JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
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2021
·Vol. 109
·期 12
·2227-2236
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IF 3.368
Shuxian Shen,Xuzhao He,Xiaoyi Chen,Lingqing Dong,Kui Cheng,Wenjian Weng
Electrical stimulation has been proved to be critical to regulate cell behavior. But, cell behavior is also susceptible to multiple parameters of the adverse interferences such as surface current, electrochemical reaction products, and non-uniform compositions, which often occur during direct electric stimulation. To effectively prevent the adverse interferences, a novel piezoelectric poly(vinylidene fluoride-trfluoroethylene)(P(VDF-TrFE)) layer was designed to coat onto the indium tin oxide (ITO) planar microelectrode. We found the electrical stimulation was able to regulate the osteogenic differentiation of mesenchymal stem cells (MSCs) through calcium-mediated PKC signaling pathway. Meanwhile, the surface charge of the designed P(VDF-TrFE) coating layer could be easily controlled by the pre-polarization process, which was demonstrated to trigger integrin-mediated FAK signaling pathway, finally up-regulating the osteogenic differentiation of MSCs. Strikingly, the crosstalk in the downstream of the two signaling cascades further strengthened the ERK pathway activation for osteogenic differentiation of MSCs. This P(VDF-TrFE) layer coated electrical stimulation microelectrodes therefore provide a distinct strategy to manipulate multiple-elements of biomaterial surface to regulate stem cell fate commitment.
研究领域:
生物医学工程
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细胞生物学
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材料科学
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DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 33
·19247-19253
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IF 3.119
Ying Han,Junkai Huang,Hongyuan Liu,Yue Wu,Zhao Wu,Kemin Zhang,Qingjie Lu
The reduction of p-chloronitrobenzene (p-CNB) by sulfate green rust (GRSO4) was systematically studied. The results revealed that GRSO4 has a good removal effect on p-CNB. The removal efficiencies of p-CNB by GRSO4 improved with the increase of the pH value. The removal efficiencies in the presence of ions were better than that of GRSO4 alone, while natural organic matter (NOM) could adsorb p-CNB, which competed with GRSO4. The reductions of p-CNB by GRSO4 under different conditions followed pseudo-first-order reaction kinetics except for the reactions in the presence of NOM. p-CNB was converted into p-chloroaniline (p-CAN), which produced p-nitrosochlorobenzene and p-chlorophenylhydroxylamine as the intermediate products. The results of the X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed GRSO4 was gradually transformed into goethite. Fe(II) in the GRSO4 structure was the main electron donor involved in the reaction.
研究领域:
环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Haowei Liu,Pengchao Wu,Lumiao Hou,Xiaofan Zhang,He Zheng,Bolin Niu,Shaohua Liu,Jianwei Fu
Porous organic polymers (POPs) have great potential in air and water pollutant treatments. However, the cost-effective syntheis of novel POPs remains a challenge. In this work, we fabricated a new porous organic polymer with P-N linkage (PCPD) via a low-cost catalyst-free polycondensation between 3,3′-diaminobenzidine and hexachlorocyclotriphosphazene under solvothermal conditions. The chemical composition , microstructure and thermal property were characterized by FT-IR, SEM, TEM NMR, DSC , TGA and N 2 sorption . The adsorption performance of PCPD was also studied. The results revealed that PCPD owns good microporosity , N-rich skeleton as well as abundant amino/imine groups. Tested for CO 2 adsorption at 273 K/1 bar and 298 K/1 bar, PCPD exhibited superior CO 2 uptakes of 127.6 mg g −1 and 83.6 mg g −1 , respectively. Moreover, the isosteric heats of adsorption at low adsorption values was up to 33.3 kJ mol −1 . PCPD also delivered a superior removal performance towards toxic Cr (VI) from aqueous solution with equilibrium adsorption capacity of 205 mg g −1 and instantaneous adsorption capacity of 148 mg g −1 within 5 min at pH= 2. The Cr (VI) adsorption process is spontaneous and exothermic and well obeys intraparticle diffusion model, pseudo-second order kinetics , and Langmuir isotherm model. The plausible removal mechanism included electrostatic interaction, hydrogen bonding interaction, pore filling and the concurrent Cr (VI) reduction followed by in situ chelation on polymer adsorbent. PCPD would open a new field for efficient treatment of air and water pollutants due to its fascinating structure feature and excellent adsorption performance.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2023
·
IF 7.8
Xiaoxia Ye,Yi Lin,Wang Lin,Huiting Lin,Yuancai Lv,Chunxiang Lin,Yifan Liu,Jie Chen
As an emerging micro-pollutant, p -arsanilic acid ( p -ASA) exist widely in the environment, and it can form highly toxic arsenate and arsenite during the migration and transformation process, which greatly increases the risk of arsenic pollution in the ecosystem. Additionally, three-dimensional (3D) porous block materials have the advantage of stronger adsorption performance, faster adsorption rate and easy recovery, showing broad application prospects in water pollution control . Hence, the aminozed collagen fibers foam (ACFF) with 3D porous block structure was synthesized. The maximum adsorption capacity of ACFF for p -ASA was 476.19 mg·g −1 due to the rich honeycomb porous structure and the synergistic effect of electrostatic attraction , hydrogen bonding effect and amphiphilicity. Moreover, ACFF is not only easy to recycle, but also has good elastic recovery and regeneration performance. The pore size of ACFF was concentrated in the range of 25–5000 nm, and the porosity was 71.66%. ACFF may be an adsorbent with great potential for the removal of organoarsenic contaminants in water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
FLUID PHASE EQUILIBRIA
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2017
·
IF 2.473
Kai Kang,Xiaopo Wang
The experimental measurements for liquid densities of n -decane and p -xylene binary mixtures were performed over the entire composition with a high-pressure vibrating-tube densimeter. The temperature ranges for the present measurement were from 293.15 K to 363.15 K and the pressures were reached to 60 MPa. The experimental uncertainty is estimated to be 0.001 with 0.95 confidence level. Experimental density values were fitted by the modified Tammann–Tait equation. The PC-SAFT equation of state and Cibulka's equation was used to predict the densities of n -decane and p -xylene and its mixtures. In addition, derived volumetric properties, such as the excess molar volumes , the isothermal compressibility , and isobaric thermal expansivity, were calculated from the experimental density data. The effects of pressure and temperature on the derived properties were also discussed.
