JOURNAL OF NUCLEAR MATERIALS
·
2024
·
IF 2.8
Jiaqi Li,N. Daghbouj,Xiaoxun He,Ke Chen,Xingzhong Cao,Shuoxue Jin,Jun Li,Haiyuan Wei,Junjun Zhou,Tongmin Zhang,Shuai Xu,Fangfang Ge,J. Duchoň,A.T. AlMotasem,T. Polcar,Bingsheng Li
Layered carbides and borides, blending ceramic and metallic characteristics, present compelling prospects for future nuclear reactor applications due to their complex nanolaminate crystal structure. To explore the behavior of Fe 2 AlB 2 under different conditions, helium irradiation is conducted across saturation fluences and under different annealing and irradiation temperatures. Room temperature (RT) irradiation causes some changes: a-lattice expands 0.3 %, c-lattice contracts 0.07 %, and an embedded amorphous layer into the matrix is formed. 400 °C annealing keeps an amorphous structure whereas 800 °C annealing fully recrystallizes with bubble growth. Increasing the irradiation temperature to 400 °C with the same fluence, smaller bubbles form without an amorphous layer, indicating defect recombination depends on helium attachment to vacancies. Under irradiation at 700 °C, faceted bubbles develop exclusively within Fe 2 AlB 2 , with no such bubbles in Al 2 O 3 . These faceted bubbles align themselves along (110) planes. Simultaneously, irradiation prompts tangled dislocations within the damaged layer, fostering the congregation of polygonal bubbles along grain boundaries (GBs) and creating denuded areas at GBs. Fe 2 AlB 2 demonstrates remarkable oxidation resistance under high-temperature irradiation, maintaining surface stability without the cracks seen in ion-irradiated Ti 3 SiC 2 and Ti 2 AlC at RT. Fe 2 AlB 2 shows promise for use in reactors operating at temperatures above 500 °C due to its resilience to irradiation. Further investigation is warranted for its application in reactors operating in environments exceeding this threshold temperature.
研究领域:
材料科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Qian Liu,Li Zhang,Yucheng Liu,Xiaoqiang Zheng,Xuna Liu,Zhongquan Zhong,Liping Wei,Qianqian Zhao,Tingting Yao,Ping Yang
With appropriate cerium (Ce) doping, the layered lithium ion-sieve precursor Li 1.37 Ce 0.001 Mn 1.22 O 3 was synthesized using hydrothermal and solid-phase calcination, which exhibited Li/Mn ratio exceeding 1, indicating a high theoretical adsorption capacity. The incorporation of Ce further stabilized the spatial configuration of the layered ion-sieve and controlled the dissolution loss ratio of manganese (Mn) to approximately 0.55%. At 25 °C, with pH of 9 and initial lithium-containing solution concentration of 100 mg/L, the adsorption capacity can reach around 33 mg/g. Despite the presence of interfering ions, it maintained selective adsorption of lithium (Li). The lithium adsorption process by layered lithium ion-sieve adhered to the Langmuir adsorption isotherm model, while the kinetics of adsorption conformed to pseudo-second-order kinetics. This adsorption process was characterized as spontaneous and endothermic, with higher temperatures and concentrations of lithium solutions facilitating both the adsorption process and capacity. It was found that in simulation analysis, compared to the cubic ion-sieve precursor, Li in the layered structure occupied more spatial points, resulting in a more compact stacking and increased bond energy. It alleviated the dissolution loss of Mn during the pickling process. The proximity of Ce resulted in a reduction of the charge on Mn and Li. An appropriate amount of Ce doping will enhance the valence state of Mn; however, excessive Ce doping led to the depletion of electrons from nearby Mn and Li. During pickling process, the Li surrounding Ce in the precursor were preferentially replaced by hydrogen (H) due to their lower charge.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 30
·2102827
·
IF 18.808
Bo Wang,Jianping Yan,Yufei Zhang,Minghui Ye,Yang Yang,Cheng Chao Li
