INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2021
·
IF 3.871
Zhaoran Chen,Dejiang Ma,Shanmin Wang,Pinwen Zhu,Qiang Tao,Baochang Liu
Ti-coated diamond and cBN with TiCN as the binder were used to fabricate the TDBN-TiCN series PDC with improved heat resistance, wear resistance and impact toughness by a China-type cubic high-pressure apparatus (5.5–6.5 GPa, 1450–1650 °C) for drilling. Under high temperature and high pressure conditions, the Co in the cemented carbide substrate penetrated into the PCD layer and the binder TiCN to form a metal-ceramic binder system. It can promote the formation of polycrystalline cubic boron nitride (PcBN) from cubic boron nitride particles at the grain boundaries, and promote the TDBN-TiCN series PDC to have the performance of PCD and PcBN. Compared with the TDBN series PDC developed by our former research, the wear resistance of TDBN-TiCN series PDC increased by 17% and the impact toughness increased by 26%. In the TDBN-TiCN series PDC, some heat resistant phases, such as PcBN, TiB 2 and TiN, were formed so as to enhance the initial graphitization and oxidizing temperatures to 958 °C, which was 8 °C higher than the TDBN series PDC (950 °C) and 178 °C higher than conventional PDC (780 °C).
研究领域:
材料科学
·
地质工程
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DOI
高影响因子
Friction
·
2020
·Vol. 9
·期 1
·104-118
·
IF 5.29
Huang Zhiping,Zhao Wenjie,Zhao Wenchao,Ci Xiaojing,Li Wentao
A series of high solid content (30 wt%) epoxy resin (EP) composite coatings reinforced with differently sized cubic boron nitride (CBN) particles were fabricated successfully on 304L stainless steel. Polydopamine (PDA) was used to improve the dispersibility of CBN particles in EP. The structural and morphological features of the CBN particles and the composite coatings were characterized by Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Moreover, a UMT-3 tribometer and surface profiler were used to investigate the tribological behaviors of the as-prepared composite coatings. Electrochemical impedance spectroscopy (EIS) and Tafel analysis were used to investigate the coatings’ anti-corrosion performance. The results demonstrated that the CBN fillers could effectively enhance the tribological and anti-corrosion properties of the EP composite coatings. In addition, when the additive proportion of the microsized (5 μm) and nanosized (550 nm) CBN particles was 1:1, the tribological property of the EP composite coatings was optimal for dry sliding, which was attributed to the load carrying capability of the microsized CBN particles and the toughening effect of the nanosized CBN particles. However, when the additive proportion of the microsized and nanosized CBN particles was 2:1, the tribology and corrosion resistance performance were optimal in seawater conditions. We ascribed this to the load-carrying capacity of the microparticles, which played a more important role under the seawater lubrication condition, and the more compact structure, which improved the electrolyte barrier ability for the composite coatings.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Haiwen Gao,Yang Wang,Honglong Shen,Zongdeng Wu,Juanjuan Song,Jia Yu,Cai Liu,Haiyan Jing,Peng Zhao,Wu Lei,Qingli Hao
From the perspective of nano science and nanotechnology, it is very interesting and important to develop a reasonable and practical synthesis route of nanomaterials for production and life. Here, we develop a strategy of hollow cubic metal oxide nanocages. The method was inspired by Pearson’s Hard-Soft-Acid-Base (HSAB) theory, and nanocages with excellent performance were prepared by coordination etching and optimization of reaction conditions. Firstly, Cu 2 O nanocubes were prepared by redox reaction at room temperature. Then, the hollow cubic NiCo 2 O x /CeO y nanocages were obtained by HSAB theory and cerium doping. The nanomaterial has a specific capacitance of up to 1976 F/g at the current density of 1 A/g. In addition, the asymmetric supercapacitor (ASC) prepared with hollow cubic NiCo 2 O x /CeO y nanocage as cathode and active carbon as anode exhibits an energy density as high as 37.1 Wh kg −1 at the power density of 375 W kg −1 . The capacitance retention rate of the device is 91.5 % after 10,000 cycles. The device can be charged to light up LED lights. These excellent electrochemical properties, due to their unique structure and synergistic effect between materials, indicate the potential application value of hollow cubic NiCo 2 O x /CeO y nanocages in high-performance supercapacitors.
