ACS Omega
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2020
·
IF 2.87
Jia Wang,Yansong Liu,Xiuyan Guo,Hongqiang Qu,Ran Chang,Jing Ma
Metal–organic frameworks (MOFs) exhibit highly designable properties and have been used in wide applications. To further improve their performance, the modification of MOFs is an effective method. However, the modification process is usually complicated. Besides, the sustainable use of MOFs is difficult to achieve due to the complicated recycling treatment. Herein, we designed a polyethyleneimine (PEI)-modified NH2-MIL-101(Al) composite (PEI@NH2-MIL-101(Al)). This composite showed excellent dye removal performance of methyl orange (MO, 89.4%) and Direct Red 80 (DR80, 99.8%). Remarkably, the dye removal application of PEI@NH2-MIL-101(Al) also acted as a modification process toward flame retardant application. Thus, the dye-adsorbed PEI@NH2-MIL-101(Al) composite (MO-PEI@NH2-MIL-101(Al) and DR80-PEI@NH2-MIL-101(Al)) was sustainably used as an effective flame retardant for an epoxy resin (EP) at low additions (4.0 wt %). The limiting oxygen values of EP/MO-PEI@NH2-MIL-101(Al) and EP/DR80-PEI@NH2-MIL-101(Al) increased to 26.5 and 26.7%, respectively. The heat release and the smoke production of dyes-PEI@NH2-MIL-101(Al)/EP were greatly reduced compared with those of EP. This strategy provides a simple and effective modification method for MOFs. Meanwhile, the modified MOF composite can achieve sustainable application, giving full play to the advantages of MOFs.
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PubMed
高影响因子
TALANTA
·
2020
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IF 5.339
Yanxiao Jiang,Bo Zhang,Jingkang Li,Ying Sun,Xinghua Wang,Pinyi Ma,Daqian Song
A novel vortex-assisted solid-phase extraction method based on MIL-68(Al)/Chitosan-melamine sponge column (or V-MIL-68(Al)/CS-SC-SPE) is presented in this paper. The MIL-68(Al)/Chitosan-sponge column was prepared by a simple infiltration method and a preparation process that does not consume organic solvents. Scanning electron microscopy was used to characterize the functionalized sponge columns, and the skeleton and pores of the melamine sponge were successfully modified with the coating material (MIL-68(Al) and chitosan). Chitosan was used successfully not only as an adsorption adjuvant material, but also as an adhesive in the preparation of MIL-68(Al)/CS coating sponge materials. The presented method was further combined with high performance liquid chromatography (HPLC) and used in the determination of trace parabens (including methyl-, ethyl-, propyl- and butyl-parabens) in environmental water samples. Several important factors that affect the extraction performance were investigated. Under the optimum conditions, the method was successfully used to detect the four kinds of parabens in different water samples (domestic water, lake water and river water). The limits of detection ranged between 0.21 and 0.50 ng/mL, and the relative standard deviations for all parabens were below 10.8%.
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Chunhua Li,Xiaoshuo Zhang,Simin Wen,Rui Xiang,Yong Han,Wenzhi Tang,Tianli Yue,Zhonghong Li
The increasing misgivings of environmental pollution derived from antibiotic residues make it imperative to explore a bifunctional platform for synchronous monitoring and removal of antibiotics. Herein, zeolite imidazolate framework-8 (ZIF-8) is anchored on two-dimensional (2D) amino-functionalized Al-metal organic framework (NH 2 -MIL-53(Al)) nanoplates to construct a dual metal–organic frameworks smart platform (ZIF-8/NH 2 -MIL-53(Al)) for simultaneous capture and fluorescence sensing of tetracyclines (TCs). ZIF-8 nanoparticles anchored on 2D nanoplates having a smaller size and a larger specific surface area boost the adsorption capabilities (561, 533, 526 and 578 mg g −1 for doxycycline (DOX), tetracycline (TET), oxytetracycline (OTC) and chlortetracycline (CTC), respectively). Notably, the pyridine N of ZIF-8 cooperated with the abundant NH 2 on the surface of NH 2 -MIL-53(Al) exhibits high affinity toward TCs, remarkably enhancing the sensitivity by facilitating the photo-induced electron transfer and the inner-filter effect. The LOD s (1.2 μg L −1 for TET, DOX, OTC and 2.2 μg L −1 for CTC, respectively) are at least 10-fold lower than those of NH 2 -MIL-53(Al) and are comparable or superior to those of reported sensors. The dual metal–organic frameworks smart platform presents satisfactory reliabilities and accuracies for detecting TCs in real samples, which anticipates new routes to develop integrated systems for simultaneous capture and detection of organic pollutants.
