CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Baosong Li,Dandan Li,Wei Chen,Yuying Liu,Jun Zhang,Yulei Wei,Weiwei Zhang,Wanchun Jia
Ni-W/TiN nanocomposite coatings were successfully prepared via pulse electroplating from an electrolyte containing suspended TiN nanoparticles . The effects of applied current density and deposition time on microstructure, morphology, composition, hardness and electrochemical behaviors of the obtained coatings were investigated. Results showed that the current density and deposition time affect remarkably the electrochemical co-deposition process and then the structure and characteristics of the composites. It illustrated that the nanocomposites are uniform, compact and crack-free. The nanocomposites prepared at I a = 3 A dm −2 and t = 20 min had the finest structure, showing a fine and smooth surface. EDS mapping and XPS spectra illustrated that the TiN nanoparticles had been homogeneously dispersed throughout the coating. 2.34 wt% TiN nanoparticles were embedded in Ni–W (68.56 wt% Ni and 29.1 wt% W) alloy matrix at I a = 3.0 A dm −2 . The inclusion of TiN nanoparticles in Ni–W could promote the nucleation and cause a distinct microstructural change. The crystallite size was in the range of 11–15 nm. The average roughness value ( R a ) is 65.7 nm and 73.8 nm for coating formed at 20 min and 40 min, respectively. The electrochemical measurements illustrated that I a = 3–5 A dm −2 and t = 40–60 min was the optimal operating parameters for the excellent anti-corrosion properties of Ni–W/TiN nanocomposites. The embedded TiN in Ni–W matrix could fill defects then improve its corrosion resistance . This electrodeposited Ni–W/TiN nanocomposites possess excellent hardness and superior corrosion resistance , and is expected to be applied in aggressive environment as a protective coating.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wen Wu,Ying Peng,Lingmiao Fang,Yawen Xuan,Huamei Tong,Deli Jiang
Constructing innovative heterostructured electrocatalysts with robust alloy-oxide interfaces are essential for hydrogen production. In this work, a strongly and abundantly coupled interfacial electrocatalyst comprising of CoRu nanoalloys anchored on W-CoO nanosheet (CoRu/W-CoO/NF) was synthesized by Co-MOF template conversion and hydrogen treatment methods. The strongly coupled interface between CoRu alloy particles and W-CoO nanosheets efficiently induce a charge redistribution at the interface which can modulate the electronic structure and optimize the adsorption of hydrogen intermediate, thereby significantly enhancing the HER activity. The obtained CoRu/W-CoO electrocatalyst exhibited excellent hydrogen evolution reaction (HER) catalytic performance with an overpotential of 31 mV at 10 mA cm –2 and excellent catalytic durability for 50 h. Moreover, the voltage of the two-electrode system assembled with CoRu/W-CoO and NiFe-LDH at a current density of 10 mA cm –2 is only 1.51 V, which is almost comparable to the assembled Pt/C||RuO 2 . This work paves the path for integrating metal alloys with W-doped transition metal oxide electrocatalysts for efficient hydrogen production.