研究领域:
纳米科学
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材料科学
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电化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Feng Xiao,Yang Zhou,Hao Zhang,Yanhui Wu
Fluoride pollution will cause serious harm to the human ecological environment. The capacitive deionization method for fluoride removal has the advantages of low cost, low energy consumption, and convenient operation. Electrode material is crucial for desalination performance. In this study, a novel manganese doped hollow cubic carbon material (MHCC) was prepared by constructing ZIF-8 with hollow cubic morphology as a precursor and carbonizing it with manganese acetate as a manganese source. Then, the derived MHCC material was characterized and tested for capacitive fluoride removal. The adsorption capacity of MHCC10 (the mass ratio of carbon material to manganese acetate tetrahydrate was 10:1) reached 6.2 mg/g and 25.5 mg/g at the initial NaF concentration of 30 mg/L and 150 mg/L respectively. It could maintain 85.5% of the initial capacity after 10 adsorption–desorption cycles. The CDI defluoridation mechanism of MHCC was analyzed. The hollow porous structure inherited from etched ZIF-8 can promote the formation of electric double layers. An appropriate amount of manganese doping has a pseudocapacitive effect, which helps to increase adsorption capacity and improve cycling performance. This work provides a new approach for the design and preparation of novel capacitive fluoride removal electrode materials.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Mingjian Zhou,Shangxian Chen,Boru Wei,Dongpeng Yang,Dekun Ma,Shaoming Huang
Colloidal photonic crystals (PCs) feature face-centered cubic (FCC) lattices since spherical particles are usually used as building blocks; however, constructing structural colors originating from PCs with non-FCC lattices is still a big challenge due to the difficulty in preparing non-spherical particles with tunable morphologies, sizes, uniformity, and surface properties and assembling them into ordered structures. Here, uniform, positively charged, and hollow mesoporous cubic silica particles (hmc-SiO 2 ) with tunable sizes and shell thicknesses prepared by a template approach are used to self-assemble into PCs with rhombohedral lattice. The reflection wavelengths and structural colors of the PCs can be controlled by altering the sizes or the shell thicknesses of the hmc-SiO 2 . Additionally, photoluminescent PCs have been fabricated by taking the advantage of the click chemistry between amino silane and isothiocyanate of a commercial dye. The PC pattern achieved by a hand-writing way with the solution of the photoluminescent hmc-SiO 2 instantly and reversibly shows the structural color under visible light but a different photoluminescent color under UV illumination, which is useful for anticounterfeiting and information encryption. The non-FCC structured and photoluminescent PCs will upgrade the basic understanding of the structural colors and facilitate their applications in optical devices, anti-counterfeiting, and so forth.
研究领域:
材料科学
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光学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 17
·12399-12406
·
IF 2.993
Cheng Zhenzhi,Geng Xinpei,Chen Leyi,Zhang Cheng,Huang Haifu,Tang Shaolong,Du Youwei
A facile two-step method is developed for large-scale synthesis of chemically ordered Pt 3 Co nanoparticles (NPs) as a high-performance catalyst for hydrogen evolution reaction. Due to the NaCl-matrix as dispersing media avoids the severe aggregation during the high-temperature annealing process, the resulting Pt 3 Co NPs are pure and well crystallized with narrow size distribution. Furthermore, the chemically ordered Pt 3 Co NPs exhibit excellent HER property in acidic solution. Our methodology can be also applied to synthesis of other Pt-based NPs.
研究领域:
材料科学
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催化化学
·
纳米技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Chuanqi Feng,Lumin Wang,Dashuai Zhang,Longlong Geng,Lianwen Zhou,Ling Wang,Guanfeng Tian,Qi Tang,Jinyan Hu,Bijiang Geng,Lang Yan
The efficacy of electron-hole separation in a single sonosensitizer and the complexities of the tumor microenvironment (TME) present significant challenges to the effectiveness of sonodynamic therapy (SDT). Designing efficient sonosensitizers to enhance electron-hole separation and alleviate TME resistance is crucial yet challenging. Herein, we introduce a novel Z-scheme heterojunctions (HJs) sonosensitizer using Fe-doped carbon dots (CDs) as auxiliary semiconductors to sensitize cubic Cu 2 O (Fe-CDs@Cu 2 O) for the first time. Fe-CDs@Cu 2 O demonstrated enhanced SDT effects due to improved electron-hole separation. Additionally, the introduction of Fe ions in CDs synergistically enhances Fenton-like reactions with Cu ions in Cu 2 O, resulting in enhanced chemodynamic therapy (CDT) effects. Moreover, Fe-CDs@Cu 2 O exhibited rapid glutathione (GSH) depletion, effectively mitigating TME resistance. With high rates of 1 O 2 and OH generated by Fe-CDs@Cu 2 O, coupled with strong GSH depletion, single drug injection and ultrasound (US) irradiation effectively eliminate tumors. This innovative heterojunction sonosensitizer offers a promising pathway for clinical anti-tumor treatment.
