ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Ying Xiong,Yumei Zhao,Xingkun Qi,Jiayi Qi,Yuanyuan Cui,Haibiao Yu,Ying Cao
In this paper, Gd-promoted Co3O4 catalysts were prepared via a facile coprecipitation method for low-temperature catalytic N2O decomposition. Due to the addition of Gd, the crystallite size of Co3O4 in the Gd0.06Co catalyst surprisingly decreased to 4.9 nm, which is much smaller than most additive-modified Co3O4 catalysts. This huge change in the catalyst’s textural structure endows the Gd0.06Co catalyst with a large specific surface area, plentiful active sites, and a weak Co–O bond. Hence, Gd0.06Co exhibited superior activity for catalyzing 2000 ppmv N2O decomposition, and the temperature for the complete catalytic elimination of N2O was as low as 350 °C. Meanwhile, compared with pure Co3O4, Ea decreased from 77.4 to 46.8 kJ·mol–1 and TOF of the reaction increased from 1.16 × 10–3 s–1 to 5.13 × 10–3 s–1 at 300 °C. Moreover, Gd0.06Co displayed a quite stable catalytic performance in the presence of 100 ppmv NO, 5 vol % O2, and 2 vol % H2O.
研究领域:
催化化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Shao-hua Luo,Ge Wang,Guodong Hao,Xinru Tian,Liu Yang,Sheng-xue Yan
Na x Ni 1/3 Fe 1/3 Mn 1/3 O 2 cathode material with high stability and high capacity is favored by researchers. However, during the charge-discharge process, Na x Ni 1/3 Fe 1/3 Mn 1/3 O 2 undergoes a series of complex phase transitions, which lead to the attenuation of its electrochemical performance and severely limit its application. In this paper, a series of Na x Ni 1/3 Fe 1/3 Mn 1/3 O 2 (0.6 ≤ x ≤ 1.0) cathode materials are synthesized by the high-temperature solid-state method, and the influence of varying sodium contents on the structure, Na occupancy, and various performance of the materials is analyzed. The results indicate that all four samples are P2 phase. However, they have different sodium sites (directly under the transition metal element (Na f ) and directly under the gap of the three transition metal elements (Na e )) occupancy. It is found that the Na f to Na e ratio of Na 0.9 Ni 1/3 Fe 1/3 Mn 1/3 O 2 material is 0.55, at which time Na f /Na e is lower and the electrochemical performance is the best. Its initial discharge specific capacity is 112mAg −1 , and after the multiplicative performance test, the discharge specific capacity is 95.7mAg −1 . The study shows that by adjusting the initial sodium content, the occupancy rate of different sodium sites is changed, which significantly affects the morphology, capacity, and cycling stability of the material.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Fangfang Dong,Shengrui Cui,Chengliang Lin,Xin Wan,Ning Wang,Xiang Huang,Wei Liu,Yongcheng Jin
The insufficient structural stability of high-voltage spinel cobalt-free LiNi 0.5 Mn 1.5 O 4 (LNMO) throughout the cycling process hinders its widespread application. To address these issues, we incorporate elemental iodine into LNMO during the precursor preparation process using an ethanol-assisted hydrothermal method and successfully modify the bulk and interface coating structure of LNMO-3% I 2 . The incorporation of iodine not only induces the formation of a cavity and fast lithium-ion transfer pathway within the particles but also facilitates the development of a thin LiI coating layer on the surface of cathode materials. Compared with bared LNMO, LNMO-3% I 2 exhibits a capacity retention of 90.31% following 500 cycles at 1C and a capacity retention of 88.74% even following 450cycles at a high-rate of 50C. Furthermore, the cells with LNMO-3% I 2 demonstrate an excellent electrochemical performance under both high temperatures of 40 ℃ and low temperatures of −15 ℃. This study offers valuable insights into the simultaneous optimization of internal and external structures in cathode materials, thereby enhancing the long-term cycling performance of high-voltage lithium-ion batteries.
