Energy & Environmental Materials
·
2021
·Vol. 5
·期 1
·353-359
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IF 15.122
Xingyang Du,Hanying Zhang,Xuexia Lan,Bin Yuan,Renzong Hu
Silicon monoxide (SiO) has aroused increased attention as one of the most promising anodes for high-energy density Li-ion batteries. To enhance the initial Coulombic efficiencies (ICE) and cycle stability of SiO-based anodes, a new facile composition and electrode design strategy have been adapted to fabricate a SiO–Sn–Co/graphite (G) anode. It achieves a unique structure where tiny milled SiO–Sn–Co particles are dispersed among two graphite layers. In this hybrid electrode, Sn–Co alloys promoted Li + extraction kinetics, and the holistic reversibility of SiO and graphite enhanced the electrical conductivity. The SiO–Sn–Co/G electrode delivered an average ICE of 77.6% and a reversible capacity of 640 mAh g −1 at 800 mA g −1 , and the capacity retention was above 98% after 100 cycles, which was much higher than that of the SiO with an ICE of 55.3% and a capacity retention of 50%. These results indicated that this was reliable method to improve the reversibility and cycle ability of the SiO anode. Furthermore, based on its easy and feasible fabrication process, it may provide a suitable choice to combine other alloy anodes with the graphite anode.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 6
·e5612
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IF 3.14
Na Zhang,Jiaqi Bu,Yong Meng,Jia Wan,Lu Yuan,Xin Peng
In this study, Ti-Si-Sn-Sb/GAC particle electrodes were prepared by sol–gel method. The particle electrodes were characterized by SEM, XRD, EDX, and BET then used to carry out three-dimensional (3D) electrocatalytic oxidation degradation on simulated refractory p-aminophenol (PAP) wastewater. The effects of initial pH, cell voltage, aeration flow rate and initial PAP concentration on degradation experiments were investigated. Under the optimal conditions, the PAP and COD removal rates were 89.45% and 75.17% respectively. In addition, the possible degradation mechanism of PAP was further investigated by UV–Vis and HPLC. Finally, it was found that the Ti-Si-Sn-Sb/GAC particle electrodes with high catalytic activity and excellent stability could significantly improve the PAP wastewater removal efficiency.
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Catalysis Science & Technology
·
2020
·Vol. 10
·期 9
·2986-2993
·
IF 5.721
Wenda Hu,Zixin Chi,Yan Wan,Shuai Wang,Jingdong Lin,Shaolong Wan,Yong Wang
This work presents a novel method to selectively convert levoglucosan to lactic acid (LA) via initially adding LA as the Brønsted acid together with modified Sn-β as the Lewis acid. Sn-β catalysts exchanged with various cations significantly enhance the yield of LA, following the order Sn-β < Sn-β–Na < Sn-β–K < Sn-β–Mg, Sn-β–Ca. The role of exchanged alkali ions stems from removing the remaining Brønsted acid sites in the zeolite and tuning the framework oxygen with more Lewis base sites. The exchange with alkaline earth cations such as Ca2+ and Mg2+ appears to be more effective in promoting the retro-aldol condensation due to the synergetic effect of their stronger Lewis acid that can stabilize the oxygen atom of deprotonated alkoxides during the reaction. The LA yield from levoglucosan can reach up to 66% on Sn-β–Ca under the optimized conditions. We also demonstrated that such a synergetic effect of alkaline-earth ion exchanged Sn-β shows great universality toward enhanced retro-aldol condensation, which can significantly promote the yield of methyl lactate over glucose conversion in methanol solvent.
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ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Wangen Zhao,Gang Wang,Qingwen Tian,Yanchun Yang,Lijian Huang,Daocheng Pan
Cu2ZnSn(S,Se)4 semiconductor is a promising absorber layer material in thin film solar cells due to its own virtues. In this work, high quality Cu2ZnSn(S,Se)4 thin films have been successfully fabricated by an ethanol-based sol–gel approach. Different from those conventional sol–gel approaches, SnS2 was used as the tin source to replace the most commonly used SnCl2 in order to avoid the possible chlorine contamination. In addition, sodium was found to improve the short-circuit current and fill factor rather than the open-circuit voltage due to the decrease of the thickness of small-grained layer. The selenized Cu2ZnSn(S,Se)4 thin films showed large densely packed grains and smooth surface morphology, and a power conversion efficiency of 6.52% has been realized for Cu2ZnSn(S,Se)4 thin film solar cell without antireflective coating.
