JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2026
·Vol. 118
·期 1
·14
·
IF 4.2
Li Jingyu,Zhou Danchi,Tian Panpan,He Cewen,Xu Nana,Li Yuanbing
Zirconia nanofibers frequently suffer from undesirable phase transformations and abnormal grain growth at elevated temperatures, significantly limiting their high-temperature applications. To overcome these challenges, we developed an innovative biphasic precursor system that combines zirconium acetate and zirconium oxychloride as co-precursors. By precisely optimizing the molar ratio of these precursors, we successfully fabricated high-quality yttria-stabilized zirconia (YSZ) nanofibers through a combination of electrospinning and sol-gel processing. Extensive characterization (FTIR, STA/TG-MS, XRD, SEM, and TEM) revealed that the optimal precursor ratio of 8:2 (zirconium acetate: zirconium oxychloride) effectively suppresses grain growth while maintaining smooth, defect-free fiber surfaces with uniform diameter distribution. The resulting nanofibers calcined at 700 °C exhibited outstanding mechanical properties, including superior tensile strength (0.25 ± 0.02 MPa) and minimal bending stiffness (23 ± 2 mN). At 1000 °C, these nanofibers maintain structural integrity with improved strength retention (0.18 ± 0.01 MPa) and controlled grain growth, while preserving cubic phase stability. The biphasic precursor strategy enables precise control over crystallization kinetics and effectively suppresses detrimental phase transformations. This study not only addresses the critical issue of thermal instability in zirconia nanofibers but also provides new insights into precursor selection for the design of high-performance ceramic nanofibers.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yao-Dong Hao,Jing-Jing Huang,Xiao-dong Wang,Xi Zhao,Wen-Xia Zhang,Cen Tang,Lu Liu,Wen-Zhi Jia,Meng-Fei Luo,Jian Chen
Developing efficient and durable catalysts for catalytic oxidation reaction remains a major challenge. In this work, we found that Pt/ZrO 2 catalyst demonstrated superior performance compared to Pt sites supported on other oxides (e.g., Pt/Al 2 O 3 , Pt/CeO 2 and Pt/Ce 0.6 Zr 0.4 O 2 ) for styrene combustion. To further understand the active sites in Pt/ZrO 2 catalyst, a series of Pt/ZrO 2 catalysts were synthesized via wet impregnation and calcined at different temperatures (250, 300, 500, 700 and 900 °C). Among them, Pt/ZrO 2 -300 (calcined at 300 °C) exhibited the superior performance for styrene combustion. Comprehensive characterizations revealed that the calcination temperature critically influences the geometric and electronic structures of Pt sites, thus governing the generation of Pt σ+ -ZrO 2 interfacial active sites. A moderate calcination temperature is crucial for forming such interfacial active sites, lower temperatures fail to generate them, while higher temperatures result in nanoparticle sintering and a consequent diminution of these sites. Pt/ZrO 2 -300 features small Pt nanoparticles and a higher concentration of active Pt σ+ species, beneficial for the generation of interfacial active sites. In addition, our findings demonstrate that the superior performance of Pt/ZrO 2 -300 in styrene adsorption and oxygen activation stems from its abundant Pt σ+ -ZrO 2 interfacial active sites. Therefore, this work provides valuable insights for the rational design of robust catalysts with interfacial active sites.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xuetong Zhao,Yan Hu,Qi Wang,Gang Liu,Hansheng Cai,Hongwen Liu,Jindong Yang,Liangbin Ai,Jimou He,Yu Gan,Lulu Ren,Ruijin Liao
Cold sintering bridges the ZnO–ZrO 2 co-sintering temperature mismatch. • ZrO 2 is retained as an intergranular pinning phase at 850 °C. • ZrO 2 pinning refines ZnO grains from 2.48 to 1.65 μm. • The optimized ceramic achieves α = 65 and E b = 992 V mm −1 . ZnO varistor ceramics are widely employed for overvoltage protection in electronic circuits and power grids owing to their excellent nonlinear non-ohmic characteristics. However, their insufficient voltage gradient limits further development toward miniaturized, lightweight, and highly reliable devices. Herein, ZrO 2 is introduced as a secondary pinning phase to refine ZnO grains and promote the formation of Bi-rich intergranular phases, enabling the synergistic enhancement of breakdown field ( E b ) and nonlinear response. More importantly, the low-temperature densification feature of cold sintering bridges the co-sintering temperature gap in ZnO-based composite ceramics, suppressing the solid solution of Zr 4+ ( r = 0.80 Å) into the Zn 2+ ( r = 0.74 Å) lattice and thus greatly enhancing the effectiveness of ceramic compositing. At the optimized ZrO 2 content of 2 wt%, the segregated ZrO 2 secondary phase pins grain-boundary migration and reduces the average ZnO grain size from 2.48 to 1.65 μm. Moreover, the increased formation of Bi-rich boundary phases provides additional interfacial sites for oxygen adsorption and electron trapping, raising interface state density ( N s ) from 4.7518 × 10 16 m −2 for the undoped ceramic to 7.4102 × 10 16 m −2 with 2 wt% ZrO 2 addition and barrier height ( φ b ) to 0.9245 eV. As a result, the ceramic achieves a high nonlinear coefficient ( α ) of 65 and an enhanced E b of 992 V mm −1 . Further ZrO 2 incorporation suppresses the grain size to 1.40 μm and increases E b beyond 1200 V mm −1 , highlighting the effectiveness of cold sintering in constructing high-gradient ZnO-based composite varistors. This finding demonstrates that cold sintering opens a new pathway for the fabrication of composite ceramics with improved co-sintering compatibility.
