COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2011
·
IF 2.13
Xin Tian,Zhengping Dong,Yifan Huang,Jiantai Ma
In this work, molecular logic element modified multifunctional silica nanoparticles having high magnetization have been successfully prepared. These multifunctional nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), Elementary analysis, X-ray powder diffraction (XRD) and Vibrating sample magnetometer (VSM). The characterization datum indicated that the organic ligand was successfully grafted on the surface of the magnetic silica nanoparticles . The fluorescent changes of the hybrid material upon the addition of cations (H + , F − and their mixture) is utilized as an INHIBIT logic gate at the molecular level, using the fluorescence intensity signal as output.
研究领域:
纳米医学
·
生物传感器
·
分子诊断
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化学生物学
·
智能材料
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·Vol. 10
·期 6
·108733
·
IF 7.968
Hanhan Huang,Zhaosong Li,Haiyan Wang,Caifeng Xia,Pingke Yan,Qian Zhang,Zilin Meng
Microplastics (MPs) are widely presence in soil, and the uncertain influence of MPs is ineluctable. In this study, the influence of removal efficiency for heavy metals by LDHs with the presence of polyethylene (PE) and polypropylene (PP) is investigated. And the removal efficiency of heavy metals Cu 2+ , Pb 2+ , Zn 2+ , Ni 2+ by LDHs from soil is investigated by contact time, initial concentration, PP/PE contents, pH and coexisting ions. The adsorption capacities of heavy metals with the presence of PP/PE are larger and the effects with high content of PP/PE is more obvious on removal of heavy metals. The isothermal experiment data are well described by the Generalized Langmuir isothermal model, denoting that the adsorption sites on the absorbents are certain, and the sites are inhomogeneous with different adsorption energy. In order to further explore the influence of PP/PE on the removal of heavy metals by LDHs, the interaction between LDHs and PP/PE is analyzed by XRD , FT-IR, Zeta potential and SEM. The sites energy distribution theory is employed to analyze the distribution of accessible adsorption sites and the heterogeneity of sites. The results show that with the presence of PP/PE in soil, LDHs interacts with PP/PE preferentially on account of electrostatic attraction, and the combination of LDHs and PP/PE increases the accessible adsorption sites for the removal of heavy metals and is beneficial to the adsorption process . These findings contribute to understanding environmental behavior of heavy metals with the presence of MPs and guide the application of LDHs in soil.
研究领域:
环境科学
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土壤修复
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纳米材料应用
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环境污染化学
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吸附动力学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 44
·e56156
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IF 2.7
Hao Sun,Qinghua Yang,Detao Kong,Yanrui Li,Yaolong He,NengHui Zhang,Hongjiu Hu
Polyethylene oxide (PEO)-based solid polymer electrolytes are regarded as promising electrolyte materials because of their safety and flexibility. However, low ionic conductivity at ambient temperature and poor mechanical properties have been a hindrance to its development. In this work, we thermally compressed the PEO-based electrolytes and explored the ionic conductivity, mechanical performance, free volume, and thermal properties of the electrolyte under different thermal pre-compressing strains (TPC-strains). The results show that TPC-strain can significantly improve the ionic conductivity, in-plane strength, stiffness, and cell specific capacity as well as the mechanical integrity of solid polymer electrolytes within the battery environment. However, it also results in a reduction in the modulus and stiffness of the SPEs in the through-plane. In particular, applying a TPC-strain of 10%–20% to the SPEs by thermal compressing may be a suitable option, which can increase the ionic conductivity of the through-plane to a factor of 3.4 compared with the uncompressed electrolyte, and increase the in-plane strength by up to 141%, resulting in better mechanical integrity during charging/discharging processes. At the same time, the compression modulus can be maintained at 80% or higher.
