CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Junghoon Lee,Dongkyeong Ham,Hyeonho Song,Ben Ko,Putrakumar Balla,Daeseob Shin,Jiyun Lee,Jaeyong Park,Erdem Sasmaz,Deog-Keun Kim,Sungtak Kim
Gd regulates metal–zeolite interfaces in bifunctional Y zeolite catalysts. • Sequential Gd introduction improves Pt dispersion and suppresses over-cracking. • Gd co-impregnation stabilizes interfacial Ni 2+ species in Ni/Y catalysts. • Ni–Gd/Y lowers the jet-fuel productivity deactivation rate by 7.7-fold. • Optimal Gd loading widens the C 8 –C 15 operating window in Pt–Ni/Y catalysts. Selective hydroprocessing of long-chain paraffins to jet-fuel-range hydrocarbons (C 8 –C 15 ) requires bifunctional catalysts that combine high selectivity with long-term durability. Here, we show that gadolinium (Gd) acts as an interfacial regulator whose effects on zeolite Y-supported Pt and Ni catalysts are metal- and preparation-dependent. In the Pt/Y system, sequential Gd introduction improves Pt nanoparticle dispersion, increases the surface metallic fraction, and shifts the acid balance toward a more Brønsted-weighted environment, collectively widening the isomerization window and shifting the yield optimum to a lower extent of cracking, which raises the maximum C 8 –C 15 yield from 45.7 to 52.4 wt% in n-hexadecane hydroprocessing. In the Ni/Y system, Gd instead stabilizes interfacial oxidized Ni 2+ species and attenuates the accessible acid site population; although the conversion onset shifts to higher temperature, the jet-fuel productivity deactivation rate constant decreases by approximately 7.7-fold (1.10 × 10 −2 → 1.43 × 10 −3 h −1 ) over 100 h on stream, driven by suppressed Ni sintering and reduced carbonaceous deposition (16.3 → 9.6 wt%). These metal-dependent effects transfer to Pt Ni bimetallic catalysts, where Gd loading produces a volcano-type dependence of the jet-fuel operating window (ΔT 50 ), with 0.5Pt–(10Ni3Gd)/Y delivering the optimum balance between selectivity and high-temperature robustness. These results establish rare-earth-enabled interfacial engineering as a generalizable strategy for simultaneously tuning selectivity and durability in bifunctional zeolite catalysts for aviation fuel production. Download: Download high-res image (149KB) Download: Download full-size image
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JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Guoqing Yu,Lin Zhou,Fengqin Liu,Siming Pang,Dehong Chen,Hongliang Zhao,Zhengping Zuo
In this study, a molten salt co-reduction method was proposed for preparing Y–Al intermediate alloys and the electrochemical co-reduction behaviors of Y(III) and Al(III) and the reaction mechanism of intermetallic compound formation were investigated by transient electrochemical techniques . The results show that the reduction of Y(III) at the Mo electrode is a reversible electrochemical process with a single-step transfer of three electrons, which is controlled by the mass transfer rate. The diffusion coefficient of Y(III) in the fluoride salt at a temperature of 1323 K is 5.0238 × 10 −3 cm 2 /s. Moreover, the thermodynamic properties associated with the formation of Y–Al intermetallic compounds were estimated using a steady-state electrochemical method. Y–Al intermediate alloy containing 92 wt% yttrium was prepared by constant current electrolysis at 1323 K in the LiF–YF 3 –AlF 3 –Y 2 O 3 (6 wt%)–Al 2 O 3 (1 wt%) system at a cathodic current density of 8 A/cm 2 for 2 h. The Y–Al intermediate alloy is mainly composed of α-Y 2 Al and Y phases. The development and application of this innovative technology have solved major technical problems, such as a long production process, high energy consumption, and serious segregation of alloy elements at this stage.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 15
·12414
·
IF 5.6
Zhengyu Xu,Qingtai Li,Yaying Huang,Kaiqiang Guo,Bin Xue,Yi Cao,Yiran Li
