Materials Research Express
·
2021
·Vol. 8
·期 3
·035507
·
IF 1.62
Shi Li,Tao Guo,Miao Yao,Wen Ding,Jialin Chen,Jiaxing Song,Sheng Zhang,Rui Zhu
To study the effect of the addition of potassium perchlorate (KClO4) on the performance of nano thermites, Al/Bi2O3 nano thermites with different mass fraction (wt%) of KClO4 was made by ultrasonic dispersion method. Then, all samples were tested by SEM, DSC and rapid excitation ignition. DSC results showed Al/Bi2O3/10 wt%KClO4 had the highest heat release. Compared with Al/Bi2O3, the heat release increased by 28.32%. The results of activation energy calculations showed Al/Bi2O3/30 wt%KClO4 had the lowest activation energy (Ea). Its activation energy was reduced by 30%, mere about 149.17 KJ mol−1. Finally, it can be seen from the combustion situation that the addition of KClO4 reduced the intensity of burning. This work found a way to increase the heat release or reduce the activation energy of nano thermites by controlling the amount of KClO4 added.
研究领域:
材料科学
·
燃烧学
·
化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Peize Lyu,Wenzhao Sun,Bo Yang,Wanqi Chen,Ruolan Tang,Haile Yan,Zongbin Li,Song Li,Liang Zuo
Magnéli-phase Ti 4 O 7 exhibits broadband photothermal conversion but suffers from rapid oxidation to optically inactive TiO 2 , severely restricting its deployment in high-temperature solar-thermal systems. Here, we demonstrate that Al doping provides an effective dual-function strategy to simultaneously enhance the oxidation resistance and optical stability of Ti 4 O 7 while maintaining its intrinsic photothermal performance. Al-doped Ti 4 O 7 powders (0–10 at. %) were synthesized via hydrogen reduction, and their structural evolution, oxidation kinetics, and spectral responses were systematically evaluated under controlled oxidative environments (300–500 °C, 2–10 h). Al 3+ incorporation induces lattice distortion and electronic localization, which increase oxygen migration barriers and suppress electron-assisted oxidation. During annealing, Al–O–Ti species progressively transform into Al–O–Al–enriched surface layers, forming a robust diffusion barrier that significantly retards the Ti 4 O 7 → TiO 2 conversion. As a result, the 10 at. % Al-doped sample retains a high solar absorptance of 95.8% after 400 °C/10 h oxidation, outperforming undoped Ti 4 O 7 (92.2%). Moreover, controlled oxidation produces Ti 4 O 7 @TiO 2 core–shell structures with statistically enhanced near-infrared absorption arising from multiple interfacial reflections and scattering–induced phase accumulation. Kinetic analysis confirms reduced oxidation rates and increased activation barriers across the full temperature window. These results establish Al-doped Ti 4 O 7 as a durable, thermally stable photothermal material suitable for solar selective absorbing coatings, concentrated solar power receivers, and other high-temperature chemical engineering processes requiring long-term optical and structural robustness.
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产品关联
DOI
高影响因子
Journal of Manufacturing Processes
·
2020
·
IF 4.086
Xiaoping Cai,Keer Li,Changcheng Sang,Xuanru Ren,Leihua Xu,Peizhong Feng
The dissimilar metals joining of Ti/Cu was conducted using a rapid thermal explosion (TE) reaction. The Ni-Al powder mixture was used as TE reaction system, and the effect of temperature (600, 700, 800 and 900 °C) on interfacial diffusions, microstructure and mechanical properties of Ti/Cu joint were investigated. The maximum combustion temperature of Ni-Al interlayer during heating process was 720 °C and a significant exothermic phenomenon was observed for 5 s. The infiltration of melted Al into the Ti/Cu substrate and formed a continuous transition region at the interface of the joints were the dominant joining mechanisms. Microhardness of the interlayer after heated at 900 °C for 30 min possessed prominent improvement from 32.6 to 101.7 HV due to the completely phase transformation of Ni-Al interlayer, which composed of main phase NiAl and minor phase Ni 3 Al. The bond strength of the joint was checked to assess the joint quality. For the joint processed by 900 °C for 30 min, the maximum shear strength of Ti/NiAl and Cu/NiAl were 33.4 MPa and 39 MPa, respectively.
