International Journal of Electrochemical Science
·
2023
·
IF 1.5
Jun Ma,Zhou Yufeng,Jing Xu,Lin Gu,Guoqiao Lai,Bin Chen,Shuan Liu,Haichao Zhao,Haibin Yu,Jianmin Chen
Photopolymerization of urethane acrylate (PUA) containing solution-processable dibutyl-substituted poly(3,4-propylenedioxythiophene) (Poly(ProDotBu2)) was applied on Q235 carbon steel. The corrosion resistance of as-prepared composite coatings with various contents of Poly(ProDotBu2) was studied by electrochemical techniques including open-circuit potential (OCP), potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). It was observed that the PUA/Poly(ProDotBu2) composite coatings exhibited an excellent corrosion resistance and barrier properties in comparison with pure PUA coating.
✓ 已验证
DOI
高影响因子
CHINESE PHYSICS LETTERS
·
2021
·Vol. 38
·期 6
·068201
·
IF 1.483
Jiachao Yang,Jian Zou,Chun Luo,Qiwen Ran,Xin Wang,Pengyu Chen,Chuan Hu,Xiaobin Niu,Haining Ji,Liping Wang
FeSO4 has the characteristics of low cost and theoretical high energy density (799 W⋅h⋅kg−1 with a two-electron reaction), which can meet the demand for next-generation lithium-ion batteries. Herein, FeSO4 as a novel high-performance conversion-reaction type cathode is investigated. We use dopamine as a carbon coating source to increase its electronic conductivity. FeSO4@C demonstrates a high reversible specific capacity (512 mA⋅h⋅g−1) and a superior cycling performance (482 mA⋅h⋅g−1 after 250 cycles). In addition, we further study its reaction mechanism. The FeSO4 is converted to Fe and Li2SO4 during lithium ion insertion and the Fe|Li2SO4 grain boundaries further store additional lithium ions. Our findings are valuable in exploring other new conversion-type lithium ion battery cathodes.
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2021
·
IF 8.271
Juan Xiao,Junwei Chen,Zuqiao Ou,Junhang Lai,Tongwen Yu,Yi Wang
Herein, the application of a N-doped graphitic-carbon-coated iron nitride composite dispersed in a N-doped carbon framework (Fe 3 N@NG/NC) is investigated as a heterogeneous electro-Fenton (HE-EF) catalyst for the efficient removal of organics. The simultaneous carbonization and ammonia etching of iron-based metal organic framework (Fe-MOF) materials yielded well-dispersed N-doped carbon-coated Fe 3 N nanoparticles with a diameter of ~70 nm. The Fe 3 N and pyridinic N endowed the composite with high HE-EF activity for decomposing the electrogenerated H 2 O 2 to • OH. The Fe 3 N@NG/NC exhibited outstanding HE-EF performance in removing various organic pollutants with low iron leaching. A removal rate of 97–100% could be obtained for rhodamine B (RhB), dimethyl phthalate , methylene blue , and orange II in 120 min at a pH of 5.0. When the solution pH was set to 3.0, 5.0, 7.0, and 9.0, the removal rate of RhB reached 100%, 96%, 92%, and 81%, respectively, in 60 min at an optimum voltage of 0.0 V ( vs. reversible hydrogen electrode (RHE)). Moreover, the concentration of leached iron was expected to be below 0.03 mg/L in a wide pH range of 3.0–9.0. In addition, the RhB removal efficiency remained as high as 90% after six cycles in the reusability experiments. This work highlights the MOF-derived Fe 3 N composite as an efficient HE-EF catalyst and the corresponding catalytic mechanism, which facilitates its application in wastewater treatment .
✓ 已验证
DOI
高影响因子
CHINESE PHYSICS LETTERS
·
2017
·Vol. 34
·期 6
·068103
·
IF 0.8
Wen-Rong Xie,Bin Liu,Tao Tao,Guo-Gang Zhang,Bao-Hua Zhang,Zi-Li Xie,Peng Chen,Dun-Jun Chen,Rong Zhang
A sequential deposition method is developed, where the hybrid organic–inorganic halide perovskite (CH3NH3Pb (I1−xBrx)3) is synthesized using precursor solutions containing CH3NH3I and PbBr2 with different mole ratios and reaction times. The perovskite achieved here is quite stable in the atmosphere for a relatively long time without noticeable degradation, and the perovskite nanowires are proved to be single crystalline structure, based on transmission electron microscopy. Furthermore, strong red photoluminescence from perovskite is observed in the wavelength range from 746 nm to 770 nm with the increase of the reaction time, on account of the exchanges between I− ions and Br− ions in the perovskite crystal. Lastly, the influences of concentration and reaction time of the precursor solutions are discussed, which are important for evolution of hybrid perovskite from nanocuboid to nanowire and nanosheet.
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2013
·
IF 0
Yi Lu,Xiao-Yu Yang,Bao-Lian Su
Monolayer chemically converted graphene (CCG) nanosheets can be homogeneously self-assembled onto silicon wafer modified by 3-aminopropyl triethoxysilane (APTES) to form very thin graphene film. The CCG film was characterized by FT-IR, XRD , SEM, TEM and AFM. Results show that CCG sheets formed monolayer film after assembled onto silicon wafer and there is a very tight chemical bond between sheets and wafer. Furthermore, the electrical measurements revealed that the monolayer graphene film has an excellent electrical conductivity .
