JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 17
·14971-14980
·
IF 2.324
Zhu Jianjun,Ma Lirong,Feng Jin,Geng Tianli,Wei Wei,Xie Jimin
In this paper, the X% Cu–ZrO 2 (X = 0, 1, 5, 10, 15 and 20) xerogel catalysts have been successfully synthesized via a facile two-step approach involving epoxide-driven sol–gel method followed by chemical reduction. The series xerogel catalysts were characterized using XRD, SEM–EDS, TEM, XPS, H 2 -TPR, N 2 adsorption–desorption and FT-IR. The results showed that the morphologies of ZrO 2 partly have changed from bulk to nanorods with the increase in Cu loading from 0 to 20%. The catalysts exerted Cu content-dependent activities towards the catalytic hydrolysis of ammonia borane (AB). Among them, the 15% Cu–ZrO 2 showed the best catalytic activity that the maximum hydrogen generation rate was 0.384 mol min −1 . The hydrolysis reaction towards AB was proved to the first order by the 15% Cu–ZrO 2 xerogel by kinetic studies. The activation energy was calculated to be 22.34 kJ mol −1 . Even after five recycle experiment, the catalysts also showed a good recycle stability in aqueous solution.
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
PROGRESS IN NUCLEAR ENERGY
·
2015
·
IF 1.119
Junchuan Zhao,Xingeng Ding,Cheng Meng,Chunrong Ren,Huiqin Fu,Hui Yang
The novel SiO 2 –ZrO 2 -calcium alginate aerogels were prepared by Sol–Gel process with phase separation method for investigating the adsorption and immobilization performance of the plutonium and minor actinides from high-level liquid waste (HLLW). The materials contained porous network structure with high surface area (233.44–481.08 m 2 /g) and pore volume (0.50–1.26 m 3 /g). The aerogels were superior adsorbents for the removal of plutonium and minor actinides, the maximum adsorption capacity and adsorption rate (35 °C, 75 rpm) reached 231.5 mg/g and 99.2%. For all the waste forms, SiO 2 , ZrO 2 and Ca 2 SiO 4 phases were simultaneously observed in the matrix. Moreover, Ce entered into Ca sites of Ca 2 SiO 4 and Zr sites of ZrO 2 . The substitution of Ca and Zr by Ce in the Ca 2 SiO 4 and ZrO 2 implies a promising disposal measure of actinides.
研究领域:
材料科学
·
核化学与放射化学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Fukun Bi,Xiaodong Zhang,Shang Xiang,Yunyun Wang
The effect of Pd loading (0.25, 0.5 and 1.0 wt%) and ZrO 2 support calcined at diverse temperatures (600, 700 and 800 °C) by pyrolysis of UiO-66 was investigated for CO oxidation in this work, respectively. The physicochemical properties of the samples were characterized by various characterization methods. The XRD results exhibited that all ZrO 2 support possessed mixed crystalline phase, the monoclinic ZrO 2 and tetragonal ZrO 2 . And the calcination temperature had a big impact on the composition of ZrO 2 supports. Pyrolysis of UiO-66 at high temperature was favorable for the formation of monoclinic ZrO 2 . Additionally, the introduction of Pd was induced the phase conversion from tetragonal to monoclinic of ZrO 2 . The order of catalytic efficiency was as follows: 0.5Pd/Zr-700 > 0.5Pd/Zr-600 > 0.5Pd/Zr-800. Moreover, 0.5Pd/Zr-700 presented high stability and great reusability. The good catalytic performance of 0.5Pd/Zr-700 was ascribed to the better reduction ability at low temperature and high O ads /O lat and Pd 0 /Pd 2+ on the surface. Importantly, the reaction pathway of CO oxidation over the 0.5Pd/Zr-700 was exposed.