研究领域:
材料科学
·
连接技术
·
金属间化合物
·
微观结构分析
·
力学性能
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Chuandong Wu,Pan Fang,Guoqiang Luo,Fei Chen,Qiang Shen,Lianmeng Zhang,Enrique J. Lavernia
We report on a study on the influence of Plasma activated sintering (PAS) parameters on the microstructure and mechanical properties of aluminum matrix composites (AMCs). In this paper a commercial Al alloy (7075) reinforced with 7.5 wt.% B 4 C were synthesized using PAS. Specifically, we studied the influence of temperature, in the range of 450 °C to 540 °C, and holding time on the densification behavior of Al-7075/B 4 C composites. Moreover, the influence of residual porosity on mechanical properties of Al-7075/B 4 C composites was established via measurements of Vickers hardness, bending and compressive strength. High mechanical properties including Vickers hardness 181.6 HV, bending strength 1100.3 MPa, high compression yield strength 878.0 MPa and fracture strength 469.3 MPa of the consolidated Al-7075/B 4 C composite sintered at 530 °C for 3 min were achieved and attributed to a fully dense microstructure and a strong interface between matrix and reinforcement.
研究领域:
材料科学
·
金属基复合材料
·
粉末冶金
·
固态加工
·
力学性能表征
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Sikang Wei,Yang Xu,Shihong Tian,Zhaohui Han,Lei Xu
In this study, Al-Mg-Sn-Ga anode material prepared by heating up to 800 °C in microwave field under different powers and heating up to 800 °C in conventional field is compared. The microstructure and corrosion morphology of aluminum alloy anode are observed by electron backscatter diffraction(EBSD) and scanning electron microscopy(SEM), and Tafel polarization curve , electrochemical impedance spectroscopy (EIS) and constant current are characterized by different melting modes. The results are showed that microwave can change the grain orientation of aluminum alloy anode and corrosion forms, compared to the conventional technology, the microstructure of the alloy electrode material can grow preferentially at (001), improve alloy anode electrochemical properties , by pitting corrosion forms into a uniform corrosion , improves the corrosion resistance of the anode and the anode utilization. At the same time, aluminum alloy anode has excellent discharge performance under microwave 2000 W treatment. The energy density and capacity density are 2729.3 Wh·kg −1 and 2596.6 mAh·g −1 , respectively, which are 44.03% and 42.26% higher than those of conventional muffle furnace melting. Therefore, microwave technology can improve the electrochemical performance by affecting the microstructure of alloy materials.
研究领域:
材料科学
·
电化学
·
金属腐蚀与防护
·
能源材料
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功能材料
·
冶金工程
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 11
·16795-16804
·
IF 0
Li Haiyu,Xu Mingze,Zhang Tingsong
The issue of water pollution has emerged as a formidable challenge, prompting a pressing need for solutions. The utilization of metal nanoparticles with surface plasmon resonance and semiconductor composite photocatalysts is regarded as a highly effective approach to solve this problem. g-C 3 N 4 is an effective catalyst for the degradation of organic pollutants. Its photocatalytic performance is usually enhanced by the use of the noble metal Au Ag. However, the high cost of these materials limits their application. In this study, we present the synthesis of Al NPs/g-C 3 N 4 nanocomposites using the bridging effect of ligands. The characterized of transmission electron microscopy (TEM), X-ray diffractometer (XRD) and ultraviolet-visible spectroscopy (UV-Vis) proved that Al NPs/g-C 3 N 4 with a wider light absorption range were successfully synthesized. The effects of ligands, (glutathione (GSH), glutamic acid (GAG), and cysteine (CYS)), Al diameter (40 to 200 nm) and the ratio of Al to g-C 3 N 4 (1:1 to 5:1) on the photocatalytic degradation of methylene blue (MB) by Al NPs/g-C 3 N 4 were also evaluated. The results showed that the optimum degradation efficiency of Al NPs/g-C 3 N 4 for MB at 5 mg/L reached 100% within 60 min, which was 11 times higher than that of pure g-C 3 N 4 . The principal analysis of Al enhancing the photocatalytic performance of g-C 3 N 4 was studied through transient photocurrent spectroscopy (TPC), electrochemical impedance spectroscopy (EIS), and steady-state transient fluorescence spectroscopy (PL). The results confirmed that hot carriers generated by localized surface plasmon resonance (LSPR) of Al nanoparticles increase the carrier concentration. In addition, the Schottky barrier generated by Al and g-C 3 N 4 could also improve the carrier separation rate and increase the carrier lifetime. This work is expected to solve the problem of organic wastewater treatment and lay the foundation for subsequent research on photocatalysis. Graphical abstract
