SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yuanyuan Zhang,Jing Wang,Wanxiang Yi,Aliya Tiemuer,Hui Yu,Yi Liu,Dan Su
Monoamine oxidase B (MAO-B) activity has been observed abnormally elevated in Parkinson’s disease patients and can be used as a potential biomarker. Herein, we report an activatable frequency upconversion luminescence (FUCL) MAO-B nano-probe (NIR-MNP) capable of highly specific and real-time MAO-B imaging in biological samples. The turn-on FUCL effect is beneficial to obtaining high-quality imaging and penetrating tissue to achieve in vivo imaging, making it stand out from the existing probes. Moreover, we used NIR-MNP to confirm the role of MAO-B inhibitor in delaying Parkinson’s disease (PD) progression in mouse PD models through bio-imaging technique in vivo. Finally, our study may offer a visual way help researchers to gain further insight into the involvement of MAO-B in PD onset and progression in animals.
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DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2016
·
IF 2.264
Jiasheng Lai,YiMing Qin,Lan Yu,Chunyan Zhang
A series of Mn x Cd 1−x S (MCS) solid solutions hollow spheres (x=0.0, 0.20, 0.33, 0.50 and 0.67) have been synthesized with the assistance of l -Glutathione (GSH) by a simple hydrothermal route for the first time. Different characterization techniques, including X-Ray diffraction (XRD), atomic absorption spectroscopy (AAS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller surface area (BET), UV–vis and diffuse reflectance spectra (DRS) are performed to investigate the structural and optical properties of the as-prepared samples. The experiment of rhodamine B (RhB) decoloration indicates that all the MCS samples show higher photo-catalytic activities than commercial CdS under visible light irradiation. Among them, the Mn 0.33 Cd 0.67 S exhibits the highest photo-catalytic activity. The superior photo-catalytic activity of MCS samples may be attributed predominantly to the synergistic effect of the appropriate band-gap structure as well as the special hollow spherical morphology which makes MCS samples have the ability to harvest exciting visible-light due to multiple scattering within the interior space. Furthermore, the Mn 0.33 Cd 0.67 S shows well stability, the photo-catalytic activities do not decrease significantly after six recycles. The work may open a novel strategy to fabricate multi-component chalcogenide solid solutions hollow spheres.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Soft Matter
·
2011
·Vol. 7
·期 9
·4156-4159
·
IF 4.457
Hongwei Xia,Junpeng Zhao,Cong Meng,Ying Wu,Yijie Lu,Jingxia Wang,Yanlin Song,Lei Jiang,Guangzhao Zhang
Amphoteric one-dimensional photonic crystal (PC) based on polystyrene-b-poly(2-vinyl pyridine) (PS-b-P2VP) block copolymer was developed by intercalation polymerization of acrylic acid and 2-hydroxyethyl methacrylate in the partly quaternized P2VP (QP2VP) layers. The amphoteric PC reversibly exhibits a high first Bragg peak position (λmax > 700 nm) at both acidic and basic pH values where the QP2VP layers are positively and negatively charged respectively. The minimum λmax (300 nm) at pH 5.5 can be observed due to charge screening. The PC with a U-shaped pH response also shows good durability.
研究领域:
材料科学
·
化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 45
·21560-21567
·
IF 3.925
Jinyang Liu,Yan Zhou,Xiuniang Tan,Shengjiang Zhang,Chunjiao Mo,Xiaobo Hong,Taolong Wu,Xuecai Tan,Yanjuan Liao,Zaiyin Huang
The establishment of heterojunctions is an effective way to improve the performance of semiconductor photocatalysts as a solution to solve environmental pollution problems; however, the decomposition efficiency of organic pollutants driven by sunlight remains a challenge. Herein, CoS2-decorated CdS hetero-junctions as highly efficient photocatalysts were rationally synthesized via a three-step process and CoS2-decorated CdS composites were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV-Vis diffusion reflectance spectrometry, fluorescence spectroscopy analysis, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, and transient photocurrent measurement. Using organic dyes rhodamine B (Rh B) and nitenpyram (NTP) as model pollutants, the performance of the CoS2-decorated CdS composites for the degradation of model pollutants were evaluated. Among them, the material with the best performance can degrade 99.5% Rh B and 92.5% NTP within 120 min. Furthermore, the catalyst still maintained its high catalytic activity after five cycles. This work provides a new idea for developing efficient and inexpensive hetero-junctions as photo-catalysts.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 130
·期 6
·4137-4146
·
IF 1.395
Yan-Ling Luo,Xiao-Li Yang,Feng Xu,Ya-Shao Chen,Zhuo-Ma Ren-Ting
