SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Hang Ao,Hui Feng,Keqing Li,Meizhi Zhao,Zhaosheng Qian,Jianrong Chen
Luminescent materials with aggregation-induced emission (AIE) have been widely used in chemosensors and biosensors based on signal change induced by physical aggregation of AIEgens. In this work, a novel coordinate bonding-induced emission (BIE) phenomenon of gold-glutathione complex was proposed and identified, and this specific coordinate BIE was further utilized to develop signal-enhanced methods for quantification of aluminum species including aluminum cation and polyoxocation AlO 4 Al 12 (OH) 24 (H 2 O) 12 7+ . Gold-glutathione (Au-GSH) complex has shown significant aggregation-induced emission characteristic, and it can sensitively respond to multiple external stimuli such as solvent polarity and pH via an emission-enhancing fashion. It is found that the introduction of aluminum cation to Au-GSH complex is able to more greatly enhance the luminescence through a coordinate bonding-induced emission process, and this BIE behavior is attributed to strong force induced by coordination reaction between glutathione ligands and aluminum cation. In comparison with AIE process, coordinate BIE process was shown to be a more efficient way to enhance the emission. This BIE property of Au-GSH complex was employed to measure aluminum cation and polyoxocation Al 13 with good selectivity. This work provides a new coordinate bonding-induced emission phenomenon, and gives a demonstration of designing chemosensors for metal cations based on coordinate BIE process.
研究领域:
分析化学
·
材料科学
·
环境化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Bing Xue,Mei Yu,Jianjun Liu,Jianhua Liu,Songmei Li,Liangliang Xiong
Graphene oxide (GO) was introduced into sol-gel systems to enhance the corrosion protective properties of the obtained film on AA2024-T3 aluminum alloy . The characterization of morphology, microstructure and component of the films indicated that GO covalently reacted with silanol groups from hydrolyzed 3-glycidoxypropyl-trimethoxysilane (GPTMS) monomer , forming silane functionalized GO (SGO) by C O Si covalent bonds . Corrosion protective properties of the films were evaluated through electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and immersion tests studies. The results showed that the addition of GO improved the corrosion protective properties of sol-gel film distinctly by providing the good barrier property of layered GO and enhancing the cross-linking density of the film. The significant improvement of GO on sol-gel film mainly focused on the resistance and capacitance of film itself. The optimal concentration of GO addition was 0.5 mg mL −1 , at which the film was uniform and showed good corrosion protective properties in 0.05 M NaCl aqueous solution. The corrosion current density of the sol-gel film with 0.5 mg mL −1 GO was one order magnitude smaller than that of sol-gel film without GO. The protection efficiency of the film was up to 99.45%.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Wenqiang Hu,Wenbin Fu,Samik Jhulki,Liang Chen,Aashray Narla,Zhijian Sun,Fujia Wang,Alexandre Magasinski,Gleb Yushin
Poor heat/flame-resistance of polyolefin (e.g., polyethylene and polypropylene) separators and high flammability of organic electrolytes used in today's lithium-ion batteries (LIBs) may trigger rare yet potentially catastrophic safety issues. Here, we mitigate this challenge by developing a heat-resistant and flame-retardant porous composite membrane composed of polyetherimide (PEI) and Al 2 O 3 nanowires (NWs). The membranes are fabricated based on an industrially scalable non-solvent-induced phase separation process, which results in an intimately interconnected porous network of Al 2 O 3 NWs and PEI . The produced composite membranes exhibit excellent flexibility, thermal stability, and flame-retardancy. Importantly, the composite membranes exhibit minimal thermal shrinkage and superior tensile strength (16 MPa) at temperatures as high as 200 °C, significantly exceeding the performance of conventional polyolefin separators. Compared with commercial separators, their superior wettability and higher ionic conductivity (by up to 2.4 times) when filled with the same electrolyte, larger electrolyte uptake (∼190 wt.%), as well as improved cycle and rate performance demonstrated in LiNiMnCoO 2 (NCM)-based LIBs make them attractive choices for a variety of electrochemical energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子科学
·
纳米技术
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2022
·
IF 7.72
Tianquan Liang,Zhihua Huang,Menghao Li,Wantong Xiao,Huan He,Aoping He,Xiyong Chen,Nengneng Luo
The thermochemical reaction behaviors between Y 2 O 3 and calcium-magnesium-aluminosilicate (CMAS) at 1250 °C∼1400 °C were investigated. A continuous-dense reaction layer mainly composed of Y-apatite phase quickly forms within 15 min, and its slow increasing thickness depends on the molten CMAS infiltration along the Y-apatite grain boundaries, the dissolution of the Y-apatite phase into the melt, the inhibiting effect on the CMAS penetration, and the reaction time and temperature. The CMAS crystallization occurs due to the change of chemical composition and the formation of other reaction products. The dense reaction layer shows good resistance to the molten CMAS infiltration.
