Journal of Energy Storage
·
2025
·
IF 9.8
Xiaohan Zhao,Qi Liu,Wenxiu He,Daobin Mu,Li Li,Renjie Chen,Feng Wu
Low-cost sodium-ion batteries have significant potential in large-scale energy storage applications owing to the abundant sodium reserves. Despite O3-type layered transition metal oxide cathode materials show the high energy density and initial coulombic efficiency, their structural instability and severe interface side reactions lead to a decline in cycling performance, posing notable challenges and obstacles to their large-scale commercialization. In this study, we propose a simple, direct, and practical strategy to coat the O3-NaNi 1/3 Fe 1/3 Mn 1/3 O 2 cathode material surface with a protective Al 2 O 3 layer using Al(OH) 3 as the aluminum source. This method effectively suppresses the deleterious degradation of the bulk phases and surface during cycling, thereby improving the electrochemical performance of the material. It is proved that harmful decomposition of the electrolyte on the material's surface is reduced, and the interface stability is enhanced by characterization techniques such as XRD , SEM-EDS, TEM, and XPS . Stress and strain induced by sodium ion insertion and extraction, which cause particle fracture , are effectively alleviated by the rigid coating, improving the structural degradation in the near-surface region. The material with 0.5 wt% coating exhibits a capacity retention of 60.7 % (18.4 % higher than the uncoated sample) after 200 cycles at 1C rate and shows a lower interfacial transfer impedance. It is guided for optimizing the cycling stability of layered oxide cathode materials to the development of sodium ion battery technologies.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhao Feng,Xiaolan Zhou,Pan Min,Hailong Li,Hong Liu,Yuntao Cheng
The intricate preparation process and prohibitively high manufacturing costs have long constrained the research and application of transparent ceramics. This study presents a straightforward, low-cost pressureless direct solid-state reaction sintering method, through which highly transparent AlON ceramics with optical properties comparable to those produced by conventional two-step methods were successfully fabricated. In this study, we found that AlN played a critical role in the sintering behavior of the Al 2 O 3 -AlN solid solution. The evolution of density and phase composition in the Al 2 O 3 -AlN solid solution with temperature revealed that the density reaches its maximum at ∼1250 °C, followed by a gradual decrease and eventual stabilization, which is due to volume expansion caused by the progressive formation of the AlON phase at ∼1650 °C. Before the complete phase transformation, the density of the solid solution decreased with increasing AlN content. Pure AlON phases were achieved when the Al 2 O 3 :AlN molar ratios were 9:3, 9:4, and 9:5, with similar densities. Microstructural examination and particle size distribution analysis revealed that variations in AlN content also affected the average grain size of the solid solution, demonstrating a non-monotonic trend characterized by an initial decrease (from ∼197.6 to ∼8.5 μm), a subsequent increase (to ∼135.8 μm), and a final decrease (to ∼7.3 μm). In contrast, hardness measurements demonstrated that the Vickers hardness decreased linearly with the increase of AlN content, from ∼19.5 to ∼13.2 GPa. Transmittance assessment indicated that the AlN content exerted a significant influence on the sintering temperature requisite for fabricating AlON transparent ceramics, with an increase in AlN content necessitating a correspondingly higher processing temperature. Finally, AlON ceramics with high optical transmittance of ∼82.3 % at 850 nm were achieved at temperatures of 1880 °C and 1900 °C for compositions with Al 2 O 3 to AlN ratios of 9:4 and 9:5, respectively.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jing Chang,Xukun Yang,Yifan Li,Shuai Chen,Qinyin Xu,Yixin Zhang,Liwen Yan
