APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Meiqing Guo,Weijia Meng,Xiaogang Zhang,Xiao Liu,Zhongchao Bai,Shuai Chen,Zhihua Wang,Fuqian Yang
We report a facile route to synthesize porous Sn nanocrystals@acetylene black microspheres (Sn@AB MSs) via a galvanic replacement reaction of Zn microspheres in a SnCl 2 solution consisting of acetylene black (AB). The half cells of lithium-ion batteries with the Sn@AB MSs as the working electrode have a charge capacity of 480.8 mA h g −1 at 100 mA g −1 after 100 cycles, and the charge capacity of the half cells after the 100th cycle is slightly larger than that after the 80th cycle. The SEM images reveal that the electrode layer from the Sn@AB MSs experiences surface cracking during electrochemical cycling, while prolonged cycling leads to the closure of cracks. Electrochemical cycling induces self-organization of Sn and AB to form rose-like porous Sn@AB/Li 2 SnO 3 microflowers from porous Sn@AB MSs. The closure of cracks and formation of porous Sn@AB/Li 2 SnO 3 microflowers likely cause the increase of the charge capacity. The experimental results demonstrate that the porous Sn@AB MSs with acetylene black around Sn can alleviate the large volumetric strain due to lithiation/delithiation, reduce the migration distance of lithium to active sites, and promote exceptional Li storage, leading to better cycling stability.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
固体物理
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DOI
高影响因子
Catalysts
·
2026
·Vol. 16
·期 5
·426
·
IF 4.5
Yankai Li,Xu Feng,Shuo Wang,He Huang,Qingrun Meng
In this work, various types of organosilanes were introduced into Sn-Si oxide through a simple aerosol process to yield synthesis precursors. Then, a series of Sn-Beta zeolites were successfully synthesized using a hydrothermal method in the presence of fluoride. The influence of amine groups (A, 2A, and 3A), the length of branched chains present in the organosilanes, as well as the use of dipodal silanization agents (B2A) on the morphology, pore structure, acidic properties, coordination state, and content of Sn species in the obtained Sn-Beta zeolite samples was investigated. Compared to the organosilane-free Sn-Beta (crystal size: 1.3 μm; Si/Sn = 119; Lewis acid density: 77 μmol·g−1), all monopodal organosilane-doped samples (Sn-Beta-A, -2A, and -3A) exhibited reduced crystal sizes (~0.9 μm) and increased specific surface areas (up to 502 m2·g−1for Sn-Beta-2A). UV–Vis spectroscopy showed that Sn-Beta-2A (containing two amine groups) achieved the highest optical bandgap (4.68 eV) and the strongest suppression of extra-framework SnOxspecies (peak at ~269 nm), indicating the most isolated tetrahedral framework Sn4+sites. This sample also delivered the highest Lewis acid density (225 μmol·g−1) and the best catalytic performance in the Baeyer–Villiger oxidation of cyclohexanone (39% conversion, TON = 106) and 2-adamantanone (37% conversion, TON = 101). By contrast, the dipodal organosilane (B2A) caused severe steric hindrance, yielding the lowest crystallinity (relative crystallinity 64%), Si/Sn ratio (158), Lewis acid density (38 μmol·g−1), and catalytic activity, despite forming a nanoaggregate morphology with high mesoporosity (V meso = 0.20 cm3·g−1). These quantitative results demonstrate that monopodal organosilanes with two amine groups optimally balance Sn incorporation and textural properties, whereas dipodal silanes hinder framework Sn entry. This study provides clear, numerically grounded guidelines for selecting organosilane functional groups to design high-performance Sn-Beta zeolites.
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Haozhe Pang,Shimao Shangguan,Ya Chen,Yue Zhang,Siyuan Fan,Lida Shen,Zongjun Tian,Zhidong Liu
Bronze, as a solid self-lubricating material, is widely used in various frictional applications. However, under increasingly common high-frequency and high-load conditions, particularly in the absence of lubricants, bronze layers are prone to rapid wear. Incorporating MoS 2 particles to fabricate solid self-lubricating composite coatings is considered a promising approach to improve overall performance in harsh environments. In this study, a friction-assisted jet electrodeposition process is employed to fabricate Cu-Sn-MoS 2 composite coatings. This technique enhances particle embedding and surface leveling, producing uniform and dense coatings with significantly improved tribological performance. The methodological framework of this study involves the fabrication of Cu-Sn-MoS 2 composite coatings via friction-assisted jet electrodeposition, followed by systematic characterization of their surface morphology, microhardness, adhesion, and tribological behavior. The results show that a MoS 2 content of 5 g/L provides a uniform and compact surface with fine grains, sufficient microhardness and adhesion strength, and a continuous lubricating film formed during wear. The wear mechanism was revealed to explain why the Cu-Sn-MoS 2 coating exhibited a strong performance in mechanical properties and wear resistance. This content achieves the lowest friction coefficient and the best wear resistance among all tested compositions.
