JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Mao Chen,Bingbing Fan,Haoyuan Lei,Zijie Song,Shaojun Zhang,Hailong Wang,Rui Zhang,Hongxia Li,Yongqiang Chen
Large size high density h-BN/ZrO 2 composites (ø = 110 mm, h = 15 mm) were rapidly prepared by spark plasma sintering (SPS) with sintering cycle 20 min. The effects of additives on the mechanical properties , microstructure evolution, and corrosion resistance of the h-BN/ZrO 2 composites were studied. The Al 2 O 3 , MgO , SiO 2 , La 2 O 3 and ZrO 2 rapidly formed heterogeneous eutectic crystals under the action of SPS. The low eutectic compounds significantly promoted the diffusion of h-BN or ZrO 2 , also increased the density. The flexural strength of h-BN/ZrO 2 composites could reach 196.31 MPa, and the apparent porosity was only 0.42 %. The additives are combined with zirconia to form a high viscosity eutectic, whose corrosion resistance to molten steel is obviously better than that of single ZrO 2 . The corrosion depth of h-BN/ZrO 2 composites was only 114 µm after corroded in molten steel at 1550 °C for 80 min. The comprehensive properties of h-BN/ZrO 2 composites were obviously improved by appropriate additives.
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
Materials Research Express
·
2025
·Vol. 12
·期 8
·085101
·
IF 2.2
Yao Liu,Jinqiang Zhou,Jianwei Zhang,Jianguo Cheng,Lina Zhan
The attenuation coefficient of ultraviolet UV light is a critical factor influencing the mechanical properties of photocurable ceramics. Aiming to fabricate high-precision and high-performance ZrO2 ceramics, this study systematically investigates the impact of the UV attenuation coefficient on the polymerization kinetics of ZrO2 ceramic slurries. Through linear fitting, the absorption and scattering coefficients of the ZrO2 slurry were determined as 66 cm−1. By integrating the Beer-Lambert law, we further validated how the UV attenuation coefficient affects the variation in C=C double bond conversion within the cured slurry layers. Additionally, based on Mie scattering theory, although the incident energy was 52 mW cm−2 and slice thickness was 50 μm, the curing depth Cd and exposure energy In{E}_{o} is optimal. The ZrO2 ceramic was formed , in which the sintered sample density was 6.02 g cm−3 (99%).
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 23
·15927-15938
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IF 2.993
Xun Suhang,Hou Caozheng,Li Hongping,He Minqiang,Ma Ruliang,Zhang Ming,Zhu Wenshuai,Li Huaming
The catalyst of WO 3 highly dispersed on mesoporous ZrO 2 was prepared by hydrothermal treatment and calcination. Ionic liquid templates with different cations and various calcination temperatures were taken into account to investigate factors that affect the structure of the catalysts. Wide-angle XRD, Raman, low-angle XRD, N 2 adsorption–desorption, SEM, EDS-mapping and TEM analyses were employed to characterize the composition, morphology and the dispersion of WO 3 . It was found that [C 16 H 33 N(CH 3 ) 3 ] 4 SiW 12 O 40 and 700 °C were the optimal ionic liquid template and calcination temperature; the obtained catalyst, expressed as 700-C 16 -WO 3 /ZrO 2 , exhibited the best catalytic activity in oxidation desulfurization. Dibenzothiophene (DBT) in the model oil could be oxidized to DBT sulfone (DBTO 2 ) completely, certified by GC-MS analysis, under optimum conditions. The oxidative desulfurization efficiencies of different substrates catalyze by 700-C 16 -WO 3 /ZrO 2 , and the cycle performance on the oxidation of DBT were studied.