研究领域:
催化化学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Longfei Zhang,Luhong Zhang,Yongli Sun,Bin Jiang
Cobalt-based perovskite material, an effective activator of PMS, is widely employed for wastewater remediation, but still affected by the leakage of the cobalt ions. In this study, a porous core-shell structured perovskite LaFe 0.1 Co 0.9 O 3-λ /SiO 2 core @ZrO 2 shell (LFCS@ZrO 2 ) was fabricated and partially etched to enlarge channels to further enhance mass transfer ability. The well-designed core-shell structure can not only restrain metal ion leaching by changing the surface microenvironment but also provide an additional driving force attributed to the enriched concentration gradient, thus enhancing the catalytic oxidation performance. Results showed that the partially etched LFCS@ZrO 2 (eLFCS@ZrO 2 ) particles exhibited an increased pore size and showed an attractive catalytic performance as well as a suppressed cobalt ion leaching (3.61 to 0.67 mg/L). Over 99% of tetracycline hydrochloride (20 mg/L) could be degraded in 15 min, and the reaction rate increased 2 folds compared with pristine LaFe 0.1 Co 0.9 O 3-λ . Besides, quenching test and electron paramagnetic resonance analysis proved that sulfate radicals and singlet oxygen were the two predominant reactive oxygen species during the catalytic oxidation. This work provides a novel perspective for the fabrication of an environmentally friendly perovskite catalyst, which has a great potential application in organic pollutant degradation.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Liyu Chen,Jiaxin Yang,Yifan Zhang,Shaohua Wu,Youjian Yang,Wenju Tao,Zhaowen Wang
The synthesis of an Al–Zr master alloy in KF–AlF 3 –ZrO 2 molten salt by combining aluminothermic reduction and molten salt electrolysis processes was studied. The effects of reduction parameters such as stirring, reaction time, Al/ZrO 2 mass ratio and temperature on the Zr content and Zr recovery rate were studied and optimized. Under the optimal conditions of stirring, reaction time of 4 h, Al/ZrO 2 mass ratio of 3 and temperature of 960 °C, an Al–Zr master alloy can be obtained with a Zr content of 6.78 wt% and Zr recovery rate of 29.85%. The characterization results of the alloy show that the main phases contain Al and Al 3 Zr. And the Al 3 Zr appears as long rod-shaped or tetragonal shapes, which influenced by the Zr content and cooling rate. In addition, the reduced molten salt is electrolyzed to further extract Zr from the molten salt. The results show that the Zr remaining in the molten salt is completely recovered with a Zr recovery rate up to 94.72%. This two-step process is feasible for the large-scale extraction of Zr in molten salts to produce Al–Zr master alloys.
研究领域:
冶金工程
·
材料科学
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产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2023
·
IF 8.3
Yulan Yu,Guanghui Feng,Yujun Jia,Hejun Li
In this work, ZrO 2 with different ZrB 2 contents (0, 15, 30,40 wt%) composite powders were synthesized by sol-gel, then they were sprayed on carbon/carbon composites using plasma spraying to construct a three-dimensional (3D) thermal conduction network within the formed coating. Oxyacetylene ablation tests were carried out under 4.2 MW/m 2 to investigate the effect of the 3D thermal conduction network on the ablation resistance of coated samples. The encapsulation structure formed during sol-gel process benefits to slowing the oxidation rate of ZrB 2 and the content of ZrB 2 is critical for establishing a stable 3D thermal conduction network within the coating.
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产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 30
·21799-21807
·
IF 3.9
Yijin Sheng,Fangxu Hu,Yu Wu,De Li,Wenting Ji,Yong Chen
The electrochemical oscillation in Li-ion batteries has been reported for two-phase electrode materials of Li4Ti5O12 and LiCrTiO4, which is originated from the group-by-group phase transition in a multi-particle electrode. For both Li4Ti5O12 and LiCrTiO4, the electrochemical oscillation exhibits usually during charging, while rarely for discharging. Herein, a series of Zr-modified Li4Ti5O12 samples are prepared by using the spray-drying combined with high-temperature sintering method, and the electrochemical oscillation is observed during not only the charging process, but also the discharging process, which gradually grows up and then disappears by increasing the Li content. Compared with Li4Ti5O12, the specific capacity of Zr-modified Li4Ti5O12 decreases gradually by increasing the Zr/Ti ratio, owing to the impurity phases. According to the XRD, XPS and STEM results, the Zr element tends to accumulate on the surface to form ZrO2 nanoparticles, rather than dope into the bulk phase of Li4Ti5O12, which makes Li4Ti5O12 particles well dispersive. In contrast to the Li deficiency for only charging, the electrochemical oscillation during both charging and discharging should be attributed to the Li excess, but too much Li2TiO3 phase will suppress the electrochemical oscillation. Therefore, the Li excess can induce the electrochemical oscillation during both charging and discharging of Zr-modified Li4Ti5O12, which can be adopted to investigate the electrochemical oscillation of other materials in LIBs.