✓ 已验证
DOI
NEW CARBON MATERIALS
·
2017
·
IF 1.02
Li-fang Shi,Jun-zhe Liu,Jun-he Yang,Ling-fei Cai,Li-yun Shi,Han-xun Qiu
Silver microwires (AgMWs) were made amphiphilic by non-covalent functionalization with poly (vinyl pyrrolidone) and hexadecyl mercaptan. The Langmuir-Blodgett (LB) technique was used to transfer graphene oxide (GO) and the functionalized AgMWs (F-AgMWs) onto a quartz substrate to obtain GO-AgMW hybrid films. The films had a high optical transparency and an antibacterial property against Escherichia coli ( E. coli ). It is proposed that the GO layer not only acts as an adhesive layer for AgMWs, but also is acidic, which provides an ideal reaction condition for AgMWs to release the Ag + ions that fight E. coli . The influence of pH value on the antibacterial property of the hybrid films was investigated in order to verify the proposed mechanism. Further development of this method may provide a way to produce next generation transparent multifunctional thin films with antibacterial properties.
✓ 已验证
DOI
高影响因子
Chinese Journal of Natural Medicines
·
2016
·Vol. 14
·期 3
·227-231
·
IF 1.382
Jie-Hong LI,Jie-Tao PAN,Yong-Qin YIN
In the present study, two new compounds from Ipomoea cairica were identified and demonstrated to have α-glucosidase inhibitory activity. They were isolated by column chromatography on silica gel and sephadex LH-20 and finally purified by prep-HPLC, with their structures being elucidated by spectroscopic methods, such as 1D- and 2D-NMR and HR-TOF-MS, and chemical methods. Compounds 1 and 2 , named cairicoside A and cairicoside B, were evaluated for α-glucosidase inhibitory activity by the MTT method, with the IC 50 values being 25.3 ± 1.6 and 28.5 ± 3.3 μmol·L −1 , respectively.
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yi-Hui You,Chang-Dong Gu,Xiu-Li Wang,Jiang-Ping Tu
Electrodeposition process of Ni–polytetrafluoroethylene (PTFE) composite coatings is limited to use aqueous plating bath where nonionic/cationic wetting agents usually are necessary to prohibit the hydrophobic PTFE particles being coagulated. This study proposes a novel electrolyte for the depositing Ni–PTFE composite coatings which is formed in a deep eutectic solvent (DES). The DES with a non-aqueous nature allows the PTFE particles well be dispersed in the electrolyte without the additive of any wetting agents. The Ni–PTFE composite coatings are successfully electrodeposited from the proposed DES-based plating bath which is confirmed by the scanning electron microscope and X-ray energy dispersive spectroscope. Deposition mechanism, microstructure, and properties of the composite coatings are investigated. Importantly, it is found that the Ni–3.1wt.% PTFE composite coating shows a hydrophobic behavior with a contact angle of about 121±1° and an enhanced wear resistance than the pure Ni coating due to the incorporation of PTFE.
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Rushuo Li,Tao Ban,Danfeng Zhao,Fajie Hu,Jing Lin,Xiubing Huang,Zhiping Tao,Ge Wang
Defect engineering improves the catalytic performance of metal-organic frameworks (MOFs) loaded metal nanoparticles (MNPs@MOFs), but there is still a challenge in defining the structure-activity relationships. Herein, the content of linker-missing defects in UiO-66(Ce) was systematically regulated via formic acid as the modulators, and defective UiO-66(Ce) loaded Ni nanoparticles (NPs) were constructed for dicyclopentadiene (DCPD) hydrogenation. The fine regulation of defect engineering and reduction conditions affected the structure properties of UiO-66(Ce) and the electronic metal-support interaction between MOFs and Ni NPs, thereby optimizing the microenvironment and electronic state of Ni NPs. The optimized U(Ce)-40eq with suitable defects, small size and structure stability effectively promoted the production of highly dispersed abundant electron-deficient Ni 0 active sites, enhancing the adsorption and activation of H 2 and C=C bonds, especially accelerating the rate-determining step. Therefore, U(Ce)-40eq loaded 5 wt% Ni NPs achieved DCPD saturated hydrogenation to tetrahydrodicyclopentadiene (70 °C, 2 MPa, 90 min), superior to most high-loading Ni-based catalysts. This work reveals the synergistic mechanism of MOFs defect engineering and electronic structure of Ni NPs, providing effective guidance for the precise preparation of highly efficient and stable MNPs@MOFs heterogeneous catalysts.