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PubMed
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SURFACE & COATINGS TECHNOLOGY
·
2017
·
IF 2.589
K.Q. Song,Z.C. Lu,M. Zhu,R.Z. Hu,M.Q. Zeng
Nanocomposite Al–Sn-based bearing alloys produced by mechanical alloying (MA) exhibit high hardness; however, their poor sintering density and ductility limit their wide spread application. Here, we present a strategy to produce a dual-scale structure in an Al–Sn–Si alloy consisting of coarse and ultrafine grains through a combination of conventional powder sintering and thermomechanical treatment . We found that severe deformation and the presence of an Al–Si eutectic mixture for sample induced abnormal grain growth of Al to create the dual-scale Al–Sn–Si alloy through annealing treatment. An optimum matching of ductility and strength , and optimum wear performance were achieved at annealing temperatures of 500 and 550 °C. Detailed investigation of the wear mechanism revealed that the combination of high strength and high ductility provided by the dual-scale structure is a key factor for the improvement of the wear properties.
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Drug Delivery and Translational Research
·
2024
·
IF 5.7
Hou Xuyang,Wei Zuxing,Qi Xiaoyan,Liu Dekun,Sun Yin,Jiang Yuhong,Liu Chao,Zhou Weihan,Yang Leping,Liu Kuijie
SN-38 is the active metabolite of irinotecan and acts as an effective topoisomerase I inhibitor with therapeutic effects on many malignant tumors, including some drug-resistant cancers. However, the poor solubility, low bioavailability, and severe dose-dependent toxicity limits the clinical application of SN-38. Currently, emerging macrophage membrane-coated nanoparticles provide an efficient biomimetic approach to develop novel SN-38 formulations for the reduction of its side effects. Photothermal therapy (PTT) is a promising methods in tumor treatment to thermally ablate tumors using various materials such Prussian blue nanoparticles (NPs) and can combined with chemotherapy to synergistically work. There is no report that combined SN38 and photothermal therapy for the treatment of colorectal cancer (CRC). SN38-PB@CM NPs were constructed by loading SN-38 into macrophage cell membrane-coated hollow mesoporous Prussian blue (PB) NPs. The morphology, size and zeta potential were evaluated by transmission microscopy and dynamic light scatter (DLS). Coomassie bright blue staining was performed to assess total protein profile. The photothermal properties of it were also investigated via near-infrared imaging. CCK8 and calcein-AM/PI staining were used to evaluate cell viability. Flow cytometry was performed to assess cell apoptosis. The fluorescent microscopy was used to observe cellular uptake of SN38-PB@CM NPs to assess its internalization in vitro. The biodistribution, tumor-targeting efficacy, antitumor efficacy and safety of SN38-PB@CM NPs in vivo were assessed in CT26 tumor-bearing mice via In Vivo Imaging System. SN38-PB@CM NPs were successfully constructed and exhibited a uniform size distribution (140.5 ± 4.3 nm) and an excellent drug-loading capacity (5.61 ± 0.64%). SN38-PB@CM NPs showed stable release properties within 72 h. It can also enhance the selective intracellular delivery of SN38 in vitro and showed good near-infrared (NIR) photothermal properties. And the NPs showed excellent tumor targeting, effective photothermal therapy, improved biosafety and antitumor efficacy on CT26-bearing mice. Multifunctional SN38-PB@CM NPs could achieve improved biosafety, great tumor-targeting, high-efficiency PTT and excellent antitumor efficacy, which provided a promising and attractive combination therapy for the treatment of CRC. Graphic Abstract
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shaoqing Pan,Miao Cheng,Chen Ma,Huaijia Jing,Tongyu Shen,Jing Hu,Qianqian Liu,Tao Wei,Ruirui Wang,Wanfei Li,Bo Liu
With the unprecedented rise of flexible electronic technology, it is imperative to develop the matched flexible power supply systems. Magnesium ion battery (MIB), as a promising next-generation battery system, shows significant potential as a power source for flexible electronic devices. However, the research on flexible MIB remains in its infancy, and the exploration of novel and reliable flexible electrodes is crucial. Herein, a binder-free and flexible self-supporting electrode with bimetallic Bi–Sn nanoparticles anchored in carbon nanofiber (CNF@Bi-Sn) was fabricated via electrospinning method combined with subsequent calcinations, and applied to MIBs for the first time. The CNF@Bi-Sn simultaneously integrated the advantages of hierarchical porous carbon nanofiber framework, the homodisperse nanosized Bi-Sn particles, and the increased phase/grain boundaries, which were beneficial for improving the structural stability and facilitating Mg 2+ diffusion kinetics. The CNF@Bi-Sn alloy anode demonstrated impressive performance with high initial specific capacity of 738mAh/g, exceptional rate capability and outstanding cycling stability of 150mAh/g at 40 mA g −1 after 100 cycles. Significantly, the quantitative kinetic analysis, ex-situ SEM, TEM and XRD were conducted to reveal the structural evolution during cycling and the magnesium storage mechanism based on reversible two-phase alloying/de-alloying transformation reactions. Furthermore, the full batteries were assembled, demonstrating its potential for practical applications. This protocol sheds light on exploring high-performance flexible self-supporting alloy anode for future flexible power systems.