研究领域:
生物医学工程
·
肿瘤治疗学
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产品关联
DOI
PubMed
高影响因子
Journal of the American Chemical Society
·
2025
·
IF 15.6
Qing Yao,Renjie Ren,Yuanmin Zhu,Wei Yan,Zhiyong Yu,Zhongliang Huang,Aiying Song,Haixin Lin,Lin Zhuang,Zhe-Ning Chen,Nanjun Chen,Xiaoqing Huang
The face-centered cubic (fcc) Ru exhibits great potential for the alkaline hydrogen oxidation reaction (HOR), while achieving high HOR activity and CO tolerance poses a formidable challenge for Ru catalysts in practical fuel cells, particularly when using CO-contaminated H2, such as gray and blue hydrogen. Here, we propose a compositional diversification strategy to create 14 types of fcc Ru-based alloys, in which adjustable compositions can tune the nanostructure while offsetting the limitations of single Ru. Among them, quinary RuInPtNiCu nanocrystals (NCs) exhibit an outstanding HOR activity of 5.36 A mgPGM–1, which is 15.9 and 2.9 times higher than those of commercial Pt/C (0.338 A mgPGM–1) and single Ru NCs (1.88 A mgPGM–1), respectively. More importantly, the RuInPtNiCu-based membrane electrode assembly (MEA) achieves a high peak power density of 1.72 W cm–2 and a remarkable mass activity of 19.0 A mgPGM–1@0.65 V in H2–O2, and the RuInPtNiCu-based MEA can be run stably at 0.6 A cm–2 for over 100 h. Moreover, the RuInPtNiCu retains 94.6% of the HOR current after exposure to H2 containing 1000 ppm CO for 8000 s in a rotating disk electrode and retains 92.5% of cell voltage after a CO-toxicity stability test in fuel cells, underscoring its exceptional CO tolerance. Mechanism and computation studies corroborate that the optimized electronic structure and atomic configuration of RuInPtNiCu weaken the adsorption of surface species (*H, *OH, and CO) and alter the CO adsorption mode on active sites, thus leading to enhanced HOR performance and CO tolerance.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Chang Chen,Borui Liu,Qiang Ru,Shaomeng Ma,Bonan An,Xianhua Hou,Shejun Hu
Cubic Spinel MnCo 2 O 4 /graphene sheets (MCO/GS) nanocomposites are synthesized by a facile hydrothermal method with a subsequent annealing process . Nano-sized MnCo 2 O 4 particles are evenly embedded in paper-like graphene sheets , possessing a unique nanoparticles-on-sheets hybrid nanostructure , with particle size around 20–50 nm. Owing to the special nanoparticles-on-sheets structures, MCO/GS nanocomposites have an outstanding electrochemical performance for rechargeable energy storage devices. As an anode material for lithium-ion batteries, MCO/GS electrodes exhibit high reversible discharge capacities (1350.4 mAh g −1 at the initial rate of 100 mA g −1 ), excellent rate capability (462.1 mAh g −1 at a current rate of 4000 mA g −1 ) and outstanding cycling performance (584.3 mAh g −1 at 2000 mA g −1 after 250 cycles). Meanwhile, as an anode material for sodium-ion batteries, MCO/GS electrodes also exhibit comparably promising electrochemical characteristics. Greatly improved electrochemical properties can be assigned to the special advantageous nanostructures. Besides, the existence of graphene sheets is beneficial to the transportation of ions/electrons during battery operation. The outstanding electrochemical performance demonstrates that the lithium/sodium storage capability of MCO/GS nanocomposites is highly promising for high-capacity batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机非金属材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Huaji Pang,Yunhong Jiang,Wensheng Xiao,Yanhuai Ding,Cai Lu,Zhanpeng Liu,Ping Zhang,Hean Luo,Wei Qin
g-C 3 N 4 and CdS have attracted intense attention in the field of energy and environment research. Cubic-phase CdS possesses a smaller bandgap than that of hexagonal CdS but has seldom been used as photocatalytic material. This work focuses on the photocatalytic H 2 generation of few-layer g-C 3 N 4 nanosheets (CNS) anchored with cubic-phase CdS nanocrystals (CNS–CdS). The CNS–CdS composites were synthesized by depositing cubic-phase CdS on the surface of CNS in a sulfur-rich solution. Owing to the large specific surface area, rich active sites and strong synergy between cubic CdS and g-C 3 N 4 nanosheets, the CNS–CdS showed the enhanced light absorption and separation of the photo-generated carriers, which endowed it with superior H 2 generation activity and stability. The optimal average hydrogen production rate of the CNS–CdS photocatalyst reached to 2.24 mmol∙h −1 ·g −1 under irradiation of AM 1.5G, which was 3.5 and 3.3 times of that of cubic CdS and few-layer g-C 3 N 4 nanosheets, respectively. The best apparent quantum efficiency at 475 nm reached up to 13.83%, and the maximum conversion efficiency of incident photon-to-current is 59.6% in the wavelength range of 350–700 nm. The excellent stability of the as-prepared CNS–CdS was also proven by the cyclic run. The results suggest the replacement of hexagonal CdS with cubic CdS result in energy-saving, performance-stable and high-efficient photocatalytic materials.