研究领域:
材料科学
·
无机非金属材料
·
高温材料
·
陶瓷涂层
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
JinFeng Ou,Wenbin Luo,Jian Li,Yi Yu,Zhen Zhang,Zisheng Chao,WenJun Yi,JinCheng Fan
This paper designed and successfully prepared a novel sandwich-like structure CuS@GO as a cathode material of aluminum batteries (ABs). Graphene oxide (GO) nanosheets sandwich CuS nanotubes (NTs) in the middle, and the interconnected carbon layers form a 3D conductive network to connect all CuS NTs. This nanotubular structure is conducive to the infiltration of electrolytes, provides more active sites, and promotes a rapid charge transfer. The one-dimensional hollow tubular structure of CuS and the sandwich-like structure composed of GO can buffer the volume changes generated during cycling, increase mechanical stress, and enhance the structural stability of the material. The synergistic effect of the unique microstructure composed of CuS NTs and GO leads to an enhanced electrochemical performance. At a current density of 0.2A g–1, CuS@GO maintains a specific capacity of nearly 96.85 mAh g–1 and Coulombic efficiency (CE) of nearly 100% after 200 cycles. The electrochemical reaction mechanism of CuS@GO as a cathode material for ABs was also investigated.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2016
·Vol. 31
·期 23
·3757-3765
·
IF 1.579
Caiju Li,Xiaoqing Liu,Jianhong Yi,Long Teng,Rui Bao,Jun Tan,Chao Yang,Zhou Zou
By using high purity aluminum powders and multi-walled carbon nanotubes (MWCNTs) as raw materials, MWCNTs/Al composites were fabricated with ball milling, followed by cold pressing, vacuum sintering, and hot extrusion. It was found that when the sintering temperature was 863 K, MWCNTs/Al composite sintered for 4 h showed good comprehensive properties, and its tensile strength and elongation reached to 156 MPa and 21%, respectively. The comprehensive mechanical properties of the composites became better with raising sintering temperature when the sintering time was 4 h. When the sintering temperature raised to 923 K, the tensile strength of the composite reached to 167 MPa which is three times more than that of annealed high purity aluminum, mainly due to the higher density and better interface bonding resulted from higher sintering temperature. CNTs' pulling out were observed obviously in the fractured surfaces, and load transfer may be the main strengthening mechanism.
研究领域:
材料科学
·
金属基复合材料
·
粉末冶金
·
界面工程
·
力学性能表征
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Xueyan Chen,Min Chen,Guangzhi He,Fei Wang,Guangyan Xu,Yaobin Li,Changbin Zhang,Hong He
Ag-based catalysts are efficient materials for formaldehyde (HCHO) oxidation in the low-temperature range. It has been reported that K addition can increase the catalytic performance of Ag-based catalysts, whereas the specific role of K doping remains ambiguous. In this work, Ag/Al2O3 and K–Ag/Al2O3 catalysts with different K doping levels were prepared and subsequently tested for catalytic HCHO oxidation. It was observed that K doping has a dramatic promotion effect on the activity of the Ag/Al2O3 catalyst. The 2K–Ag/Al2O3 sample was the most active catalyst, over which HCHO could be completely converted into CO2 and H2O in a gas hourly space velocity of 100 000 mL/(gcat h) at 65 °C. The catalysts were next characterized by X-ray powder diffraction, Brunauer–Emmett–Teller, transmission electron microscopy, H2-temperature-programmed reduction, UV–vis, X-ray absorption fine structure, and in situ diffuse reflectance infrared Fourier transform spectroscopy methods. The characterization results show that addition of K species increased the content of metallic Ag species in Ag/Al2O3 catalysts and promoted the adsorption and activation of oxygen species, whereas excessive doping with K+ resulted in the agglomeration of Ag particles and loss of some metallic sites. Therefore, the 2K–Ag/Al2O3 catalyst demonstrated the best performance among the series of K-doped catalysts. Promotion of O2 activation by K doping, rather than enhanced Ag dispersion or surface OH activation or exposure of more Ag(111) facets, was found to be the key factor in the improved catalytic performance of K–Ag/Al2O3 catalysts.
研究领域:
环境催化
·
材料化学
·
大气污染控制
·
纳米催化
·
表面科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Jingjing Liu,Jinlong Yang,Jiyuan Zhang,Haiyang Chen,Shaojun Kang
Porous materials with wrinkled surfaces could have broad applications in catalysis and adsorption. However, designing cellular ceramics with similar structures is challenging. Herein, we demonstrated the binary colloidal self-assembly of γ-Al 2 O 3 nanoparticle/silica gelation network for constructing such materials. The competitive effect between volume shrinkage and surface bend during water evaporation of silica gel contributed to wrinkled aperture surface. During calcination , silica nanoparticles were highly active to react with alumina to form mullite nanocrystals , bringing about high compressive strength at low relative densities. After calcining at 1350 °C, resultant products with hierarchical structure exhibited an outstanding compressive strength of 4.2 MPa, a relatively high surface area of 7.23 m 2 /g at a porosity level of 83.3%. The current strategy provides a feasible and affordable approach for producing high performance ceramic foams towards practical application fields in catalysis and adsorption.