研究领域:
电化学
·
催化
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材料科学
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Zongliang Xiao,Weizhen Liu,Gan Wan,Jianlei Liu,Lu Yu,Qian Zhang,Lei Han
The quest for advanced full-spectrum lighting technologies has driven the development of W-LEDs, while challenges remain in finding effective cyan emitters and ensuring outstanding thermostability. This study detailed the synthesis of the europium-doped CaO-Al 2 O 3 -SiO 2 -YF 3 glass-ceramics (GCs), which demonstrated efficient cyan emission when irradiated by 419 nm light, with a spectacular internal quantum efficiency of up to 83.24 %, and outstanding thermal stability of 90.2 %@100℃ compared to room temperature intensity. In practical applications, this GC was integrated with a 420 nm LED chip, (Sr, Ca)AlSiN 3 : Eu 2+ red and Y 3 Al 5 O 12 : Ce 3+ yellow phosphor in a prototype full-spectrum W-LED device. The device achieved an excellent color rendering index (94), appropriate chromaticity coordinates (0.3789, 0.3950), and a well-defined correlated color temperature (4163 K). This study not only advances the application of GCs within W-LED technology but also reveals their potential in driving energy-saving and eco-friendly lighting solutions, thus providing a path to achieve superior full-spectrum lighting technology.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Hairui Deng,Xianan Li,Lingfeng Pan,Mengcheng Tang,Pengyuan Song,Binghua Long,Xu Sun,Yao Li,Han Zhang,Shibo Wang,Zhaojie Wang,Xiangdong Kong
Sonodynamic therapy (SDT) is a non-invasive, non-toxic technique that shows strong potential for tumor treatment: however, its application is limited by a lack of efficient sonosensitizers, insufficient oxygen supply, and high levels of glutathione (GSH) in tumors. In this study, a nanosonosensitizer, single-atom W anchored hexagonal boron nitride@ferrihydrite@trisulfide bond-modified carboxymethyl chitosan (W-BN@Fht@TSCM) nanocomplex, is developed that exhibits an efficient sonosensitizing effect and tumor microenvironment remodeling ability, thereby enhancing SDT. W-BN is prepared by anchoring monatomic W onto the surface of hexagonal boron nitride (h-BN) nanosheets, which exhibit a superior piezoelectric response to that of h-BN owing to the breaking of lattice symmetry. This excellent piezoelectric response facilitates the production of more reactive oxygen species under ultrasound conditions. Moreover, H 2 O 2 in the tumor microenvironment is decomposed to O 2 by Fht nanoparticles, which serve as catalase-like nanoenzymes, thereby alleviating hypoxia and providing sufficient substrates. Additionally, TSCM, which provides three unique redox sites and exhibits a high redox potential, rapidly and efficiently consumes GSH, weakens the antioxidant defense mechanism of tumor cells and enhances the efficacy of SDT. Improving the piezoelectric response of the material while remodeling the tumor microenvironment demonstrates strong therapeutic effects and provides a reference for the design of SDT nanosystems.
研究领域:
生物医学工程
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肿瘤学
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纳米医学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2023
·Vol. 20
·期 4
·2229-2238
·
IF 2.1
Zhonghuai Yi,Yi Sun,Ning Zhang,Huiwen Xiong
The miniaturization and mobility of nuclear reactors have become an important trend in the development of nuclear energy. In order to simplify the design of shielding materials with improved complexity and reduced weight, 3D B 4 C-W-based composites were fabricated via fused deposition molding using highly-filled granular feedstocks containing 62 vol% B 4 C-W powders (boron carbide accounted for 30 wt% and tungsten for 70 wt%) and 38 vol% polymer binders (60 wt% Carnauba wax, 22 wt% polypropylene, 13 wt% polystyrene, and 5 wt% stearic acid). The rheological properties and microstructure of the feedstock and extruded filaments were clarified. Roles of the printing parameters including extrusion temperature, platform temperature and deposited-layer height in the morphology of 3D composites were investigated in detail. Extruded filaments with good shape retention, dense fracture surface, and uniformly dispersed B 4 C-W grains were achieved, benefiting from the smooth printing and shear thinning behaviour of the feedstock. Defects including warping, small pores or stacking pores could be formed under improper printing parameters, owing to the poor bonding strength between deposited layers induced by thermal internal stress or decomposition of wax. 3D composites with large size of 130 × 130 × 5 mm were fabricated, which showed a satisfactory compressive strength of 34.8 MPa. This work showed a facile route to fabricate 3D radiation shielding materials based on highly-filled polymers.
研究领域:
材料科学
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核能工程
·
增材制造
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 3
·258
·
IF 4
Ling Xie,Zilong Huang,Yapeng Zhan,Jiahao Huang,Chao Wang,Riyang Shu,Junyao Wang,Libin Lei,Jianping Liu,Zhipeng Tian,Ying Chen
Cleavage of C-C bonds is crucial for hydrogen production via aqueous phase reforming of biomass-derived oxygenates. In this study, the hydrogen production performance and C-C bond cleavage capacity of Ni-W/AC catalysts with varying W/Ni ratios are evaluated using ethylene glycol as a model compound. A series of APR experiments conducted suggests that Ni-0.2W/AC catalyst exhibits the highest C1/C2+ratio of 15.87 and achieves a hydrogen yield of 47.76%. The enhanced Ni-W bimetallic interactions, which significantly improve the efficiency of C-C bond cleavage and increase catalyst activity by promoting active site dispersion, are confirmed by detailed characterization techniques. Further analysis of product distribution provides insights into the reaction pathways of ethylene glycol and the reaction mechanism for ethanol during aqueous phase reforming. All the results indicate that this catalytic reforming method effectively facilitates C-C bond cleavage and hydrogen production, contributing to a better understanding of APR mechanisms for biomass-derived oxygenates.
