JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Yuxuan Liao,Yifei Dai,Yifan Zhai,Aoping He,Huan He,Tianquan Liang
The effect of Sc 2 O 3 content on the corrosion behaviors of x Sc 2 O 3 -3.5Y 2 O 3 co-doped ZrO 2 (ScYSZ, x = 4.5, 5.5 and 6.5 mol.%) in calcium-magnesium-alumino-silicate (CMAS) at 1300 °C was investigated in this paper. It is shown that the ScYSZ ceramic exhibits better resistance to molten CMAS attack when doping with more Sc 2 O 3 . The CMAS penetration depth in the ScYSZ ceramic decreases with increasing Sc 2 O 3 . It is about 18 µm of CMAS penetrated depth in the 6.5Sc3.5YSZ after corrosion for 4 h at 1300 °C, including an 11 µm and 7 µm for the reaction-reprecipitation and grain-boundary infiltration layers, respectively. High thermochemical stability and weak reactivity of the ScYSZ to the glassy CMAS melt are beneficial to enhance the high temperature corrosion resistance, attributing to the low solubility in molten CMAS and the weak affinity to Ca 2+ for small ionic radius Sc 3+ . The mechanism of enhancing the resistance to CMAS is discussed.
研究领域:
材料科学
·
腐蚀科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Meng Zhang,Junfeng Zhang,Yingquan Wu,Junxuan Pan,Qingde Zhang,Yisheng Tan,Yizhuo Han
Carbon deposition on the catalyst surface has been considered as one of the main reasons to cause Ni catalyst deactivation during methane reforming with carbon dioxide (DRM). Generally, it is thought that the properties and levels of coke formation are significantly affected by the ability of CO 2 adsorption and activation, which is closely related to the oxygen species over catalyst surface. In this study, the effects of oxygen species on the DRM over Ni/ZrO 2 catalysts were investigated. Wherein, ZrO 2 support was further treated under H 2 , N 2 , and O 2 atmospheres respectively to obtain different oxygen species distribution over the surface, and 3 wt.% Ni was introduced by the deposition-precipitation method. The representative samples were characterized using XRD, EPR, XPS, FTIR, TPR, TPD , TPSR, TG, Raman and TPH techniques, etc. It was found that the treatment to ZrO 2 in the reducing gas such as H 2 was able to promote the formation of adsorbed oxygen species over the surface. CO 2 DRIFTS and CH 4 -TPSR experiments further confirmed that adsorbed oxygen species were favorable for enhancing both CO 2 adsorption and activation and CH 4 dissociation. As a result, the catalyst with more adsorbed oxygen species exhibited relatively outstanding performance for the DRM and promotional ability in removal of the deposited carbon.
研究领域:
催化化学
·
能源材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Enbo Li,Yu Bai,Peng Zhang,Hongxia Liu,Wen Ma,Yingwei Qi,Te Wang,Ziqian Zhang,Sinan Gao
Electronic structure adjustment on materials' surfaces often leads to materials obtaining novel performances. Flake Al powder is a classical low infrared emissivity material at room temperature. However, this powder shows intense infrared radiation over 500 °C due to its high-temperature oxidation , which restricts flake Al powder's application as low infrared radiation material in higher temperatures. For this reason, the Al@ZrO 2 composite was prepared by a solvothermal method to improve its thermostability. This composite can be used as low infrared radiation material over 500 °C for the long term, even at 700 °C for a short time. According to the experimental and theoretical investigation, a delocalization bond of Al–O–Zr is formed in the interface between the Al surface and ZrO 2 so that the Al surface's electronic structure is adjusted. This change of electronic structure weakens the electroaffinity of Al atoms to bond with the electron-rich groups, and the oxidation reaction of Al needs to proceed in a higher-temperature range. In this case, flake Al powder coating with ZrO 2 holds its metal properties with low infrared emissivity over 500 °C. The Al@ZrO 2 composite could be used in a higher temperature range as a low infrared radiation material.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2013
·
IF 1.913
Weimin Du,Zhaoqiang Zhu,Xiaofen Zhang,Dacheng Wang,Donghe Liu,Xuefeng Qian,Jimin Du