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高影响因子
Nanoscale
·
2025
·
IF 5.1
Yinghui Sun,Jie Bai,Chenghu Zhang,Zezhou Xing,Ying Li,Tong Xu
Bimetallic synergy can competently optimize the electronic structure of the active metals and coordinate the interaction between metal components, which is a good strategy to effectively enhance the catalytic performance and stability of monometallic catalysts. Herein, we report a CuNi bimetallic catalyst supported on the mesoporous zirconia prepared via electrospinning technology, which can achieve high catalytic transfer hydrogenation (CTH) performance with excellent cycle stability. The effect of bimetallic synergistic effect on CTH capacity was systematically investigated by precisely regulating Cu/Ni molar ratio. The optimized Cu2Ni1-ZrO2 catalyst exhibited exceptional performance, achieving 88.9% furfural conversion with 93.6% furfuryl alcohol selectivity in isopropanol under 170℃ for 12 h, accompanied by a notable TOF value of 4.90 h-1. The electron transfer between Cu and Ni promotes the generation of more Cu0/Cu+ active sites, which effectively enhances the CTH activity of the catalyst. Additionally, the Cu2Ni1-ZrO2 catalyst showed stable performance over 6 cycles with negligible activity decay. Finally, the hydrogen transfer path of furfural on the catalyst surface was studied via H isotope labeling mass experiments.
研究领域:
催化化学
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材料科学
·
化学工程
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PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yanpeng Jia,Hongying Hou,Xianxi Liu,Xiaohua Yu,Ju Rong,An Lv,Yixuan Wang,Fangshu Chen
Garnet-type cubic Li 7 La 3 Zr 2 O 12 (LLZO) is widely considered as one of the most promising solid electrolyte candidates for the next-generation solid-state lithium batteries . However, high cost also limits the wide application of LLZO electrolyte. Allowing for the existence of trace hafnium (Hf) element in zirconium dioxide (ZrO 2 ) raw material and thus determining the threshold can significantly reduce the production cost of LLZO. Herein, the garnet-type xHf-LLZO solid electrolytes were synthesized at 1200 °C for 6 h using ZrO 2 raw material with different x mol% Hf (x = 0, 1.0, 1.8 and 2.7), in which 10 % sulfobetaine-modified polyvinylidene fluoride (SB-PVDF) was added for the composite electrolyte membranes in the solid state lithium cells. Furthermore, the effect of Hf element on the structure and electrochemical performances of LLZO solid electrolyte and the threshold of Hf in ZrO 2 were explored. The results showed that the tetragonal phase began to appear in LLZO when the molar ratio of Hf was 1.8 mol%, while the relative density and the room temperature ionic conductivity could remain 91.71 % and 1.08 × 10 −4 S/cm, respectively. The corresponding solid-state lithium cell delivered a specific discharge capacity of 130.2 mAh/g at 0.5C, and the capacity retention rate were as high as 90.7 % after 200 cycles at 1.0C. Seemingly, the threshold of Hf in ZrO 2 to prepare LLZO was about 1.8 mol%, thus reducing the cost for large-scale production of high-performance LLZO.
