JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yu Xin,Haoyi Mou,Chang Miao,Shuqing Nie,Minyue Wen,Guowen He,Wei Xiao
The SnCu-SiO 2 @CNFs composite nanofibers are successfully fabricated by electrospinning and subsequent heat treatments, in which the Sn-Cu alloy particles are uniformly confined in carbon nanofibers (CNFs) in the presence of SiO 2 . The characterization results show that incorporating SiO 2 into the CNFs matrix can mitigate the problem of the phase separation between Sn-Cu alloy particles and CNFs and increase the fibrous structural integrity of the composite electrodes. Importantly, the SnCu-SiO 2 @CNFs-1.0 composite electrode displays the improved electrochemical performance when the amount of Cu(Ac) 2 is controlled at 1.0 mmol, in which the discharge specific capacity of the electrode not only delivers 501.8 mAh/g after 100 cycles at 100 mA/g, but also retains 467.4 mAh/g after rate cycles when the current density is abruptly recovered to 100 mA/g. Moreover, the SnCu-SiO 2 @CNFs-1.0 electrode can possess an enhanced Li + diffusion coefficient of approximately 1.58 × 10 −16 cm 2 s −1 and a high Warburg coefficient of 568.9 Ω cm 2 s −0.5 at room temperature. The enhanced electrochemical performance can be partly ascribed to the complete encapsulation of Sn-Cu alloy particles by the CNFs matrix, and partly to the promotion of the over-all electronic conductivity. Furthermore, the flexible and conductive CNFs matrix and the stable Cu 6 Sn 5 phase can conjoinedly accommodate the volume change of the electrodes during charge/discharge processes. Therefore, the facile strategy for encapsulating Sn-Cu alloy particles into CNFs may offer some a prospective instruction for the alloy anodes in the field of energy storage.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·Vol. 46
·期 43
·22508-22518
·
IF 5.816
Zhijun Zhang,Kezhen Chen,Jichang Lu,Qin Zou,Yuhui Zhao,Yongming Luo,Dedong He,Rongtao Li
Sn modified CuO–CeO 2 catalysts with different Sn loadings were prepared by a facile, green and solvent-free method. The effect of Sn/Ce ratio over Sn–Cu–Ce-x (x = 0, 1, 2.5, 5, 7.5) samples on CO activity and O 2 selectivity was investigated. The samples were characterized by various techniques using N 2 -adsorption/desorption, XRD , H 2 -TPR, XPS, Raman and in-situ DRIFTS . It was revealed that stronger interaction between acitve sites and support, higher amounts of Sn 2+ and Ce 3+ , associated with increased amount of oxygen vacancies , were observed on the catalyst of Sn–Cu–Ce-5. As a result, the optimized catalyst displayed an excellent catalytic performance even in the presence of CO 2 and H 2 O. In this sense, probing the Sn modified CuO–CeO 2 catalyst can elucidate some useful keys for the development of high CO 2 and H 2 O-resistance catalyst during CO-preferential oxidation in H 2 -rich streams.
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THIN SOLID FILMS
·
2017
·
IF 1.879
Furao Guo,Huafei Guo,Kezhi Zhang,Ningyi Yuan,Jianning Ding
SnS films with different Sn contents were fabricated by thermal co-evaporation. The variation in structures, optical and electrical properties of SnS with different Sn contents was systematically investigated. The prepared films were characterized by X-ray diffraction, field emission scanning electron microscopy , and energy dispersive spectroscopy analysis. An excess of Sn can result in a change of the SnS semiconducting film from p-type to n-type. The SnS films showed band gaps in the range of 1.25–1.57 eV and high mobilities of 7.29 cm 2 /V ∙ s, indicating suitability for application in photovoltaic cells . The photoelectric conversion efficiency (PCE) of the heterojunction solar cell was 1.26% with a open circuit voltage ( V OC ) of 0.153 V and a short circuit current density ( J SC ) of 29.61 mA/cm 2 .
