Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 46
·16143-16151
·
IF 6.4
Yixiao Han,Leipeng Li,Chongyang Cai,Pei Li,Tao Li,Xiumei Han,Dengfeng Peng,Yanmin Yang
Mechanoluminescent materials have gained considerable attention over the past few years due to their unique characteristic of converting some useless mechanical actions in our daily life like compression and friction into usable light sources. However, the application scenarios of mechanoluminescent materials are still quite limited, mainly to stress sensors and visualization of pressure. Our work aims to solve this problem. Here, we demonstrate that Y2O2S:Er3+ with excellent mechanoluminescence (ML) could be used for energy-saving temperature sensing. Upon stimulation of external force, Y2O2S:Er3+ emits bright green ML that is attributed to the 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions of Er3+. These transitions are confirmed to conform with the Boltzmann distribution during a dynamic temperature-changing test. In addition, we confirm the feasibility of the ML thermometry framework in Er3+-doped Gd2O2S and Lu2O2S. Our work provides a new perspective for broadening the application scenarios of mechanoluminescent materials.
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2020
·
IF 6.274
Hui Yong,Xin Wei,Jifan Hu,Zeming Yuan,Ming Wu,Dongliang Zhao,Yanghuan Zhang
A composite catalyst Fe@C was successfully prepared by chemical blowing and carbonization method, at the same time its defect level, pore distribution and specific surface area were investigated. In addition, the Mg–Ce–Y + x wt.% Fe@C ( x = 1, 3, 6, 10) composites also were synthesized by mechanical ball-milling. The effect of the Fe@C content on hydrogen absorption and desorption property of the Mg–Ce–Y alloy was characterized by XRD, SEM , TEM, PCI , and DSC method. The activated composites exhibit an excellent absorption and desorption kinetic performance, which attributeed to the efficient catalysis of Fe@C composite catalyst. The Mg–Ce–Y + 6 wt % Fe@C composite exhibits the fastest hydrogen absorption/desorption kinetics and relatively lower decomposition temperature and it can absorb 90% of the maximum hydrogen capacity within 2 min and only takes 12 min to release the same amount of hydrogen under 300 °C. Besides, the dehydrogenation activation energy is reduced to 84.9 kJ/mol and the initial hydrogen release temperature is less than 250 °C, which is owing to the outstanding synergistic catalyst effect of Fe@C on Mg-based hydrogen storage alloy . However, the thermodynamic properties of the composites have not been improved, of which the enthalpy change is 80.6 kJ/mol.
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 64
·14654-14664
·
IF 4.857
Yi Cao,Peiyuan Tang,Yue Han,Wenfeng Qiu
Graphical Flexible film : Flexible thin films of La 2 Y x Zr 2− x O 3 (LNF- x ) ( x= 0, 0.1, 0.3, 0.5) nanofibers are synthesized and characterized. The LNF-0.1//LNF-0.1 flexible device shows good electrochemical performance and is of great significance in the field of next-generation flexible energy-storage devices and applications in portable and wearable electronics. With the rapid development of wearable electronics devices, there is increasing demand for the development of new flexible energy storage devices with high security, and this has become a hot research topic. Although flexible supercapacitors are considered to be high-performance energy-storage equipment because of their fast charging/discharging ability, long cycle life, good reliability, wide operating temperature range, and so on, there are still many drawbacks that need to be overcome. Herein, the La 2 Zr 2 O 7 (LZO) thin film is synthesized as a new energy-storage material by using a facile electrospinning method and calcination at low temperature. In addition, the mechanism of producing the flexibility of this film is determined by TG, IR, and XRD analyses. As previous studies have suggested that the charge storage of the LZO film can be attributed to the mechanism of oxygen intercalation, the Y element is doped into the LZO film to increase the concentration of oxygen vacancies. The changes in structural and electrochemical properties of La 2 Y x Zr 2− x O 3 (0≤ x ≤0.5) nanofibers (LNF- x ) with increasing Y content are studied carefully to obtain the best doping sample. The LNF-0.1 sample shows the highest areal capacitance of 605.3 mF cm −2 at 2 mA cm −2 , so a symmetrical flexible device is fabricated with LNF-0.1 electrodes. This device has a high energy density (76.7 μW h cm −2 at 2 mW cm −2 ), good cycling stability, and excellent mechanical flexibility. This study thus provides a new research trend for portable and wearable electronics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF PHARMACOLOGY