研究领域:
材料科学
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储能技术
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固态离子学
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电化学
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DOI
高影响因子
Advances in Materials Science and Engineering
·
2018
·Vol. 2018
·期 1
·8191095
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IF 1.372
Xue-Yu Tao,Jie Ma,Rui-Lin Hou,Xiang-Zhu Song,Lin Guo,Shi-Xiang Zhou,Li-Tong Guo,Zhang-Sheng Liu,He-Liang Fan,Ya-Bo Zhu
Star-like nano-ZrO 2 has been synthesized using Zr(NO 3 ) 4 ·5H 2 O as zirconium source by a hydrothermal process without any template and surfactant. The structure of the as-prepared ZrO 2 powder was investigated by multiple advanced analytical methods. The results showed that CH 3 COO − and NO 3 − had great effects on the formation of star-like ZrO 2 nanostructures. The as-prepared ZrO 2 had a superior catalytic activity, and the reason for it was analyzed by UV-Vis diffuse reflectance spectroscopy. The effect of raw material ratios on the photocatalytic property of ZrO 2 was studied. The synthesized ZrO 2 showed a narrow bandgap (3.50–3.85 eV) and an excellent photocatalytic activity, and the degradation of RhB was up to nearly 100% in 30 min with this photocatalyst.
研究领域:
材料科学
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纳米科技
·
光催化
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无机化学
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环境功能材料
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DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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2020
·
IF 4.652
Jianlong Chai,Yabin Zhu,Zhiguang Wang,Tielong Shen,Yiwen Liu,Lijuan Niu,Shufen Li,Cunfeng Yao,Minghuan Cui,Chao Liu
Al 2 O 3 –ZrO 2 (3Y)–SiC ceramic composites were prepared by spark plasma sintering in vacuum under 40 MPa of uniaxial compression between 1300 °C and 1400 °C. The effect of nano-size SiC and sintering temperature on the microstructure and mechanical properties of ceramic composites were investigated. The results showed that SiC particles was uniformly distributed in the composite, mainly within the matrix grains. Sintering temperature and SiC particles caused the shape of alumina grains to be columnar. The flexural strength of 22.3 vol% Al 2 O 3 -57.7 vol% ZrO 2 -20 vol% SiC sintered at 1350 °C composites was 1081 MPa, fracture toughness was 15.18 MPa m 1/2 and hardness was 16.42 GPa. The addition of SiC particles leads to grain boundary strengthening, and the change of fracture mode and cracks deflection and bridging are considered to be the main reasons for the increase in material fracture toughness.
研究领域:
材料科学
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陶瓷学
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复合材料
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固态物理
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结构材料
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2016
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IF 4.012
Hua Wang,Yingge Guo,Cuirong Chang,Xinli Zhu,Xiao Liu,Jinyu Han,Qingfeng Ge
The number of strong acid sites on a hydrolysis catalyst accessible by the bulky cellulose limits its efficiency in the conversion and utilization of biomass-based resources. In this work, high surface area WZr/SBA-15 catalysts (>400 m 2 /g) were prepared by hydrothermal method and characterized using XRD, N 2 adsorption, TEM, Raman, UV–vis, XPS and FTIR of pyridine adsorption. The results showed that doping a moderate amount of ZrO 2 into the WO 3 /SBA-15 catalyst stabilized the tungstate species in the form of a polytungstate species as a result of the strong ZrO x -WO x interaction as well as increased the surface area of the catalyst. The resulting polytungstate species provided strong Brønsted acid sites for hydrolysis. Consequently, the cellobiose conversion was maximized at 5% ZrO 2 loading, corresponding to a maximized surface area and density of Brønsted acid sites. This catalytic activity is significantly higher than that of a WO 3 /ZrO 2 catalyst prepared using the conventional impregnation method, indicating the importance of mesoporous structure to the dispersion of active species and to the accessibility of the active sites by the bulky reactant. This result indicates that the density of the strong Brønsted acid sites with improved accessibility by the bulky reactant is essential to achieve a high hydrolysis activity.
