Advanced Materials Technologies
·
2024
·Vol. 9
·期 9
·2302029
·
IF 6.4
Can Gao,Xinyao Wang,Qingyun Yang,Xiaochun Wang,Chunxiao Gao,Xizhe Liu
Hybrid tin halides with formamidinium cations become a promising candidate for eco-friendly solar cells, which achieves the best photovoltaic performance among various lead-free perovskite solar cells (PSCs). Unfortunately, the low quality of perovskite layers and the oxidation of Sn 2+ ions degrade the performance of devices, leading to an obviously lower power conversion efficiency (PCE) compare to hybrid lead halides. Additive engineering is a facile strategy for improving the quality of perovskite layers. In this work, the 2-aminopyrazine (APZ) additive is investigated for depositing FA 0.8 PEA 0.2 SnI 2.8 Br 0.2 layers, and corresponding PSCs are examined. It is found that the melting point of APZ additives drops below the annealing temperature of perovskite layers by the intermolecular interaction with formamidinium iodide (FAI). The melt phase at the grain boundaries encourages the diffusion of ions in the annealing process, leading to an improved quality of perovskite layers. And the formation of APZ-SnI 2 complex also inhibits the oxidation of Sn 2+ ions. Consequently, the defect density and the recombination are significantly reduced in PSCs, resulting in an increase of PCEs from 11.4% to 13.0% and a simultaneous improvement of device stability. This work demonstrates a strategy for improving tin-based PSCs based on melt assisted annealing and coordination interaction.
研究领域:
材料科学
·
可再生能源
·
太阳能电池技术
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·Vol. 45
·期 15
·117636
·
IF 6.2
Shaoqing Lu,Shengmao Sha,Jian Wang,Lulu Huang,Yu Liu,Jian Yan,Yucheng Wu
PbSe is a promising thermoelectric (TE) material with excellent carrier transport properties and an economic advantage due to the lower cost of selenium compared to tellurium, making it a potential alternative to PbTe. Improving its TE performance through dual-element doping represents a widely employed approach. In this study, the TE properties of n-type PbSe are improved through the simultaneous incorporation of Sn and Cu into the PbSe matrix. By precisely controlling the Pb content, we enable Sn dopants to occupy both interstitial sites and substitutional Pb positions, thereby significantly enhancing electrical conductivity . Meanwhile, interstitial Cu exhibits a temperature-dependent dissolution-precipitation behavior, dynamically turning the carrier concentration and improving electrical transport properties. The dual-doping strategy also introduces abundant point defects , effectively scattering phonons and reducing the lattice thermal conductivity . As a result, the electrical transport properties of the co-doped Pb 0.99 Sn 0.01 Se-0.7 %Cu sample are further improved by Pb regulation, achieving a power factor of 24.2 mW cm⁻¹K⁻² and a peak zT value of 1.80 at 728 K. These results demonstrate the effectiveness of the Sn and Cu co-doping approach in enhancing the TE performance of PbSe, offering promise for the development of cost-effective and high-performance TE materials.
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DOI
高影响因子
Small
·
2026
·
IF 11.8
Qian Ning,Chengcheng He,Xiaolin Xue,Yan Zhang,Longqing Zhang,Yuhong Liang,Yang Ren,Jing Xu,Xucai Yin
The two-electron oxygen reduction reaction (2e − ORR) provides a sustainable route for green hydrogen peroxide (H 2 O 2 ) synthesis, but the development of p -block metal catalysts that combine high activity with long-term stability remains challenging. Herein, we propose a hierarchical core-shell catalyst, SiO 2 @C/Sn. Mesoporous silicon dioxide (SiO 2 ) serves as a rigid confinement scaffold to effectively suppress the migration and aggregation of Sn nanoparticles. Simultaneously, a conductive carbon layer was in-situ formed on the SiO 2 surface, markedly enhancing interfacial charge transport. Importantly, the interfacial electronic structure of the Sn nanoparticles is moderately tuned by the combined effect of SiO 2 confinement and the continuous electronic interface provided by the carbon layer, thereby maintaining an optimal adsorption-desorption balance for the *OOH intermediate and significantly improving selectivity toward the 2e − pathway. SiO 2 @C/Sn achieves H 2 O 2 selectivity exceeding 97% and a production rate of 16.15 mol·g − 1 ·h − 1 in alkaline media, while 80% selectivity with a yield of 8.13 mol·g − 1 ·h − 1 in neutral media. The catalytic activity shows almost no decay after 100 h of continuous operation. In-situ spectroscopies combined with DFT calculations further reveal that polarization coupling at the SiO 2 -carbon interface induces electronic redistribution that optimizes the electronic states of Sn sites and thereby stabilizes the 2e − reaction pathway.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2017
