JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 16
·1-11
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IF 2.8
Chen Yuan,Huang Rui,Tao Cheng,Hao Hua,Yao Zhonghua,Liu Hanxing,Cao Minghe
Dielectric film capacitors are widely studied in recent years owing to their advanced power density and excellent mechanical and thermal stability. Despite the fact that extensive research has been done, the energy storage density still needs to be further improved. Herein, the highly polarized phase and amorphous phase are introduced into barium zirconate titanate simultaneously by the sol–gel method to fabricate (1− x )BaZr 0.2 Ti 0.8 O 3 − x Bi 0.5 Na 0.5 TiO 3 ((1− x )BZT− x NBT) amorphous films, researching the impact of amorphous phase and NBT levels on microstructure, energy storage, and dielectric properties of the films systematically. This material can generate a giant recoverable energy density of 86.35 J cm −3 and a great energy efficiency of 89.2% when x = 0.10, showing great thermal stability in energy storage property and dielectric property at 20–200 °C and excellent cycling reliability up to 10 5 cycles, which indicate the potential of 0.9BZT–0.1NBT film in the energy storage field. More importantly, there is no research on BZT-NBT films in the published literatures up to now. This work verifies the feasibility of this system in energy storage films and provides a new avenue to design lead-free dielectric materials.
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RENAL FAILURE
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2023
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IF 3
Chenlei Lv,Tianyang Cheng,Bingbing Zhang,Ke Sun,Keda Lu
Objectives: Diabetic nephropathy (DN) is the most common microvascular complication of diabetes mellitus. This study investigated the mechanism of triptolide (TP) in podocyte injury in DN.Methods: DN mouse models were established by feeding with a high-fat diet and injecting with streptozocin and MPC5 podocyte injury models were induced by high-glucose (HG), followed by TP treatment. Fasting blood glucose and renal function indicators, such as 24 h urine albumin (UAlb), serum creatinine (SCr), blood urea nitrogen (BUN), and kidney/body weight ratio of mice were examined. H&E and TUNEL staining were performed for evaluating pathological changes and apoptosis in renal tissue. The podocyte markers, reactive oxygen species (ROS), oxidative stress (OS), serum inflammatory cytokines, nuclear factor-erythroid 2-related factor 2 (Nrf2) pathway-related proteins, and pyroptosis were detected by Western blotting and corresponding kits. MPC5 cell viability and pyroptosis were evaluated by MTT and Hoechst 33342/PI double-fluorescence staining. Nrf2 inhibitor ML385 was used to verify the regulation of TP on Nrf2.Results: TP improved renal function and histopathological injury of DN mice, alleviated podocytes injury, reduced OS and ROS by activating the Nrf2/heme oxygenase-1 (HO-1) pathway, and weakened pyroptosis by inhibiting the nod-like receptor (NLR) family pyrin domain containing 3 (NLRP3) inflammasome pathway. In vitro experiments further verified the inhibition of TP on OS and pyroptosis by mediating the Nrf2/HO-1 and NLRP3 inflammasome pathways. Inhibition of Nrf2 reversed the protective effect of TP on MPC5 cells.Conclusions: Overall, TP alleviated podocyte injury in DN by inhibiting OS and pyroptosis via Nrf2/ROS/NLRP3 axis.