研究领域:
催化化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Qi Yuan,Sen Wang,Gaobin Liu,Kuoming Song,He Zhao,Shuai Yan,Xin Li
Dense MgO–12% TiO 2 (w) ceramics containing 12 wt% TiO 2 , which were doped with Li 2 CO 3 –Bi 2 O 3 composite sintering aids, were prepared at a low sintering temperature of 950 °C in this study. The effects of sintering additives on the sintering characteristics, phase composition, microstructure, and dielectric and mechanical properties of the ceramic samples were systematically investigated, and the influences of their phase composition and microstructure on the dielectric and mechanical properties were examined. The introduction of sintering aids produced a new Bi 4 Ti 3 O 12 phase in the sample structure, while the residual Bi 2 O 3 mixed with the newly formed Mg 2 TiO 4 and Bi 4 Ti 3 O 12 phases distributed at MgO grain boundaries formed a structure surrounding MgO grains. This structure filled the pores in the ceramic sample, which increased its density and enhanced the mechanical properties. At a Li 2 CO 3 –Bi 2 O 3 content of 15 wt%, the density, flexural strength , and Vickers hardness of the ceramic samples reached their maximum values of 3.4 g/cm 3 , 218.9 MPa, and 778.7 HV, respectively. However, the further increase in the Li 2 CO 3 –Bi 2 O 3 content deteriorated their dielectric properties although the dielectric constant and dielectric loss remained below 13.4 and 2.1 × 10 −3 , respectively. The findings of this work indicate that Li 2 CO 3 –Bi 2 O 3 sintering aids can significantly lower the sintering temperature of MgO–12% TiO 2 (w) ceramics and control their dielectric and mechanical properties through microstructural changes.
研究领域:
材料科学
·
陶瓷
·
介电学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2014
·
IF 2.354
Yanfeng Ji,Wanli Kang,Lingwei Meng,Leilei Hu,Hongbin Yang
A supramolecular recognition system was constructed based on the host–guest interaction with water-soluble β-cyclodextrinpolymer-P(AM/A-β-CD/NaA) as the host polymer and hydrophobically modified polyacrylamide-P(AM/C 18 /NaA) as the guest one. The guest polymer contains a small amount of hydrophobic octadecyl groups. High viscosity enhancement was observed when P(AM/A-β-CD/NaA) was added to P(AM/C 18 /NaA) solution, the concentration of P(AM/C 18 /NaA) was under the critical aggregation concentrations (CAC), as a result of the polymer inclusion association. The influences of salt concentration, shearing, pH values and temperature on the viscosity of mixture solution were also studied. O/W crude oil emulsion stabilized by the complex was prepared. A laser particle size analyzer and Turbiscan Lab Expert stability analyzer were employed to study their stability. The results indicated that mixture emulsion became more stable than the single amphiphilic polymer's. This is because that the net structure of elastic polymer in the continuous phase has the ability to hold oil droplets at the low concentration of P(AM/C 18 /NaA). The stability mechanism of O/W emulsion was indicated by three-stage visual rheological method. In this paper, the stability of inclusion complex is discussed, and the mechanism of the enhanced oil emulsification is further explored.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Shanshan Deng,Qingfeng Chang,Donglai Li,Boyu Wang,Haibo Jin,Jingbo Li
VO2 is a promising candidate for smart energy-saving windows because of its unique thermochromism but suffers from a high transition temperature of 68 °C and poor thermochromic performance near room temperature. We fabricated a W-VO2/Cs0.32WO3 (CWO) composite flexible film, which shows a low transition temperature of 31.1 °C (W-VO2/CWO = 1:1) and much enhanced near-infrared shielding performance. The optimal W-VO2 + 0.5CWO reaches a desired near-infrared shielding efficiency of 76.34%. A model-house test under simulated solar irradiation further signifies the excellence of the W-VO2 + 0.5CWO composite flexible film under ambient conditions. The robust performance is attributed to the synergetic effects between W-VO2 and Cs0.32WO3, among which the former possesses a low MIT transition temperature and the latter possesses photo-thermal performance.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 10