研究领域:
催化化学
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能源化学
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DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 34
·6436-6443
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IF 1.915
Meng-Ying Jiang,Yun-Qing Huang,Jie-Mei Chu,Quan-Fei Zhu,Jun Ding,Bi-Feng Yuan,Yu-Qi Feng
Glycosylation of small molecules is one of the most widespread modifications which involve various physiological functions in plants. However, the determination of glycosylated small molecules is still challenging due to their low abundance and serious matrix interference in biological samples. Here, we developed a strategy for comprehensive profiling of glycosylated small molecules in rice using magnetic zirconium dioxide (ZrO2)-based solid-phase extraction combined with liquid chromatography-high resolution mass spectrometry (MSPE-LC-HRMS) analysis. Optimization of several experimental parameters was carried out on standard glycosylated compounds. Our results showed that magnetic ZrO2 exhibited high specificity toward 1,2-cis-diol and 1,3-cis-diol glycosyl-containing compounds. With the developed MSPE-LC-HRMS strategy, we successfully identified 27 glycosylated small molecules in rice samples, and a significant content change was observed in 6 glycosylated small molecules between cadmium (Cd)-free and Cd-stressed rice.
研究领域:
植物学
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分析化学
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DOI
高影响因子
ENERGY & FUELS
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2020
·
IF 3.421
Yang Qu,Yuan Zhao,Shanshan Xiong,Chenguang Wang,Shurong Wang,Lingjun Zhu,Longlong Ma
5-Hydroxymethylfurfural (HMF) and levulinic acid (LA) are two important platform compounds that can be produced by the dehydration of hexoses from hydrolysis of cellulose. In this study, glucose dehydration was catalyzed by the SO42–/ZrO2 catalyst in the NaCl–THF/H2O biphasic solvent system. Complete conversion of glucose was achieved at 160 °C. The highest HMF yield and LA yield were 61.84% and 29.68%, respectively. The results showed that the conversion and product distribution were influenced by catalyst acidity, solvent composition, temperature, and time. The SO42– load greatly changed the acidity of the catalyst, thus affecting the product distribution. By changing the composition of the catalyst and the biphasic solvent system, different yields of HMF and LA could be obtained, so as to realize directional synthesis of the target products.
研究领域:
生物化学
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催化化学
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DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
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2023
·
IF 5.4
Lin Ge,Dong-Mei Huang,Qin-Chao Xu,Jing Shi,Shuai Chen
An innovative, high-performance, non-noble-metal-based oxygen reduction reaction (ORR) catalyst must be developed utilizing a new and cost-effective technique. ZrO 2 has the merits of high stability, low toxicity, good catalytic activity, and low enthalpy for atomic oxygen adsorption. However, the poor conductivity restricts its application as an ORR catalyst. Here, we successfully prepared ZrO 2 nanoparticles / nitrogen-rich two-dimensional carbon nanosheet composites as ORR catalysts using a straightforward, solvent-free, one-step pyrolysis approach. Due to the unique component and structure characteristics, ZrO 2 @N-C-900 demonstrates remarkable ORR performances in alkaline electrolytes, such as high half-wave potential (0.82 V vs. RHE), higher current density (J L = 6.4 mA cm −2 ), and outstanding long term stability (95 % for 36,000 s). Especially, when used in a Zn-air battery, ZrO 2 @N-C-900 exhibited a power density of 148 mW cm −2 , exceeding that of 20 % Pt/C.
研究领域:
材料科学
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电化学
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高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Xiaoli Jin,Jiaheng Wang,Shuai Wang,Yulong Cao,Anchun Fang,Qingwei Wang,Jiaxu Gong,Yatang Dai
It is still an urgent task to design metal coatings for the development of corrosion resistance . Herein, Pb-Co-ZrO 2 coating is fabricated on the surface of aluminum plates via one-step pulsed electrodeposition for corrosion resistance. The pulse frequency, current density and duty cycle are 800 Hz, 15 mA cm −2 and 20 %, respectively. In this work, the concentration of ZrO 2 nanoparticles in the bath is the main operating variable. We further explored the deposition mechanism of the nanocomposite coating and demonstrated its application potential in corrosion resistance. As expected, the corrosion resistance and mechanical properties of the coatings increased and then decreased with the increase of the concentration of ZrO 2 nanoparticles in the plating solution. When the concentration of ZrO 2 nanoparticles in the plating solution was 15 g L −1 , the Pb-Co-ZrO 2 nanocomposite coating exhibited excellent corrosion resistance in 3.5 wt% NaCl solution, with an impedance modulus value (5182 Ω cm 2 ) that was eight times higher than that of the pure Pb coating (669 Ω cm 2 ), possessed the highest corrosion potential (- 0.60 V) and the lowest corrosion current density (3.6 μA cm −2 ), while also exhibiting excellent mechanical properties. The mechanism of the improved corrosion performance of the Pb-Co-ZrO 2 composite coatings was further explained using DFT calculations. The results show that the coupling between the interface of Pb-Co solid solution and ZrO 2 nanoparticles effectively improves the overall electron figure of merit of the coatings and triggers an obvious electron localisation, which increases the energy required for the interfacial electrons to escape from the coating interface.