Aqueous zinc-ion batteries (ZIBs) have attracted significant attention due to their intrinsic safety, cost-effectiveness, and environmental friendliness. However, the common zinc metal anode suffers from zinc dendrite formation, self-corrosion, and surface passivation, which impede the further application of aqueous ZIBs. Herein, carbon-inserted molybdenum dioxide (MoO 2 ) materials with laminated structure are designed as novel intercalation-type anodes for ZIBs by combination of interlayer engineering and in situ carbonization of aniline guest in molybdenum trioxide interlayers. The uniform dispersion of carbon layers in laminated MoO 2 not only provide fast transportation paths for electron but also strengthen the framework of MoO 2 , leading to high structural integration during high-rate cycling. Benefiting from the unique structural design, the carbon-inserted MoO 2 electrode exhibits high initial Coulombic efficiency, excellent cycling stability, and outstanding rate capability. Multiple ex situ characterizations reveal its excellent electrochemical stability is derived from reversible intercalation mechanism and ultrastable structural framework. Furthermore, the rocking-chair zinc-ion full battery assembled with the zinc pre-intercalated Na 3 V 2 (PO 4 ) 2 O 2 F cathode presents excellent stability and ultralong lifespan with a high capacity retention of 91% over 8000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Advanced Physics Research
·
2023
·Vol. 2
·期 11
·2200125
·
IF 0
Yuanlong Li,Mengruizhe Kong,Wei Bai,Liang Sun,Huiyi Li,Chong Xiao,Yi Xie
The development of nano–manufacture technology in the twenty-first century has paved the way for artificial nanostructure constructions like man–made superlattices, providing historical breakthroughs in thermal physics and thermoelectrics by the modulation of phonons. Still, high–performance thermal insulators haven't come into operation due to the arduousness, costing and unscalability of artificiality. Herein, intentional engineering on a so–called ‘natural superlattice’ with alternating PbSe– and Bi 2 Se 3 –layer crystal structure is brought forth to recreate the mechanism of artificial superlattices and boost phonon localization. The thermal conductivity notably shows a direction–specific reduction, leading to minimum approaching and enhanced anisotropy. The modification of the natural framework and its effects have been supported by various transport and structure studies. This work sets a generalizable example for natural layered material engineering that bridges between the inflexible, changeless but self–assembled natural layered compounds, and the highly efficient, delicately tailored but unscalable artificial superlattice complexes. The methodology promises new horizons for practicable thermal management.
研究领域:
热物理
·
纳米制造
·
热电材料
✓ 已验证
DOI
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 20
·12698-12705
·
IF 10.733
Xulin Cui,Xiaoli Wu,Jie Zhang,Jingtao Wang,Haoqin Zhang,Fengguang Du,Lingbo Qu,Xingzhong Cao,Peng Zhang
Two-dimensional (2D) lamellar membranes with fast molecular transfer and precise sieving hold great promise for a wide range of separation applications. However, existing transfer channels are horizontally arrayed with long and tortuous in-plane paths, leading to high flow resistance and hence limited molecular permeance. Herein, we report a loosely stacked lamellar membrane with fastigiated channels using rigid and irregular molybdenum disulfide (MoS2) flakes as building blocks. Through filtration, MoS2 flakes stack in a disordered manner and construct hierarchical transfer channels: narrow gaps (∼1.8 nm) at the contacting edges of flakes and large cavities (∼8.3 nm) among stacked flakes. The large cavities work as low-barrier channels and result in ultrafast molecular permeation: over 1430 and 5000 L m−2 h−1 bar−1 for water and organics, respectively. However, the narrow gaps afford excellent dye rejection: over 90% for dyes with a size of above 1.9 nm. Dynamic simulation demonstrates that the flow resistance of fastigiated channels is much lower than that of horizontal channels. Furthermore, the corresponding model equation is established for describing molecular transfer in such channels. In addition, the membrane exhibits adequate structural stability under ultrasonication and acid or alkali environments, guaranteeing potential for long-term operation.