·
2021
·
IF 4.432
Yao Hua,Limei Zhou,Weidong Yang,Wenji An,Xiaolin Kou,Jian Ren,Hailang Su,Rong Chen,Zhengping Zhang,Jianjun Zou,Zhihong Zhao
Intracerebral hemorrhage (ICH) is a devastating disease, and there is currently no specific pharmacological treatment that can improve clinical outcomes. Y-2 sublingual tablets, each containing 30 mg edaravone and 6 mg (+) - borneol , is undergoing a phase III clinical trial for treatment of ischemic stroke in China. The purpose of the present study is to investigate the efficacy and potential mechanism of Y-2 in a rat model of collagenase IV injection induced ICH. Sublingual administration of Y-2 at the dose of 1, 3 and 6 mg/kg improved ICH-induced sensorimotor dysfunction, alleviated cell death and histopathological change, restored the hippocampal long-term potentiation (LTP), reduced brain edema and maintained blood-brain barrier (BBB) integrality in ICH rats. Further study demonstrated that Y-2 could reduce inflammatory response and oxidative stress by decreasing the levels of myeloperoxidase (MPO), ionized calcium-binding adaptor protein-1 (Iba-1), inflammatory cytokines and oxidative products, inhibit transcription factor nuclear factor-κB (NF-κB) activation, cyclooxygenase-2 (COX-2) and matrix metallopeptidase 9 (MMP-9) expression in brain tissue around in the core regions of hematoma . Importantly, the protective efficacy of Y-2 from ICH-induced injury was superior to edaravone. In conclusion, Y-2 sublingual tablets might be a promising therapeutic agent for the treatment of ICH.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2019
·
IF 5.128
Ze Zhang,Jun Cheng,Yi Qiu,Xi Zhang,Junhu Zhou,Kefa Cen
To clarify the conversion mechanism of methyl palmitate (C16:0) to produce jet biofuel over Ni/desilicated meso-Y zeolite catalyst, quantum chemistry calculation and verification experiments were conducted to evaluate three proposed competitive reaction pathways, in which hydrodecarboxylation pathway was more feasible than hydrogenolysis and decarboxylation pathways. It was found that overall enthalpy change to produce pentadecane (−130.2 kJ/mol) in hydrodecarboxylation pathway was lower than that to produce palmitic acid (−90.1 kJ/mol) in hydrogenolysis pathway and that to produce hexadecane (−68.6 kJ/mol) in decarboxylation pathway. The experimental results of hydrodeoxygenation and hydrocracking conversion of methyl palmitate into jet biofuel were consistent with quantum chemistry calculation, when conventional Y zeolite was modified into hierarchical mesoporous Y zeolite catalyst by desilication with NaOH and then loading Ni nanoparticles. The jet biofuel product selectivity reached a peak (64.8%) with reasonable composition distributions, when Ni/meso-Y zeolite was desilicated with 0.4 M NaOH to promote BET surface area (554.9 m 2 /g) and specific pore volume (0.340 cm 3 /g) with 2–10 nm mesopores. The relative content of pentadecane in liquid products was always higher than those of palmitic acid and hexadecane over Ni/meso-Y zeolite catalysts desilicated with various concentrations of NaOH. The main compositions of gas phase by-products in hydrodeoxygenation and hydrocracking conversion were CH 4 with selectivity up to 25.2% and CO 2 with selectivity of ∼10%, which agreed well with quantum chemistry calculation results.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Zhiqiang Xie,Congbiao Chen,Bo Hou,Dekui Sun,Heqin Guo,Jungang Wang,Debao Li,Litao Jia