Nonspecific interactions play a significant role in physiological activities, surface chemical modification, and artificial adhesives. However, nonspecificity sometimes causes sticky problems, including surface fouling, decreased target specificity, and artifacts in single-molecule measurements. Adjusting the liquid pH, using protein-blocking additives, adding nonionic surfactants, or increasing the salt concentration are common methods to minimize nonspecific binding to achieve high-quality data. Here, we report that grafting heteromorphic polyethylene glycol (Y-shape PEG) with two inert terminates could noticeably decrease nonspecific binding. As a proof-of-concept, we performed single-molecule force spectroscopy and fluorescence staining imaging experiments to verify the feasibility of Y-shape PEG in blocking nonspecific interactions. Our results indicate that Y-shape PEG could serve as a prominent and efficient candidate to minimize nonspecificity for scientific and biomedical applications.Keywords:single-molecule force spectroscopy;atomic force microscopy;nonspecific interaction;surface modification
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高影响因子
mBio
·
2022
·Vol. 13
·期 6
·
IF 7.786
Huijuan Jin,Xiuying Li,Hongyan Wang,Natalie L. Cápiro,Xiaocui Li,Frank E. Löffler,Jun Yan,Yi Yang
Isoprene is a ubiquitously distributed, biogenic, and climate-active organic compound. Microbial isoprene degradation in oxic environments is fairly well understood; however, studies exploring anaerobic isoprene metabolism remain scarce, with no isolates for study available. Here, we obtained an acetogenic isolate, designated Acetobacterium wieringae strain Y, which hydrogenated isoprene to a mixture of methyl-1-butenes at an overall rate of 288.8 ± 20.9 μM day−1 with concomitant acetate production at a rate of 478.4 ± 5.6 μM day−1. Physiological characterization demonstrated that isoprene was not utilized in a respiratory process; rather, isoprene promoted acetogenesis kinetically. Bioinformatic analysis and proteomics experiments revealed the expression of candidate ene-reductases responsible for isoprene biohydrogenation. Notably, the addition of isoprene to strain Y cultures stimulated the expression of proteins associated with the Wood-Ljungdahl pathway, indicating unresolved impacts of isoprene on carbon cycling and microbial ecology in anoxic environments (e.g., promoting CO2 plus H2 reductive acetogenesis while inhibiting methanogenesis). Our new findings advance understanding of microbial transformation of isoprene under anoxic conditions and suggest that anoxic environments are isoprene sinks.IMPORTANCE Isoprene is the most abundant, biologically generated, volatile organic compound on Earth, with estimated emissions in the same magnitude as methane. Nonetheless, a comprehensive knowledge of isoprene turnover in the environment is lacking, impacting global isoprene flux models and our understanding of the environmental fate and longevity of isoprene. A critical knowledge gap that has remained largely unexplored until recently is the microbiology and associated molecular mechanisms involved in the anaerobic biotransformation of isoprene. By integrating culture-dependent approaches with omics techniques, we isolated an acetogen, Acetobacterium wieringae strain Y, capable of anaerobic biohydrogenation of isoprene. We obtained the complete genome of strain Y, and proteomic experiments identified candidate ene-reductases for catalyzing the asymmetric reduction of the electronically activated carbon-carbon double bond of isoprene. We also demonstrated that isoprene biohydrogenation stimulates the expression of Wood-Ljungdahl pathway enzymes. This study emphasizes the ecological roles of specialized Acetobacterium on the natural cycling of isoprene in anoxic environments and the potential effects of isoprene biohydrogenation on acetogens and methanogens, which have implications for global climate change and bioenergy production.