研究领域:
材料科学
·
电化学
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能源存储
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DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Xin Wan,Yanyun Zhang,Fangfang Dong,Ning Wang,Congyi Hao,Xiang Huang,Wei Liu,Yongcheng Jin
O3-type layered oxide materials are considered one of the most promising cathode materials for sodium-ion batteries due to their high capacity. However, the structural evolution of the O3-type layered oxide during cycling is more complex, exhibiting poorer structural reversibility. In order to achieve a high electrochemical performance of O3-type sodium-ion cathode materials, we adopted a high-entropy strategy to realize multielement codoping of Mg, Co, and Ti into the transition metal layer of O3-type NaNi0.4Fe0.2Mn0.4O2 and prepared a high-entropy cathode material of NaNi0.35Mg0.05Fe0.15Co0.05Mn0.35Ti0.05O2 (NMFCMT-2). The transition metal layer doped with multiple elements Mg, Co, and Ti not only stabilizes the crystal structure and widens the layer spacing but also weakens the Na–O bonding, thereby facilitating sodium-ion diffusion and mitigating volume changes during the charge–discharge process. In situ XRD results show that this strategy can delay the phase transition of O3–P3 and realize the phase transition of P3–O3 in advance during the discharge process so that NMFCMT-2 can maintain the O3 phase to a greater extent during the cycles. The results show that the capacity retention rate was 80.6% after 200 cycles at 1C and 88.6% after 200 cycles at 5C. In addition, its high voltage cycling stability is also significantly improved compared to the pristine NaNi0.4Fe0.2Mn0.4O2.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Jiahua Mo,Pengfei Yuan,Sheng Chang,Lingzi Xiao,Guangxue Chen
In this study, by introducing melamine into the layered structure of ginkgo shells, both the internal structure was altered and nitrogen atoms were introduced, thereby achieving a dual effect of nitrogen doping and structural modification. The study demonstrated that the combined use of melamine and ZnCl 2 successfully enhanced the electrochemical performance of the material. The optimized material GKN-1.5 has a relatively low specific surface area (332.23 m 2 g −1 ), but its proportion of mesopores and average pore size (5.77 nm) are both higher than those of GK (954.13 m 2 g −1 , 4.46 nm). Additionally, the nitrogen content of GKN-1.5 is 13.73 %, while that of GK is 3.46 %, indicating that nitrogen atoms have been successfully introduced into the resulting material. When assembled into a lithium-ion battery, GKN-1.5 exhibited a charging capacity of 594.75 mAh g −1 and a discharging capacity of 1030.35 mAh g −1 during the first charge-discharge cycle, with an initial coulombic efficiency of 57.72 %, compared to GK (348.38 mAh g −1 , 929.24 mAh g −1 , 37.47 %). Additionally, in cycling performance tests, GKN-1.5 maintained a reversible capacity of 678.05 mAh g −1 after 200 cycles at a current density of 100 mA g −1 . In contrast, GK exhibited a reversible capacity of 370.83 mAh g −1 at the same current density. This study proposes a method for modifying the natural structure of biomass while introducing heteroatoms.
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DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Shanshan Li,Shiqin Peng,Lin Wei,Jingyan Li,Yuanyuan Lu,Xiaobin Ma,Fuliang Hu
In this study, whey protein isolate was conjugated with polyphenols via free radical reactions, using ultrasound treatment to enhance the bio-functional properties of the resulting conjugates. Ultrasound at 270 W for 20 min significantly improved the degree of conjugation compared to the traditional free radical method, as evidenced by higher levels of total phenolic and flavonoid content. Structural analysis revealed that the conjugates produced with ultrasound exhibited reduced α-helix content but increased β-turn and random coil structures, along with enhanced fluorescence intensity and surface hydrophobicity. Furthermore, the incorporation of ultrasound in the conjugation process significantly enhanced antioxidant activity and functional properties ( p < 0.05), including thermostability, water solubility and emulsifying stability. These results highlight the potential of ultrasound-assisted conjugation to enhance protein-polyphenol interactions, opening new possibilities for applications in the food industry.