Zirconia modified by Samarium/Europium, RE/ZrO 2 (RE = Sm , Eu ), composite oxide nano-materials have been successfully synthesized by improved sol–gel method. Characterization results show that X-ray diffraction (XRD) peaks of products gradually shift to the lower angle with the increase of rare earth which implies that the lattice distances of RE/ZrO 2 nano-materials are gradually enlarged. Moreover, the molar ratios between zirconium and rare earth are consistent with the chemical formula and both of them are uniformly distributed in samples. Optical properties indicate that defect structures and electron configurations of RE/ZrO 2 (RE = Sm , Eu ) with single phase determine their absorption properties on visible light. Photocatalytic experiments indicate Zr 0.8 Sm 0.2 O 2− δ nano-crystals have excellent visible-light-responsive photocatalytic activities on Methylene blue and Rhodamine B which results from the special defect structure, suitable electronic configuration, and larger specific surface area. It follows that Zr 0.8 Sm 0.2 O 2− δ nano-crystals are new visible-light-responsive photocatalysts which can be applied in dye wastewater treatment and environmental protection in the future.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ENERGY
·
2019
·
IF 8.426
Zain Ali Saleh Bairq,Hongxia Gao,Yufei Huang,Haiyan Zhang,Zhiwu Liang
A significant impediment to the widespread adoption of amine-based post-combustion technique for CO 2 capture from flue gas is the huge energy demand for amine solvent regeneration. In this study, five novel bifunctional heterogeneous catalysts e.g., SO 4 2− /ZrO 2 /SiO 2 with different molar ratios of zirconia and SO 4 2− /ZrO 2 as a parent catalyst were synthesized and applied to evaluate their effectiveness in enhancing the CO 2 desorption and solvent regeneration of 5M monoethanolamine solution with CO 2 loading of 0.5 ± 0.01 mol CO 2 /mol monoethanolamine at 97 °C. The catalysts were characterized by Fourier transform-infrared spectrometry, pyridine-infrared spectroscopy, X-ray diffraction, N 2 -adsorption-desorption, and ammonia-temperature programmed desorption. The results demonstrated that these catalysts can significantly reduce the heat duty for CO 2 desorption by 36.48% compared to without catalyst and enhance desorption rate by 35.1%. The results also showed that SO 4 2− /ZrO 2 /SiO 2 15% presented the highest efficiency compared to the other SO 4 2− /ZrO 2 /SiO 2 ratios and the super solid acid catalyst SO 4 2− /ZrO 2 . Additionally, to investigate if the catalysts induce any unfavorable effects on the amine, the absorption of CO 2 by regenerated amine solvent was studied. Finally, a reaction mechanism for the amine solvent regeneration with the synthesized catalyst e.g., SO 4 2− /ZrO 2 /SiO 2 was suggested.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Lujia Han,Fengxia Yang,Qing Meng,Xiao Yang,Jiangtao Li
The heat flow density of electronic power devices is increasing, raising concerns about their safe operation, which necessitates high-performance radiative cooling coatings to improve thermal management. This paper presents the preparation of ZrO 2 /graphene composite powders with an encapsulated structure via the combustion reaction of Mg with CO 2 and ZrO 2 using as a diluent. A passive radiative cooling coating with an emissivity of 0.97 was developed using ZrO 2 /graphenet composite powders and silicon fluoride (SiF) resin. At 50 wt% filler content, the thermal conductivity of the coating reached 4.6 W m −1 K −1 , an increase of 27.8% compared to the coating prepared with mechanically mixed ‘ZrO 2 +graphene’ powders. This improvement could be attributed to the ZrO 2 /graphene powders with encapsulated structure forming a phonon transport network in the coating. Heat dissipation tests of coated Al heat sinks demonstrated that the cooling efficiency increased from 8.2% to 15.0% as the thermal conductivity of the coating increased from 3.6 W m −1 K −1 –4.6 W m −1 K −1 . This result indicates that simultaneously achieving high thermal conductivity and high emissivity of the coating could significantly enhance the heat dissipation of the heat sink.