研究领域:
材料科学
·
表面工程
·
摩擦学
·
电沉积
·
复合涂层
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Chong Xie,Shenghui Yang,Jianwen Shi,Beibei Li,Chen Gao,Chunming Niu
The stability of MnO x based low temperature SCR catalysts remained to be a serious issue. This report explored use of multi-walled carbon nanotubes (MWCNTs) network with uniform structure as a “rigid” pore template for synthesis of mesoporous MnO x -TiO 2 SCR catalyst with high surface area and high stability. The results showed that MWCNT network imposed MnO x -TiO 2 catalyst a mesoporous porosity with a narrow pore size distribution centered on ∼13.2 nm and a surface area of 131.6 m 2 g −1 stabilized at 500 °C. The mesoporous structure was formed by interconnected nanoparticles, comprised of crystallized rutile TiO 2 core surrounded by amorphous MnOx , with an average diameter of ∼8 nm. The catalyst exhibited an excellent low temperature SCR activity and selectivity as well as high resistance to deactivation and poison by H 2 O and SO 2 . SnO 2 modification led to degradation of catalytic performance in low temperature (60–180 °C) side, but improvement at high temperature side (240–360 °C), especially at high gas velocity, which can be attributed to change in structure, reactivity of MnO x and surface acidity induced by SnO 2 addition.
研究领域:
材料科学
·
环境科学
·
催化化学
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·Vol. 27
·期 37
·19939-19949
·
IF 2.9
Zhangheng Lai,Xiangbin Chen,Qixian Zheng,Zhengmao Luo,Zhongshuo Li,Ning Qi,Zhiquan Chen
Polycrystalline SnSe has been widely explored due to its relatively low thermal conductivity. Yet its thermoelectric performance is limited due to its poor electrical conductivity. In this work, polycrystalline SnSe alloyed with different contents of CuAgSe were fabricated by a high-energy balling and melting method, combined with spark plasma sintering. It is revealed that substitution of Ag and Cu at Sn sites actually enhances the electrical conductivity, especially under Sn-deficient circumstances where the formation energy of AgSn is lowered. When there was excessive addition of CuAgSe, the hole carrier concentration was reduced due to the formation of Agi, which acts as an electron donor. Additionally, partial substitution of Ag and Cu into the Sn vacancies slightly improves the Hall mobility and the density of states effective mass. With increased electrical conductivity while maintaining a stable Seebeck coefficient, the Sn0.99Se sample alloyed with 0.75% CuAgSe attains a maximum power factor of 6.40 μW cm−1 K−2 at 847 K. In addition, a peak zT value of 0.97 at 847 K is achieved, combined with only a marginally decreased thermal conductivity, thereby exhibiting a prominent improvement over that of the pure SnSe sample. The present work opens up a new perspective for optimizing the thermoelectric performance of SnSe compounds with the strategy of tuning the content of Sn and alloying with CuAgSe.
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产品关联
DOI
PubMed
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2025
·Vol. 222
·期 22
·2500553
·
IF 1.9
Yaqi He,Xinhua Li,Lihua Zhang,Jiawei Xu,Songhua Chen,Zongqing Ma
In this article, a batch of high-performance Sn-doped Nb 3 Al superconductors is prepared through mechanical alloying and subsequent low-temperature sintering. This article comparatively analyzes the superconducting properties, phase structure, and microstructure of Sn-doped Nb 3 Al under different sintering temperatures and sintering times to determine the most suitable sintering process for Sn-doped Nb 3 Al. The results show that the optimum sintering temperature of Sn-doped Nb 3 Al bulks is 800 °C, with an optimal sintering time of 5 h. The T c value of Sn-doped Nb 3 Al bulk obtained under this sintering condition is 14.8 k, and the value of J c is as high as 6.2 × 10 4 A cm −2 (4.2 K, 5 T). The elevated sintering temperature (900 and 1000 °C) results in significant growth of both Nb 3 Al grain size and Nb 2 Al nanoparticles. This reduces the number of effective pinning centers in the superconducting phase of Sn-doped Nb 3 Al, which severely weakens the flux pinning effect. As a result, the J c performance deteriorates gradually as the sintering temperature increases from 800 to 1000 °C. The extended duration of sintering time results in the formation of sintering holes, which significantly disrupt the continuity of the Nb 3 Al superconducting phase matrix and degrade its superconducting properties.
