COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Xinyue Wang,Huan Cheng,Yuanzhi Min,Xian Li,Lijun You,Jumei Li
In this study, a crystalline mesoporous ZrO 2 interlayer allowing for enrichment capability and photocatalytic activity was introduced to develop a novel magnetic Fe 3 O 4 /m-ZrO 2 /Ag nanocomposite combined with excellent SERS activity and photocatalytic property. The coverage of Ag nanoparticles on Fe 3 O 4 /m-ZrO 2 /Ag was well controlled to tune their SERS sensitivity by varying the feed amount of AgNO 3 . Several characterization methods were utilized to investigate their composition, morphology and crystal structure. The SERS experiments demonstrated Fe 3 O 4 /m-ZrO 2 /Ag nanocomposites possessed markedly SERS sensitivity, exceptional signal reproducibility and excellent storing stability. They could sense R6G and Cr (VI) at the concentrations of 10 −9 and 5 × 10 −8 M, respectively. Beyond that, the Fe 3 O 4 /m-ZrO 2 /Ag nanocomposites effectively accomplished recyclable detecting R6G and Cr (VI) in 5 cycles through facile photocatalytic removal of pollutants under UV irradiation. Altogether, the novel Fe 3 O 4 /m-ZrO 2 /Ag nanocomposites prepared in this study have high SERS sensitivity and good photocatalytic performance, which is of great significance for environmental detection and ecological restoration.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Longming Jin,Lijie Hu,Songmiao Liang,Zhiliang Wang,Guoyang Xu,Xingsheng Yang
The organic solvent nanofiltration (OSN) membranes are an attractive candidate that enable carbon-neutral nature in both isolation and purification process. However, the application of current commercial available OSN membranes is severely hindered by their inferior permeability and selectivity. Here, using poly(m-phenylene isophthalamide) (PMIA) as support, a thin film composite (TFC) membrane with remarkably high permeability and ideal selectivity is fabricated in an industrial-scale manufacturing line and the relevant spiral-would module is successfully prepared. Optimization by the solvent activated, the TFC membrane with an extraordinary solvent permeation for acetone, methanol and acetonitrile are 63, 41 and 38 L m −2 h −1 ∙bar −1 , respectively. The nanofiltration performance of A-TFC membrane supports out-performs: at similar rejection (100%) the methanol and acetonitrile permeance increased dramatically at 10 and 5 times than current commercial OSN membranes, respectively. The spiral-would module is carried out in methanol and acetonitrile RB (1017 g mol −1 ) solution, which displays a high permeate fluxes and stable separation performances, methanol: 112 GPD, 98%; acetonitrile: 99 GPD, 99.3%. This work provided a large-scale facile process for high-performance PMIA based OSN membrane, and the fabrication of spiral-would module, which should be promising for manufacture of solvent-resistant TFC membrane in industrial scale-up.
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高影响因子
Journal of Zhejiang University-SCIENCE B
·
2023
·
IF 5.1
Xintong ZHANG,Xiaoxue GAI,Lihua XU,Wenxue MA,Qiaohan LIU,Bendong SHI,Cheng FANG,Jingzeng CAI,Ziwei ZHANG
The aim of this study was to investigate the role of selenoprotein M (SelM) in endoplasmic reticulum stress and apoptosis in nickel-exposed mouse hearts and to explore the detoxifying effects of melatonin. At 21 d after intraperitoneal injection of nickel chloride (NiCl 2 ) and/or melatonin into male wild-type (WT) and SelM knockout (KO) C57BL/6J mice, NiCl 2 was found to induce changes in the microstructure and ultrastructure of the hearts of both WT and SelM KO mice, which were caused by oxidative stress, endoplasmic reticulum stress, and apoptosis, as evidenced by decreases in malondialdehyde (MDA) content and total antioxidant capacity (T-AOC) activity. Changes in the messenger RNA (mRNA) and protein expression of genes related to endoplasmic reticulum stress (activating transcription factor 4 (ATF4), inositol-requiring protein 1 (IRE1), c-Jun N-terminal kinase (JNK), and C/EBP homologous protein (CHOP)) and apoptosis (B-cell lymphoma-2 (Bcl-2), Bcl-2-associated X protein (Bax), Caspase-3, Caspase-9, and Caspase-12) were also observed. Notably, the observed damage was worse in SelM KO mice. Furthermore, melatonin alleviated the heart injury caused by NiCl 2 in WT mice but could not exert a good protective effect in the heart of SelM KO mice. Overall, the findings suggested that the antioxidant capacity of SelM, as well as its modulation of endoplasmic reticulum stress and apoptosis, plays important roles in nickel-induced heart injury.