研究领域:
食品科学
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生物技术
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生物化学
·
超声学
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产品关联
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Yulan Jian,Shuai Chen,Dennis W. Hess,Mengke Huang,Hengyi Zhang,Jiankun Liang,Linkun Xie
The widespread application of fast-grown timber species is hindered by their high susceptibility to water absorption, poor dimensional stability, and inadequate mechanical strength. In this study, poplar wood underwent a sequential impregnation process with methyltrimethoxysilane (MTMS) and an ammonia-ethanol mixture. This combined treatment allowed silane cross-linking with cell walls while also filling wood cavities, promoting the in-situ growth of nanoparticles. After the impregnation process, a subsequent surface treatment with methyltrichlorosilane (MTCS) was then performed to establish a hydrophobic surface layer. Through structural and surface modification, a novel double-layer hydrophobic system was constructed to enhance water resistance. The modified wood exhibits a surface water contact angle of 153.6° ± 0.5° and a 10-mm depth contact angle of 112.8° ± 0.6°, illustrating the effectiveness of the dual-layer hydrophobic structure. Compared to the control wood, the modified samples exhibited a 65.6 % reduction in 24 h water absorption and a 48.4 % decrease in volume swelling. Additionally, cross-linking and lumen filling considerably improved the mechanical properties of the modified wood. The double-layer hydrophobic system shows significant potential to extend the service life of wood and enhance its mechanical performance, paving the way for broader applications in moisture-sensitive environments.
研究领域:
材料科学
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木材科学与技术
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Shi-Ye Luo,Jia-Li Tao,Yan-Xiang Bi,Hong-Wei Xiao,Hua-Lei Chen,Xiang-Xin Li,Yin-Chen Wang,Xiao-Ming Fang
Crystallization degrades the physicochemical properties of honey and reduces consumer acceptance. To address this issue, radiofrequency was developed to investigate the decrystallization efficiency and quality impact mechanism of rape honey. The results showed that radiofrequency significantly decreased the number and size of crystals, leading to shortening the decrystallization time to less than 10 min. The response surface optimization methodology further indicated that the highest decrystallization rate (98.72 ± 0.34 %) and lower 5-Hydroxymethylfurfural (2.45 ± 0.12 mg/kg) contents were obtained. Furthermore, radiofrequency changed the honey from a pseudoplastic into a Newtonian fluid efficiently due to the volumetric heating feature. It is worth noting that the inactivation of glucose oxidase reduced the antibacterial capacity, while the increase in total phenolic and flavonoid contents improved the antioxidant capacity of rape honey. In summary, current findings indicated that radiofrequency is a potential alternative decrystallization technology for water baths.
研究领域:
食品科学
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化学
·
农业
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Zeguang Yin,Ke Wang,Pengfei Zhao,Xiaoli Tang
The water hydration and subsequent calcination (denoted as hydration–calcination) technique was used to modify the microstructure of lithium orthosilicate (Li4SiO4) prepared by solid-state reactions. The original and modified Li4SiO4 sorbents were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption, scanning electron microscopy, and thermogravimetric analysis. The cyclic capacity of these sorbents was further examined using a dual fixed-bed reactor. After treatment by water hydration, most of the Li4SiO4 transformed into LiOH and Li2SiO3. Moreover, following subsequent calcination, the sample exhibited a looser structure with a smaller particle size compared with the original Li4SiO4. This favorable structure was responsible for improved CO2 chemisorption properties, as measured by a higher capacity, faster absorption kinetics, and improved stability.
