ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Pubao Peng,Song Li,Yaru Gong,Jiajun Nan,Congmin Liang,Yang Geng,Di Li,Dewei Zhang,Shihua Zhang,Guodong Tang
Here, Pb/Y codoped SnSe nanorods were fabricated via a bottom-up, cost-effective hydrothermal method. The formation of nanorod structures generating high-density grain boundaries significantly enhances phonon scattering, serving as the primary mechanism for lattice thermal conductivity reduction. Furthermore, Y-element enrichment regions, nanoprecipitates, and dense dislocation networks provide additional phonon scattering that further suppresses phonon transport. These multiscale structural features synergistically impede phonon propagation across all frequency ranges, ultimately yielding an ultralow κL of 0.157 W m–1 K–1 at 873 K in the Pb and Y codoped SnSe nanorods. Meanwhile, Pb/Y codoping enhances carrier concentration, leading to a sharp increase in electrical conductivity in Sn0.99–xPb0.01YxSe nanorods. Concurrently, the electrical transport properties are significantly improved, resulting in enhanced power factor. As a result, this carrier and phonon synergistic optimization contributes to a peak ZT of 1.74 at 873 K in Sn0.985Pb0.01Y0.005Se nanorods. This work provides insights for developing high-performance polycrystalline SnSe through advanced doping strategies and structural design.
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Shijie Wang,Yihang Chen,Yu Jia,Chen Wang,Guizhuan Xu,Youzhou Jiao,Chao He,Chun Chang,Qianhui Guo
An effective catalytic strategy for the conversion of glucose to 5-ethoxymethylfurfural (EMF) catalyzed by ultrastable Y zeolite (USY) in a co-solvent system was developed. Effects of co-solvent and reaction conditions were first investigated. Tetrahydrofuran (THF) with low dipolarity/polarizability (π*) was screened as the appropriate co-solvent, and a higher EMF yield of 41.46% was obtained as the ratio of ethanol to THF was 7:3. The macroscopic reaction kinetic study indicated that THF can protect EMF from easy degradation to EL. Moreover, the reusability and the characterization of USY verified the feasibility of USY as an efficient solid acid catalyst. In this study, density functional theory (DFT) calculations for the catalytic mechanism and solvent effect at the molecular scale were performed for the first time. The extra-framework aluminum species (EFAL), in which Al 3+ played an essential role in the reaction as the preferred EFAL species, and THF can reduce the energy barrier of USY-catalyzed glucose isomerization . Meanwhile, the inhibitory effect of THF on EMF alcoholysis was explored via the frontier molecular orbital theory. The results showed that THF increased the LUMO energy of EMF compared with ethanol and γ-valerolactone, which decreased its susceptibility to nucleophilic attack and reduced the adverse alcoholysis of EMF and humins formation. This study provided an enlightening reference for the efficient synthesis of EMF from carbohydrates catalyzed by solid acid catalyst under solvent effect.
研究领域:
化学工程
·
催化化学
·
计算化学
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 3
·763-772
·
IF 2.5
Jiang Tongzhou,Wu Fei,Ren Yurong,Qiu Jianhua,Chen Zhihui
High-entropy pyrochlore oxide (Y,Dy,Ce,Nd,La) 2 Sn 2 O 7 has been synthesized by the co-precipitation method. EDS and XPS analysis demonstrated the high-entropy structure in M 2 Sn 2 O 7 (M = Y, Dy, Ce, Nd, La) ultrafine powders, which is developed as the active material in lithium anode. The effects of different binders on the cycling performance and rate capability were discussed. Benefiting from the synergistic effects of high-entropy system and the strong intermolecular force provided by the sodium carboxymethyl cellulose (CMC) system, the optimized M 2 Sn 2 O 7 /CMC (M = Y, Dy, Ce, Nd, La) delivers a high initial discharge capacity of about 766 mAh g −1 and exhibits excellent cycle stability. A reversible capacity of 396 mAh g −1 and superior delivering retention of ~ 100% can be obtained at 100 mA g −1 after 100 cycles. Meanwhile, the capacity retention rate of 54.5% can still be reached after the cycling at various current densities from 0.05 to 1 A g −1 , demonstrating potential application prospect of the M 2 Sn 2 O 7 /CMC.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
Coatings
·
2026
·Vol. 16
·期 1
·135
·
IF 2.8
Chanxi Yan,Gaoping Liu,Qing Zhu,Yashi Zhou,Yuan Yuan