研究领域:
材料科学
·
薄膜技术
·
光伏学
·
半导体物理
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高影响因子
Nano Select
·
2021
·Vol. 2
·期 3
·642-653
·
IF 0
Xiaoyan Wang,Tianle Zheng,Ya-Jun Cheng,Shanshan Yin,Yonggao Xia,Qing Ji,Zhuijun Xu,Suzhe Liang,Liujia Ma,Xiuxia Zuo,Jian-Qiang Meng,Jin Zhu,Peter Müller-Buschbaum
Ultrafine SnO 2 /Sn nanoparticles encapsulated into the adjustable mesoporous carbon matrix has been successfully fabricated by a facile route. The mesoporous carbon effectively improve the conductivity of the SnO 2 /Sn, prevent the aggregation, accommodate the strain of volume change and provide high interface area with the electrolyte, thus resulting in excellent cycling performance. A reversible capacity of 1105 mAh g –1 still retained after 290 cycles at 200 mA g –1 , and the capacity still can keep at 107 mAh g –1 at high current density of 10 A g –1 . The porous structures by the in situ SiO x template provide an appropriate specific surface area, which contributes to a relatively high capacitive contribution.
研究领域:
材料科学
·
能源技术
·
纳米技术
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 2
·1186-1197
·
IF 4.682
Li Yana,Li Yuqiang,Ji Yi,Wang Hong,Zhong Dingyong
Ga 2 O 3 is considered as a candidate for the preparation of solar-blind photodetectors due to its large direct band gap. Developing low-cost preparation methods of high-quality Ga 2 O 3 films is of importance for large-scale applications. In this work, we investigate the preparation of Sn doped β-Ga 2 O 3 films by using simple and cheap sol–gel method under ambient condition. It is found that Sn doping induces a growth mode transformation from \(\left( {\overline{2}01} \right)\) to \(\left( {\overline{3}11} \right)\) oriented texture on the c-plane sapphire substrates. With an optimal Sn proportion, high-quality β-Ga 2 O 3 films consisting of needle-like grains are observed. Compared with the undoped films, the Sn-doped films with needle-like grains obtained a low dark current of 0.76 nA, performed an on/off ratio as high as ~ 6000, responsivity, R of 164 mA/W and D* of 3.21 × 10 12 Jones at a bias voltage of 30 V in the configuration of metal–semiconductor–metal solar-blind deep ultraviolet detectors. This is the highest on/off ratio of Ga 2 O 3 solar-blind photodetectors fabricated by sol–gel method reported up to now and has the potential to be applied in practical use. Graphical abstract
研究领域:
材料科学
·
半导体物理
·
光电技术
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Solar RRL
·
2022
·Vol. 6
·期 10
·2200398
·
IF 9.173
Lu Pan,Hui Li,Bohong Chang,Longwei Yin
Low bandgap tin–lead halide perovskite (PVSK) presents promising opportunities for high-performance solar cells. However, the randomly crystallized Sn–Pb PVSK with a tin-rich surface is easily oxidized, leading to high-level p-type doping, which hinders the performance enhancement of the solar cell devices. Herein, an efficient anti-solvent passivation strategy to regulate defect, crystallization, and energy conversion performance based on anti-solvents composed of chlorobenzene, isopropanol, and methylammonium chloride (MACl) is proposed. It is shown that the Sn–Pb PVSK film gets more moderate and order, with less PbI 2 and more α-phase PVSK formed. Furthermore, it is revealed that the surface of the as-processed film is Pb-rich, demonstrating a decrease in the surface p-type concentration, which is more suitable for the photoelectric conversion enhancement of the inverting device. Finally, the MACl-assisted post-treated Sn–Pb PVSK invert solar cells exhibit a high current density of 26.49 mA cm −2 with a open-circuit voltage of 0.70 V and a power conversion efficiency of 16.05%. The modified anti-solvent process fuses the advantage of additive and anti-solvent engineering for growing highly crystallized hybrid tin-lead halide PVSK for photovoltaic devices.
研究领域:
材料科学
·
光伏技术
·
太阳能
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Nature Communications
·
2026
·
IF 18.1
Wang Xinhao,Wu Zelin,Huang Bingkun,Yang Lei,Tian Tao,Li Xuning,Xiong Zhaokun,Lai Bo
Selective oxidation-driven pollutant polymerization enables simultaneous contaminant removal and carbon recovery, yet current catalysts suffer from competitive adsorption between pollutants and oxidants, disrupting redox balance and causing premature termination. Herein, we present a microenvironment-decoupled strategy by anchoring atomically dispersed Sn on amino-functionalized carbon nanotubes (CNT−NH 2 ). Amino preferentially stabilizes Sn as Sn(II)−N 4 , which selectively activates peroxydisulfate (PDS) by forming a bidentate Sn–PDS complex and sustains an electron-transfer-dominated pathway. Meanwhile, the carbon surface enriches phenolic substrates and sustains their para -C–O polymerization transfer. In situ spectroscopy and density functional theory identify Sn 5 p –O 2 p interactions as the origin of this unique selectivity. As a result, the SnPc/CNT−NH 2 /PDS system maintains over 95% phenol removal after five cycles (versus one cycle for CNT) and achieves ~82% total organic carbon removal (versus ~46% for CNT). A decoupled reactor further demonstrates the practical feasibility of this mechanism for continuous water purification. This work provides a microenvironment-decoupled paradigm for precise oxidation regulation toward sustainable pollutant polymerization transfer in water purification.