研究领域:
材料科学
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环境科学
·
能源研究
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 9
·1-13
·
IF 2.02
Tang Huanfeng,Huang Zaiyin,Xiao Ming,Liang Min,Chen Liying,Tan XueCai
The activities, selectivities, and stabilities of nanoparticles in heterogeneous reactions are size-dependent. In order to investigate the influencing laws of particle size and temperature on kinetic parameters in heterogeneous reactions, cubic nano-Cu 2 O particles of four different sizes in the range of 40–120 nm have been controllably synthesized. In situ microcalorimetry has been used to attain thermodynamic data on the reaction of Cu 2 O with aqueous HNO 3 and, combined with thermodynamic principles and kinetic transition-state theory, the relevant reaction kinetic parameters have been evaluated. The size dependences of the kinetic parameters are discussed in terms of the established kinetic model and the experimental results. It was found that the reaction rate constants increased with decreasing particle size. Accordingly, the apparent activation energy, pre-exponential factor, activation enthalpy, activation entropy, and activation Gibbs energy decreased with decreasing particle size. The reaction rate constants and activation Gibbs energies increased with increasing temperature. Moreover, the logarithms of the apparent activation energies, pre-exponential factors, and rate constants were found to be linearly related to the reciprocal of particle size, consistent with the kinetic models. The influence of particle size on these reaction kinetic parameters may be explained as follows: the apparent activation energy is affected by the partial molar enthalpy, the pre-exponential factor is affected by the partial molar entropy, and the reaction rate constant is affected by the partial molar Gibbs energy.
In situ microcalorimetry, combined with theoretical models, was used to investigate the reaction kinetic parameters of cubic nano-Cu 2 O, and those effects of particle size and temperature were discussed systematically.
研究领域:
材料科学
·
化学动力学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 1
·362-372
·
IF 3.925
Jing Shen,Dongxiu Wang,Li Yang,Tongwen Wang,Qianmo Yang,Jun Wang
Bilayered sodium dodecyl sulfate (SDS)/ionic liquids (alkyl imidazolium type ionic liquid Cnmim+, n = 10, 12, 14, and 16) were first employed to modify the surface of Fe3O4 nanoparticles for the formation of stable aqueous ferrofluids. Subsequently, in the synthesized bilayered SDS/C16mim+-stabilized ferrofluid (Fe3O4/SDS/C16mim+), magnetic mesoporous silica with a cubic (Ia3d) mesostructure (Fe3O4@MCM-48) has been synthesized using tetraethylorthosilicate as the silicon source and the long chain C16mim+ as a template again. The research results showed that the combination of SDS and long chain Cnmim+ (such as C16mim+) is superior to that of SDS and short chain Cnmim+ (such as C10mim+) for the production of stable ferrofluids in water. Moreover, Fe3O4@MCM-48 (0.1 g) with Fe3O4 particles embedded in the network of cubic mesoporous silica showed decolorization rates of up to ∼90% in 25 min for four dye (methylene blue, rhodamine B, malachite green, and methyl violet) solutions (50 mL, 100 mg L−1). In addition, the malachite green-adsorbed Fe3O4@MCM-48 can be separated and recovered under an external magnetic field. This method in which the long chain ionic liquid C16mim+ can be manipulated in turn not only as the modifier but also as the mesoporous templating agent provides important guidelines for the multifunctional applications of C16mim+ in the synthesis of various nanostructured materials.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）