Ice accumulation on power transmission lines poses serious threats to operational safety and can lead to substantial social and economic impacts. While various anti-icing coatings have been investigated, their performance is often limited by the effectiveness and durability of anti-icing. Slippery lubricant-infused porous surfaces (SLIPSs) have shown remarkable anti-icing properties and durability, aided by their lubricant-infused and self-healing capability. In this study, SLIPSs were successfully fabricated on aluminum substrates using a two-step anodization process. The effects of the anodizing parameter of the current density on pore diameter and depth at each stage were systematically investigated. Compared to untreated aluminum and superhydrophobic coatings (SHCs), SLIPSs presented good anti-icing properties. First, at −6 °C, droplets slid off the surface completely within 4340.5 ms without pinning, indicating sustained droplet-shedding capability. It also significantly delayed ice formation, extending the freezing time to 80 min—eight times longer than that of the untreated surface. Moreover, the SLIPSs also exhibited ultra-low ice adhesion, with an initial strength of only 6.93 kPa. Meanwhile, after 100 frosting–defrosting cycles, SLIPSs could still maintain low ice adhesion strength (<20 kPa). The prepared SLIPS with a Y-shaped pore structure demonstrates good potential for anti-icing.
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Yaorui Li,Adede Ochieng Simon,Caishan Jiao,Meng Zhang,Wenfu Yan,Heng Rao,Jiancong Liu,Jianan Zhang
In this study, a new and efficient sorbent material was developed by the surface modification of zeolite Y with surfactant of cetyltrimethyl ammonium bromide (CTAB) and amino acid of l -aspartic acid (Asp) for rapid removal of Sr 2+ , Cs + and UO 2 2+ in solution. The as-synthesized and modified zeolite Y were characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR) and nitrogen adsorption-desorption analysis. The results showed that after first grafting the cations of CTAB on the external surface of zeolite Y crystals, negatively charged Asp was then successfully introduced onto zeolite to form the CTAB + Asp dually modified zeolite Y sorbent . The fraction of CTAB and Asp in dually modified zeolite Y is 9.6 wt % and 16.3 wt %, respectively. The sorption isotherm of UO 2 2+ , Sr 2+ and Cs + by such sorbent was better fitted by Langmuir model. The CTAB + Asp dually modified zeolite Y took 20 min to reach the maximum sorption amount, while the unmodified zeolite Y took 240 min. This encouraging result provides a new concept to design sorbent materials for rapid removal of radionuclides from contaminated water system in an emergency.
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·
IF 13.325
Li Jing,Yin Ruiming
In this study, self-reinforced Y-α-SiAlON was prepared by two-step phase transformation using single or dual rare-earth oxide addition. The process was implemented by a two-step sintering technique. The mechanism of two-step phase transformation and microstructure evolution of Y-α-SiAlON with or without Ce 2 O 3 addition were investigated in detail. The predominant phase of the sample after the first step (i.e., pressureless sintering at low temperature) comprised elongated β-SiAlON grains. By contrast, the majority phase of sample after the second step (i.e., gas pressure sintering at high temperature) included coarse, elongated α-SiAlON grains. The driving force for β-to-α SiAlON phase transformation and liquid viscosity decreased, whereas the amount of liquid phase increased because of Ce 2 O 3 addition, which contributed to anisotropic growth and resulted in more elongated α-SiAlON grains. The sample co-doped with Y and Ce exhibited the best mechanical properties with fracture toughness of 7.8 MPa m 1/2 and Vickers hardness of 19.81 GPa.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 48
·期 6
·8773-8778
·
IF 5.532
Xin Kang,Xiaohui Li,Xiaoyi Chen,Bo Gao,Pengjun Zhao,Zhaoyang Chen,Wenwen Kong,Aimin Chang
In this study, a series of novel negative temperature coefficient thermistor materials based on A 2 Ti 2 O 7 ( A = Sm, Eu, Y) titanate ceramics have been developed for high-temperature applications. The A 2 Ti 2 O 7 ( A = Sm, Eu, Y) ceramics showed cubic pyrochlore structures with dense morphology in X-ray diffraction and scanning electron microscopic analyses. These ceramics showed typical NTC characteristics in a wide temperature range of 673–1473 K, accompanied by resistance drift rates of 2.71%, 1.63%, and 4.95% for 400 h of ageing at 1173 K. The proposed ceramics have high resistivity and thermal constants B that ensure their better sensitivity at high temperatures and also show unique oxygen insensitivity. These properties outperform those of traditional high-temperature NTC materials composed of perovskite-type or scheelite-type ceramics, making A 2 Ti 2 O 7 ( A = Sm, Eu, Y) ceramics promising candidates for fabricating high-temperature NTC thermistors.