研究领域:
材料科学
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腐蚀与防护
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 9
·6422-6438
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IF 3.5
Wenjun Yu,Zihua Lei,Xiaoyu Zhang,Qinzhao Zhang,Yongxing Cheng,Ying Deng,Yang Li,Junjie Song,Le Fu
Ceramics can be traditionally classified as structural and functional ones. However, the miniaturization and multi-functionalization of various devices require ceramics to have both structural and functional properties. In this work, we aimed to develop structure-function integrated ZrO 2 –SiO 2 nanocrystalline glass–ceramics (NCGCs) by in situ formation of homogenously distributed amorphous carbon. By reducing the calcination temperature of carbon-containing powder, organic carbon groups were partially retained in the powder and they transformed to amorphous carbon in the sintered NCGCs. At micrometer scale, the carbon was homogenously distributed in the NCGCs, avoiding the commonly encountered agglomeration problem of carbon fillers. The effects of carbon on the microstructure, mechanical properties, wear resistance, and dielectric properties of the NCGCs were investigated. Results showed that the in situ formed amorphous carbon was homogenously distributed in the ZrO 2 nanocrystallites. Meanwhile, the amorphous carbon strongly bonded with the ZrO 2 –SiO 2 NCGCs. Only a small amount of carbon was combusted even after annealing at 1000°C for 3 h. The formation of amorphous carbon led to an improvement of nanohardness and wear resistance of the NCGCs, while slightly reducing Young's modulus and flexural strength. The electromagnetic wave transmission performances were improved due to the formation of amorphous carbon. The current study paves a new way for developing structure-function integrated glass–ceramics through in situ formation of carbon. The prepared structure-function integrated ZrO 2 –SiO 2 NCGCs have great potential to be used as radome and antenna windows of aerospace aircrafts that work in harsh environment.
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Qianchun Zhang,Qin Zhou,Shan Tang,Yuxian Zhao,Yuguo Zheng,Li Jiang
Novel sugar-coated haws-sticklike Au/ZrO 2 nanofibers were fabricated by a solvothermal method using a simple precipitation approach. The nanostructure , surface morphology , and elementary composition of the Au/ZrO 2 nanofibers were explored by X-ray diffractometry, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy , N 2 adsorption-desorption isotherms, and energy dispersive spectroscopy . The unique sugar-coated haws sticklike structure with multiple crystal faces (111) as active sites enhanced greatly cataluminescence property for propanal , and the developed propanal sensor based on Au/ZrO 2 nanofibers demonstrated good analytical characteristics with super-fast detection, high sensitivity, and selectivity. The response and recovery time were 1 and 5 s, respectively, the useable linear range was 0.181–38.8 mg/m 3 with a low limit of detection of 0.060 mg/m 3 , and the stability was proved to be fairly excellent for at least 120 days. Besides, the sensor was successfully applied to the analysis of propanal in real samples, and satisfactory recoveries (90.1–109%) with RSDs of 2.6–8.4% were achieved. Moreover, the cataluminescence sensing mechanism was further investigated by density functional theory and GC/MS analysis. The developed methodology has broad application prospects for the detection of propanal at low concentrations.