研究领域:
材料科学
·
无机化学
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能源化学
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环境化学
·
吸附分离技术
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DOI
高影响因子
Gels
·
2025
·Vol. 11
·期 9
·725
·
IF 5.3
Lingyu Han,Yulong Zhang,Bing Hu,Ying Zhang,Jijuan Cao,Jixin Yang,Saphwan Al-Assaf
Fish skin gelatin (FG) has garnered considerable attention as a potential substitute for mammalian gelatin. In this study,Takifugu rubripesskin gelatin was chemically modified using transglutaminase (TG) and epigallocatechin gallate (EGCG). Subsequently, the rheological, structural, and physicochemical properties of FG modified with varying concentrations of TG and EGCG were systematically examined and compared. As the concentrations of TG and EGCG increased, more extensive interactions occurred in FG, leading to a significant enhancement of gelatin properties. Following modification, the molecular weight of FG proteins increased, and this was accompanied by enhanced surface hydrophobicity and gel strength. Rheological analysis further demonstrated that the viscosity of FG modified with TG and EGCG was higher than that of unmodified FG and was positively correlated with the treatment concentrations of TG and EGCG. Additionally, the results indicated that the effect of TG modification was more pronounced than that of EGCG modification. Overall, this study demonstrates that both TG and EGCG modifications can effectively overcome the inherent limitations of fish skin gelatin, with TG showing superior efficiency as a cross-linking agent. The enhanced thermal stability, gel strength, and rheological properties achieved through these interactions significantly expand the potential applications of fish gelatin in the food industry, making it a more viable alternative to mammalian gelatin.
研究领域:
食品科学
·
高分子化学
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生物技术
·
材料科学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Taotao Sun,Wenlin Shuai,Shiwei Wang,Hongfeng Yin,Yiming Li,Jie Zhang,Xuemin Yuan,Xiaolong Yu
Coal water slurry (CWS) modified with traditional linear naphthalene sulfonate formaldehyde (NSF) polymers exhibited limited stability in long-haul pipeline transportation, because of low steric hindrance energy (V S ) between coal particles. To study the effect of structural modification of dispersant on the V S value, a branched multi-arm poly(sodium acryloyloxy-2-naphthalenesulfonate) (Ma-PANS) dispersant was synthesized by controlled/living radical polymerization (CRP), using vinyl monomer sodium acryloyloxy-2-naphthalenesulfonate (ANS) with triple functional groups as precursor. The making-slurry experiment results showed that the viscosity of Yulin CWS modified with Ma-PANS dropped 319 mPa·s, and its stability was remained at 100% after 30 days. The effects of the structural modification on adsorption amount, adsorption parameters and adsorption conformation were also analyzed by adsorption experiments and molecular dynamics (MD) simulations. The results showed that the specific conformation of Ma-PANS contributed to improving adsorption parameters. This reduced the diffusion rate of dispersant on coal surface, resulting in enhanced stability of slurry. Moreover, the numerical calculation results based on the extended Derjaguin-Landau-Verwey-Overbeek theory (eDLVO) showed that the enhancements on dispersion and stability were attributed to the structure of dispersant being changed from linear to multi-arm. The unique multi-arm structure brought significant increase in the V S value when impeding the approach among particles and disrupting flocculation, thus effectively enhanced dispersion and stability of CWS.
研究领域:
材料科学
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高分子化学
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胶体与界面科学
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能源工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xiangyu You,Fang Hou,Tianzhu Xie,An Cai,Hongwei He,Guozhu Li,Fengbao Zhang,Wenchao Peng,Xiaobin Fan,Yang Li
Hypothesis Electrochemical manufacture of H 2 O 2 through the two-electron oxygen reduction reaction (2e – ORR), providing prospects of the distributed production of H 2 O 2 in remote regions, is considered a promising alternative to the energy-intensive anthraquinone oxidation process . Experiments In this study, one glucose-derived oxygen-enriched porous carbon material (labeled as HGC 500 ) is developed through a porogen-free strategy integrating structural and active site modification. Findings The superhydrophilic surface and porous structure together promote the mass transfer of reactants and accessibility of active sites in the aqueous reaction, while the abundant C O species (e.g., aldehyde groups) are taken for the main active site to facilitate the 2e – ORR catalytic process. Benefiting from the above merits, the obtained HGC 500 possesses superior performance with a selectivity of 92 % and mass activity of 43.6 A g cat –1 at 0.65 V ( vs. RHE). Besides, the HGC 500 can operate steadily for 12 h with the accumulation of H 2 O 2 reaching up to 4090±71 ppm and a Faradic efficiency of 95 %. The H 2 O 2 generated from the electrocatalytic process in 3 h can degrade a variety of organic pollutants (10 ppm) in 4–20 min, displaying the potential in practical applications.
研究领域:
材料科学
·
电化学
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环境科学
·
催化
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）