研究领域:
化学工程
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催化材料
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 3
·763-768
·
IF 2.726
Li Yangbei,Liu Shaojia,Zhao Hewei,Guo Lin
High strength and high toughness are vital for fibers’ engineering applications, but are hard to simultaneously achieve. Herein, we synthesize a carbon nanotube(CNT)-thermoplastic polyurethanes(TPU) fiber reinforced by an amorphous ZrO 2 layer through the wet-spinning method. The amorphous ZrO 2 layer is in-situ grown on the surface of CNT and the hybrid nanowires are orientedly aligned with TPU to form the ternary fiber. The fiber possesses an excellent combination of high strength(84.6 MPa) and toughness(126.7 MJ/m 3 ), which is outstanding when compared with previously reported CNT-TPU fibers. The pull-out of nanowires attributed to the oriented alignment structure and the enhanced interface and restriction of deformation obtained from the amorphous ZrO 2 layer are considered as the primary strengthening and toughening mechanisms. We anticipate that our fiber synthesis strategy gives a new path to design strong and tough fibers.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Ailing Bai,Hao Song,Gaoyin He,Qingsong Li,Chong Yang,Limei Tang,Yingmin Yu
Abtract Here, a simple and reproducible method for the preparation of a well-defined zirconia@silica core–shell nanostructure is described. We studied the morphology, size, and composition of prepared nanoparticles (NPs) by transmission electron microscopy , scanning electron microscopy, dynamic light scattering, Fourier transform infrared spectroscopy , X-ray diffraction, and energy-dispersive spectroscopy. ZrO 2 NPs were synthesized through a novel alcohol–water mixed system using ZrOCl 2 ·8H 2 O as the zirconium source under mild hydrothermal conditions (110–120 °C). These NPs were then used as the core for the deposition of a silica shell via a modified Stöber method, resulting in uniform core–shell ZrO 2 @SiO 2 composites with a tunable silica shell thickness and controllable core morphology. In addition, the effect of the agent polyvinylpyrrolidone (PVP) on the formation of the core–shell structure was investigated in detail. The results demonstrated the PVP played a critical role in stabilizing the NPs and enhancing the affinity between SiO 2 and ZrO 2 .
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 8
·1744-1751
·
IF 2.578
Zhongyang Wang,Ali Hasnain,Xujun Sun,Ying Han,Dongshun Liu,Xiaohua Tan,Xiang-Kui Ren,Yakai Feng
In recent years, fluorescent carbon dots (CDs) have been developed and showed potential applications in biomedical imaging and light-emitting diodes (LEDs) for their excellent fluorescent properties. However, it still remains a challenge to incorporate fluorescent CDs into the host matrix in situ to overcome their serious self-quenching. Herein, a one-pot hydrothermal method is used to prepare nano-zirconia with CDs (CDs@ZrO 2 ) nanoparticles. During the reaction, CDs and nano-zirconia are generated simultaneously and connected with silane coupling agent. The CDs@ZrO 2 nanoparticles exhibit tunable emission wavelength from 450 to 535 nm emission by regulating the content of citric acid in the feed. The quantum yield of the CDs@ZrO 2 is up to 23.8%. Furthermore, the CDs@ZrO 2 nanoparticles with regulable fluorescence emission can be used for the fluorescent material to prepare white LEDs. The prepared LED has significant white light emission with color coordinates of (0.30, 0.37) and its color rendering index (CRI) is 67.1. In summary, we have developed the solid-state CDs@ZrO 2 nanoparticles with tunable emission by a valuable strategy, that is, one-pot method, for white LEDs.
研究领域:
材料科学
·
光学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Bohan Wang,Wenjun Yu,Le Fu
Given the pressing clinical need, the market for artificial bone scaffolds in orthopedics is growing at a rapid rate. In the past, ZrO 2 -based biomaterials intended for implantation were dense and ‘bio-inert’. Material scientists have now shifted toward the design of deliberately porous and ‘bioactive’ ZrO 2 -based biomaterials that integrate with human cells and tissues. In this study, we designed and prepared porous and bioactive ZrO 2 –SiO 2 nanocrystalline ceramics. The phase composition, microstructure, pore formation mechanism, and ion release behaviors of the ceramics were explored. The ceramics showed a hierarchical porosity , consisting of connected macropores (∼100 μm or larger) and micropores (∼1 μm). The spherical macropores were formed by a pore-forming agent method, and the irregular micropores were formed because of incomplete densification. The bioactive dopants (Ca and Sr) acted as a destabilizer of tetragonal ZrO 2 . Ca, Si, and Sr ions continuously released from the surface of the samples, providing good bioactivity for the ceramics. The porous and bioactive ceramics show great potential to be used as artificial bone scaffolds.
研究领域:
材料科学
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生物医学工程
·
骨科研究
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DOI
高影响因子
危险品化学品经营许可证（带存储）