研究领域:
化学工程
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热力学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 28
·9744-9756
·
IF 4
Yanxia Wang,Xiude Hu
The development of new, efficient noble-metal-free photocatalysts is of great significance for the photocatalytic hydrogen evolution reaction. Herein, Co9S8 with a hollow polyhedral structure was synthesized by in situ sulfurization of ZIF-67, and subsequently, Co9S8@Ni2P composite photocatalytic materials were prepared by loading Ni2P on the surface of Co9S8 through a solvothermal method based on a morphology regulation strategy. The design of the 3D@0D spatial structure of Co9S8@Ni2P is favorable for the formation of photocatalytic hydrogen evolution active sites. Due to the excellent metal conductivity of Ni2P, Ni2P as a cocatalyst can accelerate the separation of photogenerated electrons from holes in Co9S8, thus providing a large number of available photogenerated electrons for photocatalytic reactions. It is worth mentioning that a Co–P chemical bond is formed between Co9S8 and Ni2P, which plays an active role in the transport of photogenerated electrons. The densities of states of Co9S8 and Ni2P were determined by density functional theory (DFT) calculations. The reduction of the hydrogen evolution overpotential and the formation of efficient charge-carrier transport channels on Co9S8@Ni2P were confirmed by a series of electrochemical and fluorescence tests. This study provides a new idea for the design of highly active noble-metal-free materials for the photocatalytic hydrogen evolution reaction.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
·
IF 8.4
Qing Fang,Qin Liu,Zongli Xie,Matthew R. Hill,Kaisong Zhang
Solvent-resistant nanofiltration membranes , capable of breaking “trade-off” between permeability and selectivity while resisting physical aging, hold crucial utility in developing advanced membrane materials and reducing energy consumption associated with solvent recovery. Herein, the development of scalable, mixed matrix membranes (MMMs) was presented based on polysulfone (PSf) substrate with ultra-high permeability and aging resistance. The upper selective layer was composed of poly-trimethylsilylpropyne (PTMSP) and two types of nano-fillers, namely poly-dichloroxylene ( p -DCX) and sodium dodecylbenzene sulfonate-molybdenum sulfide (SDBS-MoS 2 ). Under the influence of the additives, the redistribution of the free volume of the polymer as well as the internal spaces within additives creates additional pathways for solvent diffusion, thus increasing solvent permeance. Additionally, the combined effect of the two additives is likely to inhibit filler agglomeration and improve the overall effectiveness of the additives. Compared to pure PTMSP membranes, the p -DCX/SDBS-MoS 2 PTMSP MMMs exhibited enhanced methanol permeance (10.58 vs. 3.14 L m −2 h −1 bar −1 ) and RB rejection (99.23 vs. 96.13 %), which greatly exceeded that of current OSN MMMs. As anticipated, aging of the prepared membranes decelerated with the addition of the additives, and the methanol permeation loss rate decreased from 50.32 % to 13.23 % after 300 h. Molecular dynamics simulations explored by structural analysis revealed the mechanism for the significant improvement in methanol permeance and aging resistance. The membranes obtained were found to be highly industrially applicable, thereby offering the potential to reduce operation costs in energy-intensive separation processes.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Siqi Zhang,Shu Wu,Qi Wang,Mengxiang Guan,Bowen Yang,Guirong Peng,Xiaojia Zhao
P(VDF-HFP) is widely used in transistors, electret and artificial skin due to its excellent dielectric properties . In order to dramatically improve its dielectric constant, conductive fillers are used for doping, but the compatibility is not optimistic between the fillers and the PVDF . In this paper, PEDOT:PSS/P(VDF-HFP) all-organic films with interpenetrating network structure were prepared by the addition of H 2 O. The dielectric constant of the film with 0.5 wt % PEDOT:PSS reached up to 323 and the tanδ was only 0.48 (1 k Hz, 18 °C). The addition of the H 2 O made the small amount of PEDOT:PSS evenly distribute in the P(VDF-HFP), as a result, the percolation threshold decreased. Besides, molecular chains of PEDOT:PSS were overlapped to form a uniform network. This paper provided a novel preparation method for a uniform film with two kinds of matters with different compatibility.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Liping Zhao,Anqi Wang,Ailin Yang,Guihong Zuo,Jun Dai,Youjin Zheng