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CATALYSIS COMMUNICATIONS
·
2020
·
IF 3.612
Shanqing Yu,Jiasong Yan,Wei Lin,Jiexiao Zhang,Jun Long
Zirconium-modified Y zeolites (ZrUSY) were prepared by impregnation of the zeolite with anhydrous-ethanol and aqueous ion exchange methods. The ZrUSY samples were characterized by powder X-ray diffraction, nitrogen physisorption, and Fourier transform infrared spectroscopy. The results indicated that ZrUSY prepared by the impregnation with anhydrous-ethanol method showed higher crystallinity, specific surface area and hydrothermal stability. The incorporation of Zr into other Y zeolites leads to an increase of the Brønsted acid site concentration and a decrease of the Lewis acid site concentration compared to the ultra-stable Y zeolite (USY). The ZrUSY was much more favorable towards heavy oil FCC conversion with decreasing coke yield and improving olefins selectivity.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Linbo Yang,Yichao Lin,Yayun Zhao,Jiejie Li,Ziqi Tian,Yaqi Wu,Haitao Hu,Hao Wang,Liang Chen
Zeolites are promising materials for CO2 adsorption, yet they still face the challenges of low adsorption capacity and selectivity. Herein, we report a strategy of grafting ethylenediamine to a Co-exchanged Y zeolite to improve the CO2 adsorption capacity of Y zeolite via strong interactions between Co2+ and amine groups. Functionalization of zeolite Y with amines (Co-Y-EN) enables significant improvement in the CO2 adsorption capacity (4.36 mmol/g at 1 bar and 298 K), which is 1.73 times higher than that of pristine Na-Y zeolite. Moreover, Co-Y-EN demonstrates enhanced CO2 selectivity, as confirmed by both single-component gas adsorption experiments and breakthrough tests. The superior selectivity is attributed to the strong affinity between the amine sites and CO2 molecules, as well as the optimized pore sizes for CO2 adsorption. Overall, this study presents a straightforward approach to enhancing the CO2 adsorption performance of zeolite materials.
研究领域:
材料科学
·
环境科学
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Materials
·
2025
·Vol. 18
·期 7
·1494
·
IF 3.2
Zhiyong Li,Azman Jalar,Norinsan Kamil Othman
A Co-based composite powder, doped with rare earth Y, was crafted through a series of processes involving spray-drying, calcination, and low-temperature reduction. This powder was then blended with tungsten carbide (WC) powder and subjected to ball-milling. The resultant mixture was consolidated into a robust Y-doped WC-Co cemented carbide via the process of spark plasma sintering (SPS). The outcomes demonstrate that incorporating rare earth Y into Co powder to form a Co-Y2O3composite powder via an innovative spray-drying, calcination, and low-temperature reduction process ensures uniform distribution of Y in the Co matrix. This uniform distribution refines the alloy’s grain structure during subsequent sintering, leading to enhanced performance. Within a specific range, increasing the Y content improves the overall alloy properties. It is notable that at a Y content of 1.5%, the alloy’s properties reach a state of stability, characterized by a density of 98.91%, a maximum hardness of 2120 Hv30, and a fracture toughness of 8.24 MPa·m1/2. The novel Y incorporation method has been shown to enhance the strength of the binder phase, impede the growth of WC grains, and thereby lead to a substantial improvement in the overall performance of the cemented carbide.
研究领域:
材料科学
·
冶金学
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International Journal of Minerals Metallurgy and Materials
·
2016
·Vol. 23
·期 11
·1346-1351
·
IF 0.882
Jiang Peng,Yang Wen-hui,Zhou Yun-cheng,Kuang Jian-lei,Li Yong,Xiao Ting
Brownmillerite-type oxides Ba 2 In 2− x − y
Mn
x
Al
y
O 5+ x
(0 ≤ x ≤ 0.6, 0 ≤ y ≤ 0.5) were prepared at 1300°C through solid-state reaction. X-ray diffraction (XRD) analysis showed that the structure symmetry evolved from orthorhombic to cubic with increasing Mn and Al contents. When y was greater than 0.3, peaks associated with small amounts of BaAl 2 O 4 and Ba 2 InAlO 5 impurities were observed in the XRD patterns. When substituted with a small amount of Mn ( x ≤ 0.3), the Ba 2 In 2− x − y
Mn
x
Al
y
O 5+ x
samples exhibited an intense turquoise color. The color changed to green and dark-green with increasing Mn concentration. UV–vis absorbance spectra revealed that the color changed only slightly upon Al doping. The valence state of Mn ions in Ba 2 In 2− x − y
Mn
x
Al
y
O 5+ x
was confirmed to be +5 on the basis of X-ray photoelectron spectroscopic analysis. According to this analysis, the intense turquoise color of the Ba 2 In 2− x − y
Mn
x
Al
y
O 5+ x
samples is rooted in the existence of Mn 5+ ; thus, the introduction of Al does not affect the optical properties of the compounds.