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PubMed
高影响因子
MATERIALS & DESIGN
·
2022
·
IF 9.417
Yanqing Xue,Qitang Hao,Xinlei Li,Han Zhang,Peiqing Wang,Chengze Yin,Bo Li,Xinliang Wang
The strength-ductility trade-off severely limits the extensive application of particle-reinforced aluminum matrix composites mainly owing to the critical issues of local particle agglomeration and poor interfacial characteristics. The present work concentrates on these intractable puzzles and proposes Mg-Ag microalloying TiB 2 /Al-4.5Cu composites fabricated by an optimized salt-metal reaction method and multistage heat treatment. The resulting microstructure evidence that this new tactic synergistically ameliorates the detrimental agglomeration of TiB 2 particles by Mg and Ag doped at the TiB 2 /α-Al interface， meanwhile promoting the formation of nanosized Ω-Al 2 Cu and σ-Al 5 Cu 6 Mg 2 phases. The mechanical property experimental results indicate that the Mg-Ag microalloyed TiB 2 /Al-4.5Cu composites exhibit an accredited combination of the tensile strength (ultimate tensile strength is 496.3 ± 15.0 MPa) and ductility (uniform elongation is 12.8 ± 1.4 %). We emphasize the reciprocal effect between TiB 2 particles and the precipitated phase associated with unrelaxed misfit strains. Close attention is also paid to the interface binding characteristics and semi-coherent interphase boundary to evaluate their contribution to the ductility. The microalloying strategy can potentially be applied to many other metal matrix composites and boost analogous approaches for designing ultrahigh yet ductile materials for technological applications.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Mingxin Lv,Yanwei Zhang,Qianghua Xin,Defu Yin,Shitao Yu,Shiwei Liu,Lu Li,Congxia Xie,Qiong Wu,Hailong Yu,Yue Liu
In this work, a series of Pd@Al-MSiO 2 yolk–shell-structured nanospheres (YSNSs) with different Al contents were synthesized by a facile one-pot method. The EDX elemental analysis and high-magnification TEM image of Pd@Al-MSiO 2 YSNSs confirmed that its well-defined yolk-shell structure with a moving Pd core and mesoporous silica shell rich in Al species. Furthermore, Solid state NMR and Py-FTIR results confirmed that Al species grafting mainly formed 4-coordinated Al (AlO 4 ) in the mesoporous silica framework which led to generating abundant Lewis acid sites. The influence of Al species on the physicochemical properties of Pd@Al-MSiO 2 YSNSs, as well as their catalytic performance for the hydrogenolysis of glucose to 1,2-propylene glycol (1,2-PG), was investigated. The mesoporous silica shell with abundant Lewis acid sites is a significant contributor to the isomerization of glucose into fructose, while the Pd core plays a role in promoting the hydrogenation of intermediates. The unique hollow space inside the Pd@Al-MSiO 2 YSNSs provides a location for the retro -aldol condensation of fructose and consequently avoids direct hydrogenation of fructose. The as-synthesized Pd@Al 3 -MSiO 2 YSNSs shows superior catalytic activity (1,2-PG selectivity of 47.4%, glucose conversion of 95.4%) in the hydrogenolysis of glucose, and far outperforms the Pd/Al 3 -MSiO 2 catalysts. In addition, owing to the influence of the 4-coordinated Al species on the geometry and chemical properties of the mesoporous silica shell, the nanospheres show good stability and reusability over multiple catalytic cycles without significant loss of activity.