研究领域:
材料科学
·
电化学
·
高分子物理
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能源存储
·
固态离子学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 28
·45046
·
IF 1.86
Fenglei Liu,Shuixia Chen,Yanting Gao,Yufang Xie
A solid amine adsorbent was prepared by modifying a porous polystyrene resin (XAD-4) with chloroacetyl chloride through a Friedel–Crafts acylation reaction, followed by aminating with tetraethylenepentamine (TEPA). The adsorption behavior of CO 2 from a simulated flue gas on the solid amine adsorbent was evaluated. Factors that could determine the CO 2 adsorption performance of the adsorbents such as amine species, adsorption temperature, and moisture were investigated. The experimental results showed that the solid amine adsorbent modified with TEPA (XAD-4-TEPA), which had a longer chain, showed an amine efficiency superior to the other two amine species with shorter chains. The CO 2 adsorption capacity decreased obviously as the temperature increased because the reaction between CO 2 and amine groups was an exothermic reaction, and its adsorption amount reached 1.7 mmol/g at 10 °C in dry conditions. The existence of water could significantly increase the CO 2 adsorption amount of the adsorbent by promoting the chemical adsorption of CO 2 on XAD-4-TEPA. The adsorbent kept almost the same adsorption amount after 10 cycles of adsorption–desorption. All of these results indicated that amine-functionalized XAD-4 resin was a promising CO 2 adsorbent. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45046.
研究领域:
环境化学
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高分子材料科学
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气体吸附与分离
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碳捕集技术
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Junjie Zhou,Hao Liu,Yichao Lin,Chen Zhou,Aisheng Huang
A well-shaped Ce (IV)-based metal organic framework (Ce-BDC) is prepared under solvothermal method. The influence of synthesis time, temperature and the amount of acetic acid (HAc) as a modulator is studied to develop a new strategy for the synthesis of well-shaped Ce-based MOF. The relationship between the synthesis parameters and morphology as well as crystallinity of Ce-BDC is investigated by XRD and SEM. Furthermore, the obtained well-shaped Ce-BDC shows a CO 2 uptake capacity of 2.28 mmol g −1 at 0 °C and 1.0 bar. Meanwhile, the breakthrough curve behaviors of Ce-BDC are investigated for a CO 2 /CH 4 and CO 2 /N 2 mixture gas . It is found that the Ce-based MOF adsorbs CO 2 under ambient temperature and pressure, but completely excludes CH 4 and N 2 , suggesting that it is a promising adsorbent for efficient separation of CO 2 from natural gas.
研究领域:
材料科学
·
无机化学
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多孔材料
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气体分离
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环境催化
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 7
·期 6
·5172-5184
·
IF 1.5
Xu Zhu,Qin Liu,Xiaohua Zhu,Chunlan Li,Maotian Xu,Yong Liang
A new approach to synthesize graphene was applied by reduction of graphene oxide using ascorbic acid. Chitosan/graphene modified electrode could be employed for simultaneous determination of dopamine and ascorbic acid. The modified electrode showed excellent electrocatalytic activity towards the oxidation of DA and AA. The calibration curves for DA and AA were obtained in the range of 0.3-1067.5μM and 0.6-1378.1μM, respectively. Detection limits were 0.1μM and 0.01μM for DA and AA, respectively. The present method was applied to the determination of AA and DA in human serum samples and the results were quite promising.
研究领域:
分析化学
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电化学
·
生物传感器
·
纳米材料
·
临床检验
·
神经化学
·
药物分析
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·Vol. 44
·期 17
·21000-21003
·
IF 3.057
Jie Zhang,Zhenxing Yue,Yu Luo,Longtu Li
A cofired trilayer ceramic architecture showing as MgTiO 3 /TiO 2 /MgTiO 3 was designed to realize temperature-stable and ultrahigh- Q microwave dielectrics in the typical MgTiO 3 -TiO 2 system. The effects of TiO 2 content on the microwave dielectric properties of cofired trilayer ceramics were studied. Through the design of cofired trilayer architecture, the chemical reactions between MgTiO 3 and TiO 2 were limited within a narrow region of MgTiO 3 /TiO 2 interfaces (~ 15 µm in width), which could be beneficial for optimizing the microwave dielectric properties. Excellent characteristics of ε r ~ 18.38, Q×f value ~ 169,900 GHz and τ f ~ − 1 ppm/°C were gained for the MgTiO 3 /TiO 2 /MgTiO 3 ceramic architectures stacked with 1.63 vol% TiO 2 . The current work could serve as new strategies to develop high-performance dielectric resonators and multilayers for 5G wireless communication applications.