The nature of high-silica H–Y acid sites in dimethoxymethane carbonylation is investigated by NH3 poisoning with a combination of reaction results, diffuse reflection infrared Fourier transform spectra, and NH3 temperature-programmed desorption. After NH3 poisoning of H–Y, ammonia desorption of zeolites NH4–Y was conducted at different temperatures to obtain catalysts HNH4–Y that gradually exposed different acid sites. The zeolites thus produced catalyzed dimethoxymethane carbonylation with a linear dependence of the conversion on the ammonia desorption temperature before the plateau stage. It was observed that strong Brønsted acids in zeolite Y catalyzed the reaction more selectively toward the main product methyl methoxyacetate, and weak Brønsted acids catalyzed the reaction more selectively toward the byproduct methyl formate. Furthermore, the turnover frequency of Brønsted acids varied significantly among the Brønsted acids and decreased with acid strength. This finding suggested that only 10.1–18.3% of the total Al in zeolite Y with Si/Al ratios of 15, 30, and 40 contributed to the total framework Brønsted acids.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2018
·
IF 1.712
Yingdi Luo,Qilei Zhang,Shanjing Yao,Dongqiang Lin
The importance of immunoglobulin Y (IgY) as a specific antibody equivalent to mammalian immunoglobulin G (IgG) is well recognized. However, production of highly purified IgY is still difficult due to the lack of specific purification methods. In this study, adsorption behaviors of IgY on four mixed-mode resins with functional ligands of 4-mercatoethyl-pyridine (MEP), 2-mercapto-1-methyli-midazole (MMI), 5-aminobenzi-midazole (ABI) and tryptophan-5-aminobenzi-midazole (W-ABI) were evaluated. The results showed that high adsorption ratio were found at pH 6.0–7.0 with little adsorption under acidic conditions. The resin with ABI ligand was then used to separate IgY from immunized chicken serum. An efficient process with IgY purity of 95% and recovery of 90% was developed after optimization of loading and elution pH and injection volume. The biological activity of the purified IgY was fully maintained. These results indicated that mixed-mode chromatography with specially-designed ligands has great potential for the separation of IgY from crude feedstock.
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2014
·
IF 4.384
Min Liu,Hui Liu,Shufen Sun,Xuejiao Li,Yanmin Zhou,Zhiyao Hou,Jun Lin
Porous hydroxyapatite (HAp) composite fibers functionalized with up-conversion (UC) luminescent and magnetic Na(Y/Gd)F4:Yb3+,Er3+ nanocrystals (NCs) have been fabricated via electrospinning. After transferring hydrophobic oleic acid-capped Na(Y/Gd)F4:Yb3+,Er3+ NCs into aqueous solution, these water-dispersible NCs were dispersed into precursor electrospun solution containing CTAB. Na(Y/Gd)F4:Yb3+,Er3+@HAp composite fibers were fabricated by the high temperature treatment of the electrospun Na(Y/Gd)F4:Yb3+,Er3+ NCs decorated precursor fibers. The biocompatibility test on MC 3T3-E1 cells using MTT assay shows that the HAp composite fibers have negligible cytotoxity, which reveals the HAp composite fibers could be a drug carrier for drug delivery. Because the contrast brightening is enhanced at increased concentrations of Gd3+, the HAp composite fibers can serve as T1 magnetic resonance imaging contrast agents. In addition, the composites uptaken by MC 3T3-E1 cells present the UC luminescent emission of Er3+ under the excitation of a 980 nm near-infrared laser. The above findings reveal Na(Y/Gd)F4:Yb3+,Er3+@HAp composite fibers have potential applications in drug storage/release and magnetic resonance/UC luminescence imaging.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2015
·
IF 2.947
Xiaoyan Shu,Long Fan,Xirui Lu,Yi Xie,Yi Ding
A series of pyrochlore structure oxides (Gd 1− x Nd x ) 2 (Zr 1− y Ce y ) 2 O 7 (0 ≤ x , y ≤ 1.0) were fabricated and investigated. The end member of A-site substitution (Nd 2 Zr 2 O 7 ) maintains the original pyrochlore phase, while the ultimate compositions of B-site and simultaneous substitution have transformed to a single defect fluorite structure from the XRD results. The Raman spectra reveal the local coordination changes resulting from exotic-atom substitutions, especially from the B-site substitution. The microtopography and element distribution of the ultimate composition Nd 2 Ce 2 O 7 in the discussed system are characterized through SEM and TEM. The density and Vickers hardness of the compounds are provided for the basic mechanical performance evaluation.