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RARE METALS
·
2026
·Vol. 45
·期 5
·e70330
·
IF 12.1
Yingying Deng,Peng Wang,Fei Sha,Suyang Wang,Jinyan Hu,Qianyun Wang,Mingxing An,Qi Sun,Yuanyu Wang,Jiao-Jing Shao
en This link goes to a English section zh This link goes to a Chinese section During the operation of lithium-ion batteries, uncontrollable lithium dendrite growth often occurs, resulting in internal short circuits and a significant reduction in cycle life, which poses a major obstacle to their practical application. Modification of the separator has emerged as one of the key strategies to suppress lithium dendrite formation. In this study, we modify the surface of a commercial polypropylene (PP) separator using two-dimensional zeolite Y (2D-Y) for lithium-ion batteries. The uniform pores of the zeolite Y provide an effective platform for the homogeneous distribution of lithium ions. The results show that the 2D-Y coating can mitigate the growth of lithium dendrites, thus improving the cell performance. The capacity retention of the 2D-Y-PP cell reaches 77.14% after 1000 cycles at 2C, which is significantly better than the capacity retention of the bare PP cell (less than 25%). At a current density of 0.1 mA cm −2 , the lithium deposition overpotential of the 2D-Y-PP lithium symmetric cell is reduced by 56% compared to the bare PP cell, and the symmetric cell cycle life exceeds 2000 h. Furthermore, the homogenization of lithium deposition is clearly evidenced after 200 cycles. This study demonstrates that the sieving effect of inorganic zeolite coatings modulates lithium deposition kinetics, offering a novel research idea for designing high-safety lithium metal batteries. 摘要 en This link goes to a English section zh This link goes to a Chinese section 锂离子电池运行过程中,常出现不可控的锂枝晶生长现象,导致电池内部短路并显著缩短循环寿命,阻碍了电池的实际应用。改性隔膜已成为抑制锂枝晶形成的关键策略之一。本研究采用二维沸石Y对商用聚丙烯(PP)隔膜表面进行改性,用于锂离子电池。沸石Y均匀的孔道结构为锂离子的均匀分布提供了有效平台。实验结果表明,二维沸石Y涂层能有效抑制锂枝晶生长,从而提升电池性能。在2C倍率下,2D-Y-PP电池经1000次循环后容量保持率达77.14%,显著优于PP基电池(低于25%)。在0.1 mA/cm 2 电流密度下,2D-Y-PP对称电池的锂析出过电位较PP降低56%,且对称电池循环寿命超过2000小时。此外,经过200次循环后,锂沉积的均匀性得到显著提升。本研究证实无机沸石涂层的筛分效应可调控锂沉积动力学,为设计高安全性锂金属电池提供了创新思路。
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Erqing Zhao,Yudi Guo,Guangri Xu,Long Yuan,Jingcheng Liu,Xiaobo Li,Li Yang,Jingjing Ma,Yuanchao Li,Shumin Fan
Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 is regarded as one of the most promising solid electrolytes for all solid state lithium ion batteries (ASSLIBS). However, its grain boundary conductivity is still low, which reduces the total conductivity of electrolyte. In this work, in order to further improve the electrical conductivity of Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , a series of Y doped Li 1.3 Al 0.3-x Y x Ti 1.7 (PO 4 ) 3 (x = 0, 0.025, 0.05, 0.075 and 0.15) solid electrolytes were synthesized using a modified solid state method. Effects of Y doping content on morphology, phase and electrical conductivity of Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 electrolyte materials were systematically investigated. All synthetic electrolyte powders show Nasicon-like structure, well-shaped polyhedral morphology as well as good crystallinity. Y dopant content has a great influence on electrochemical properties of electrolytes. The high total conductivity of 7.8 × 10 −4 S/cm at room temperature and a low activation energy of 0.17 eV is obtained for the electrolyte with the Y doping content of 0.075 due to the increasing of grain boundary conductivity, and its electrical conductivity is about 2 times larger than that of the undoped electrolyte. The excellent electrochemical performance is mainly attributed to high electrolyte density which results from the good sintering property of electrolyte materials as well as the existence of YPO 4 phase at grain boundaries. Additionally, this electrolyte has a negligible electronic conductivity. These results suggest that Y doped Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 can be used as an alternative solid electrolyte for all solid state lithium ion batteries.