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METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2023
·
IF 3
Han Ziqi,Liu Zhihong,Li Qihou,Wang Kai,Yu Zhiqian,Xia Longgong
Ternary compounds in the Al–Te–O system have been considered as potential materials for Low-Temperature Co-fired Ceramics preparation. Two ternary compounds, Al 2 TeO 6 and Al 2 Te 2 O 7 , have been found in the Al–Te–O system under 920 °C in air. The decomposition behavior of these two compounds has been studied with Thermogravimetric Analysis-Differential Scanning Calorimetry (TGA-DSC) and equilibration experiments. Phase equilibrium of the Al 2 O 3 –TeO 2 system has also been experimentally investigated at ambient atmosphere, and corresponding phase diagram has been derived. Obtained results showed that Al 2 Te 2 O 7 , could only be found when TeO 2 was 66.7-70.0 mol pct and temperature was at 590 °C to 610 °C. Al 2 TeO 6 decomposed into Al 2 O 3 , TeO 2 (g), and O 2 (g) when temperature was above 920 °C. Al 2 Te 2 O 7 converted into Al 2 TeO 6 at 620 ± 2 °C, and then followed the decomposition path of Al 2 TeO 6 . In phase equilibrium study, when the initial sample started from the Al 2 O 3 –Al 2 TeO 6 region, Al 2 TeO 6 and Al 2 O 3 were found in quenched samples at the temperature range of 500 °C to 915 °C. When the initial sample started from the Al 2 TeO 6 –TeO 2 phase region, two solid phases, Al 2 TeO 6 and TeO 2 , could be found in samples prepared under 725 ± 2 °C. When the temperature was above 730 ± 2 °C, there were Al 2 TeO 6 and one oxide liquid phase. In the Al 2 Te 2 O 7 –TeO 2 region, all equilibrated samples had Al 2 Te 2 O 7 and TeO 2 .
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SURFACE & COATINGS TECHNOLOGY
·
2023
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IF 5.4
Duoli Wu,Yi Li,Ziyi Yuan,Liao Xiang,Xinlong Wei,Chao Zhang
The study examined the impact of varying molybdenum content (0 %, 5 %, and 10 % wt) on the high-temperature corrosion resistance of APS-sprayed Ni-clad Al coatings. The coatings were exposed to a simulated biomass-firing environment with pure KCl deposition at 600 °C for 168 h, and a mixed gas containing 15 % water vapor was passed through. The findings revealed that increasing Mo content improved the coating's high-temperature corrosion resistance. The coating with 10 % Mo displayed a continuous layer of Ni and Al oxides on its surface, while KCl was concentrated in the Mo region. Based on the experimental results, a mechanism for how the presence of Mo element contributes to the high-temperature corrosion resistance of NiAl coatings was proposed.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2023
·
IF 6.9
Jinjie Mo,Ziye Ling,Zhengguo Zhang,Xiaoming Fang
In this paper, we investigate a metal composite prepared using a one-step pressing method, where Al–Si alloy acts as the phase change materials (PCMs) and Al 2 O 3 /AlN serve as the structural support materials. The alloy formation and PCM composite preparation are synthesized in a single step. The study aims to characterize the microstructure, thermodynamic, and thermal properties of the composite material. To assess the heat storage properties of the prepared composite PCMs at temperatures higher than 600 °C, a high-temperature test system is established using a high-frequency induction heater. Additionally, we explore how to improve the issue of liquid leakage under high-temperature conditions. The results demonstrate that Al 2 O 3 and AlN (ceramic materials) exhibit excellent chemical compatibility with Al–Si composite PCMs. After sintering, the ceramic materials form a strong bond with Al–Si, effectively retaining the liquid phase of Al–Si alloy within the composite material. Consequently, the Al–Si composite PCMs do not exhibit high-temperature liquid leakage under elevated conditions. Both Al 2 O 3 /Al–Si and AlN/Al–Si composites possess favorable high temperature heat storage properties. The phase change enthalpy of Al 2 O 3 /Al–Si composite reaches 400 kJ/kg, with a thermal conductivity of 36 W/(m·K). Similarly, the AlN/Al–Si composite achieves a phase change enthalpy of 404 kJ/kg and a thermal conductivity of 43 W/(m·K). Both composites fulfill the requirements for high-temperature heat storage applications.