研究领域:
环境科学
·
材料科学
·
纳米技术
·
光催化
·
水处理
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DOI
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2023
·
IF 7.8
Shuyang Shi,Baozhong Ma,Ding Zhao,Xiang Li,Shuang Shao,Chengyan Wang,Yongqiang Chen
The new process ‘coal gangue/fly ash – HNO 3 pressure leaching (NAPL) –low-temperature pyrolysis’ was proposed by our team, which aimed to achieve the transformation of coal-based solid wastes from harmless to Al resource. For cost control, the regeneration of HNO 3 at a low cost was crucial for the process. Following NAPL of coal gangue and fly ash, massive amounts of Al(NO 3 ) 3 ·9 H 2 O were collected, with a decomposition temperature as low as 523 K. The energy consumption for low-temperature pyrolysis could be supplied by the combustion of residual carbon (6.96 wt%) during the thermal activity of coal gangue, allowing HNO 3 to be regenerated and recycled without extra heat supply . However, little research has been done on the pyrolysis behavior and kinetics of Al(NO 3 ) 3 ·9 H 2 O, which was examined in this study. The pyrolysis characteristics of Al(NO 3 ) 3 ·9 H 2 O were assessed by TG-DSC analysis. Further experiments and XRD/FTIR/MS analysis revealed that phase evolution of Al(NO 3 ) 3 ·9 H 2 O followed the sequence of Al(NO 3 ) 3 ·9 H 2 O→ Al(NO 3 ) 3 ·nH 2 O→ Al(NO 3 ) 3 ·3Al(OH) 3 ·5/2 H 2 O→ AlOOH→ Al 2 O 3 . Subsequently, the thermodynamic (∆ G , ∆ H , ∆ S ) and kinetic ( E a , A ) parameters were calculated based on the thermogravimetric data by the iso-conversional methods. And the mechanism models and functions were identified via the Malek method. Finally, the economic evaluation of pyrolysis indicated that 5.04 × 10 –3 Nm 3 of natural gas was consumed during pyrolysis of one mole Al(NO 3 ) 3 ·9 H 2 O, equivalent to 44.33 $ per ton of Al 2 O 3 . As a basic research of Al(NO 3 ) 3 ·9 H 2 O pyrolysis, this paper enhances related theories of the NAPL process.
研究领域:
材料科学
·
热工工程
·
无机化学
·
废弃物资源化
·
过程工程
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DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Qian Luo,Runyu Wang,Kai Lu,Hang Liu,Guocai Yuan,Juncheng Ding,Xiaobo Lei,Ruonan Min,Qinyong Zhang,Lihong Huang
PbSe has attracted significant attention as a medium-temperature thermoelectric (TE) material due to its abundance and low cost. This study demonstrate that in the novel thermoelectric system of Al x Pb 0.9975 Sb 0.0025 Se samples ( x = 0, 0.005, 0.01, 0.02, and 0.03), the electronic conductivity of pure PbSe was enhanced by Sb doping. Introducing a small amount of Al to occupy the Pb vacancies not only increases the Hall carrier concentration in PbSe, but also resulting in an increase in Seebeck coefficient ( S ). At 873 K, the power factor ( PF ) of the sample with x = 0.02 increases to 16 μW cm −1 K −2 . In addition, the total thermal conductivity did not increase significantly, so the thermoelectric performance was effectively improved, a maximum figure of merit ( ZT ) of 1.8 is achieved at 873 K, along with a high average ZT ( ZT avg ) of approximately 1 over the temperature range of 300–873 K.
研究领域:
材料科学
·
热电学
·
能量转换
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DOI
高影响因子
Arabian Journal of Chemistry
·
2015
·
IF 3.725
Shifeng Li,Yanming Shen,Min Xiao,Dongbin Liu,Lihui Fan
Controlled release formulations have been proven to have potential in overcoming the drawbacks of conventional plant growth regulators. Novel controlled-release formulation of β -naphthoxyacetic acid (BNOA) intercalated MgAl-layered double hydroxides (LDHs) was prepared by co-precipitation method. The effects of temperature, pH value, and release medium on BNOA release were studied and the releasing mechanisms were discussed. The results of release show that the increase of temperature induces the increase of BNOA release extent. The release rate and accumulated release amount of BNOA are found to be dependent to the anion in the aqueous solution in the order of CO 3 2− > SO 4 2− > Cl − . Moreover, the pH is the key controlling factor for the BNOA release processes, and with strong acid medium, the release character of BNOA is different from those at pH 7 and 12, which accompanies with fast collapse of LDHs nanolayered structure. The nanohybrid of BNOA intercalated LDHs possessed good controlled release properties and the BNOA release character from the nanohybrid fitted pseudo-second-order model in neutral medium.
