA and LASSO-Cox regression. HGSscore was strongly associated with advanced TNM stage and showed satisfactory value in predicting GC prognosis in three independent cohorts. Furthermore, we found that HGSscore was associated with the tumour mutation burden (TMB) and immune/stromal cell infiltration, which are related to GC prognosis, indicating that lipid homeostasis impacts the formation of the tumour microenvironment (TME). With respect to the GSCAlite platform, PLOD2 and TGFB2 were shown to be positively related to chemotherapeutic resistance, while SLC10A7 was a favourable factor for chemotherapy efficacy. Cell viability assays showed that disrupted lipid homeostasis could attenuate GC cell viability. Moreover, RT‒qPCR revealed that lipid homeostasis could influence expression of specific genes. We identified a lipid homeostasis-related gene signature that correlated with survival, clinical characteristics, the TME, and chemotherapeutic efficacy in GC patients. This research provides a new perspective for improving prognosis and guiding individualized chemotherapy for patients with GC.
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2024
·Vol. 39
·期 6
·1337-1347
·
IF 1.3
Yue Song,Gong Lunjun,Yang Tonghui,Hu Weida,Liu Xiaopan,Gao Pengzhao,Xiao Hanning
We took Co 0.2 Ni 0.8 -MOF-74 with bimetallic synergistic effect as the basic material, and selected rare earth ions Ho, Gd, and Er with ion radii close to Co and Ni as the research objects for doping. The influence of rare earth ion doping amount and doping type on the eNRR performance of the catalyst was explored. The experimental results show that the ammonia yield rate and Faraday efficiency doped with Co 0.2 Ni 0.8 -MOF-0.5Ho are the highest, reaching 1.28 × 10 −10 mol·s −1 ·cm −2 /39.8%, which is higher than the 1.12 × 10 −10 mol·s −1 ·cm −2 /32.2% of Co 0.2 Ni 0.8 -MOF-74, and is about 14.3%/23.7% higher than that without doping, respectively. And the stability of Co 0.2 Ni 0.8 -MOF-0.5Ho is good(after 80 hours of continuous testing, the current density did not significantly decrease). This is mainly due to doping, which gives Co 0.2 Ni 0.8 -MOF-74 a larger specific surface area and catalytic active sites. The catalyst doped at the same time has more metal cation centers, which increases the electron density of the metal centers and enhances the corresponding eNRR performance.
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高影响因子
危险品化学品经营许可证（带存储）