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高影响因子
FUEL
·
2023
·
IF 7.4
Gang Li,Chuande Zhao,Qian Yu,Jie Chen,Fang Yang
Owing to the high energy density, polytetrafluoroethylene/aluminum nanoparticles (PTFE/n-Al) has been considered as the promising composite in energetic applications, but the limited combustion efficiency restricts its practical uses. Undoubtedly, for the further improvement of combustion efficiency, mechanistic understanding of the combustion of PTFE/n-Al is fundamentally necessary. However, the participation effect of non-fluorine species (i.e., carbon) on combustion has been overlooked, leading to the lack of generalized framework for combustion mechanism. By using a combined experimental verification and reactive molecular dynamics (RMD) simulation approach, this work focuses on the participation effect of carbon and involved reaction mechanism in the combustion of PTFE/n-Al. The thermal reactivity and combustion performance of four PTFE/n-Al composites with F/Al molar ratio of 1.0 (R1), 2.0 (R2), 3.0 (R3) and 4.0 (R4) have been investigated by thermal analyses (TGA-DSC-MS) and combustion experiments (flame images, heat of reaction and condensed combustion products). The heat of reaction decreases in the order of R2 (7.89 kJ/g), R1 (7.67 kJ/g), R3 (7.33 kJ/g) and R4 (6.55 kJ/g), and a similar trend has been found for the flame intensity. Moreover, the carbon deposition percentage (%) in combustion of R1, R2, R3 and R4 reaches 76.5%, 76.4%, 90.2% and 123.3%, which shows a negative effect on combustion performance. Based on experimental results, the RMD simulations for the reactions of n-Al and Al core with trafluoroethylene (TFE) and related fluorocarbon atmospheres have been performed. It is found that, going from R1 to R4, the elevated active fluorocarbon species play a double-edged sword role in combustion. On one side, they exhibit a promoting role in accelerating the crack of Al 2 O 3 shell, the dispersion and heat releasing kinetics of Al core. On the other side, they also result in extensive carbon deposition on unreacted n-Al, showing a hindering role in further reaction and lowering combustion efficiency. Accordingly, in experiments, optimal combustion performance of PTFE/n-Al has been observed with suitable composition (R2). Finally, the generalized reaction mechanism involving participation effects of carbon and fluorine has been proposed for PTFE/n-Al, which is beneficial for perfecting combustion mechanism and improving combustion efficiency of fluorocarbon/metal composites.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 29
·13619-13625
·
IF 3.3
Xuequan Jing,Jiaming Liu,Meina Guo,Guoliang Chen,Guoqing Ren,Jiarong Li,Haonan Qin,Zhangwei Yao,Yinhua Wan,Weijie Song,Huifeng Zeng,Feifei Yang,Da Zhao,Kang Hu
It is critical to detect Fe3+ and Al3+ rapidly and accurately due to their high risk to humans and the ecological environment. In this work, a kind of terbium-based metal–organic framework fluorescent probe (Tb-MOF) is facilely fabricated that displays ultra-high selective detection of Fe3+ and Al3+ over various coexisting ions (i.e. Mn2+, Co2+, K+, Ca2+, Na+, Mg2+, Cd2+, Cu2+, Fe2+, Zn2+, Ni2+, Pb2+ and Cr3+). The obtained Tb-MOF exhibits emission at 547 nm and possesses outstanding thermal, fluorescent and chemical stability. The Tb-MOF shows a ratiometric fluorescence signal for Al3+, and the detection limits for Fe3+ and Al3+ are 0.91 and 6.10 μM, respectively. Moreover, the fluorescence intensities and concentrations of Fe3+ and Al3+ have good linear relationships across wide concentration ranges. Furthermore, the quantifications of Fe3+ and Al3+ are achieved in complex tap and river water samples with good recoveries. This study offers a facile and efficient method of developing a fluorescent probe that possesses the ability to quantify Fe3+ and Al3+ in real environmental water samples.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Yuanming Tan,Zhongqiao Sun,Hao Meng,Yide Han,Junbiao Wu,Junli Xu,Yan Xu,Xia Zhang