Exploring electrocatalysts with low cost and excellent performance for oxygen reduction reaction is still a significant challenge. In this paper, we introduce a novel strategy to fabricate ZnS, Fe, and P co-doped N enriched carbon (ZnFeSP/NC) via the direct carbonization of PVP/ZIF-8 combined with absorption, sulphurization , and phosphorization processes. The as-synthesized ZnFeSP/NC was used as electrocatalyst for oxygen reduction reaction (ORR). We explored the influence of Fe, S, and P elements on the ORR activity of the catalysts. It can be found that ZnS nanoparticles were formed and attached on the surface of the ZnFeSP/NC nanoparticles. α-Fe and P element were well dispersed on ZnFeSP/NC nanoparticles. Fe, S, and P element can highly enhance the ORR activity of the catalysts. Compared to Zn/NC, ZnFe/NC, and ZnFeS/CN, ZnFeSP/NC shows the optimal ORR performance with the half-wave potential of 0.859 V and a current density of 3.33 mA cm −2 at −0.85 V. Furthermore, ZnFeSP/NC also exhibits excellent long-term operation stability, effectively avoiding any ORR performance decay.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xingru Yan,Sai Che,Fan Yang,Zhusong Xu,Hongchen Liu,Chenxuan Li,Lu Yan,Na Ta,Siyuan Sun,Qiang Wei,Lei Fang,Yongfeng Li
A non-noble-metal hybrid catalyst (Ni2P/NPC-P), composed of N,P-doped porous carbon decorated with surface P-enriched Ni2P nanoparticles, is developed to address the urgent challenges associated with mass production of clean hydrogen fuel. The synthesis features one-pot pyrolysis of inexpensive fluid catalytic cracking slurry, graphitic carbon nitride, and inorganic salts, followed by a feasible surface phosphidation process. As a non-noble metal catalyst, Ni2P/NPC-P demonstrates excellent performance in hydrogen evolution reaction in alkaline electrolytes with a low overpotential of 73 mV at a current density of 10 mA cm–2 (η10) and a small Tafel slope of 56 mV dec–1, meanwhile exhibits durability with no significant η10 change after 2000 catalytic cycles. Theoretical calculation reveals that the negatively charged P-enriched surface accelerated the rate-determining transformation and desorption of OH*. In overall water splitting, the electrocatalyst achieves a low η10 of 1.633 V, promising its potential in the cost-effective mass production of hydrogen fuel.
研究领域:
催化
·
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SURFACE ENGINEERING
·
2020
·
IF 2.433
Zhen He,Di Cao,Fangcheng Cao,Shengping Zhang,Yuxin Wang
The effects of heat treatment on the properties of electrodeposited Co–P–TiO2 nanocomposite coatings were systematically investigated. The TiO2 nanoparticles-reinforced Co–P–TiO2 nanocomposites were heat-treated at different temperatures. Thermal analysis was conducted to characterize the structural transitions. The phase constituents and surface morphology of nanocomposites were identified. The mechanical properties including microhardness and wear tests were examined, and the electrochemical behaviour of Co–P–TiO2 was determined. At the increasing heating temperature, the structure of Co–P–TiO2 was gradually changed from amorphous into crystalline, with its surface morphology being smoother. Proper heat treatment can significantly improve the mechanical properties and corrosion resistance of coatings. When Co–P–TiO2 coating was heat-treated at 350°C, a smooth and flat surface morphology was obtained and optimal physicochemical performance among the examined coatings was achieved.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Guanyu Yao,Jun Yu,Hao Wu,Zhongzhou Li,Wenjing Zou,Huichao Zhu,Zhengxing Huang,Hui Huang,Zhenan Tang
Nanosheet-assembled microspheres of tungsten oxide doped with antimony were synthesized via hydrothermal method . Sb doping changed the valency of W, promoted a partial crystal phase transition from orthorhombic to hexagonal, and modified the surface morphology . Further, WO 3 is an n-type semiconductor and is sensitive to gases above 100 °C. The Sb-WO 3 sensors in this work were p-type semiconductors from 25 °C to 65 °C, and exhibited excellent sensitivity, fast response and good recovery properties to NH 3 . At 35 °C, the detection limit of 1 at% Sb-WO 3 for ammonia was 200 ppb, and the sensor shows a good stability and selectivity toward several possible interferent . The substantially improved sensing performance of the Sb-WO 3 sensors at near room temperature could be mainly attributed to the change of the W valency promoted via Sb doping.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）