·Vol. 47
·期 1
·96-102
·
IF 1.579
Wang Yan,Han Jing,Wang Yishu,Ma Limin,Guo Fu
With a body-centered tetragonal crystal structure, Sn grains were demonstrated to have highly anisotropic behaviors in various properties. The electromigration behavior of lead-free solder was impacted by the grain orientations. In this paper, the angle between the c -axis and the electron flow direction in composite solder joints (angle θ ) was proven to be an important factor during electromigration. The effects of angle θ on the electromigration of composite solder joints were investigated in this paper. Cu particle-reinforced Sn3.5Ag solder joints were stressed under a current density of 10 4 A/cm 2 at room temperature. After 336 h current stressing time, different electromigration phenomena occurred at the two sides of the grain boundary in the composite solder joint which contained two Sn grains with different angle θ . The Sn grains with the larger angle θ had a smaller growth rate of Cu 6 Sn 5 . In addition, a composite solder joint with a single Sn grain was set as the contrast and its angle θ was smaller than that of the composite solder joint with two Sn grains. The growth rate of Cu 6 Sn 5 in the composite solder joint with a single grain was faster than that of the composite solder joint with two Sn grains.
研究领域:
材料科学
·
电子封装
·
可靠性工程
·
金属间化合物
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DOI
高影响因子
CATALYSIS TODAY
·
2015
·
IF 3.893
Yanjie Wang,Yanjie Zhang,Fuhai Yu,Changzi Jin,Xin Liu,Jingyuan Ma,Yu Wang,Yuying Huang,Junhu Wang
Rutile Sn-Fe-TiO 2 photocatalysts with high visible-light-driven activity were synthesized by an improved soft chemical solution process for investigating the potential correlation between their photocatalytic performance and coordination structure. The prepared photocatalysts were systematically characterized by XRD, BET, Raman, TEM, UV–vis, XPS, XAFS and Mössbauer techniques. Their photocatalytic performances were evaluated by degrading the model pollutant of methylene blue aqueous solution under visible light irradiation ( λ ≥ 400 nm). The results indicated that tin and iron ions could substitute Ti 4+ in the rutile TiO 2 lattice, and specially, iron ions were located at tetrahedrally coordinated titanium sites. Their visible-light-driven photocatalytic activities were found to culminate at a very low level of iron doping (Fe/Ti = ∼0.1 at.%, Sn/Ti = 2.0 at.%), this was 5-fold of P25 and 2-fold of undoped rutile TiO 2 . It was confirmed that besides the high surface area, fine crystallinity, enhanced visible light absorption and optimized oxygen vacancy concentration, the mole ratio of tetrahedrally coordinated iron and titanium was also essential to modify their visible-light-driven photocatalytic properties.
研究领域:
材料科学
·
环境化学
·
纳米催化
·
表面科学
·
无机化学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 6
·期 2
·434-442
·
IF 8.867
Kangsheng Huang,Zheng Xing,Liancheng Wang,Xuan Wu,Wei Zhao,Xiujun Qi,Hong Wang,Zhicheng Ju
It has been approved that embedding potassium ions into graphitic carbon interlayer is possible. The intercalation of potassium ions into graphite has been demonstrated feasible while the electrochemical performance of potassium ion battery (PIB) is still unsatisfying. Herein, an in situ formed NaCl serving as hierarchical templates and supporting the formation of 3D polymer–Sn complex is reported. The polymer–Sn complex is heat-treated to obtain a 3D Carbon/Sn network constructed by porous films. In particular, the large specific surface area of the composite and the Sn nanoparticles homogeneously embedded in 3D hierarchically porous carbon shells result in an excellent potassiation/depotassiation performance. Under the optimal conditions (650 °C), the 3D hierarchically porous carbon/Sn composite (3D-HPCS) as an anode material of PIBs demonstrates a high reversible capacity of 276.4 mA h g−1 at 50 mA g−1 (100 cycles) with coulombic efficiency of over 96%. This interesting method can provide new avenues to other high-capacity anode material systems that are subject to significant volume expansion.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米复合材料
·
电池技术
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DOI
高影响因子
BIOMASS & BIOENERGY
·
2026
·
IF 7
Weijie Shen,Li Dong,Shuoqi Pei,Guoqiang Ding,Shanhui Zhu,Yueqing Wang,Guangping Lei,Yulei Zhu