MOFs/polymer hybrid membranes combine the special surface activity of MOFs and the excellent carries nature of porous polymer and thus exhibit unexpected adsorption/separation performances in the solid-phase extraction. In this paper, a new kind of MOFs/polymer composite membrane , MIL-68(Al)/PVDF have been fabricated for the first time through blending the MIL-68(Al) nanoparticles and polyvinylidene fluoride (PVDF) casting solution and following the lyotropic phase transition. Some means such as SEM, XRD and FT-IR are used to character the structure of these hybrid membranes. The membrane performances including the hydrophilic/hydrophobic properties, membrane porosity and membrane water flux are also measured. The effects of doping amount of MIL-68(Al) on the structure and performances of MIL-68(Al)/PVDF hybrid membranes are discussed. Two persistent organic pollutants : p -nitrophenol (PNP) and methylene blue (MB) are chosen as main adsorption objects to evaluate the adsorption activity of MIL-68(Al)/PVDF hybrid membranes. The influences of various conditions on the adsorption activities are investigated in detail and the optimum adsorption conditions are determined. All the MIL-68(Al)/PVDF hybrid membranes exhibit enhanced adsorption capacity compared to pristine PVDF, and the adsorption activities of hybrid membranes are promoted continually with the increasing doping contents of MIL-68(Al). The adsorption thermodynamics analysis indicates that the adsorption process is mainly characterized by Langmuir monolayer adsorption and chemical adsorption . The coordination bonding formed between NO 2 of PNP and Al(III) of MIL-68(Al), and the acid-base interaction between the sulfur of MB and Al(III) of MIL-68(Al) may be responsible to the highest removal efficiency of PNP and MB. The good dynamics adsorption and regeneration performances indicate the prospect applications of these MOFs/PVDF hybrid membranes in the separation of organic contaminants from industrial waste water.
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高影响因子
COMPOSITE STRUCTURES
·
2018
·
IF 4.101
Aboubakr Medjahed,Mehdi Derradji,Abdeldjalil Zegaoui,Ruizhi Wu,Bingcheng Li
In this study, novel fiber-metal laminates (Al-LiFMLs) were manufactured by the lay-up process using the basalt fibers/phthalonitrile (BFs/PN) composite and the Al-Li alloy. Their mechanical and gamma rays (γ-rays) shielding properties were tested and analyzed then compared to the monolithic alloy. The results indicated that the variation in the number of composite (BFs/PN) plies significantly affected the tensile and shielding properties. The mechanical properties of the Al-LiFMLs showed improvements over the properties of both the individual neat Al-Li alloys and BFs/PN composite materials. For instance, when the number of composite layers varied from 1 to 8, the ultimate tensile strength of the Al-LiFMLs increased from 216 to 483 MPa. It was found that the failure strain displayed a more ductile behavior up to about 20% for all the developed Al-LiFMLs influenced by the ductile fracture mode of the Al-Li alloy. These enhancements were due to the good combination of the composite’s high strength and the metal’s superior ductility as well as the excellent adhesion achieved between the Al-LiFMLs constituents. Moreover, the Al-LiFMLs also revealed an effective gamma rays shielding with screening ratios ranging from 25 to 43% depending on the number of composite plies .
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危险品化学品经营许可证（带存储）