研究领域:
材料科学
·
电化学
·
电池技术
·
纳米技术
✓ 已验证
DOI
高影响因子
Applied Materials Today
·
2025
·
IF 6.9
An Huang,Kai Tan,Xiulan He,Miao Wang,Mingyue Zhou
Porous ZrO 2 /Al 2 O 3 (ZTA) ceramic has shown great potential for fluoride removal from contaminated water owing to its tunable structure, high strength, and excellent chemical stability. The porosity, compressive strength, and fluoride adsorption rate of porous ZTA ceramics prepared by the direct foaming method were systematically studied. A machine learning framework integrating transfer learning, Bayesian optimization, and continuous model refinement was developed to predict and optimize performances of porous ceramics under small-sample conditions. It leverages prior knowledge and limited experimental data to simulate variable-performance relationships. Based on this model, it searches for optimal processing configurations and iteratively improves prediction accuracy. Under the optimal process parameters suggested by the model, the predicted performance (porosity of 91.51 %, compressive strength of 1.58 MPa, and fluoride adsorption rate of 71.71 %) shows strong agreement with experimental results (92.42 %, 1.49 MPa, and 72.49 %), confirming the predictive accuracy achieved through Bayesian optimization. Continuous learning further reduces the mean absolute percentage error of the three performances metrics from 1.02 %∼6.15 % to 0.87 %∼2.74 %, realizing more efficient and reliable material design under data-scarce conditions.
研究领域:
材料科学
·
环境工程
·
化学工程
·
计算材料学
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Zhaoyi Wang,Xiaogang Li,Nanxi Dong,Bingxue Liu,Guofeng Tian,Shengli Qi,Dezhen Wu
Due to the low melting point and non-polarity of polyethylene (PE), the commercially available PE microporous separator intrinsically has poor thermostability above 100 °C and inferior wettability , limiting the development of lithium-ion batteries (LIBs). Herein, a novel PE composite separator coated by high-temperature zirconia@polyimide core–shell nano-microspheres (ZrO 2 @PI nano-microspheres) was designed, producing (ZrO 2 @PI)/PE separator with thermal stability, wettability, and flame retardancy. On account of the ZrO 2 shell nanoencapsulation, the hydrophilicity of PI nano-microspheres has been dramatically improved, which can enhance the electrolyte wettability of the composite separator, and the prepared (ZrO 2 @PI)/PE separator displays enhanced thermal dimensional stability, maintaining its original shape with negligible shrinkage at 150 °C. Furthermore, different from the commercial Al 2 O 3 ceramic-coated separators, the (ZrO 2 @PI)/PE separators possess lower areal density, which is only half as much as the Al 2 O 3 /PE separators. Besides, the half-cell assembled with this (ZrO 2 @PI)/PE separator shows a comparable capacity of 156.9 mAh·g −1 at 5 C to PE separator (118.4 mAh·g −1 ). Meanwhile, the cells assembled with (ZrO 2 @PI)/PE separator demonstrate enhanced cycle performance and thermal safety performance and can work continuously for 109 min at 140 °C, which has enormous improvement compared with the PE-separator-equipped cell (i.e., 21 min). The above results manifest that the (ZrO 2 @PI)/PE separator prepared in this work furnishes LIBs with high safety and electrochemical performance, promising new-generation high energy density and high security LIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 10
·118292
·
IF 6.3
Yakun Wang,Yufei Zu,Guoqing Chen
Al 2 O 3 -ZrO 2 (Y 2 O 3 ) eutectic ceramics are promising high-temperature structural materials with excellent thermal stability and mechanical properties. Crystallographic orientation control is effective for tuning their performance. Herein, we investigated the crystallographic orientation rotation of Al 2 O 3 and ZrO 2 phases in the rod-like and lamellar micro-regions into the core of the colonies of Al 2 O 3 -ZrO 2 (Y 2 O 3 ) eutectic ceramics prepared by the seeding melt-grown method. Results show that ZrO 2 phases exhibit diverse growth directions with gradual rotation in both regions. However, Al 2 O 3 phases exhibit distinct rotational behaviors depending on the morphology: in lamellar regions, the crystallographic orientations of both Al 2 O 3 and ZrO 2 phases rotate synchronously, with the misorientation angle per unit length relative to an initial position reaching up to 2.09°·μm −1 ; in rod-like regions, the Al 2 O 3 phase shows negligible rotational displacement. Crystallographic orientational rotation behaviors were measured in these melt-grown eutectic ceramics, providing a research basis for the solidification of oxide eutectics.