研究领域:
材料科学
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Gang Yu,Kuo Han,Jing Wang,Xiao Cheng,Hongmei Ma,Hongya Wu,Zhigang Yang,Guanglei Zhang
In the present work, the activated carbon fibers (ACFs) with homogenous and crystalline CeO 2 -ZrO 2 coatings were obtained using a facile water steam treatment process at a low temperature (300 °C) for efficient removal of Pb(II) from aqueous solutions. The morphology, surface chemical states, and adsorption performance were studied extensively. Results demonstrated that the steam-treated CeO 2 -ZrO 2 /ACFs possessed superior high surface areas (783.23 m 2 g −1 ) and pore volumes (0.41 cm 3 g −1 ). Moreover, numerous C-O-M bonds formed in the interface between CeO 2 -ZrO 2 coatings and ACFs, which can endow the adsorbent desired mechanical property and service durability as well as many surface hydroxyl groups were found and adsorption capacity (61.54 mg g −1 at pH 6.5 ± 0.3 and 25 °C). It was suggested that the steam-treated CeO 2 -ZrO 2 /ACFs could be considered as a promising adsorbent towards wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Shouding Wu,Yaqiang Dong,Ronglin Zhao,Xubin Li,Hang Wu,Wei Gao,Aina He,Jiawei Li,Xincai Liu
In this study, core-shell structured FeSiBCCr@SiO2&ZrO2 amorphous magnetic powder cores (AMPCs) were successfully prepared by the sol-gel method using tetraethyl orthosilicate (TEOS) and zirconium oxychloride hydrate (ZrOCl2·8H2O) as raw materials. The growth mechanism and potential chemical reactions of the SiO2&ZrO2 mixed insulation layer were analyzed by XRD , XPS and SEM‒EDS. In addition, the effect of the insulation layer content on the soft magnetic properties of FeSiBCCr@SiO2&ZrO2 AMPCs was systematically investigated. The SiO2&ZrO2 insulation layer can significantly increase the resistivity, effectively improve the DC bias performance and reduce the core loss of AMPCs. S2* (1.2 mL TEOS and 1.4 g ZrOCl2·8H2O) had a minimum core loss of 2290 mW/cm3 at high frequency (50 mT, 1 MHz). It had a high effective permeability of 48.2 and a superior direct current (DC) bias performance of 77.9% at 8 kA/m. This study provides a valid method to practically produce SMPCs with high resistivity, low core loss at high frequency and excellent DC bias performance through a novel insulation coating process .
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2019
·Vol. 12
·期 21
·3637
·
IF 2.972
Runqiang Liu,Yashuang Wang,Bo Li,Binbin Liu,Huina Ma,Dongdong Li,Li Dong,Fang Li,Xiling Chen,Xinming Yin
In this work, a carbon black (VXC-72R)/zirconia (ZrO2) nanocomposite-modified glassy carbon electrode (GCE) was designed, and a VXC-72R/ZrO2/GCE-based electrochemical sensor was successfully fabricated for the high-sensitivity detection of methyl parathion (MP). Electrochemical measurements showed that the VXC-72R/ZrO2/GCE-based electrochemical sensor could make full use of the respective advantages of the VXC-72R and ZrO2nanoparticles to enhance the MP determination performance. The VXC-72R nanoparticles had high electrical conductivity and a large surface area, and the ZrO2nanoparticles possessed a strong affinity to phosphorus groups, which could achieve good organophosphorus adsorption. On the basis of the synergistic effect generated from the interaction between the VXC-72R and ZrO2nanoparticles, the VXC-72R/ZrO2/GCE-based electrochemical sensor could show excellent trace analysis determination performance. The low detection limit could reach up to 0.053 μM, and there was a linear concentration range of 1 μM to 100 μM. Such a high performance indicates that the VXC-72R/ZrO2/GCE-based electrochemical sensor has potential in numerous foreground applications.Keywords:VXC-72R/ZrO2/GCE nanocomposite electrode;synergetic effect;electrochemical sensor;methyl parathion
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 4
·668
·
IF 5.719
Qingyun Li,Lingyu Liu,Zihua Wang,Xuezhong Wang