研究领域:
材料科学
·
陶瓷
·
电子材料
·
热电材料
·
固态物理
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 47
·期 4
·4831-4837
·
IF 3.83
Yu Wang,Ying Tang,Jie Li,Weishuang Fang,Shiyao Shen,Feihu Li,Lian Duan,Ming Qin,Liang Fang
The Ca 3 M 2 Si 3 O 12 (M = Yb, Y) ceramics with orthorhombic silico-carnotite structure were fabricated via high-energy ball milling and solid-state reaction route. Dense Ca 3 Yb 2 Si 3 O 12 and Ca 3 Y 2 Si 3 O 12 ceramics sintered at 1260 °C and 1240 °C revealed promising microwave dielectric properties with ε r = 9.2 and 8.7, Q×f = 56,400 GHz and 29,094 GHz, τ f = −77.5 ppm/°C and −76.8 ppm/°C, respectively. The connection between crystal structure and Q×f values of Ca 3 M 2 Si 3 O 12 (M = Yb, Y) ceramics was discussed with respect to the packing fraction, and their intrinsic microwave dielectric properties were examined using the infrared reflectivity spectra analysis. The thermal stability of Ca 3 Yb 2 Si 3 O 12 was improved successfully by forming 0.91Ca 3 Yb 2 Si 3 O 12 ‐0.09CaTiO 3 composite ceramics with τ f = +2.9 ppm/°C, ε r = 12.93 and Q×f = 26,729 GHz.
研究领域:
材料科学
·
陶瓷
·
微波材料
·
固态化学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 21
·12599-12608
·
IF 10.7
Yiming Yang,Jiachen Lu,Xinyu Zhang,Yanuo Shi,Peng Du,Xiao Ling,Nan Yang,Qianli Chen
Y-doped Ba(Zr,Ce)O3 (BZCY) proton conducting ceramics have attracted extensive attention because of their promising applications as electrolytes for intermediate-temperature proton ceramic electrochemical cells. The proton conductivity of BZCY is governed by their lattice volume and crystal symmetry; however, systematic studies of the competition between these two factors are lacking, hindering further improvement of their proton conductivity at low and intermediate temperatures. In this work, the crystal symmetry of BZCY epitaxial films deposited on NdGaO3 (110) is compared to that of polycrystalline bulk BZCY based on Raman spectra. The Raman signal of BZCY epitaxial films is amplified using surface-enhanced Raman spectroscopy and subsequently extracted utilizing the nonnegative matrix factorization method. The relative Raman intensity ratio of the BO6 octahedra motion to the Ba-BO6 relative motion in the ABO3 structure indicates that as the Ce content increases, the crystal symmetry of polycrystalline bulk BZCY decreases, whereas that of the epitaxial films on NdGaO3 remains consistently lower compared to bulk BZCY. The relationship between the activation energy and relative Raman intensity of epitaxial films and bulk BZCY indicates quantitatively that higher activation energy is observed in the crystal structure with lower symmetry. This work suggests that crystal symmetry has a predominant effect on the activation energy of BZCY. The results provide a deeper insight for developing proton conducting electrolyte membranes with high proton conductivity and low activation energy.