Mullite fiber felt with outstanding thermal stability and excellent thermal insulation performance was widely used as a thermal protection material in the aerospace field. However, the poor mechanical property severely restricted the application of mullite fiber felt. Herein, the mullite fiber felt reinforced Al 2 O 3 -SiO 2 (MF/Al 2 O 3 -SiO 2 ) porous composites with lamellar matrix were fabricated by the sol impregnation combined with the freeze-drying method. Compared to the ambient-dried MF/Al 2 O 3 -SiO 2 composites, freeze-dried MF/Al 2 O 3 -SiO 2 composites with lamellar matrix possessed a lower density (0.32–0.86 g/cm 3 ), higher porosity (73.30–90.03 %) and lower thermal conductivity (0.12–0.22 W m −1 K −1 ). What’s more, due to the dense lamellar Al 2 O 3 -SiO 2 ceramic matrix, the compressive strength of freeze-dried MF/Al 2 O 3 -SiO 2 composites was nearly 4 times higher than that of ambient-dried MF/Al 2 O 3 -SiO 2 composites and up to 4.25 MPa. In addition, the thermal and mechanical properties of MF/Al 2 O 3 -SiO 2 composites were maintained well at 1400 °C. The improved thermal insulation and mechanical properties of MF/Al 2 O 3 -SiO 2 porous composites with lamellar matrix indicated that MF/Al 2 O 3 -SiO 2 porous composites could be a promising candidate as the high-temperature thermal protection material in the aerospace field.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Tianyi Huang,Chenxian Zhao,Danyang Zhao,Yujun Wang,Guangsheng Luo
The exposure of crystal planes is a crucial determinant of support activity and effective metal anchoring in catalysis. Herein, we develop an efficient process for designing the crystal planes of alumina microspheres. The mechanism involves hydrogen bond adsorption between octanol and boehmite, alongside the hindrance effect of hydrophobic carbon chains on hydration layer, to achieve effective exposure of the γ-Al 2 O 3 (100) crystal plane. HRTEM and 27 Al NMR analyses confirm that the proportion of exposed γ-Al 2 O 3 (100) plane increases to 59% following octanol directional adsorption. Moreover, microfluidic field measurements demonstrate that the microchannel enhances mass transfer to facilitate octanol directional transmission and hydrogen bond adsorption within the sol droplet. This approach ultimately enables integrated reshaping of alumina microspheres with a 2.7-fold increase in the γ-Al 2 O 3 (100) plane exposure. This study provides an effective operational paradigm for achieving support crystal plane exposure in industrial applications.
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International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 7
·7129-7140
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IF 1.5
Weigang Wu,Caiyan Liu,Fang Huang,Huaying Li,Yuting Wang,Ding Hong,Shi Wang,Xiaobin Zeng
In this work, a simple and novel method for determination of brain serotonin (5-HT) in depression mice was proposed with modified screen-printed electrode based on MWNTs/Al 2 O 3 /chitosan. The modified SPE displayed excellent electrocatalytic activity towards the oxidation of 5-HT in real brain tissue samples. Square wave voltammetry (SWV) was employed to optimize the experimental conditions. The proposed sensor showed voltammetric responses with high and good sensitivity for 5-HT in optimal conditions. The peak current of 5-HT was proportional to the concentration in the range of 0.01 μM to 1.0 μM with the detection limit 0.005 μM. Compared with the HPLC method, the newly developed method also presented good results in the detection of brain 5-HT level, which made it possible for helping depression desiease diagnosis. In conlusion, our experimental results strongly suggested that the established SPE could be used to the fast depression determination of 5-HT, which might offer a potential minotor tool for in future.
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MATERIALS LETTERS
·
2014
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IF 2.269
Jinna Zhang,Dandan Hao,Hui Lu,Wenguang Leng,Jianzhou Gui,Yanan Gao
A surface modification strategy was applied by using 3-aminopropyltriethoxysilane (APTES) covalent linkage between the Schiff-base networks (SNW) polymer layers and porous α-Al 2 O 3 ceramic support. The SNW-1 polymer membrane and powders resulting from the polycondensation reaction between melamine and terephthalaldehyde without the polycondensation catalysts were investigated by SEM and FT-IR. The results show that the discrete and few covered polymer layers were formed on the unmodified porous α-Al 2 O 3 support. In contrast, the uniform and compact SNW-1 polymer membrane was fabricated successfully on the APTES modified α-Al 2 O 3 support by in-situ catalyst-free polycondensation method, indicating that the APTES surface modification facilitates the growth of the novel SNW-1 polymer membrane on the porous α-Al 2 O 3 support.