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Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 14
·1964-1972
·
IF 8.683
Mingrui Guo,Meng Chen,Jixiang Xu,Jing Wang,Lei Wang
The intramolecular doping of donor units or acceptor units in carbon nitride (g-C3N4, CN) is regarded as an effective method for regulating electron structure and enhancing the catalytic activity of CN. Herein, benzene rings and eosin Y (EY) co-grafted CN with carbon vacancies (EY-PhCN) was prepared by calcining a supermolecular precursor consisting of melamine, cyanuric acid, and benzonquanmine followed by covalently hooking the EY. Theoretical and experimental results demonstrated the directional electron transfer, spatially isolated electron–hole pairs and increased light response in the resulting ultrathin holey EY-PhCN. An optimal H2 production rate of 4.44 mmol g−1 h−1 was obtained over the 1%Pt-loaded EY-PhCN catalyst. The corresponding apparent quantum yield was 27.38% at 420 nm. Moreover, the EY-PhCN exhibited high CO2 reduction rate with H2O. The yields of CO and CH4 were 61.91 and 13.75 μmol g−1, respectively within 5 h light irradiation, higher than that of CN (CO: 24.60 μmol g−1, CH4: 8.51 μmol g−1). The work may give new insight into associating carbon vacancies and edge decoration on CN to achieve remarkably enhanced photocatalytic activity.
研究领域:
材料科学
·
环境科学
·
化学工程
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Han Wang,Caoling Li,Jingwei Zhang,Zhao Yang,Junjun Li,Yu Cao,Kangbing Wu,Zhihong Liu,Junxing Hao,Xiaoxue Ye
Transition metal sulfides have garnered significant interest in the realm of photoelectrochemical (PEC) sensors due to their remarkable optical and electrical properties. However, their intrinsic UV–vis adsorption and electron-donor consumption severely hinder their nonirritating and in situ epidermal PEC applications. Herein, a NIR-808 nm light-excited heterojunction, phosphomolybdic acid-encapsulated ytterbium-doped bismuth sulfide (Yb-Bi 2 S 3 /PMA), is synthesized by hydrothermal method for self-sufficient electron donor-based PEC sensing. Further, the Yb-Bi 2 S 3 /PMA heterojunction is decorated on flexible and integrated laser-induced graphene electrode arrays, providing ultrafast charge carrier transfer capacity and robust mechanical durability (300 bending cycles) for subsequent wearable PEC sensing. As a showcase, the aptamer molecular recognition-based wearable PEC sensor for sweat trace Neuropeptide Y (NPY, a stress or depression biomarker) presents an ultra-low detection limit (0.39 fM) and good anti-interference ability. Moreover, the integration of wearable PEC aptasensor with signal processing and wireless communication facilitates nonirritating and in situ analysis of sweat trace NPY dynamics in various real scenarios (feeding behaviors, physiological stress, and circadian rhythm). More broadly, this research establishes the foundation for NIR-excitable semiconductors equipped with self-sufficient electron donor capabilities, unlocking the potential for ultrasensitive wearable PEC sensing applications.
研究领域:
材料科学
·
生物医学工程
·
光电化学传感
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