·e53590
·
IF 3
Sisi Yuan,Yongjun Wang,Xiujun Wang,Donghua Liao,Ming Duan,Shenwen Fang
The block polyether demulsifier prepared by ring-opening polymerization of ethylene oxide and propylene oxide under high temperature and high pressure is the most widely used demulsifier for water in crude oil emulsion. It has the high synthesis risk and cost. Therefore, the development of non-block polyether demulsifier has attracted more and more attention. In this article, a new type of demulsifier was sythesized by radical polymerization of acrylate and cationic monomer. It was found that the copolymer PMA-co-PDBC of methyl acrylate (MA) and benzyldimethyl [2-[(1-oxoallyl)oxy] ethyl] ammonium chloride (DBC) synthesized in the mixed solvent of dipropylene glycol methyl ether and water had a good performance. When dosage of PMA-co-PDBC was 200 mg/L, the dehydration rate of water in crude oil emulsion with 50% water content can reach 80% at 80°C within 4 h. Structural and interface properties analysis presented that PMA-co-PDBC had a microblock structure similar with block polyether and it can effectively reduce the strength of W/O interfacial film to realize the demulsification. Although the demulsification performance of PMA-co-PDBC was not better than block polyether, its preparation safety and cost are much better. The results of this article can provide a new option for the development of crude oil demulsifier.
研究领域:
化学工程
·
石油化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Qiang He,Yongjuan Wang,Yuming Zhou,Man He,Ran Xu,Saichun Hu,Wenting Wu,Ruili Wang
Passively responsive thermochromic smart window, which can modulate indoor incident solar light automatically at relatively high outdoor temperature, is a practical energy-saving device for construction and automotive industries. In this paper, a thermochromic composite hydrogel film based on W-doped vanadium dioxide (W-VO 2 ), poly N-isopropyl acrylamide (PNIPAM) and polyacrylamide (PAM) is presented and this hydrogel film was prepared between two quartz substrates to form the sandwich structured smart window. In this thermochromic system, 2 wt% monoclinic W-VO 2 were dispersed in the hydrogel film with the thickness of 0.1 mm. The introduction of PAM changes the flow-state PNIPAM microgel to hydrogel, which dramatically improved the practicality of the PNIPAM-based smart window. When the outdoor temperature is higher than 40 °C, the solar modulation capacity of this passive smart window, with a high luminous transmittance of 72% at 25 °C, can reach 46.3%. The smart window possesses high solar modulation ability and more than 20% luminous transmittance even after 40 times high temperature durability tests.
研究领域:
材料科学
·
能源效率
·
智能材料
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Magnetochemistry
·
2022
·Vol. 8
·期 8
·75
·
IF 3.336
Yujie Yang,Congliang Chen,Dongyang Chen,Yingming Zhang,Yuting Meng,Cong Zhang,Shuangjiu Feng
The solid-state reaction method is used to synthesize W-type Sr hexagonal ferrites Sr0.8Pr0.2(Zn1.0−xCox)2Fe16O27(x = 0.00, 0.15, 0.30, 0.45, 0.60, 0.75). The results of XRD for the W-type hexagonal ferrites, when Co content (x) is 0.00 ≤ x ≤ 0.75, exhibit that they are in the single W-type hexaferrite phase. As shown by morphological analysis, the particles are hexagonal-shaped platelets. The saturation magnetization (Ms) and magneton number (nB) increases with Co content (x) from 0.00 to 0.60.MsandnBbegins to decrease at Co content (x) ≥ 0.60. With increasing Co content (x) from 0.00 to 0.75, the magnetic anisotropy field (Ha), first anisotropy constant (K1), and coercivity (Hc) decrease gradually. The values of DC electrical resistivity for W-type hexagonal ferrites Sr0.8Pr0.2(Zn1.0−xCox)2Fe16O27(0.00 ≤ x ≤ 0.75) are in the range of 20.854 × 107Ω-cm and 22.755 × 107Ω-cm.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）