研究领域:
材料科学
·
无机非金属材料
·
纳米材料
·
功能陶瓷
·
胶体与界面化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hanwei Zhang,Xuri Wang,Ahmad Naveed,Tianyi Zeng,Xiaoyun Zhang,Hancheng Shi,Mingru Su,Aichun Dou,Yu Zhou,Yunjian Liu
Nickel-rich cathode materials are widely used for electronic devices because of their high capacity and rate performance. However, structural deterioration after long-term cycling leads to a significant decline in capacity and cycle life. In this work, the effects of three different cations doping on the structural stability and electrochemical performance of Ni-rich cathode materials were investigated. XRD characterization reveals that doped cation leads to broadening of the distance between Li layers and inhibiting Li + /Ni 2+ mixing arrangement. Compared with Na + and K + , the high valence Mg 2+ provides a stronger Mg-O bond, which can effectively restrain the undesired phase transition and sustain the ordered structure. Electrochemical tests demonstrate that NCA with Mg doping has better cycle stability and rate performance than Na and K. The capacity retention rate of NCA with 1% Mg doping is 87.7% after 200 cycles at 1C, and it can still provide a specific capacity of 146.8 mAh g −1 at a high rate of 5C.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Chen Zhang,Mingjun Chen,Xiaohui Zhao,Wenming Zhang,Zhanyu Li
With its consistent thermal runaway temperature and superior capacity, aluminum ion batteries have emerged as a key area for battery development. At the moment, electrode material is the main focus of aluminum ion battery capacity enhancement. Selenide is anticipated to develop into a high-performance cathode for aluminum ion batteries, since it is a type of high energy density electrode material. However, because selenide is soluble in acid electrolytes, Al-Se batteries have low cycle performance and cannot keep up with the present demand for electronic gadgets. Here, homogeneous-structured precursors were created via a hydrothermal reaction , and MnSe 2 –MnSe heterojunction hollow spheres were created a step further via temperature control of the selenidation reaction. With 103.76 mAh/g of specific capacity remaining after 3000 cycles at 1.0 A/g, this novel heterojunction material exhibits astounding cycle stability. After additional investigation, it was shown that the MnSe 2 –MnSe heterojunction may prevent the dispersion of the active substances, significantly enhancing the cycle performance. The density of states (DOS) of electrode materials demonstrates the superior electronic conductivity of this heterojunction material. Meanwhile, it was computationally demonstrated that the MnSe 2 –MnSe heterojunction has a strong adsorption energy for AlCl 4 − , thus accelerating the reaction kinetics. In summary, the performance of selenides has been improved by this novel heterojunction material, which also makes for a superior cathode material .
研究领域:
电化学
·
材料科学
·
能源存储
·
纳米材料
·
固态化学
·
电极材料
✓ 已验证
DOI
高影响因子
SURFACE ENGINEERING
·
2025
·
IF 2.6
Xiaobing Li,Ruijie Lu,Zhenping Wu,Jianfeng Chen
In this study, a multi-step synergistic process combining chemical etching, hydrothermal deposition and stearic acid modification was proposed for the corrosion protection needs of aluminium alloys in marine environments, and micro- and nano-composite superhydrophobic coatings (STZ) were successfully constructed on the surface of aluminium bases. Scanning electron microscopy, EDS, and XRD confirmed the presence of zinc oxide particles with micron-level rough structures on the coating surface. Contact angle testing showed a static contact angle of up to 156° and a rolling angle of less than 5°, which is consistent with superhydrophobic properties. Electrochemical tests showed that the corrosion current density of the STZ coating was three orders of magnitude lower than that of the untreated substrate, and the charge transfer resistance was significantly higher, confirming a significant increase in corrosion resistance. After 400 linear abrasion cycles, the coating retained 70% of its hydrophobic properties. In self-cleaning tests, the rate of contaminant adhesion was reduced by 75% compared to the untreated substrate.This process provides a feasible solution for the long-term protection of aluminium alloys in harsh environments.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
·
纳米材料
·
功能涂层
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2020
·
IF 4.652
Jianlong Chai,Yabin Zhu,Zhiguang Wang,Tielong Shen,Yiwen Liu,Lijuan Niu,Shufen Li,Cunfeng Yao,Minghuan Cui,Chao Liu
Al 2 O 3 –ZrO 2 (3Y)–SiC ceramic composites were prepared by spark plasma sintering in vacuum under 40 MPa of uniaxial compression between 1300 °C and 1400 °C. The effect of nano-size SiC and sintering temperature on the microstructure and mechanical properties of ceramic composites were investigated. The results showed that SiC particles was uniformly distributed in the composite, mainly within the matrix grains. Sintering temperature and SiC particles caused the shape of alumina grains to be columnar. The flexural strength of 22.3 vol% Al 2 O 3 -57.7 vol% ZrO 2 -20 vol% SiC sintered at 1350 °C composites was 1081 MPa, fracture toughness was 15.18 MPa m 1/2 and hardness was 16.42 GPa. The addition of SiC particles leads to grain boundary strengthening, and the change of fracture mode and cracks deflection and bridging are considered to be the main reasons for the increase in material fracture toughness.
研究领域:
材料科学
·
陶瓷学
·
复合材料
·
固态物理
·
结构材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）