✓ 已验证
产品关联
DOI
高影响因子
European Physical Journal-Special Topics
·
2025
·
IF 2.3
Xiang Yue,Miao Zhicong,Wu Zhixiong,Liu Huiming,Huang Chuanjun,Yang Zengchao,Li Jiangtao,Huang Rongjin,Li Laifeng
The packaging structure with efficient heat conduction and dissipation is the key to ensuring rapid cooling and heat dissipation for superconducting magnets. However, as the most common encapsulated adhesive, epoxy resin has an extremely low thermal conductivity at low temperatures (< 0.1 W/(m·K) at 77 K), which can no longer meet the demands of future superconducting technology. In this work, a high-thermal-conductivity dielectric epoxy composite was obtained by using binary fillers consisting of α- and β-silicon nitride (Si 3 N 4 ) as a reinforcement. Compared to the unitary filler system, the binary filler system can generate a more efficient thermal conduction pathway inside the composites. The results demonstrated that at a binary filler content of 60 wt%, the Si 3 N 4 -2/EP composite (α-Si 3 N 4 : β-Si 3 N 4 = 2: 8) exhibited a 687.8% increase in thermal conductivity at room temperature (RT) and a 3266% increase at low temperature (77 K) compared to neat epoxy. Over the temperature range of 77–293 K, the Si 3 N 4 -2/EP composite exhibited an average coefficient of thermal expansion (CTE) as low as 14.1 × 10 –6 ·K −1 , which was reduced by 63%. This work provides a promising strategy for obtaining high thermal conductivity encapsulation materials for superconducting magnets.
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2017
·
IF 0.795
Ze-Jie ZHANG,Xi SU,Yi XU,Li CHEN
A multifunctional microfluidic chip integrated with multi-orifice flow fractionation (MOFF) and magnetic capture technique was developed to specifically separate and capture HepG2 cells in artificial samples. The chip contained a glass substrate and a polydimethylsiloxane (PDMS) micro-channel cover plate. The PDMS cover plate consisted of three 10-mm-long injection channels, a MOFF separation zone and a hexagonal cavity cell enrichment detection zone. The MOFF separation zone, with a total length of 20 mm, was consisted of 80 semi-rhombic shrinkage and expansion units with a length of 0.18 mm, a depth of 50 μm, a shrinkage area width of 0.06 mm, and an expansion area of 0.20 mm. The angle between each group of shrinkage and expansion units was 103.0°. In this work, HepG2-blood cell suspension was used as the sample. Based on the principle that the magnetic beads surface modified c-Met antibody could specifically bind to HepG2 cells, an immune-magnetic beads (anti-MNCs) suspension at a concentration of 50 μg mL −1 was prepared by surface carboxylated beads, EDC (1 mg mL −1 ), NHS (1 mg mL −1 ) and c-Met antibody. At the optimized flow rate of 50 μL min −1 , HepG2 in suspension samples was efficiently captured at the detection zone of chip via a magnetic field. The carbon quantum dots were prepared by microwave heating with citric acid and thiourea to label HepG2 cells which made it possible that the captured HepG2 could be visualized in-situ. The captured cells in the chip detection area were counted by microscope. It was shown that the capture rate of HepG2 cells was 88.5% ± 6.7% (500 μL volume contained 10 6 blood cells and 10 HepG2 cells). The results demonstrated the developed multifunctional microfluidic chip may serve as a promising tool for separation and capture of tumour cells.
✓ 已验证
DOI
高影响因子
Biomedical Materials
·
2010
·Vol. 5
·期 6
·065016
·
IF 1.963
Deming Xie,Huamei Huang,Keith Blackwood,Sheila MacNeil
Both chitosan and polylactide/polyglycolide have good biocompatibility and can be used to produce tissue engineering scaffolds for cultured cells. However the synthetic scaffolds lack groups that would facilitate their modification, whereas chitosan has extensive active amide and hydroxyl groups which would allow it to be subsequently modified for the attachment of peptides, proteins and drugs. Also chitosan is very hydrophilic, whereas PLGA is relatively hydrophobic. Accordingly there are many situations where it would be ideal to have a copolymer of both, especially one that could be electrospun to provide a versatile range of scaffolds for tissue engineering. Our aim was to develop a novel route of chitosan-g-PLGA preparation and evaluate the copolymers in terms of their chemical characterization, their performance on electrospinning and their ability to support the culture of fibroblasts as an initial biological evaluation of these scaffolds. Chitosan was first modified with trimethylsilyl chloride, and catalyzed by dimethylamino pyridine. PLGA-grafted chitosan copolymers were prepared by reaction with end-carboxyl PLGA (PLGA–COOH). FT-IR and1H-NMR characterized the copolymer molecular structure as being substantially different to that of the chitosan or PLGA on their own. Elemental analysis showed an average 18 pyranose unit intervals when PLGA–COOH was grafted into the chitosan molecular chain. Differential scanning calorimetry results showed that the copolymers had different thermal properties from PLGA and chitosan respectively. Contact angle measurements demonstrated that copolymers became more hydrophilic than PLGA. The chitosan-g-PLGA copolymers were electrospun to produce either nano- or microfibers as desired. A 3D fibrous scaffold of the copolymers gave good fibroblast adhesion and proliferation which did not differ significantly from the performance of the cells on the chitosan or PLGA electrospun scaffolds. In summary this work presents a methodology for making a hybrid material of natural and synthetic polymers which can be electrospun and reacts well as a substrate for cell culture.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）