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2026
·
IF 7.6
Ye Wang,Zhengxuan Hu,Guolong Wu,Qiandi Peng,Qunli Zhang,Jianhua Yao,Wen Han,Chen Wen
To improve the wear resistance of titanium alloy, this study proposes a novel approach that combines laser irradiation and ZrO 2 nanoparticle (NP) doping in the fabrication of wear-resistant micro-arc oxidation (MAO) coating on Ti6Al4V (TC4) alloy. The obtained coatings were characterized by using laser scanning microscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) to analyze their surface morphologies, microstructure and chemical compositions. Tribological properties were evaluated via ball-on-disk sliding wear tests, along with the hardness and adhesion of the coating. The results show that the MAO coating prepared under laser irradiation and ZrO 2 nanoparticle doping (NA- L -MAO) exhibits enhancement in density, uniformity and thickness compared with nanoparticle-doped MAO (NA-MAO) or laser-assisted MAO ( L -MAO) alone. Compared with the MAO coating, the NA- L -MAO coating achieves a porosity of only 4.67%, representing a reduction of ∼41.3%. Meanwhile, its volumetric wear rate reaches 3.56 × 10 −5 mm 3 ·N −1 ·m −1 , which is decreased by ∼88.3% and nearly one order of magnitude lower than that of the MAO coating. The ZrO 2 nanoparticles participate in coating growth via melting or embedding behaviours, enabling filling of micropores and increasing coating thickness. Due to laser irradiation, more ZrO 2 nanoparticles enter the NA- L -MAO coating, and more stable phases (rutile-TiO 2 and t-ZrO 2 ) are formed. Simultaneously, laser irradiation promotes uniform coating growth, lower surface roughness and enhanced coating adhesion. The synergistic effect of laser irradiation and nanoparticle incorporation facilitates more particle penetration into the coating, elevates coating hardness and thus improves the anti-wear performance of the coating.
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产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2025
·
IF 5.3
Yaoyi Hu,Xiqiang Yuan,Zhengquan Zhang,Yu Zhang,Han Ma,Yunfei He,Shaoyun Shan,Tianding Hu
Natural borneol has enormous medicinal value (like clearing heat, detoxifying, relieving pain, and other effects) but has a low yield and high price. Compared with the natural extraction method to obtain borneol, a synthetic method has significant advantages such as high yield, environmental protection, and high economic benefits. In the synthesis method, the catalyst is the most key factor. In this study, two catalysts (SO 4 2- /ZrO 2 -TiO 2 and Al 2 (SO 4 ) 3 /ZrO 2 -TiO 2 ) with high catalytic performance and high positive selectivity were synthesized by impregnation method to synthesize borneol from α-pinene. The optimum synthesis conditions of SO 4 2- /ZrO 2 -TiO 2 were as follows: n(Zr): n(Ti) = 3: 1, sulfuric acid concentration 2 mol/L, calcination temperature 550 °C, the yield of borneol was 68.14 %. Based on the preparation of catalyst SO 4 2- /ZrO 2 -TiO 2 , the optimum synthesis conditions of Al 2 (SO 4 ) 3 /ZrO 2 -TiO 2 were as follows: the concentration of aluminum sulfate was 0.4 mol/L, the calcination temperature was 600 °C, and the yield of borneol was 74.58%, Compared with the highest yield of 59.89% reported in the existing literature, the performance is improved by 13.96%. In addition, the mechanism of the esterification and saponification reaction of borneol has been in the blank stage. We used the density functional theory (DFT) to explore the reaction mechanism.
研究领域:
有机化学
·
催化化学
·
药物化学
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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）