研究领域:
超导物理
·
材料科学
·
陶瓷与烧结
·
显微组织工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaojing Chen,Ning Zhang,Pengfei He,Xuli Ding
Low cost and considerable theory specific capacity (∼1195 mAh g −1 ) make Sb 2 SnO 5 (SSO) material becoming a potential candidate for sodium-ions battery anodes. However, the low electronic conductivity and sluggish ions transfer kinetic has inhibited the practical applications. Herein, we demonstrate a novel Sn/Sb@SSO@PCFs composite using simple but effective electrospinning methods, which enable SSO nanoparticles embedded with Sn and Sb nanodomains in situ generation. The SSO was first reported as anode for sodium-ion batteries and in situ generation Sb and Sn nanocrystals domain around the SSO oxides . Different from existing tactics, the unique composite establishes a robust and efficient electrical contact between the SSO and the conductive Sb and Sn phases, enabling fast ions and electrons transfer across the electrochemical active SSO/Sb/Sn. Meanwhile, the composites offer an opportunity to compromise the challenges faced by each entity and enhance the overall performance by circumventing the weakness of individual SSO, Sn and Sb. As evidenced, the as-fabricated composite has unexpected electrochemical properties , including high capacity and long cycle stability with a retention rate of 83% after 450 cycles at 0.5 C. Combined with synergistic Na + ions storage of SSO/Sb/Sb and a simple and scalable manufacturing process, this study provides a new strategy to modulate material delivering high capacity and cycle stability for the next generation sodium ions batteries (SIBs).
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 25
·10539-10554
·
IF 4.5
Wei Yinsha,Haider Zeeshan,Yu Yizhen,Li Bingzhi,Niu Haili,Qiu Ri,Ouyang Yibo,Liu Jie
Printed circuit boards (PCB) are easily corroded under moist environment due to formation of dendrites and short circuit. It would be a promising approach to exploit intentionally formed dendrite covered by functional coating for corrosion inhibition to elongate the lifespan of PCB. In this work, a facile electrodeposition method has been applied to grow dendritic tin onto Cu as a substrate for PCB. Bioinspired formation of superhydrophobic surface (SHS) and liquid-infused surface (LIS) are adopted to minimize access of moisture to underneath Cu metal. In this regard, dimethylsilicone oil and zeolitic imidazolate framework (ZIF) nanoparticles are infused into dendritic matrix to form a solid–liquid ZIF-LIS coating. Morphology, composition and wettability are characterized by different sophisticated techniques. Beyond significant improvement in corrosion resistance, ZIF-LIS has demonstrated self-healing properties, improved mechanical stability and anti-icing behavior. Current finding provides a new approach to fabricate coating for PCB having extended stability against corrosive degradation.
Graphical abstract
研究领域:
材料科学
·
表面工程
·
电化学
·
纳米技术
·
腐蚀与防护
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 2
·1846-1854
·
IF 5.532
Xinkun Liu,Ying Dai,Xinmei Pei,Wen Chen
The electrocaloric (EC) effect cooling technique of environmentally friendly lead-free thin film materials driven by electric fields has recently gained tremendous attention due to the urgent demand for microelectronic and integrated circuit refrigeration devices. However, the widespread use of lead-free materials in EC devices is seriously hindered due to the small electrocaloric temperature change (ΔT) within a narrow operation temperature span (T span ) near room temperature. Here, lead-free Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9-x Sn x O 3 (BCZT-xSn, 0 ≤ x ≤ 0.03) thin films were prepared on substrates (Pt/Ti/SiO 2 /Si) via a sol-gel route. The BCZT-0.02Sn thin film presents an excellent EC effect (ΔT = 32.74 K, ΔS = 37.18 J kg −1 K −1 ) and large EC strength (ΔT/ΔE = 0.033 K cm kV −1 , ΔS/ΔE = 0.037 J cm K −1 kg −1 kV −1 ) over a wide T span (∼26 K) under 1000 kV cm −1 near room temperature. The giant ΔT is mainly attributed to the emergence of an intermediate O phase and the formation of a multiphase (R, O and T phases) coexistence structure at room temperature, while the diffuse phase transition behavior is responsible for the wide T span . Our study provides a new idea for developing environment-friendly EC materials with an excellent room-temperature ΔT over a broad operational temperature region.