A novel A 2 BA 2 -type thermosensitive four-armed star block copolymer, poly( N -isopropyl acrylamide) 2 - b -poly(lactic acid)- b -poly( N -isopropyl acrylamide) 2 , was synthesized by atom transfer radical polymerization and characterized by 1 H-NMR, Fourier transform infrared spectroscopy, and size exclusion chromatography. The copolymers can self-assemble into nanoscale spherical core–shell micelles. Dynamic light scattering, surface tension, and ultraviolet–visible determination revealed that the micelles had hydrodynamic diameters ( D h ) below 200 nm, critical micelle concentrations from 50 to 55 mg/L, ζ potentials from −7 to −19 mV, and cloud points (CPs) of 34–36°C, depending on the [Monomer]/[Macroinitiator] ratios. The CPs and ζ potential absolute values were slightly decreased in simulated physiological media, whereas D h increased somewhat. The hydrophobic camptothecin (CPT) was entrapped in polymer micelles to investigate the thermo-induced drug release. The stability of the CPT-loaded micelles was evaluated by changes in the CPT contents loaded in the micelles and micellar sizes. The MTT cell viability was used to validate the biocompatibility of the developed copolymer micelle aggregates. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4137–4146, 2013
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产品关联
DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2018
·
IF 4.432
JinFeng Liao,YanPeng Jia,BeiYu Wang,Kun Shi,ZhiYong Qian
In our study, a hybrid alginate hydrogel cross-linked by calcium gluconate crystals deposited in poly(ε-caprolactone)-b-poly(ethylene glycol)-b-poly(ε-caprolactone) (PCL-PEG-PCL, abbreviated as PCEC) porous microspheres was developed for skin engineering. The diameter of microspheres was ∼212 μm, and the pore size was ∼8 μm. The PCEC porous microspheres supplied different functions in the hydrogel: (1) Calcium gluconate crystals were loaded in the inner pores of the microspheres, which can induce alginate hydrogel to cross-link in a few minutes once they were mixed. (2) The porous structure of the microspheres provided more anchor points for fibroblast attachment and growth, resulting in the enhancement of cell growth in the hybrid hydrogel. The PCEC microspheres/Alg hydrogel (MPs/Alg hydrogel) possessed excellent compatibility, because cell viability remained around 100% even at a concentration of 500 μg/mL. Meanwhile, the morphology of 3T3 and L929 cells attached on both PCEC porous microspheres and MPs/Alg hydrogel were confirmed by confocal laser spectrometry (CLSM). What’s more, MPs/Alg hydrogel promoted wound regeneration in a full-thickness skin defect model of rats. The mild inflammation reaction existed at the early stage of wound repair and gradually disappeared. These findings suggested that MPs/Alg hydrogel may possess great potential in the application of skin tissue engineering.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Jinghui Zhu,Ya Liu,Liubiao Zhong,Jianyong Wang,Huanhui Chen,Sanfei Zhao,Yejun Qiu
Herein, a novel composite nanofiber , which consists of TiO-TiO 2 heterostructure nanoparticles and boron, nitrogen co-doped carbon nanofibers (BNCNF), has been successfully prepared through a facile electrospinning method. Remarkably, as interlayer for Li S batteries, the TiO-TiO 2 heterostructure not only enhances the adsorbability of the interlayer to lithium polysulfides (LiPSs) via the Lewis acid-base interactions, but also accelerates the redox reaction kinetics of the Li S batteries dramatically. Moreover, the BNCNF as a flexible framework can remit the volumetric change of the sulfur cathode, physically retard the migration of LiPSs and chemically adsorb to the LiPSs. Attributing to the synergistic effect of TiO-TiO 2 nanoparticle and BNCNF membrane, the Li S batteries with the novel composite interlayer (named as TiO-TiO 2 /BNCNF) exhibit outstanding cycling stability and high discharge capacity, especially at high current density. With the sulfur loading of 2.5 mg cm −2 , the cell with the TiO-TiO 2 /BNCNF interlayer delivers a high initial discharge capacity of 1014.7 mA h g −1 with a decay rate of 0.092% over 400 cycles at 0.5C, and also possesses excellent initial discharge capacity of 650.0 mA h g −1 with a decay rate of 0.068% over 120 cycles even at 2.0C.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Cell Reports Physical Science
·
2021
·
IF 0
Ming Shi,Hongpeng Zhou,Wenming Tian,Bin Yang,Songqiu Yang,Keli Han,Rengui Li,Can Li
Although bismuth (Bi)-based halide perovskites have attracted profound attention in photocatalysis, the undesirable photophysical properties are not well modulated, and the effect of surface structure on adsorption and activation of reactant molecules is still unclear. Here, we report the structural design, via precise incorporation of antimony (Sb) atoms into the host lattice of Cs 3 Bi 2 Br 9 , of a series of B-site bimetallic perovskites (Cs 3 Sb x Bi 2-x Br 9 , 0 ≤ x ≤ 2) with tunable band structures. The incorporation of Sb dramatically enhances the separation and transfer of photogenerated charges and prolongs their lifetimes. Considering these advantages, Cs 3 SbBiBr 9 exhibits significantly enhanced photocatalytic activities in challenging benzylic C–H activation while maintaining a high selectivity of 96%. Theoretical calculations reveal that the introduction of Sb breaks the symmetry of the local structure and leads to asymmetric charge distribution that not only increases the adsorption capacity for methylbenzene but also reduces the energy barriers for C–H bond activation.