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PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2019
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IF 2.12
Xue-Pu Feng,Xin Na,Ya-Fei Guo,Rui Qian,Jian-Qiang Zhang,Zhen Chen,Rui Yang
1, 2-O, O-Diacetyllycorine (DALY) is one of the lycorine derivatives which has various biological properties. However, the bioavailability and clinical application of DALY was restrained because of its low water solubility and moderate antitumor activities . In order to improve its physicochemical properties, we prepared the inclusion complex of DALY with α-cyclodextrin (α-CD). The inclusion complex was characterized by UV, XRD, DSC , TG, 1 H, 2D NMR spectroscopy and its anticancer activity was evaluated in vitro against the human cell lines HCT116, A549, HepG2 and K562. The results demonstrated that DALY was encapsulated into the cavity of α-CD to form the complexes with 1:1 stoichiometry . The water solubility of DALY significantly increased for about 49 times after the inclusion complexation with α-CD. Furthermore, the cytotoxicity of DALY/α-CD against the examined cell lines was significantly increased for about 80 times compared to that of the free DALY. The improved physicochemical and biological properties of the inclusion complexes will be beneficial for its potential applications in the design and formulation of natural medicines.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Zheng Zhang,Xiao-Xin Kong,Miao Feng,Zhao-Hui Luo,Hui Lu,Gui-Ping Cao
In this Article, TS-1 was successfully synthesized on carbon nanotubes decorated nickel foam via in situ strategy forming the monolithic TS-1 (MTS-1). To the best of our knowledge, situ synthesis of the MTS-1 has not been reported. Carbon nanotubes decorated nickel foam has many aggregated pores (confined pores formed in aggregated structure) and a large surface area, and TS-1 particles could be dispersed on the surface of CNT@NF. MTS-1 had the characteristics of ultrafine nanoparticle and high content of skeleton titanium. High absorptive property and electrostatic interaction between CNT@NF and gels could accelerate the crystallization rate. The TS-1 particles were solidly immobilized on the CNT@NF, and the conversion rate was almost constant even after multiple reactions. The catalyst is easy to separate from liquid products after reaction, which offers an economical application prospect.
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APPLIED CATALYSIS A-GENERAL
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2019
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IF 4.63
Xin Zhang,Jianfeng Zhang,Huiyang Cao,Yahui Li
Although direct methanol fuel cells are promising as “green” power generators for portable electronics, their further development has been largely hampered by the low-efficiency of the commercial anode catalysts. In this study, (Ti 3 C 2 T x ) y -(MWCNTs) 1- y (0 ≤ y ≤1) supported Pt nanoparticle electrocatalysts were fabricated by a facile and scalable solvothermal strategy, after which two-dimensional(2D) Ti 3 C 2 T x nanosheets were found to be intercalated and connected by conductive one-dimensional(1D) MWCNTs. Used for methanol oxidation reaction, the Pt/(Ti 3 C 2 T x ) 0.5 -(MWCNTs) 0.5 catalyst exhibited the maximum electrochemical active surface area (ECSA, 154 m 2 /g) and excellent electrochemical activity (812.9 mA/mg), higher than not only Pt/Ti 3 C 2 T x and Pt/MWCNTs of this study, but also many other related catalysts reported in literature. In addition, the CO-poisoning behavior was also alleviated using Pt/(Ti 3 C 2 T x ) 0.5 -(MWCNTs) 0.5 instead of Pt/Ti 3 C 2 T x and Pt/MWCNTs. Such a superior performance can be attributed to the well dispersion of Pt nanoparticles (∼3.8 nm), enhanced layer distance of Ti 3 C 2 T x to capture more Pt nanoparticles, and conductive action of MWCNTs to connect Ti 3 C 2 T x . This study opens a new perspective for developing high performance supercapacitors using Pt catalysts supported by 1D-intercalated 2D materials.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
·
IF 2.298
Xing Cui,Hai Zhu,Chao-Hong He,Ke-Jun Wu
The thermal conductivities of 1-butyl-3-methylimidazolium l-tryptophan ([BMIM][l-trp]), water, ethanol, [BMIM][l-trp] + water, [BMIM][l-trp] + ethanol, water + ethanol, and [BMIM][l-trp] + water + ethanol were investigated from 283.15 to 333.15 K covering the whole scale of concentration at atmospheric pressure with the transient hot wire method. The thermal conductivities of pure [BMIM][l-trp] decease linearly from 0.180 to 0.177 W·m–1·K–1 with increasing temperature. The uncertainty of the measurement was less than 2% at the 0.95 confidence level. The experimental data of binary and ternary mixtures were correlated by a second-order Scheffé polynomial as a function of composition and temperature. The average relative deviation of the calculated values with experimental data was 0.58%.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
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IF 4.084
Tianping Huang,Jianxin Zou,Xiaoqin Zeng,Jie Wang,Huabing Liu,Wenjiang Ding
In the present work, NaBH 4 based hydrogen storage materials, 3NaBH 4 -(x)YF 3 -(1-x)GdF 3 composites, were prepared via mechanical ball milling with different values of x (2/3, 1/2, 1/3). The de-/rehydrogenation thermodynamic and kinetic behaviors of 3NaBH 4 -(x)YF 3 -(1-x)GdF 3 composites were systematically investigated. These composites showed a single endothermal peak of hydrogen desorption even though two metal fluorides were added simultaneously into NaBH 4 . All the 3NaBH 4 -(x)YF 3 -(1-x)GdF 3 composites showed reversible hydrogen sorption ability and the best hydrogen absorption kinetics was observed in the 3NaBH 4 -0.5YF 3 -0.5GdF 3 composite, with about 2 wt% hydrogen absorbed at 370 °C under 3.2 MPa H 2 pressure in 1 h. Its hydrogen absorption kinetic behaviors were correlated closely to a First-order reaction model based on experimental results. According to the pressure-composition-temperature (PCT) tests, the reversible hydrogen storage capacity increases, and the hydrogen desorption enthalpy decreases along with more GdF 3 addition. In particular, the desorption enthalpy with regard to the apparent Pauling's electronegativity (χ p ) of added metal cations can be described as Δ H d = −2748.21χ p +3852.99 kJ/mol H 2 , where χ p =(x)∙χ p (Y 3+ )+(1-x)∙χ p (Gd 3+ ). This research helps us to clarify the effect of co-addition of two rare earth metal fluorides on reversible hydrogen sorption in NaBH 4 .