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2016
·Vol. 7
·期 10
·1922-1930
·
IF 5.687
Yanzhi Xu,Mengxiang Zhu,Minjie Li,Ying Ling,Haoyu Tang
Water-soluble thermoresponsive poly(γ-4-methylbenzyl-L-glutamate) bearing Y-shaped (i.e., oligo-ethylene-glycol and alkyl groups, such as 1-butyl, 1-hexyl, or 1-dodecyl) and triazolium tetrafluoroborate side-chains (PMBLG-OEG7/Cm-BF4, m = 4, 6, and 12) have been prepared by nucleophilic substitution of poly(γ-4-methylbenzyl-L-glutamate)-oligo-ethylene-glycol conjugates (PMBLG-OEG7) and various 1-alkyl bromide and ion-exchange reactions of triazolium bromide and NaBF4. Poly(γ-4-chloromethylbenzyl-L-glutamate) (PCMBLG) was derivatized into poly(γ-4-azidomethylbenzyl-L-glutamate) (PAMBLG), followed by reaction with propargyl functionalized polyethylene glycol monomethylether 350 (Pr-OEG7) via a copper-mediated 1,3-dipolar cycloaddition to yield PMBLG-OEG7. PMBLG-OEG7/Cm-BF4, m = 4, 6, and 12) adopted an α-helical conformation and showed lower critical solution temperature (LCST)-type phase behaviors in aqueous solutions. The cloud point temperature (Tcp) was significantly decreased with an increase in polymer concentration and salt (e.g., NaBF4) concentration. Elongating the alkyl chain length can further decrease the Tcp.
✓ 已验证
产品关联
DOI
高影响因子
BIOMATERIALS
·
2016
·
IF 8.387
Juan Li,Yuchen Tian,Dingying Shan,An Gong,Leyong Zeng,Wenzhi Ren,Lingchao Xiang,Ethan Gerhard,Jinshun Zhao,Jian Yang,Aiguo Wu
Targeted molecular imaging has attracted great attention in cancer diagnosis and treatment. However, most clinically used ultrasound contrast agents (UCAs) are non-targeted microbubbles seldom used for cancer imaging. Here, we fabricated fluorescent nanobubbles (NBs) by encapsulation of liquid tetradecafluorohexane (C 6 F 14 ) within biodegradable photoluminescent polymers (BPLPs) through an emulsion-evaporation process and conjugation of PNBL-NPY ligand for specific targeting of Y 1 receptors overexpressed in breast tumors. The developed PNBL-NPY modified NBs were uniform in size with good dispersibility and photostability, presenting good ultrasound enhancement. Further, in vitro and in vivo results indicated that the fabricated NBs exhibit high affinity and specificity to Y 1 receptor-overexpressing breast cancer cells and tumors with minimal toxicity and damage to organs. Our developed PNBL-NPY-modified NBs are novel targeted UCAs for safe, efficient and specific targeted breast cancer imaging, and may provide a new nanoplatform for early cancer diagnosis and treatment in the future.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2018
·Vol. 9
·期 9
·1095-1108
·
IF 4.927
Xiaoqi Zhao,Wentao Wu,Jian Zhang,Wenxue Dai,Youliang Zhao
Multicomponent miktoarm stars with multifunctional Y junctions may provide us with new insights into their physicochemical properties and prospective applications. Considering the unique role of a gas stimulus in smart materials and the promising gradient-type properties induced by combined stimuli, this study aims at the synthesis, thermoresponsive and self-assembly behaviors of an O2-, redox-, thermo-, and pH-responsive 3-miktoarm star quarterpolymer. A robust method involving controlled polymerization, amine–thiol–ene conjugation and hydrolysis was developed to achieve a poly(N-isopropylacrylamide-co-4-(2-(2,2,2-trifluoroethylcarbamoyl)ethylthio)-2-(acrylamido)-N-(2-hydroxyethyl)butanamide)-arm-poly(ε-caprolactone)-arm-poly(acrylic acid) star. Owing to the changes in amphiphilicity, chemical composition and mutual interactions, a single stimulus or various stimuli combinations could lead to switchable LCSTs and morphological transformations. Upon increasing pH, O2 treatment and oxidation, the copolymer solution was liable to exhibit enhanced LCST due to the improved hydrophilicity. The star quarterpolymer could self-assemble into multicompartment vesicles (pH 3.0), vesicles (pH 5.9) and small micelle/vesicle mixtures (pH 10) at ambient temperature. Upon thermo, redox and O2 stimuli, the assemblies formed at different pHs could be further converted into some other morphologies such as compound micelles and nanocapsules with hollow caves. Our research affords a general route to synthesize MMSs with tailored Y junctions, and the combination of the O2 stimulus with other stimuli may potentially expand the scope of multi-triggered properties and applications of star copolymers.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）