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PubMed
高影响因子
Journal of Energetic Materials
·
2026
·
IF 1.8
Mingzhu Guo,Zhongyuan Zhang,Zhijiang Jin,Chunlong Huangfu,Xinyu Yang,Hongyan Qu,Zhiyi Li,Feng Luo,Qian Gao
Aluminum powder, a common metallic fuel for propellants and explosives, is limited by high ignition temperatures, incomplete combustion and particle agglomeration. To mitigate these drawbacks, we synthesize core–shell Al–In–Sn ternary alloy fuel by facile melt casting. Eutectic phase separation drives spontaneous formation of an InSn₄ protective shell on Al particle surfaces. The InSn₄ shell functions as a passivation barrier at low temperatures to inhibit premature oxidation and guarantee storage stability. Upon heating above 250 °C, thermal expansion mismatch ruptures the molten shell, exposing active Al and triggering strong exothermic oxidation. The optimized 80Al–In–Sn sample exhibits an oxidation heat release of 1220 J/g (11.5-fold higher than pristine Al), a mass gain efficiency of 76.3%, and reduced activation energy (242.9 kJ/mol by Kissinger method versus 403 kJ/mol for pure Al), verifying greatly enhanced reactivity. Combined DSC and XRD results reveal the temperature-controlled oxidation mechanism. This work offers guidelines for designing storable, highly reactive alloy fuels and facilitates their engineering applications within energetic materials.
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产品关联
DOI
高影响因子
Molecular Catalysis
·
2026
·
IF 4.3
Zhouxuan Zang,Feifan Zheng,Buliang Xu,Bolun Mei,Ouyang Liu,Yi Yu,Chunmei Cao,Li Xu
A MgAlSnO spinel oxide catalyst with exceptional water tolerance was developed for efficient aqueous-phase C–C coupling of biomass-derived molecules. • The electronic environment of Sn was precisely regulated by calcination temperature, enabling controllable modulation of its p-band center. • In situ DRIFTS revealed that water dissociation is a critical elementary step governing catalytic performance under high water content. • A linear correlation between catalytic activity and the Sn p-band center was established, identifying it as an effective descriptor for water dissociation. • DFT calculations demonstrated that Sn 5p–O 2p orbital hybridization dominates the adsorption and dissociation of water on Sn-based oxides. The development of heterogeneous catalysts for aqueous C–C coupling offers a more promising solution for converting biomass-derived molecules into sustainable bio-jet fuel. This study systematically investigated catalytic activity of layered double hydroxide-derived oxides for furfural (FF) aqueous C–C coupling. MgAlSnO-600 catalyst exhibited superior water tolerance, achieving 95% conversion of furfural (FF) under high-water-content conditions and demonstrating broad substrate generality. In situ DRIFTS and water contact angle measurements reveal that efficient H 2 O dissociation, rather than suppressed water adsorption, is the key factor enabling high catalytic activity under water-rich conditions. Density functional theory (DFT) calculations reveal that the strength of p-p orbital hybridization between Sn 5p and O 2p (H 2 O) orbitals governs the water dissociation rate and determines the catalytic performance. Furthermore, the high linear correlation of the Sn p-band center with both the water dissociation rate and catalytic activity establishes it as a reliable descriptor. This study establishes a scalable heterogeneous catalyst framework enabling the conversion of furfural to fuel precursors in aqueous systems, paving a new pathway for aqueous C–C coupling. The dissociation of H 2 O at Sn sites enables the catalyst to achieve excellent water-poisoning resistance and efficient aqueous-phase C-C coupling. Download: Download high-res image (135KB) Download: Download full-size image
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ChemCatChem
·
2026
·Vol. 18
·期 9
·e70761
·
IF 4.1
Mengdie Cai,Yulu Xu,Yao Lu,Qi Jin,Yongshuai Chen,Jia-qi Bai,Fang Chen,Zhimin Song,Song Sun