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PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2021
·
IF 3.196
Dandan Huang,Dezhi Yang,Yang Lv,Jianle Zhou,Liang Li,Jiangping Xu,Xuemei Yang,Zhengzheng Zhou
Cocrystal hydrate accounts for a small percentage of cocrystals of poorly water-soluble drugs, and still lack the explanation on its cause of formation. In this study, a cocrystal hydrate with a novel phosphodiesterase-4 (PDE-4) inhibitor, chlorbipram, is prepared and characterized using multi-techniques. The dissolution behavior, ternary phase diagram and theoretical calculations are further performed and discussed. Chlorbipram: m-Hydroxybenzoic acid (ChBP-MHBA, 1: 1) cocrystal hydrate presents approximate equivalent dissolution (1.61 mg/mL) in comparison with ChBP (1.90 mg/mL) in isopropanol/water (1: 1, v/v) solution. Ternary phase diagram plotted in ethyl acetate solvent suggests that ChBP-MHBA cocrystal hydrate has an optimum mass percentage range from (2.91%: 2.64%: 94.45%) to (3.20%: 10.74%: 86.06%) among ChBP, MHBA and ethyl acetate. There are two lattice waters in each unit cell of ChBP-MHBA cocrystal hydrate, accounting for 4.5% proportion of the cell volume using contact surface calculations. Molecular Electrostatic Potential Surface (MEPS) investigations indicate that the strong hydrogen bonds are formed within the cocrystal lattice, which are between the global minimum values of ChBP/MHBA and the global maximum values of lattice water. In summary, lattice water plays an important role in the formation of cocrystal hydrate, providing hydrogen atom donor and forming hydrogen bonds to support its three-dimensional crystal structure.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Shuo Shan,Jie Li,Xuan Zhao,Siwen Pi
M-type barium ferrite with the formula Ba 1− x Sm x Fe 12− y Nb y O 19 ( x = 0.00–0.10, y = 0.00–0.20), which was co-doped with Sm 3+ and Nb 5+ ions, was synthesized experimentally by a modified solid-phase reaction method. The crystal structure of samples was determined by X-ray diffraction, which confirmed that they were of high purity. The X-ray diffraction data were fitted with a full-spectrum correction using GSAS software. By Fourier transform infrared spectroscopy, the samples were observed to exhibit bands due to tetrahedral and octahedral sites at 598 cm −1 and 445 cm −1 , respectively. The samples were examined by field emission scanning electron microscopy, which showed that they partly comprised hexagonal structures but mostly consisted of irregular structures with rounded edges. Characterization of the elemental contents of the samples by energy-dispersive spectroscopy revealed an increase in the contents of Sm and Nb and a decrease in the contents of Ba and Fe. The magnetic properties of the samples were examined using a vibrating sample magnetometer. The results showed that the saturation magnetization and residual magnetization of the samples decreased slightly with an increase in the contents of the dopants. The coercivity reached its maximum value, namely, 3367.53 Oe, when x = 0.04 and y = 0.08.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 47
·e54705
·
IF 3
Wanli Yue,Ying Cao,Ruikai Han,Libing Ren,Simeng Liu,Fan Liu,Jianxin He,Weili Shao,Li Chen
Particulate matter (PM) has a significant impact on air quality, especially the PM produced by automobile exhaust and high temperature environment. Therefore, it is of great significance to develop a technology that can effectively intercept fine PM under high temperature conditions. This study reports the construction of poly(m-phenylene isophthalamide) (PMIA) nanofiber-reinforced polyimide aerogel (PPNFAs) filters using freeze-drying and electrospinning for high temperature filtration. After 100 compression cycles, the maximum compressive stress of PPNFAs is reduced by only 15%. When the content of PMIA is 0.65 wt%, PPNFAs has a high porosity (97.35%), high specific surface area (8.87 m 2 g −1 ) and highest dust holding capacity (124.8 m 2 g −1 ). After 15 days of continuous heating test at 300°C, the filtration efficiency of PPNFAs filter for different diameter particles of impurities remained above 98%. Therefore, the PPNFAs filter prepared in this study provides a new design concept for a new generation of high temperature filters.