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CORROSION SCIENCE
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2018
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IF 4.862
Jun-Yi Sha,Hong-Hua Ge,Chuan Wan,Le-Tian Wang,Si-Yu Xie,Xin-Jing Meng,Yu-Zeng Zhao
Corrosion inhibition behaviour of sodium dodecyl benzene sulphonate (SDBS) towards brass in simulated cooling water (SCW-SDBS) and Al 2 O 3 nanofluid (SCW-SDBS-Al 2 O 3 ) was investigated by electrochemical methods and surface analysis techniques. SDBS adsorbed on the brass surface and exhibited some corrosion inhibition in both media. The brass surface was covered mainly by Zn 5 (OH) 6 (CO 3 ) 2 and Cu 2 O in SCW, Cu 2 O and SDBS aggregates in SCW-SDBS, and a relatively uniform SDBS film in SCW-SDBS-Al 2 O 3 nanofluid. Al 2 O 3 nanoparticles and SDBS exhibited a synergistic effect of inhibiting brass corrosion due to their electrostatic adsorption and the obvious increase of critical micelle concentration of SDBS by the nanoparticles.
研究领域:
腐蚀科学
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材料化学
·
纳米流体
·
电化学
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Jing Wang,Weida Shi,Minghui Qiu,Juanjuan Wen,Xianfu Chen,Yiqun Fan
Ceramic tight ultrafiltration (UF) membranes exhibit excellent chemical and thermal stability. However, increased pore size and limited separation accuracy caused by high temperature sintering remain challenges in their preparation and application. In this study, a facile lattice-doping strategy using Fe-doped sol–gel precursors was developed to fabricate α-Al2O3 tight UF membranes. Fe incorporation effectively promoted the γ → α phase transformation at a reduced temperature (950 °C), suppressed grain growth, and produced smaller and more uniformly distributed pores with an average size of 5.5 nm. Increasing Fe content further enhanced surface hydrophilicity, corrosion resistance in biotic systems, and pure-water permeability (130 L·m–2·h–1·bar–1). Nevertheless, excessive Fe loading (>10%) resulted in phase separation and pore size heterogeneity. The optimized 10% Fe-doped α-Al2O3 membrane exhibited outstanding separation performance, achieving a BSA rejection of 99.9% and a permeance of 80 L·m–2·h–1·bar–1, nearly double the value of the undoped membrane. It also showed a significantly improved normalized flux and a flux recovery ratio exceeding 80%, demonstrating excellent antifouling capability. Similar antifouling and high removal were also observed in humic acid separation. These compelling features highlight its potential for efficient water purification applications.
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PubMed
高影响因子
High Voltage
·
2022
·Vol. 8
·期 2
·274-282
·
IF 4.967
Song Xiao,Junyi Chen,Peng Wu,Qiang Yao,Long Li,Xuanpei Pang,Shiling Zhang,Xiaoxing Zhang,Yi Li
C 4 F 7 N is considered to be the most potential alternative gas for SF 6 . However, harmful decomposition by-products generated by the discharge or overheating faults will pose threat to safe operation and service life of gas insulated equipment (GIE). Herein, we investigated the adsorption performance of γ -Al 2 O 3 on C 4 F 7 N and its decomposition products to evaluate the possibility of using it as by-products adsorbent or exhaust treatment material. It is found that γ -Al 2 O 3 demonstrates superior adsorption capacity for CF 4 , C 2 F 6 , C 3 F 8 , C 3 F 6 , C 2 F 4 , and keeps stable after the interaction. The first-principles calculation infers that γ -Al 2 O 3 has stronger interaction with C 4 F 7 N, C 3 F 6 and C 3 F 8 than that of C 2 F 4 , C 2 F 6 and CF 4 . There exists obvious charge transfer between C 4 F 7 N and γ -Al 2 O 3 , which belongs to chemisorption. The interaction between F 2p orbital and C=C π orbital determines the gas-solid adsorption performance. The desorption properties were also explored and the recovery time was in order of CF 4 < C 2 F 6 < C 2 F 4 < C 3 F 8 < C 4 F 7 N < C 3 F 6 . Overall, the γ -Al 2 O 3 is inappropriate to be used as the adsorbent for decomposition by-products of C 4 F 7 N gas mixture-based GIE, while it can be used as exhaust treatment material for C 4 F 7 N wasted gas.