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Nano Energy
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2018
·
IF 13.12
Wei Zhang,Yihui Zou,Hongli Liu,Shuai Chen,Xin Wang,Huawei Zhang,Xilin She,Dongjiang Yang
Electrocatalytic hydrogen evolution reaction (HER) plays a critical role in developing hydrogen and fuel cell technologies . At present, only platinum (Pt) and its compounds are thought to be efficient electrocatalysts for HER, particularly at all-pH values. However, the scarcity and high cost of Pt-based catalysts have seriously hindered their practical application in HER. Here, we report a two-step method for synthesizing single-crystalline (Fe x Ni 1-x ) 2 P nanosheets with exposed { 01 1 ¯ 1 ¯ } facets on Ni foam. Compared with pristine Ni 2 P, the (Fe x Ni 1-x ) 2 P nanosheets exhibit a dramatically improved HER activity (an overpotential of 81, 90, 103 mV at 10 mA cm −2 in acidic, neutral and alkaline media , respectively). Based on the density functional theory (DFT) calculations, it is observed that trace Fe-doping can lead to more charge accumulation around P active sites, which accordingly decreases the Δ G H* and Δ G H2O and promotes the catalytic activity .
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2019
·
IF 3.973
Weizhong Wang,Dinghua Liu,Dejian Li,Haibo Du,Jingtian Zhang,Zhengwei You,Maoquan Li,Chuanglong He
There is an urgent clinical demand to develop a functional small diameter vascular graft with long-term patency, which mainly relies on the anticoagulation and endothelialization of the vascular graft. In addition, improved degradation of vascular graft provides more space for cell infiltration and facilitates remodeling of blood vessel. In this study, an elastic and biomimetic nanofibrous vascular scaffold with improved degradability was prepared by adding poly(lactic-co-glycolic acid) (PLGA) into the poly(L-lactic acid) (PLLA)/poly(L-lactide-co-ε-caprolactone) (PLCL) blend using thermally induced phase separation (TIPS) technique. The incorporation of PLGA also improved the hydrophilicity of the composite scaffold. Then the vascular scaffold was surface modified by combination of heparin and stromal cell-derived factor-1 alpha (SDF-1α). The results of whole blood clotting kinetics and plasma recalcification profiles indicated that heparinized modification significantly enhanced the anticoagulation of vascular scaffold. In vitro cell culture assays demonstrated the immobilized SDF-1α facilitated recruitment of endothelial progenitor cells (EPCs), migration and proliferation of mature endothelial cells, human umbilical vein endothelial cells (HUVECs), and expression of VE-cadherin/CD144 and endothelial nitric oxide synthase (eNOS) genes in HUVECs, thereby accelerating the endothelialization of the modified vascular scaffold. Besides, the nanofibrous vascular scaffold modified with heparin and SDF-1α inhibited the proliferation of human vascular smooth muscle cells (HVSMCs). Therefore, the phase separated nanofibrous vascular scaffold modified with heparin and SDF-1α shows the promising in vitro performance as a functional small diameter vascular graft.