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高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Daixiong Zhang,Qing Xiang
As one of most studied MOFs , extensive efforts have been devoted on the novel strategy for tailoring the size of zeolitic imidazolate framework (ZIF-8). We report here a facile and general method that enables the size-controllable engineering of zeolitic imidazolate framework (ZIF-8) by changing the addition order of Zn(NO 3 ) 2 ·6H 2 O (A) and 2-methylimidazole (B), which is very different from the all reported methods. Significant size difference for ZIF-8 s was observed between adding A-methanol solution to B-methanol solution and adding B-methanol solution to A-methanol solution under room temperature magnetic stirring. The influence of addition order on the crystal size was also applicable for preparing ZIF-8 encapsulating metal precursor (M-ZIF-8). We believe that this work not only pave a new way for efficient and general size-controllable design of ZIF-8 and M-ZIF-8, but can be also bridged with other size engineering methods (such as solvothermal method).
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JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Meng Li,Yuanyong Ouyang,Wenzhong Yang,Yun Chen,Kegui Zhang,Zhaoshun Zuo,Xiaoshuang Yin,Ying Liu
This work tests the anti-corrosion ability of three imidazolium-based ionic liquids with different anions—bis(fluorosulfon)imide ([FSI] − ), bis(trifluoromethylsulfonyl)imide ([NTF 2 ] − ) and bis(pentafluoroethylsulfon)imide ([BETI] − )—on carbon steels in 1 M HCl solution at 298 K. Electrochemical impedance spectroscopy (EIS) indicated that increasing the number of –CF 2 groups in the anion vastly enhanced the corrosion-inhibition efficiency ( η ). Even at small concentrations (1.25 mM), [(OHC 2 )MIm][BETI] achieved an η of 86%. The polarisation curve verified that [(OHC 2 )MIm][BETI] acted as a mixed-type inhibitor and that its adsorption followed the EI-Away adsorption model. Scanning electron microscope (SEM) imaging intuitively confirmed the superior inhibition performance of [(OHC 2 )MIm][BETI]. X-ray photoelectron spectroscopy (XPS) showed that [(OHC 2 )MIm][BETI] was stably absorbed on the carbon-steel surface. Contact angle measurements indicated that adding the –CF 2 groups effectively decreased the hydrophilicity and surface energy of carbon steel from 69.39 to 19.93 mJ/m 2 , hindering the adsorption of water molecules. Moreover, a frontier molecular orbital theory (FMOT) study confirmed that the –CF 2 groups enhanced the donation and drawing of electrons, and molecular dynamics (MD) simulations revealed that they reduced the interaction energy (E interact ) values between the corrosion inhibitor molecule and the iron surface (from −321.08 to −612.74 kJ·mol −1 ). It was inferred that among the three ionic liquids, [(OHC 2 )MIm][BETI] absorbed most strongly to the carbon-steel surface.
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高影响因子
Sustainable Chemistry and Pharmacy
·
2021
·
IF 4.508
Jingbao Wang,Jing Jing,Li Feng,Hailin Zhu,Zhiyong Hu,Xuemei Ma
The corrosion inhibition behavior and adsorption mechanism of three novel synthetic surfactants in 1 M HCl solution on carbon steel were investigated. The PP results confirmed that all the synthetic surfactants behave as mixed-type inhibitors, while the EIS results validated the existence of a protective layer by the adsorption of inhibitor molecules on the carbon surface. T 3 was observed to offer the highest inhibition efficiency ( η w , 96.28%) at 1 mM by the static weight loss measurements due to two different hydrophobic chains which form a more compact film with the crosswise arrangement. SEM/EDS and XPS results revealed the formation of the surfactants film on the carbon steel surface. Molecular dynamics simulation (MD) was further executed to determine the adsorption mechanism in molecular level insights. In addition, a linear correlation between surface activity ( γ ) and corrosion inhibition efficiency ( η w ) was verified. The adsorption of the prepared surfactants followed the Freundlich isotherm at different concentration ranges. Moreover, the bilayer/multilayer adsorption mechanism was also proposed and confirmed by experimental, adsorption isotherm studies and MD. Hence, both MD simulations and experimental results revealed the analogous inhibition with the order follows: T 3 > T 2 > T 1 .
