NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 29
·13619-13625
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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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PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Song Xiao,Xiangkang Cao,Zehua Dong,Xiaoze Ma,Xinxin Zhang,Guangyi Cai
Ce-based imidazole complex (Ce-IM/ZIF-8) nanoparticles (NPs) were fabricated by doping cerium ions (Ce 3+ /Ce 4+ ) in zeolite imidazolate framework-8 (ZIF-8) through a one-pot co-precipitation method. The stimuli-responsive release of Ce 3+ /Ce 4+ species from the Ce-IM/ZIF-8 NPs under acidic conditions was confirmed by UV–Vis spectroscopy. Electrochemical impedance spectroscopy and scanning electron microscope were applied to evaluate the corrosion inhibition efficiency of Ce-IM/ZIF-8 NPs on bare aluminum alloy , and it demonstrates that the released Ce 3+ /Ce 4+ , Zn 2+ ions and imidazole could absorb on the surface of Al alloy by chelating effect, forming a compact corrosion barrier on the Al substrate. Furthermore, the Ce-IM/ZIF-8 NPs were encapsulated into epoxy (EP) resin to obtain a composite coating , and it is found that when the NPs addition amount was 1 wt%, the EP-based composite coating exhibits excellent corrosion barrier and promising self-healing ability, with its impedance at 0.01 Hz maintaining 2.2 × 10 8 Ω·cm 2 even after 6 cycles of aging tests (720 h), which could be ascribed to the synergistic inhibition of released Ce ions and imidazole molecules on Al substrate beneath the defective coating.
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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
·
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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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Heng Mao,Shen-Hui Li,Ao-Shuai Zhang,Li-Hao Xu,Heng-Xing Lu,Jing Lv,Zhi-Ping Zhao
Furfural is a typical biomass-derived platform chemical. Conventional processes for furfural production are uneconomical and energy-intensive because only about 3–6 wt% of furfural in the hydrolysate needs to be separated. In this study, a series of mixed matrix membranes (MMMs) were prepared by incorporating MIL-53(Al) particles (MAPs) into poly (ether-block-amide) (PEBA 2533) matrix for pervaporation separation of furfural from aqueous solutions. The MAPs with anisotropic morphology and tunable particle size were precisely synthesized by a high-efficiency solvent-controlled microwave synthetic strategy. Effects of MAPs on the microstructures, physicochemical properties of MAPs/PEBA MMMs were investigated in detail through SEM, EDS, XRD, FTIR, TGA, N 2 adsorption and contact angle measurements. The experimental results suggested that compared with the PEBA control membrane, the addition of MAPs notably reduced the permeation energy barrier for furfural, but not for water. The coin-like MAPs-16.7 filled MMMs presented the optimal separation performance, which exceeded other furfural-permselective membranes. Impressively, a high total flux of 3800 g∙m −2 ∙h −1 and an adequate furfural/water separation factor of 50.2 was achieved in PV separation of 1 wt% furfural aqueous solution at 80 °C, which could substantially reduce capital investment and equipment footprint. Furthermore, a continuous testing was operated for 200 h in ternary furfural/acetic acid/water simulated hydrolysate, highlighting the long-term membrane stability in realistic applications. High performance and long-term stability made MAPs/PEBA MMMs potential candidates for industrial furfural production.
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CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Wei Guo,Jing Hou,Tiesong Lin,Peng He
This study focused on joining high volume fraction SiC particles reinforced aluminum matrix composites (55 vol% SiC p /Al) with 50SnO–20ZnO–30P 2 O 5 (SZP) glass directly in air. Prior to joining, various properties of the SZP glass and its wettability on the composites were investigated. The results showed that the coefficient of thermal expansion of the glass was 10.58 × 10 -6 /°C (20–369 °C), which closely match with 55 vol% SiC p /Al composites. The glass transition, crystallization, and softening temperature were identified to be 369, 397, and 486 °C, respectively. Subsequent wetting tests confirmed excellent wettability of the glass on the composites. The joint exhibited sound bonding that was free of defects when brazed at 550 °C for 10 min Zn 2 P 2 O 7 was formed adjacent to the composites due to the crystallization of the glass. The mechanical properties of the joint were proven to be suitable, exhibiting an average shear strength of 55.3 MPa.
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ACS Omega
·
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
·
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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高影响因子
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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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
CARBON
·
2018
·
IF 7.082
Baisong Guo,Biao Chen,Xinming Zhang,Xi Cen,Xinhua Wang,Min Song,Song Ni,Jianhong Yi,Tao Shen,Yong Du
In this work, the effects of aluminum carbide (Al 4 C 3 ) on the mechanical properties and thermal behaviors of Al based composites reinforced by SiC and carbon nanotubes (CNTs) were investigated. The formation of Al 4 C 3 was precisely controlled in the temperature range from 530 °C to 630 °C (80%–95% of the Al melting point) during the post heat treatment. Microscopy observations revealed that Al 4 C 3 rods are originated from CNTs instead of SiC particles. Quantity and size of Al 4 C 3 are highly dependent on the heat treatment temperature. It was found that the mechanical properties of the Al based composites were significantly affected by the size of Al 4 C 3 . Moreover, the formation of Al 4 C 3 helps to decrease the coefficient of thermal expansion (CTE) of the composites due to the consumption of Al and the enhanced interfacial bonding . This study provides a potential approach for ameliorating the mechanical and thermal performances of CNTs reinforced metal matrix composites .
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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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