Tandem isomerization and decarbonylation increased furfural yield from 34.4% to 67.9%. • Framework Sn location was governed by T-vacancy distribution in dealuminated H-beta. • Open Sn sites at pore mouths improved furfural selectivity. The asymmetric C-C bond scission of C6 glucose to C5 furfural via a “C5 + C1” retro-aldol pathway represents a promising and important route for the valorization of bio-based sugar resources. However, this transformation still faces major challenges in achieving high selectivity and efficiency, as stable glucopyranose tends to undergo side reactions leading to oligomeric humins. In this work, to enhance furfural yield, Sn atoms were incorporated into the framework of dealuminated H-beta zeolite to construct synergistic active sites for coupling isomerization and decarbonization reactions. The catalytic performance was found to be highly sensitive to the type, spatial location, and coordination environment of framework Sn species. Based on Low-Energy Ion Scattering (LEIS) and X-ray absorption fine structure (XAFS) results, it is demonstrated that open Sn sites located at the pore mouths of H-beta zeolite are conducive to the conversion of glucose into furfural via coupled isomerization-decarbonization pathways. Accordingly, Sn-Al-beta-C, which possesses the highest proportion of open Sn sites, achieves the highest furfural yield of 67.9% at nearly complete glucose conversion, markedly outperforming H-beta (34.4%) and the corresponding physical mixtures. The ratio of open to closed Sn sites can be regulated by controlling the deposition of Sn (IV) species at the pore mouths of H-beta zeolite. The results of this work demonstrate the feasibility of constructing metal–acid bifunctional sites for the direct conversion of glucose to furfural and provide valuable insights for the rational design of efficient metal-modified zeolite catalysts.
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Junhua Zhou,Yizhou You,Xueyu Lian,Qitao Shi,Yu Liu,Xiaoqin Yang,Alicja Bachmatiuk,Lijun Liu,Jingyu Sun,Ruizhi Yang,Jin-Ho Choi,Mark H. Rümmeli
Although anodes based on Sn alloys (SnX) such as SnO 2 , SnS, and Sn 4 P 3 may be used to increase the gravimetric and volumetric energy densities of existing lithium-ion batteries, the further development of these anodes is hindered by their complex reaction mechanisms , sluggish conversion, and the occurrence of undesired reactions. Herein, we probe the mechanisms of the incompletely reversible reactions of SnO 2 and SnS using analytical and electrochemical techniques and demonstrate that the capacity retention of these species can be further increased using coordination atom regulation and hybridization with carbon. The superior cyclability (sustainable operation for >500 cycles) of the optimized SnS/C composite is attributed to its reinforced conversion and alloying reactions resulting from enhanced bulk structure, higher interface stability, and accelerated kinetics. This work also provides guidance for the development of other alloy-based anode materials , especially regarding the choice of coordination atoms and the understanding of the role of carbon coatings in property optimization.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Chaoye Zhu,Yao Zhang,Ziqiang Wu,Zhihong Ma,Xinli Guo,Fuyi Guo,Jiakun Zhang,Yushu Li
Both silicon and tin are promising anodes for new generation lithium ion batteries due to high lithium storage capacities (theoretically 4200 mA h g −1 and 992 mA h g -1 , respectively). However, their large volumetric expansions (both are above 300 %) usually lead to poor cycling stability. In this case, we synthesized closely packed Si@C and Sn@C nano-particles anchored by reduced graphene oxide (denoted as Si@C/Sn@C/rGO) by the way of solution impregnation and subsequent hydrogenation reduction. Sn particles with a diameter of 100 nm are coated by carbon and surrounded by Si@C particles around 40 nm in average diameter through the high-resolution transmission electron microscopy. Expansions of Si and Sn are alleviated by carbon shells, and reduced graphene oxide sheets accommodate their volume changes. The prepared Si@C/Sn@C/rGO electrode delivers an enhanced initial coulombic efficiency (78 %), rate capability and greatly improved cycle stability (a high reversible capacity of nearly 1000 mA h g −1 is achieved after 300 cycles at a current density of 1000 mA g −1 ). It can be believed that packing Sn@C nano-particles with Si@C relieves the volume expansion of both and releases the expansion stresses. Sn@C particles enhance anode process kinetics by reducing charge transfer resistance and increasing lithium ion diffusion coefficient . The present work provides a viable strategy for facilely synthesizing silicon-tin-carbon composite anode with long life.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 47
·19296-19306
·
IF 5.7