研究领域:
材料科学
·
农业科学
·
植物生理学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121220
·
IF 7.2
Mengjiao Yu,Xiong-Fei Zhang,Mengjie Li,Jianan Song,Jianfeng Yao
The valorization of cellulose into valuable platform chemicals necessitates efficient and sustainable catalytic systems, where the acid-base properties of catalysts are critical for directing reaction pathways. This work presents the one-pot synthesis of a series of aluminum-based metal-organic frameworks (MIL-53) with tunable acid-base functionalities, achieved by modulating organic linkers. The successful formation of cooperative acid-base sites was confirmed by comprehensive characterization, including X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and pyridine adsorbed infrared spectra. Catalytic performance evaluations demonstrated that acid-base cooperative sites significantly enhance the oriented conversion of cellulose to 5-hydroxymethylfurfural (5-HMF). Under optimal conditions (190 °C, 8 h) in a tetrahydrofuran (THF)/NaCl-H 2 O biphasic system, MIL-53-NH 2 /SO 3 H yielded 63.8 % 5-HMF, 6.3 % levulinic acid (LA), and 23.9 % formic acid (FA). The catalytic transformation of cellulose is a cascade process encompassing hydrolysis of cellulose to glucose, isomerization of glucose to fructose, dehydration to 5-HMF, and rehydration of 5-HMF to LA and FA. These results provide a promising strategy for designing efficient acid-base bifunctional catalysts for biomass conversion.
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.6
Tingting Lei,Yating Xu,Siyi Tan,Jiafu Xiao,Shaojing Zhao,Minhuan Lan
The widespread use of chlortetracycline (CTC) in agriculture and aquaculture has raised significant concerns regarding environmental contamination and human health risks. There is a critical demand for developing rapid, sensitive, and selective detection techniques for CTC identification. In this study, we introduced a smartphone-integrated ratiometric fluorescent sensor utilizing Al-doped carbon dots (Al-CDs), which were synthesized through a straightforward one-pot hydrothermal method. CTC quenches Al-CDs' fluorescence at 400 nm via the inner filter effect. Concurrently, a distinct fluorescence signal at 500 nm emerged, resulting from the enhanced intrinsic fluorescence of CTC upon its chelation with Al 3+ on the surface of Al-CDs. This ratiometric fluorescence spectral response enables a visible color shift from blue to green upon UV irradiation. The constructed sensor achieves a remarkable detection limit of 0.17 μM and displays exceptional specificity toward CTC among other antibiotics, metal ions and amino acids. Successful application in real water samples yielded satisfactory recovery rates (98.5–110.6%), highlighting the potential of this smartphone-integrated platform for on-site and quantitative CTC detection.
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产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemistry
·
2026
·Vol. 2026
·期 1
·1709523
·
IF 4.2
Zarin Tasnim Promy,Zhiqian Wei,Lixin Song,Pingfan Du,Jie Xiong
Electrodes with high surface area, rapid charge transport, and mechanical robustness are essential for high-performance supercapacitors. In this study, a flexible Ni/Ni–Al layered double hydroxide/activated carbon cloth (Ni/Ni–Al–LDH/ACC) electrode was fabricated through a two-step process comprising potentiostatic Ni electrodeposition followed by hydrothermal growth of Ni–Al–LDH on ACC. The hybrid architecture enhanced ion diffusion and electron transport, leading to significantly improved electrochemical performance. The Ni/Ni–Al–LDH/ACC electrode delivered a high specific capacitance of 867.50 F/g@0.40 F/cm 2 at 7.00 mA/cm 2 , with an energy density of 27.00 Wh/kg and a power density of 3.33 × 10 3 W/kg, retaining 91.20% of its capacity during cycling. An aqueous asymmetric supercapacitor assembled using Ni/Ni–Al–LDH/ACC//ACC exhibited a specific capacitance of 7.68 F/g@0.74 F/cm 2 , together with an energy and power density of 1.91 Wh/kg@726.70 W/kg and a cycling stability of 86.50%. These results demonstrate the material’s strong potential as a low-cost, flexible, and high-efficiency electrode for next-generation energy-storage devices.
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DOI
高影响因子
危险品化学品经营许可证（带存储）