研究领域:
材料科学
·
功能材料
·
固态物理
·
环境友好材料
·
制冷技术
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Kaixuan Cui,Ping Li,Wang Zhao,Chunrong Liu,Shengwei Li,Dongmei Zhou,Xuanhui Qu
Li||Sb–Bi–Sn liquid metal batteries (LMBs) have comprehensive advantages of a high energy density , excellent rate capability, low material costs, and high cycle performance. However, the corrosion of the positive electrode to the current collector at high temperatures cannot be neglected over the long term. Here, we investigate the corrosion behavior of SS304 in two types of Sb–Bi–Sn alloys under static and cell cycling conditions. Interestingly, we find that the cell performance of Li||Sb–Bi–Sn LMBs are not affected by corrosion between the positive electrode and stainless-steel current collector. The corrosion products and their participation in the cell reaction process are determined using ex situ analyses and electrochemical measurements. Bi not only inhibits the dissolution of SS304 in Sb–Bi–Sn alloy but also spontaneously promotes the decomposition of Fe–Sb and Fe–Cr–Sb corrosion products during lithiation, releasing the active component Sb, and Sb–Bi–Sn alloy is recovered. Encouragingly, even in the event of corrosion, the cell capacity, efficiency, and cycle stability remain almost unaffected due to this self-healing action of Bi. This study represents a new direction toward inhibiting the corrosion of positive electrode and stabilizing cell performance for practical application and commercialization by alloying.
研究领域:
电化学
·
储能
·
材料科学
·
电池技术
✓ 已验证
DOI
高影响因子
BMC Chemistry
·
2026
·Vol. 20
·期 1
·72
·
IF 5.1
Zhang Qiuyun,Zou Huixin,Hu Siyu,He Shijian,He Maozhen,Zhang Xiaojuan,Wang Jialu,Zhang Yutao
Metal-organic frameworks (MOFs) have attracted significant research interest as promising innovative platforms for designing heterojunction photocatalysts. Herein, we report the rational design and preparation of an AgI@Sn-BDC-NH 2 heterojunction composite via a simple and facile in-situ route to degrade organic dyes (RhB). The AgI@Sn-BDC-NH 2 structural, surface, and optical characteristics were thoroughly examined by means of XRD, FTIR, SEM, EDS, UV-Vis DRS, VB-XPS, N 2 physisorption, TG, XPS, PL, transient photocurrent, and EIS techniques. The experimental results confirmed that AgI particles were dispersed on the surface of flower-like Sn-BDC-NH 2 , and the introduction of AgI significantly boosts the photocatalytic performance of the nanocomposites. Under the operating parameters (catalyst dosage of 0.5 g/L, RhB concentration of 30 mg/L, volume of 40 mL, and illumination time of 60 min), the 30-AgI@Sn-BDC-NH 2 with the AgI loading of 30% exhibited the highest degradation efficiency in RhB, reaching 94.7%, with a photocatalytic rate constant of 0.039 min − 1 , which was 3.22 times and 26.0 times that of pure AgI and Sn-BDC-NH 2 , respectively. The enhanced activity can be originated from the formation of Z-scheme heterojunction between AgI and Sn-BDC-NH 2 with intimate interfacial contact and the synergistic effects among the components, thereby providing a mesoporous structure and larger relative surface area (27.9 m 2 /g), improving utilization of visible light, more charge transfer channels, and lower electron-hole pair recombination rates. More crucially, it retained 78.1% degradation efficiency after five cycles, confirming excellent stability. Furthermore, trapping analyses suggest that e − , •O 2 − , and h + radicals dominate the degradation reaction pathway, and then a possible mechanism of 30-AgI@Sn-BDC-NH 2 Z-scheme heterojunction was proposed. Overall, this research work highlights the potential of using Sn-MOF-based heterojunction composites as practical photocatalysts for sustainable dye-contaminated wastewater treatment. Graphical The alternative text for this image may have been generated using AI.
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DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2023
·Vol. 56
·期 18
·185001
·
IF 3.4
Guohua Wu,Zhong Yu,Rongdi Guo,Zhiguang Wang,Hong Wang,Zhongqiang Hu,Ming Liu
To achieve compact and lightweight power conversion devices, magnetic core materials such as MnZn ferrite are highly desired with low core losses at high frequencies above megahertz. In this work, high-valent Sn4+ ions were doped into MnZn ferrite to manipulate the electromagnetic properties and suppress the high-frequency core losses. The distribution of Sn4+ in MnZn ferrite was investigated by transmission electron microscopy with energy dispersive x-ray analysis, which indicated that most of the substituted Sn4+ ions remained at the grain boundaries rather than dissolving into the lattice, and thus greatly impacted the electromagnetic properties of MnZn ferrite. The initial permeability and saturation induction decreased monotonically with the Sn substitution. The core loss was reduced to 457 kW m−3 at 3 MHz, 30 mT, and 25 °C when the Sn substitution content was 0.003, due to the effective suppression of eddy current loss and residual loss. The sample with a Sn content of 0.003 exhibited excellent overall electromagnetic properties, which could be potentially useful in high-frequency transformers, converters, and power sources.
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产品关联
DOI
高影响因子
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