Tao Huan,Jingxuan Yin,Yu Shen,Jingxin Lu,Chengwei Gao,Yongxing Liu,Shixun Dai,Changgui Lin,Xianghua Zhang,Hongli Ma,Xiang Shen,Qing Jiao
All-solid-state sodium-ion batteries are emerging as a highly promising substitute for lithium-ion batteries, primarily owing to their rich natural resources and superior safety performance. Solid electrolytes are integral components of all-solid-state batteries and have attracted much attention due to their remarkable safety and chemical stability. This study examines a novel solid electrolyte Na3(WSn)xSb1−2xS4 by modifying the W/Sn ratio and achieves a high ionic conductivity of 11.3 mS cm−2 at room temperature. Structural analysis demonstrates that the inclusion of tungsten facilitates the formation of cubic phase Na3SbS4 by more sodium vacancies. Furthermore, the co-dopant Sn ensures pure cubic conductors by removing impurities WS2 and increasing the element solubility. This efficiently enhances the movement of sodium ions and promotes ion transportation. The W/Sn-optimized Na3SbS4 (NBS) electrolyte also exhibited stable cycling for about 323 hours, which is about eight times longer than the Na3SbS4 base electrolyte. The efficient enhancement of the critical current density demonstrated the improvement of the structural stability at the interface where sodium dendrites formed easily. The formed Na–Sn alloy provides a protective barrier for the normal transport of ions. In addition, the small release of H2S also proves the stability of the electrolyte structure. These characteristics make it a highly promising electrolyte material for all-solid-state electrolytes.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态离子学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Hongying Liu,Cairui Zhang,Chenwei Wang,Kai Fan,Yuqing Zhang,Lu Fang,Lihua Li,Chaoxiang Ren,Zheng-Zhi Yin,Zhong Lü
Promethazine (PMZ) is an effective antihistamine that is used as a nerve tranquilizer to treat mental disorders. However, drug abuse causes harm to the human body and also pollutes the environment to a certain extent. Therefore, it is crucial to develop a highly selective and sensitive biosensor for PMZ determination. An acupuncture needle (AN) was used as an electrode in 2015, and further research on the electrode's essence in electrochemistry is needed. In this work, a sensor based on a surface imprinted film coordinated Au/Sn biometal was first fabricated on AN via electrochemistry. The obtained cavities showed complementary and suitable sites for “N atom” electron transfer through the phenyl ring structure in promethazine, which is rigorous for the configuration near the interface. Under the optimal conditions, MIP/Au/Sn/ANE exhibits a good linear relationship in the range of 0.5 μM–500 μM, and the detection limit (LOD) is 0.14 μM (S/N = 3). The sensor exhibits good repeatability, stability, and selectivity and can be successfully used to analyze and detect PMZ in human serum and environmental water. The findings are scientifically significant for AN electrochemistry and the sensors have potential for in vivo medicamentosus monitoring in the future.
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产品关联
DOI
PubMed
高影响因子
Food Bioscience
·
2023
·
IF 5.2
Xiao-Jian Zhang,Bao-Juan Dou,Yu-Qi Wang,Fei Yang,Xue Cai,Mian Li,Zhi-Qiang Liu,Yu-Guo Zheng
Functional sugar alcohols are a kind of burgeoning food additives to substitute saccharose due to the prominent biofunctions including moderate sweetness, low calorific values and no influence on blood sugar fluctuation, thus applied widely in food, medical, health protection as well as chemical production. Traditional synthesis of functional sugar alcohols required high temperature and H 2 pressure, as well as leading to low reaction efficiency, side reactions and leaching of toxic metal ions. In the present work, Pt–Ni–Sn/MWCNTs catalyst was obtained using a liquid phase reduction method with the transition metals loading of Pt 3.4%, Ni 0.7%, Sn 0.4%, respectively. The catalyst catalyzed the preparation of xylitol , sorbitol , mannitol and galactitol with the high monosaccharide conversion (>99.5%) and yield (>99.1%) under relatively mild conditions (100 °C, 3.0 MPa H 2 ), which were lower than ever reported. For the 13-batch reuse of Pt–Ni–Sn/MWCNTs, the total conversion of xylose was 99.4% and the total yield of xylitol was 99.2%, the productivity of 103.2 g xylitol per gram of catalyst was also obtained. Besides, no side reactions, no metal ions as well as no changes of pH were observed in the reaction process. Our trimetallic catalyst exhibited valuable potential in functional sugar alcohols production.
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DOI
高影响因子
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