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高影响因子
JOURNAL OF CATALYSIS
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2018
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IF 6.759
Yuqing Wang,Li Yan,Cunyao Li,Miao Jiang,Ziang Zhao,Guangjin Hou,Yunjie Ding
Porous organic copolymer (designated as CPOL-BP&P(OPh) 3 ) containing vinyl biphephos moieties and tris(4-vinylphenyl)phosphite (P(OPh) 3 ) moieties was synthesized through a solvothermal copolymerization technique. After metalation with Rh precursor, an efficient heterogeneous catalyst Rh/CPOL-BP&P(OPh) 3 for the hydroformylation of 1-butene is presented with high activity (TOF = 2490.3 h −1 ) and regioselectivity (l:b = 40.0). The Rh/CPOL-BP&P(OPh) 3 catalyst has been investigated by using solid-state 13 C MAS NMR, in situ FT-IR spectroscopy, nitrogen sorption measurements, SEM, TEM, and XPS. Interestingly, in situ FT-IR spectra showed that Rh species tended to coordinate with both two kinds of P species from biphephos and P(OPh) 3 ligands in the Rh/CPOL-BP&P(OPh) 3 polymer frame rather than one kind of them. Therefore, the synergistic effect of three kinds of coordination compound formed between Rh species and both ligands could be responsible for the high activity and regioselectivity observed in hydroformylation of 1-butene.
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JOURNAL OF CHEMICAL THERMODYNAMICS
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2018
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IF 2.631
Qingsong Li,Bing Jia,Liping Wang,Mengmeng Yan,Hai Liu,Yingmin Yu
The liquid-liquid equilibrium (LLE) data for the water + 2,2,3,3-tetrafluoro-1-propanol + isopropyl ether/tert-butyl methyl ether ternary systems were measured at 298.2 K and 308.2 K under 101.3 kPa. The distribution coefficients and separation factors were employed to assess the capacity of solvents to extract 2,2,3,3-tetrafluoro-1-propanol from aqueous solution. Meanwhile, the reliability of the experimental data was confirmed using the Bachman and Hand equations. The NRTL and UNIQUAC models were used to correlate the experimental data and relevant binary interaction parameters were regressed. The root mean square deviations (RMSD) of the NRTL and the UNIQUAC models were less than 0.5%, which indicate that the experimental LLE data can be successfully correlated by both models.
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SCIENTIA HORTICULTURAE
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2018
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IF 1.76
Fujuan Wei,Jin Wang,Shuai Huang,Bi Gong
Lilies ( Lilium spp.) are in demand worldwide because of their superior commercial and ornamental value. To develop new and practical preservation technologies, effects of pre-harvest treatment of Promalin (a.i. 1.8% each of 6-benzyladenine (6-BA) and gibberellic acid (GA 4 + 7 )) and 1-Methylcyclopropene (1-MCP) on cut lily under cold storage were investigated. Oriental lily ‘Sorbonne’ was selected for this study. The field plants at coloring stage were sprayed with 25 mg L −1 Promalin, 30 μL L −1 1-MCP additionally, their combination (1-MCP + Promalin) was also tested. Deionized water was used as control. The flower stems were harvested 24 h later and stored at 3 ± 1 °C. Preservation effect and physiological changes, e.g. inflorescence life, flower life, opening rate, dry weight loss rate, respiration rate, ethylene production rate, malondialdehyde (MDA) content, lipoxygenase (LOX) activity, energy metabolism related indexes including adenosine triphosphate (ATP) content, energy charge, activities of ATP synthase (ATPase), succinate dehydrogenase (SDH), cytochrome oxidase (CCO) and Ca 2+ -ATPase were determined. The results showed that 1-MCP or Promalin treatment extended the vase life of stored cut lilies and inhibited the decline of the dry weight of petals, reduced respiration rate, ethylene production rate, LOX activity and the accumulation of MDA. They also maintained the activity of ATPase, Ca 2+ -ATPase, SDH, CCO, ATP content and energy charge of cut lilies at a higher level than control. 1-MCP + Promalin exhibited an additive effect. Combination treatment maintained the flower opening ability as high as 89.3% after five-week storage, control merely maintained it till 3 weeks. These data indicate growth regulators (e.g. 1-MCP or Promalin) can extend the storage life of cut lily ‘Sorbonne’ through cutting down respiration consumption and manipulation of energy balance.
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