研究领域:
材料科学
·
光化学
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DOI
JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Xiaolong Zhang,Hui Zheng,Shilei Jin,Yuhong Jiang,Yaxin Wang,Yang Liu
Multifunctional nanocomposites with well-defined structures and optimized electromagnetic properties are highly desirable in surface-enhanced Raman scattering (SERS) and catalytic reduction reactions. We report a novel multifunctional Fe 3 Pt–Ag nanoparticle with efficient SERS performance and excellent catalytic activity. Fe 3 Pt–Ag shows an obviously enhanced SERS effect, which is evaluated by enhanced Raman signal of Rhodamine B (RhB). Efficient SERS performance of Fe 3 Pt–Ag is attributed to the optical property of local surface plasmon resonance of Ag nanoparticles (NPs). Importantly, spontaneous catalytic reduction reactions of RhB illustrate that Fe 3 Pt–Ag possesses good catalytic performance. In combination with the theories of pseudo-first-order kinetics, catalytic reduction reactions are analysed in detail, and experimental data are in line with theoretical results. Fe 3 Pt–Ag can be easily recycled at least six times via an external magnetic field , elaborating that our developed Fe 3 Pt–Ag can be applied to protect environment as a novel composite material.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yichuan Li,Guofu Zhu,Yu Wang,Yongming Chai,Chenguang Liu,Shengbao He
Oriented molecular sieve membranes prepared on the surface of a specifically shaped substrate have been applied in the separation and catalysis process, but there is no report on the directional growth of molecular sieve membranes on the surface of spherical substrates. Here, a simple in situ crystallization method was employed to successfully prepare a single layer of b-oriented continuous titanium silicalite-1 (TS-1) molecular sieve membrane on the surface of 2-mm alumina beads. First, a titania intermediate layer was loaded on the surface of beads by the dipping method, and the surface was then modified with the TBOT modification solution. The ratio of the precursor solution was n(TEOS):n(TBOT):n(TPAOH):n(H 2 O) = 1:0.010:0.15:40 and was crystallized at 180 °C for 72 h to prepare the membrane. The content of the templating agent and water affected the size of TS-1 crystal grains and membrane crosslinking—both in turn influenced the continuity and orientation of the molecular sieve membrane. Spherical membrane catalyst was applied to catalyze the epoxidation of chloropropene in a fixed bed reactor, and the conversion of hydrogen peroxide and selectivity of epichlorohydrin attained 87.4% and 93.2%, respectively. This work provides a foundation for the design of novel TS-1 immobilized catalyst.
研究领域:
化学工程
·
催化材料科学
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DOI
高影响因子
Journal of Physical Chemistry C
·
2012
·
IF 4.805
Yudi Guo,Dongyan Tang,Zailin Gong
We present the fabrication of superhydrophobic surfaces by electrospraying structure controlled poly(methyl methacrylate-bromine) (PMMA-Br) homopolymer and degree of fluorination controlled poly(methyl methacrylate)-b-poly(dodecafluoroheptyl methacrylate) (PMMA-b-PDFMA) copolymers synthesized via atom transfer radical polymerization (ATRP). The flow rate has great effects on the surface hydrophobicity of PMMA50.6, and superhydrophobic surface was obtained at a higher flow rate of 5 μL/min. For fluorinated diblock copolymers, superhydrophobic surfaces can be obtained by electrospraying PMMA50.6-b-PDFMA0.8 and PMMA147.9-b-PDFMA17.5 at the selected flow rates. X-ray photoelectron spectroscopy (XPS) detections reveal that, during the film formation, more hydrophobic surfaces would be fabricated due to the surface segregations of C–C and C–H groups with THF as solvent instead of C–O–C═O group with DMF as solvent. This investigation may be of great value in fabricating superhydrophobic polymer materials.
研究领域:
材料科学
·
表面化学
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DOI
高影响因子
Catalysts
·
2020
·Vol. 10
·期 12
·1480
·
IF 3.52
Wei Guo,Libin Yang,Jinghao Lu,Peng Gao,Wenjing Li,Zhiying Feng
To effectively improve photocatalytic activity, the morphology and crystallinity of semiconductor photocatalysts must be precisely controlled during the formation process. Self-aligned Nb2O5nanotube arrays have been successfully fabricated using the electrochemical anodization method. A novel growth mechanism of Nb2O5nanotubes has been proposed. Starting from the initial oxidation process, the “multi-point” corrosion of fluoride ions is a key factor in the formation of nanotube arrays. The inner diameter and wall thickness of the nanotubes present a gradually increasing trend with increased dissociative fluorine ion concentration and water content in the electrolyte. With dehydroxylation and lattice recombination, the increased crystallinity of Nb2O5represents a reduction of lattice defects, which effectively facilitates the separation and suppresses the recombination of photo-generated carriers to enhance their catalytic degradation activity.Keywords:Nb2O5;nanotube;growth mechanism;crystalline;photocatalysis
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）