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高影响因子
RSC Advances
·
2019
·Vol. 9
·期 52
·30249-30258
·
IF 3.049
Feng Yang,Yu Liu,Tong Liu,Shuan Liu,Haichao Zhao
In this work, a water-soluble host–guest complex containing carboxymethylated beta-cyclodextrin (CM-β-CD) and an aniline trimer (AT) was synthesized. The application of AT–CM-β-CD as an inhibitor for alleviating the corrosion of Q235 carbon steel in 1 M HCl solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Results showed that the inhibition efficiency was significantly increased in the presence of AT–CM-β-CD, and the inhibition efficiency was up to 99.2% when the concentration of AT–CM-β-CD was 250 mg L−1. Field emission scanning electron microscopy (SEM) and laser scanning confocal microscopy (LSCM) confirmed that the corrosion inhibitor had excellent corrosion inhibition effects due to the formation of an adsorption film on the surface of Q235 carbon steel. According to the data extracted from the Langmuir adsorption model, AT–CM-β-CD absorption involves both physisorption and chemisorption.
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PubMed
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-10
·
IF 4.011
Wang Yaozong,Sun Naikun,Zhang Yinlong,Zhao Bin,Zhang Zheyi,Zhou Xu,Zhou Yuanyuan,Liu Hongyi,Zhang Ying,Liu Jianguo
This study explored the applicability, cellular efficacy, and osteogenic activities of porous nano-hydroxyapatite/Poly (glycerol sebacate)-grafted maleic anhydride (n-HA/PGS-g-M) composite scaffolds. Nuclear magnetic resonance (NMR) analyses indicated that approximately 43% of the hydroxide radicals in PGS were displaced by maleic anhydride. Resonance bands at 1036 cm −1 occurred in scaffolds containing nHA powders, and peak areas increased when n-HA weight increased in PGS-M-n-HA-0.4, PGS-M-n-HA-0.5, and PGS-M-n-HA-0.6 scaffolds. The n-HA/PGS-g-M composite scaffolds exhibited porous microstructure with average pore size of 150–300 µm in scanning electron microscopy (SEM) analysis. Differential scanning calorimetry (DSC) identified the glass transition temperature (Tg) as −25–30 °C, indicative of quality resilience. The modulus of compressibility increased when n-HA content increased. Interestingly, viability of human adipose-derived stem cells (hADSCs) in vitro and expression of the osteogenic related genes RUNX2 , OCN , and COL1A1 was enhanced in the n-HA/PGS-g-M composite scaffolds compared to those factors observed in PGS-g-M scaffolds. Finally, simulated body fluid (SBF) tests indicated more apatite deposits on the surface of n-HA/PGS-g-M scaffolds compared to PGS-g-M scaffolds. Overall, porous n-HA/PGS-g-M composite scaffolds possessed acceptable biocompatibility and mechanical properties, and they stimulated hADSC cell proliferation and differentiation. Given these qualities, the composite scaffolds have potential applications in bone tissue engineering.
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PubMed
高影响因子
FOOD CHEMISTRY
·
2019
·
IF 5.399
Wenxi Yang,Keith R. Cadwallader,Yuping Liu,Mingquan Huang,Baoguo Sun
Toona sinensis (A. Juss.) M. Roem. (TS) possesses a unique and pleasant flavor and is consumed as a popular seasonal vegetable in certain parts of eastern and southeastern Asia. The potent odorants in raw and cooked TS were identified by combined sensory and instrumental analysis techniques, including sensory descriptive aroma profiling and two complimentary volatile isolation methods combined with gas chromatography-olfactometry (GC-O) techniques. Highly volatile odorants were determined by static headspace dilution analysis (SHDA)-GC-O, while those of intermediate- and semi-volatility were determined by solvent-assisted flavor evaporation-aroma extract dilution analysis (SAFE-AEDA). Among the numerous odorants identified by SHDA and SAFE-AEDA, ( E,E )- bis -(1-propenyl) disulfide was found to be predominant in both raw and cooked TS. In agreement with results of sensory descriptive analysis, hexanal, ( Z )-3-hexenal, ( E )-2-hexenal and ( Z )-3-hexen-1-ol contributed green, grassy and leafy aroma notes; while hydrogen sulfide, methyl thiirane, ( E,E )- bis -(1-propenyl) disulfide and ( E , Z )- bis -(1-propenyl) disulfide contributed pungent, sulfurous and alliaceous notes in TS.
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高影响因子
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