Developing efficient visible-light-driven photocatalysts for overall water splitting remains a significant challenge. Herein, Sn/Cr co-doped SrTiO 3 (SCSTO) was synthesized via a flux-assisted solid-state reaction, with Sn substituting Sr sites and Cr replacing Ti sites in the perovskite lattice. Sn/Cr synergistic co-doping extends optical absorption into the visible region, narrows the bandgap to 3.04 eV, suppresses Ti3+ defects and oxygen vacancies, and promotes charge separation and migration. Benefiting from the rational band structure and defect engineering, under visible-light irradiation (λ > 380 nm), the optimal SCSTO exhibits a hydrogen evolution rate of 15.4 µmol·h − 1 and oxygen evolution rate of 7.34 µmol·h −1 , with outstanding cycling stability. DFT calculations confirm that Cr 3d mid-gap states below the Ti 3d conduction band enhance visible-light response and charge transfer. This work provides a universal and feasible co-doping strategy for designing high-performance perovskite oxide photocatalysts toward efficient solar fuel production, which is instructive for the development of advanced visible-light-driven photocatalytic systems. Graphical A synergistic Sn/Cr dual-site co-doping strategy was developed for SrTiO 3 to enable efficient visible-light-driven overall water splitting.
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高影响因子
Journal of Materials Research and Technology-JMR&T
·
2026
·
IF 7.3
Yunjia Hu,Renli Fu,Zeya Huang,Meng Meng,Jindan Tian,Xing Gao,Yunan Liu
This study developed a soldering process for joining Al to Cu-metallized ceramic substrates, aiming to overcome the formation of brittle intermetallic compounds in Sn-based solders, which usually lead to low joint strength. Zn foils coated with Sn-10Zn or Sn-20In solders were used as hybrid solders to bond Ni-plated Al components to Cu-metallized Al 2 O 3 substrates at 220 °C. With increasing soldering time, the solder on the Zn surface gradually transformed into NiZn 3 , and the formation mechanism of the NiZn 3 phase was analyzed from thermodynamic and kinetic perspectives. The shear strength of the joints increased with prolonged soldering times, reaching a maximum of 67 MPa for the Sn-10Zn/Zn solder at 240 min. In the Sn-10Zn joints, NiZn 3 formed a continuous transition layer that effectively reduced stress concentration. In contrast, the Sn-20In/Zn joints showed discontinuous NiZn 3 layers and significant interfacial stress, resulting in lower shear strength.
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CARBON
·
2026
·
IF 12.7
Yanjun Jiang,Shuai Lv,Baoshan Li,Zihao Zhao,Xinyu Wang,Junjie Fu,Jingyu Wang,Yangzhaohua Sun,Yiming Liu,Dongdong Lv,Yanan Yang,Long Xia
To address the insufficient broadband coverage of conventional microwave absorbing materials, a high-performance absorber is developed through a synergistic strategy integrating microscopic component regulation and macroscopic structural design. Sn particles are uniformly anchored onto graphene oxide (GO) using cetyltrimethylammonium bromide (CTAB) as a charge mediator, constructing pod-like bionic micro-absorbing units. Subsequent heat treatment under an inert atmosphere induces the in-situ formation of a GO@Sn/SnO 2 multi-heterolayer structure. The optimized SG-3 sample exhibits a minimum reflection loss of −59.22 dB and a maximum effective absorption bandwidth of 5.49 GHz. To overcome the bandwidth limits of planar absorbers, a turtle shell-inspired metamaterial superstructure was designed to strengthen multi-reflection and structural resonance. Combining the optimized material with this bio-inspired structure, the composite absorber breaks the bandwidth constraints of the Planck-Rozanov limit and realizes 16 GHz broadband absorption in 2-18 GHz. At r1 = r2 = 6 mm, h1 = 8 mm, h2 = 12 mm, the absorber exhibits a 14.56 GHz effective bandwidth with strong absorption peaks in the S, C, X, and Ku bands, and a maximum reflection loss of −52.88 dB. This work provides a feasible strategy for high-performance broadband microwave absorbers.
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