研究领域:
材料科学
·
固体离子学
·
光谱学
·
能源材料
·
陶瓷电解质
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 23
·6869-6878
·
IF 7
Jinmiao Jiao,Conggang Li,Yuheng She,Ning Ye,Zhanggui Hu,Yicheng Wu
Nonlinear optical (NLO) materials currently attract significant interest and hold paramount importance in the optoelectronic field. Nevertheless, the fabrication of NLO crystals capable of transmitting ultraviolet to mid-infrared wavelengths remains a formidable challenge. Herein, we synthesized two novel NLO crystals, namely Cs3REGe3O9 (RE = Y, Gd), by employing a structural gene strategy that harmoniously merges flexible [YO6] and [GdO6] octahedra with rigid [GeO4] motifs. Remarkably, Cs3REGe3O9 (RE = Y, Gd) crystals exhibit substantial band gaps of 4.92 and 5.3 eV, respectively, while achieving the shortest reported ultraviolet cutoff edges at 210 and 215 nm among the boron-free germanate-based NLO materials. Importantly, these compounds also feature a remarkably broad infrared transparency range exceeding 6.8 μm. Furthermore, both compounds demonstrate a moderate second-harmonic-generation (SHG) response, comparable to that observed in KDP. Additionally, first-principles calculations unveil that the synergistic effect of the [REO6] octahedra and [GeO4] tetrahedra plays a pivotal role in governing the optical properties of Cs3REGe3O9 (RE = Y, Gd). These explored findings offer a novel avenue for leveraging the highly desired NLO materials in the region spanning from ultraviolet to mid-infrared wavelengths.
研究领域:
材料科学
·
光学工程
·
晶体化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
M. Yousaf,Majid Niaz Akhtar,Baoyuan Wang,Asma Noor
Rare earths RE's (Pr, Y, Gd, Ho, Yb) substituted MnZn spinel ferrites with composition of Mn 0.5 Zn 0.5 M 0.02 Fe 1.98 O 4 (M = Pr, Y, Gd, Ho, Yb) are prepared by sol gel combustion approach. Low sintering temperature (500 °C) is used to sinter the RE's doped MnZn samples. MnZn samples are further characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) to measure the cubic crystalline structure, particle size, morphology, porosity and grain size. Cubic crystalline phase of prepared RE's doped MnZn ferrites is confirmed by x-ray diffraction (XRD). The morphology, porosity and grain size are observed using FESEM. The magnetic properties of RE's doped MnZn nanoferrites are analyzed by vibrating sample magnetometer (VSM). Coercivity (H c ), remanence (M r ) and saturation magnetization (M s ) are calculated from the magnetic loops. The saturation and remanence of the nanoferrites are increased by the substitution of RE's metal ions and varies from 14.76 to 26.36 emu/g and 9.98–22.48 emu/g respectively. Bohr magneton and anisotropy constant are calculated from the recorded magnetic data. The conductive analysis of the prepared samples is studied at 40 °C −300 °C temperature, leading to the conductivity measurements from 1.12 × 10 -2 Ω -1 -cm -1 to 9.52 × 10 -2 Ω -1 -cm -1 . UV–Vis spectroscopy is used to determine the semi conducting nature of RE's doped MnZn spinel ferrite samples. The magnetic, conductive and optical study of the RE's doped MnZn nanoferrites sintered at low temperature suggests the use of these materials for microwave absorption, supercapacitor , lithium ion batteries and nanoelectronics industrial applications.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Zeyuan Li,Yuze Jiao,Huang Lin,Qianhong Shen,Xinglei Zhao,Peng Wang,Qilong Zhang
Traditional zirconia (ZrO 2 ) fibers suffer from severe limitations in mechanical performance under extreme conditions due to high-temperature phase transformation-induced cracking, abnormal grain growth, and inherent brittleness, making it difficult to meet the stringent requirements of fields such as aerospace and energy systems. This work proposes an innovative fabrication strategy that successfully achieves in-situ growth of an amorphous carbon coating layer on the surface of Al/Y co-doped ZrO 2 nanofibers through electrospinning and hot-stretching processes. In this work, zirconium acetate acts as both zirconium source and solvent, simplifying precursor preparation. The hot-stretching process utilizes the micropores on the fiber surface to form an in-situ amorphous carbon layer, which significantly enhances the mechanical properties of the fibers: tensile strength reaches 8.08 MPa, and the fiber membrane maintains structural integrity after 500 bending cycles at 80% strain, demonstrating excellent fatigue resistance and elastic recovery capability; it also exhibits outstanding thermal shock resistance at extremely low (-196°C) and ultra-high (1350°C) temperatures. Through the key innovation of introducing an amorphous carbon layer via hot-stretching, this work successfully integrates high strength, superior flexibility, and outstanding fatigue resistance into ZrO 2 fibers. Furthermore, owing to its high porosity (92%), the fiber membrane exhibits ultra-low thermal conductivity and effective sound absorption. Ultimately, this provides a reliable solution for multifunctional ceramic fiber materials applied in high-temperature environments (up to 800°C).
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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）