研究领域:
材料科学
·
分离技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2016
·Vol. 642
·期 4
·343-349
·
IF 1.261
Xiao Zhao,Dajiang Mei,Jingli Xu,Yuandong Wu
Three compounds A Sb 2 (SO 4 ) 2 (PO 4 ) ( A = H 3 O + , K, Rb) were obtained from the reactions of Sb 2 O 3 , A 2 CO 3 ( A = Li, Rb) or K 2 SO 4 and NH 4 H 2 PO 4 in H 2 SO 4 (98 %) at 220–250 °C. Their structures were determined by single-crystal X-ray diffraction. All compounds crystallize in the triclinic space group P (no.2) and are isostructural. The crystal structures consist of two-dimensional 2 ∞ [Sb 2 (SO 4 ) 2 (PO 4 )] – anionic layers and alkali cations, which are located between anionic layers. The anionic layers are composed of [SbO 4 ] ψ-trigonal bipyramids, [SbO 5 ] ψ octahedra, [SO 4 ] tetrahedra, and [PO 4 ] tetrahedra. All compounds are characterized by solid state UV/Vis/NIR diffuse reflectance spectra, FT-IR spectroscopy, and Raman spectroscopy.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2017
·
IF 3.833
Zongpeng Yang,Xiaoli Chen,Zhou Xu,Meina Xiao,Liangzhi Hong,To Ngai
In this work, we have investigated the effect of laminar flow shearing on the formation of block copolymer agglomerates in viscous medium. Under a laminar flow shearing, the block copolymer solution droplets were spontaneously emulsified and were then elongated into protofibers, which in turn transformed into particles with various morphologies. Besides micro-/nanorods, which were previously reported for homopolymers, sphere and sheetlike structures were unexpectedly fabricated from block copolymers depending on the solvent quality, solvent exchange rates, and the entanglement of the polymer chains. In particular, the sheet structure, fabricated from poly(ethylene glycol)-b-polystyrene (PEG-b-PS), can be fixed by UV irradiation when photo-crosslinkable azide groups were introduced onto the polystyrene block. Surprisingly, we found that the fixed sheetlike structures show demulsification capability in tens of seconds, which may have great potential application in the separation of oil from emulsions.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2023
·
IF 8.6
Yaqi Chen,Xieyu Xu,Jianli Cheng,Xuyang Wang,Dawei Wang,Yongjing Wang,XingXing Jiao,Jian Chen,Shizhao Xiong,Zhongxiao Song,Yangyang Liu
All-solid-sate batteries (ASSBs) with a NASICON-type solid-state electrolyte (SSE) of Li1.3Al0.3Ti1.7(PO4)3 (LATP) can be accepted as a promising candidate to significantly improve safety and energy density due to their high oxidation potential and high ionic conductivity. However, thermodynamic instability between the cathode and LATP is scarcely investigated during cosintering preparation for the integrated configuration of ASSBs. Herein, the structural compatibility between commercially layered LiNi0.5Co0.2Mn0.3O2 (NCM523) and LATP SSE was systematically investigated by cosintering at 600 °C. It is noticeable that an extreme side reaction between Li from NCM523 and phosphate from LATP happens during its cosintering process, leading to a severe phase transition from a layered to a spinel structure with high Li/Ni mixing. Consequently, the capacity of NCM523 is lost during the preparation of the NCM523–LATP composite cathode. Based on this, we suggested that the interface modification of the NCM523/LATP interface is valued significantly to inhibit this extreme side reaction, quickening the application of LATP-based ASSBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Min Gao,Xuexi Zhang,Mingfang Qian,Lin Geng
Aluminum-matrix nanocomposites (AMCs) reinforced by SiC nanoparticles (SiCnp) were prepared by directional freezing combined with spark plasma sintering (SPS) and hot extrusion. The effect of SiCnp and layered structure on the microstructure and mechanical properties of SiCnp/Al nanocomposites was studied. The composite showed a layered structure consisting of SiCnp-rich and poor areas. With addition of 1 wt.% SiCnp with average diameter 50 nm, the composite showed the best strength and toughness matching, with ultimate tensile strength (UTS) 326.2 MPa (35.4% higher than that of homogeneous counterpart) and fracture elongation 8.6%. The enhanced UTS in the layered nanocomposite was mainly attributed to the hetero-structure-induced formation of high density geometrically necessary dislocation (GND) in the near SiC-Al interface areas, which accordingly created pronounced hetero-deformation-induced (HDI) stress and work hardening capacity. The creation of layered architecture by feasibly directional freezing can advance the development of biomimetic layered composites with enhanced strength and toughness.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Xiaoxuan Tan,Yang He,Chunhong Wang,Yu Zhang,Wenshu Wang,Hanyu Li,Rongrong Yu