研究领域:
材料科学
·
无机非金属材料
·
电子陶瓷
·
微波介质材料
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功能陶瓷
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2017
·
IF 4.364
Puhong Wen,Lili Ai,Fenyan Wei,Dengwei Hu,Jingjing Guo,Fangyi Yao,Taotao Liu
The crystalline hexagonal Nb 2 O 5 (H-Nb 2 O 5 ) nanobelt clusters dominantly exposed (− 110) facet are firstly synthesized by a hydrothermal topological reaction with a precursor of fiber-like K 2 Nb 2 O 6 ·H 2 O. The structure and morphology of samples obtained at different temperatures and times are investigated. There are two steps in the synthesis process. One is the acid-exchanging reaction transforming into amorphous phase protonated niobate (HNO), and the other is dehydration reaction transforming into H-Nb 2 O 5 , and simultaneous dissolution reaction which forms nanobelt cluster morphology from the fiber-like particle. The formation mechanism of H-Nb 2 O 5 nanobelt clusters has been proposed in detail. After photo-reduced reaction between the H-Nb 2 O 5 nanobelt clusters and AgNO 3 solution, the dominantly exposed (− 110) facet of H-Nb 2 O 5 nanobelt is homogeneously covered by Ag nanoparticles . The photo-electrochemical performance of the obtained H-Nb 2 O 5 nanobelt clusters and Ag deposited H-Nb 2 O 5 (Ag-Nb 2 O 5 ) nanobelt clusters as photocatalysts are evaluated by splitting water under simulated sunlight illumination, and the generated photocurrent of Ag-Nb 2 O 5 sample is 10.73 μA, which is 535 times that of the H-Nb 2 O 5 sample. The results demonstrate that the Ag-Nb 2 O 5 nanobelt clusters have a high photo-electrochemical performance as well as good sunlight photoelectric conversion efficiency.
研究领域:
材料科学
·
纳米科技
·
光催化
·
能源化学
·
半导体材料
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电化学
·
太阳能转换
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Yachao Zhang,Yan Gao,Xueli Zhang,Huiming Wang,Tian Xia,Congcong Bian,Shuang Liang,Xiaozhi Tang,Xia Wang
The amplification of the electrochemical signal is crucial to improving the sensing performance of an immunosensor. In this study, a signal amplification strategy based on the co-catalysis of horseradish peroxidase (HRP) and nanoporous gold (NPG) was used to fabricate an electrochemical immunosensor for the determination of Hepatitis B e antigen (HBeAg). For the resulting immunosensor, HRP catalyzed catechol and thus served as a signal label of secondary antibody. NPG with unique properties was selected as a carrier for capture antibody immobilization. Further, NPG had an efficient electrocatalytic activity towards catechol (the substrate of HRP), which thus significantly enhanced the electrochemical signal produced by the HRP-labeled secondary antibody. Based on the co-catalysis of HRP and NPG, the immunosensor exhibited a good linear relationship between peak current density and HBeAg concentration in a wide HBeAg detection range from 1 pg mL −1 to 1 ng mL −1 with a high sensitivity of 23.51 μA mL ng −1 cm −2 as well as a low detection limit of 0.064 pg mL −1 (S/N = 3). Additionally, the immunosensor presented a strong anti-interference capability against human serum, human serum/dopamine, human serum/tryptophan, human serum/NO 2 − , human serum/D-glucose, and human serum/IgG. For the detection of HBeAg in human serum, the concentrations detected by the immunosensor were in good agreement with the standard concentrations that added in the human serum samples. These unique properties potentially make the proposed immunosensor a good choice for HBeAg detection.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
DRUG DELIVERY
·
2019
·
IF 3.829
Wenguang Gu,Tao Zhang,Junsheng Gao,Yi Wang,Dejian Li,Ziwen Zhao,Bo Jiang,Zhiwei Dong,Hui Liu