A confined jet mixing reactor operated in continuous hydrothermal flow synthesis was investigated for the synthesis of CeO2-ZrO2(CZ) nanoparticles. The obtained ultrafine powders were characterized using scanning electron microscopy–energy dispersive spectrometry (SEM-EDS), inductively coupled plasma–atomic emission spectroscopy (ICP-AES), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction analysis (XRD), transmission electron microscopy (TEM) coupled with selected area electron diffraction (SAED), a BET (Brunauer-Emmett-Teller)-specific surface area test and pore analysis, oxygen storage capacity (OSC) test, and a H2temperature programmed reduction (H2-TPR) test. The XRD results show that all samples were composed of high-purity cubic CZ nanoparticles. High resolution transmission electron microscope (HR-TEM) analysis showed that CZ nanoparticles with uniform size and shape distributions were obtained in this investigation. The d-spacing values, determined based on the TEM-selected area electron diffraction (SAED) patterns, were in good agreements with the reference data. BET results showed that the prepared CZ samples had large specific surface areas. Pore volume and size distribution were obtained by pore analysis. Oxygen pulse adsorption technology was used to test the oxygen storage capacity of the sample. The redox capacity of the CZ material was determined by a H2temperature-programmed reduction test.Keywords:continuous hydrothermal flow synthesis;confined jet mixing reactor;CeO2-ZrO2nanoparticles;XRD;BET
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Mao chen,Fan Zhang,Hailong Wang,Gang Shao,Bingbing Fan,Rui Zhang,Hongxia Li,Yongqiang Chen
The dense h-BN/ZrO 2 (30 wt%) composites without additives were rapidly fabricated by spark plasma sintering . The relative density, apparent porosity, fracture toughness, flexural strength , phase composition and microstructure of h-BN/ZrO 2 composites were systematically investigated. Besides, the corrosion resistance of h-BN/ZrO 2 composites in molten steel was also studied in detail. Especially, the h-BN/ZrO 2 composites were sintered at 1800 °C exhibiting a relative density of 96.6% and the flexural strength of ≈ 157 MPa. The corrosion of h-BN/ZrO 2 composites was mainly due to the oxidative decomposition of BN, and the corrosion process was clarified by a parabolic law. The excellent corrosion resistance of the h-BN/ZrO 2 composites was attributed to ZrO 2 residual layer formed at the interface. The corrosion thickness of h-BN/ZrO 2 composites was only ∼116 µm even using the longest corrosion time (80 min). The composites could be a promising candidate material applied to fabricated thin strip continuous casting side sealing plates.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Shouzhen Li,Xiaota Cheng,Guangting Han,Yang Si,Yitao Liu,Jianyong Yu,Bin Ding
Developing ceramic nanofibrous membranes for the thermal insulation layer of firefighting protective clothing is vital. However, previous ceramic nanofibrous membranes were brittle and easy to break during service in high-temperature environments. The lack of elastic and compressible properties has limited the high-end applications of ceramic nanofibrous membranes. In this work, elastic and compressible Al 2 O 3 /ZrO 2 /La 2 O 3 nanofibrous membranes were fabricated via sol–gel electrospinning and calcination in air at different temperatures. The as-fabricated Al 2 O 3 /ZrO 2 /La 2 O 3 nanofibrous membranes can maintain excellent elasticity and compressibility in the temperature ranging from −196 to 1400 °C. Moreover, they have low thermal conductivity and high working temperatures. These favorable characteristics make the Al 2 O 3 /ZrO 2 /La 2 O 3 nanofibrous membranes a promising candidate for the thermal insulation layer of firefighting protective clothing.
研究领域:
材料科学
·
纳米技术
·
防火工程
✓ 已验证
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）