研究领域:
纳米材料科学
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分析化学
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环境监测
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DOI
高影响因子
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
·
2019
·Vol. 64
·期 11
·1464-1468
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IF 0.822
Kangkang Yuan,Jin Xiaotong,Wang Xinqiang,Zhang Guanghui,Zhu Luyi,Xu Dong
Abstract ZrO 2 ceramic fibers have gained widespread study for the high temperature stability, low thermal conductivity and high mechanical properties. While for oxide fibers, grain growth is one of the limiting factors for long-term high temperature applications. In the present study, polycrystalline ZrO 2 –6 mol % Y 2 O 3 ceramic fibers with the addition of ~0–5 mol % La 2 O 3 to refine the grain size were fabricated by the dry-spinning method. The XRD and Raman spectral results showed that the pyrochlore La 2 Zr 2 O 7 phase was formed as a second phase in the tetragonal zirconia fiber matrix. The formation of a second phase was an effective way to hinder grain growth for the competition phase effect and solid solution mechanism. With the addition of La 2 O 3 , the grain size decreased and concentrated in a smaller range of 50–250 nm compared with the ZrO 2 –6 mol % Y 2 O 3 matrix at 1400°C. Furthermore, the thermal conductivity of the fibers decreased with the additive of La 2 O 3 less than 3 mol %. The present system is a promising candidate for high temperature applications.
研究领域:
材料科学
·
陶瓷材料
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高温材料
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纤维材料
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DOI
高影响因子
RSC Advances
·
2013
·Vol. 3
·期 26
·10277-10284
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IF 2.562
Xing Tang,Lei Hu,Yong Sun,Geng Zhao,Weiwei Hao,Lu Lin
A green and efficient process was developed for the conversion of biomass-derived ethyl levulinate (EL) into γ-valerolactone (GVL) using supercritical ethanol as the hydrogen donor and the reaction medium over low-cost and eco-friendly ZrO2 catalysts, which were prepared by the precipitation method and characterized by BET, SEM, XRD, FT-IR, TGA-DTA, TPD-NH3 and TPD-CO2. The results indicated that amorphous ZrO2 with a high specific surface area and a large number of acid–base sites exhibited the highest catalytic activity, an excellent GVL yield of 81.5% with 95.5% EL conversion was achieved at 523 K over 3 h. In addition, combined with the results of poisoning experiments, a plausible mechanism of catalytic transfer hydrogenation (CTH) via a six-membered ring transition state was also presented.
研究领域:
生物质化学
·
催化反应工程
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Wenbin Qu,Lixin Song,Guixiang Peng,Xiaoli Shao,Yang Wang,Pingfan Du,Jie Xiong
Petroleum-derived PET plastics and fibers are widely used in packaging and textile applications due to their superior properties and have become a major source of plastic waste. In this study, Ni 2 P-Co x P/ZrO 2 /C NFs p-n heterojunction photocatalytic system with the UiO-66-NH 2 metal-organic backbone (MOFs)-derived ZrO 2 (U-ZrO 2 ) was constructed by a combined method of electrospinning, carbonization, hydrothermal, and phosphorization process. Carbon nanofibers are used as carriers to combine the different components effectively. The Ni 2 P-Co x P/U-ZrO 2 /C NFs show strong light absorption ability throughout the entire visible light region. The needle-shaped structure formed by Ni 2 P-Co x P can provide abundant active sites, increase the reflection of light on the fiber surface, and promote the utilization of light by the photocatalyst. With the incorporation of the MOF structure, the specific surface area of the fibers was greatly enhanced. The coupling of Co x P with Ni 2 P and U-ZrO 2 establishes a p-n heterojunction at the photocatalytic interface, which promotes the separation efficiency of photogenerated carriers and prolongs the charge lifetime while maintaining the strong redox capacity of the catalyst, enhancing the photocatalytic degradation activity. The MOF-derived ZrO 2 still maintains an octahedral shape, which favors the attachment of Ni 2 P and Co x P. As a result, the hydrogen production of the system reached 303.64 μ mo l H 2 g Sub − 1 after 24 h, and the weight loss rate of PET reached 18.77 ± 4.28%. Besides, the reusability of the catalyst was greatly improved by re-phosphorization of the used catalyst, which enables it to recover its catalytic degradation efficiency. This work provides new insights into the rational design of heterojunction photocatalysts with superior degradation performance.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）