Protein-based nanocarriers with inherent biocompatibility have been widely served as building blocks to construct versatile therapeutic nanoplatforms. Herein, bovine serum albumin-iridium oxide nanoparticles (denoted BSA-IrO2 NPs) are successfully synthesized via one-step biomineralization approach. The BSA-IrO2 NPs exhibits uniform size (40 nm), superb biocompatibility and high drug loading capacity for doxorubicin (27.4 wt%). Under near-infrared (NIR) laser irradiation, the as-prepared BSA-IrO2 NPs exhibited high photothermal conversion ability (54.3%) and good photostability. The in vitro drug release experiments displayed pH and NIR laser -triggered DOX release profiles, which could enhance the therapeutic anticancer effect. By utilizing this DOX loaded nanoplatform, effective synergistic chemo-photothermal therapy against human osteosarcoma can be realized, which has been systematically verified both in vitro and in vivo. Notably, in vivo pharmacokinetics studies showed that BSA-IrO2@DOX had prolonged blood circulation time due to the BSA component can improve the stealthiness of the nanoparticles during the blood circulation. Meanwhile, in vitro and in vivo toxicity studies demonstrated that the BSA-IrO2 NPs can act as biocompatible agents for drug delivery and cancer therapy. Therefore, this work presents a biomineralized iridium-based NPs with remarkable features and be used as a very potential therapeutic nanoplatform for cancer treatment.
研究领域:
生物医学工程
·
肿瘤学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOLIA MICROBIOLOGICA
·
2015
·Vol. 61
·期 3
·249-253
·
IF 1
Hu Ruixue,Du Na,Chen Nan,Lin Li,Zhai Yanhua,Gu Zemao
The mechanisms of resistance to levofloxacin for Aeromonas hydrophila isolated from diseased fish and selected in vitro were examined in this study. Levofloxacin-resistant mutants were obtained by selection of A. hydrophila in vitro. The quinolone resistance-determining regions (QRDRs) of the gyrA and parC genes were sequenced in Lev R strains and reverse mutation strains. All Lev R strains carried a point mutation at codon 83 (Ser → Ile), and one strain (25 %) harbored a mutation at position 92 (Leu → Met) in the GyrA-QRDR. After being transferred in a levofloxacin-free medium, one strain of the mutants was successfully reversed and the reversion was related with mutations o f GyrA-QRDR at positions 81 (Gly → Asp) and 83 (Ile → Ser). No amino acid alteration was found in the ParC-QRDR. In addition, the minimum inhibitory concentration (MIC) of levofloxacin for the mutants was lower in the presence of reserpine, and all mutants were also resistant to some of the other quinolones. It was found that the mechanism of levofloxacin resistance of A. hydrophila selected in vitro was related to gyrA of type II topoisomerase, and an efflux mechanism was involved in the resistance as well.
研究领域:
微生物学
·
分子生物学
·
药理学
·
水产病害防治
·
抗菌药物耐药性
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 38
·22064-22071
·
IF 12.732
Wenda Zhang,Jie Feng,Fengqi Lu,Alberto J. Fernández-Carrión,Hui Fu,Xiaojun Kuang
Na-doped melilite-type silicate Sr2MgSi2O7 was reported to display high oxide ion conductivity. In this work, through multiple complementary techniques including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, solid-state 29Si and 23Na nuclear magnetic resonance spectroscopy, and DFT calculations of defect formation energies, we found that it is hard to replace Sr with Na in Sr2MgSi2O7, and the Sr2−xNaxMgSi2O7−0.5x compositions formed mixed crystalline Sr2MgSi2O7 and Na-containing glassy phases. AC impedance spectroscopy measurements indicated that the ionic conduction in Sr2−xNaxMgSi2O7−0.5x could be from Na+ ions in the glassy phase, instead of the oxide ions.
研究领域:
材料科学
·
固体离子导体
·
无机非金属材料
·
能源材料
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）