The proliferation of electronic devices has made electromagnetic interference (EMI) shielding increasingly critical for both device performance and human health protection. Here, we demonstrate a hierarchical composite film that achieves exceptional EMI shielding through the synergistic integration of magnetic nanofibers and MXene nanosheets. By combining electrospinning and layer-by-layer assembly, we fabricate a composite structure where Fe 3 O 4 -loaded cellulose/PAN nanofibers alternate with Ti 3 C 2 T x MXene layers, creating multiple heterogeneous interfaces for enhanced electromagnetic wave attenuation. The engineered architecture promotes multiple electromagnetic loss mechanisms through interface polarization, magnetic losses, and multiple internal reflections. The optimized composite exhibits remarkable performance metrics: achieving a thickness-specific shielding efficiency of 118 dB/mm at just 0.18 mm thickness, significantly surpassing current commercial standards. At 0.64 mm thickness, the electromagnetic shielding effectiveness reaches 33.2 dB, effectively blocking over 99.9 % of electromagnetic radiation. Notably, the composite demonstrates exceptional mechanical durability, retaining 96.8 % of its shielding effectiveness after 300 bending cycles. The integration of renewable cellulose and magnetic components with highly conductive MXene not only enhances electromagnetic wave attenuation but also promotes environmental sustainability. This combination of ultra-thin profile, superior shielding performance, and mechanical flexibility, coupled with eco-friendly material selection, provides a promising pathway for EMI protection.
研究领域:
材料科学
·
环境科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2024
·Vol. 17
·期 6
·5651-5660
·
IF 9.5
Dong Jingyu,Li Zhaoyang,Liu Congqi,Zhou Bing,Liu Chuntai,Feng Yuezhan
Controlling the orientation of two-dimensional MXene within layered films is essential to optimize or tune their mechanical properties and electromagnetic interference shielding (EMI) performance, but achieving the high orientation MXene layers on an industrial scale remains a challenging goal. In this paper, a scalable layer-by-layer blade coating (LbLBC) method was employed to fabricate highly oriented MXene/polyvinyl alcohol (PVA) films. During the LbLBC process, MXene/PVA colloid suffered a strong shearing effect, which induced the ordered alignment of MXene nanosheets along the direction of the blade movement. The orientation of MXene can be effectively adjusted by changing the scraping gap of LbLBC, achieving a maximum Herman orientation factor f of 0.81. As a result, the mechanical properties and EMI performance of the as-prepared MXene/PVA films are in direct proportion to their orientation, with the optimal values of tensile strength of 145.5 MPa, fracture strain of 19.6%, toughness of 17.7 MJ·m −3 , and EMI shielding effectiveness of 36.7 dB. Furthermore, the inherently low mid-infrared (mid-IR) emissivity of MXene, combined with the densely oriented structure affords the composite films with IR stealth, resulting in a substantial decrease from 150 to 66.1 °C in the radiative temperature of a surface. Conclusively, these scalable MXene/PVA films exhibit remarkable potential for integration into the next generation of multifunctional protective camouflage materials.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
CARBON
·
2017
·
IF 6.337
Shanshan Xiao,Hui Mei,Daoyang Han,Konstantinos G. Dassios,Laifei Cheng
Three-dimensional hybrid foams of SiC nanowires (SiC NWs) coated and bonded with nanostructured lamellar carbon films are, herein synthesized for the first time, by combination of unidirectional freeze drying and carbonization techniques. The crystallinity of the carbon films was tunable from amorphous carbon to graphene-like carbon by heat treatment of the as-received hybrid foams to different temperatures within the range of 600–1500 °C. The SiC NWs-nanostructured lamellar carbon (SiC NWs/C) hybrid foams exhibited electromagnetic (EM) wave absorbing properties highly superior to current state-of-the-art counterparts, at filler loadings as low as 9.2 mg/cm 3 . Effective absorption bandwidth of the SiC NWs/C foam was observed to cover the whole X-band frequency range of 8.2–12.4 GHz, with reflection loss values reaching −31 dB for an optimum thickness of 3.3 mm. The absorption efficiency of the SiC NW/C hybrid foams is discussed in the text in view of the highly absorbing layered morphology of the developed material, of interfacial polarization and multiple reflections effects and of polarization relaxation effects.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）