研究领域:
电气工程
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环境科学
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材料科学
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物理化学
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Junhui Liu,Anfeng Zhang,Xiao Jiang,Min Liu,Jie Zhu,Chunshan Song,Xinwen Guo
Conversion of CO2 by hydrogenation into higher hydrocarbons has attracted much attention due to the continuous increasing concentration of CO2 in the atmosphere. Fe5C2 was used as the active site and mixed with K-modified supports for CO2 hydrogenation to synthesize value-added hydrocarbons. A series of supports were tested, and the alkaline Al2O3 was the best choice for light olefins and C5+ hydrocarbons. The transformation of product selectivity at time on stream demonstrated that potassium migrated into Fe5C2 during reaction. The selectivity of C2+ is 69.2% containing 35.8% C2–C4= and 29.1% C5+ value-added hydrocarbons with the 31.5% CO2 conversion (H2/CO2 = 3). When the ratio of H2 and CO2 was switched to 4, CO2 conversion improved to 40.9%, and the C2+ selectivity to 73.5%, containing 37.3% C2–C4= and 31.1% C5+ value-added hydrocarbons. The mixture catalysts can be directly used without any reduction before reaction, reducing the consumption H2 and simplifying the operation.
研究领域:
催化化学
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能源化学
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环境科学
·
材料化学
·
工业催化
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Bing Liu,Hong Yang,Jinbin Xu,Minxue Deng,Yongbo Xiong,Sihui Wu,Zhanwang Li,Yuncong Xu,Mingyue Wang,Wenfeng Han
Stabilizing metastable active centers under harsh reaction conditions represents a significant challenge in heterogeneous catalysis. The F-Al-O species exhibits excellent catalytic activity for the gas-phase dehydrofluorination of potent greenhouse gas hydrofluorocarbons (HFCs) to produce hydrofluoroolefins (HFOs). However, this species is prone to transform into the F-Al-F configuration via excessive fluorination, subsequently leading to catalyst deactivation because of coke deposition. To address this issue, we present a viable strategy for stabilizing the metastable active centers. Al 2 O 3 doped with boron (B), phosphorus (P), and sulfur (S) was synthesized via the sol-gel method. Results demonstrate that in the dehydrofluorination of HFC-245fa, the phosphorus-doped Al 2 O 3 catalyst (P-Al 2 O 3 ) outperforms its boron- and sulfur-doped counterparts, achieving a conversion of 87% compared to 68% and 49%, respectively. The incorporation of P significantly alters the coordination environment of Al 3 + within the Al 2 O 3 lattice, forming O-Al-O-P bonding configurations. During the subsequent dehydrofluorination reaction, these structures undergo fluorination to yield HF-resistant F-Al-O-P species. This process effectively impedes the deep fluorination of Al 2 O 3 into AlF 3 , thereby stabilizing the metastable F-Al-O active centers. Furthermore, this anti-fluorination mechanism significantly suppresses catalyst coking and prevents pore structure collapse. In the dehydrofluorination of HFC-245fa to HFO-1234ze, the P-Al 2 O 3 catalyst achieved a high conversion of 87%, representing an approximately threefold enhancement over conventional Al 2 O 3 , and no significant deactivation trend was observed after 500 h of reaction. This work provides a fundamental understanding of stabilizing metastable active centers and paves a practical pathway for designing robust catalysts for reactions under corrosive atmospheres.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yuting Lin,Yuran Li,Shining Wang,Jianshan Wang,Yanbin Cui,Tingyu Zhu
Blast furnace gas as a vital secondary energy in iron and steel industry, necessitates efficient removal of carbonyl sulfide (COS) to realize clean high-value utilization. However, conventional Al 2 O 3 catalysts suffer from low hydrolytic activity and poor sulfur resistance, limiting their industrial application. This work systematically elucidates the mechanisms of K coordination and hierarchical pore on COS hydrolysis. EXAFS and DFT reveal that appropriate K doping induces highly dispersed K species with four-coordinated K species featuring K-O-Al bonds, which increase the electron cloud density of O atom in surface hydroxyl groups (-OH) and significantly enhance the COS conversion by over 50%. For hierarchical pore catalysts, the introduction of expanding agent breaks the dense stacking of alumina particles, exposes more Al atoms and increases [AlO 6 ] coordination content, which synergistically enriches active -OH sites. More importantly, the interconnected hierarchical porous channels accelerate gaseous H 2 S desorption and effectively mitigate surface sulfur deposition, enabling the catalysts to maintain over 90% COS conversion for 8 h. This work provides atomic-level insights into K coordination and hierarchical pore, offering a rational strategy for designing high-efficiency and sulfur-resistant COS hydrolysis catalysts for blast furnace gas purification.
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