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IONICS
·
2025
·
IF 2.6
Li Mingzhao,Liu Xinyu,Shi Chonghua,Wang Jing,Yao Shaowei
Bimetallic zeolitic imidazolate framework materials (Zn/Co-ZIFs) represent a notable class within the field of metal–organic frameworks (MOFs). These materials are characterized by their advantageous properties typical of MOFs, including a high specific surface area and tunable pore sizes, in addition to exhibiting the structural stability that is characteristic of zeolites. In contrast, although tin-based materials demonstrate a high theoretical specific capacity, they experience significant volume changes during the charge and discharge cycles of batteries, leading to materal degradation and reduced cycling stability. In this study, Sn doping was successfully achieved in Zn/Co-NPC (N-doped porous carbon) by thermally treating Zn/Co-ZIFs at 700℃ through an impregnation method. This doping enhanced the sodium storage capacity of Zn/Co-NPC and improved its electrochemical performance. Experimental data indicate that the Sn/Zn/Co-NPC composite has a specific surface area of 332.80 m 2 g −1 and an average pore diameter of 7.30 nm. When this composite is used as the anode material in sodium-ion batteries, it demonstrates outstanding performance: after 100 cycles, its reversible specific capacity reaches 344.20 mAh g −1 (at a current density of 100 mA g −1 ) and exhibits excellent rate capability. Consequently, this study provides substantial insight into the prospective advancement of structurally stable and high-capacity anode materials for sodium-ion batteries.
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jian Shi,Jialin Li,Hui Ma,Donghuai Tu,Qian Zhang,Wei Mao,Jianming Yang,Jian Lu
RuO 2 supported on rutile TiO 2 or SnO 2 has been proved extremely effective for catalyzing the oxidation of HCl into Cl 2 . The supports play a crucial role in the catalyst systems. In this work, Ti-Sn oxides with different Sn/(Sn + Ti) molar ratios (0–0.2) were synthesized by a facile co-precipitation method as supports. The corresponding Ru/Ti-Sn oxide catalysts were investigated in HCl catalytic oxidation and systematically characterized to elucidate the role of Ti-Sn oxide supports on the process. The diffraction, spectroscopy and microscopy results reveal the crystal and surface structures of supports and catalysts. Among all the RuO 2 /Ti 1-x Sn x O 2 catalysts, RuO 2 /Ti 0.97 Sn 0.03 O 2 exhibits the best catalytic activity of 2.6 g Cl 2 ·g cat -1 ·h −1 with only 0.5% Ru loading and excellent stability on stream. Differed from the previous understanding, Ti 0.8 Sn 0.2 O 2 support containing the most rutile phase shows unsatisfying performance. The excessive Sn content renders more crystal disorder and volatile substrate, inevitably lowering the dispersion and stabilization of RuO 2 active phase. However, moderate Sn addition induces well-dispersed SnO 2 and rutile TiO 2 film, facilitating the dispersion of RuO 2 phase on the support surface with more active oxygen species. A large number of oxygen vacancies on Ti 0.97 Sn 0.03 O 2 can act as an active oxygen reservoir and boost catalytic performance.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
·
IF 4.598
Yuting Zhong,Zhirui Wu,Xiaoguang Liu,Ling Li
The combination of multi-metallic alloys and support materials is a promising approach for the design of electrocatalysts. In this study, Pd-M (M = Fe, Sb, Pb, Sn, Ag) bimetallic alloys embedded composites of 2D Ca-based metal–organic framework (Ca-MOF) nanosheets and reduced graphene oxide (rGO) were fabricated by a facile hydrothermal and impregnation reduction method, then applied as ethylene glycol oxidation reaction (EGOR) electrocatalysts. Remarkably, the forward peak current density of the best catalytic performer PdAg@rGO/Ca-MOF is as high as 258.30 mA cm −2 , which is 9.55 times greater than that of Pd/C. It also exhibits the biggest electrochemical active surface area of 3022.51 m 2 g −1 . After 3600 s chronoamperometry test, the retained current density of PdAg@rGO/Ca-MOF is about 87.94 % of the initial current density. These results imply that bimetallic Pd-M@rGO/Ca-MOF have superior electrocatalytic activity and anti-CO poisoning capacity compared to monometallic and Pd/C for EGOR, especially PdAg@rGO/Ca-MOF. The enhanced EGOR performance is due to the combined effect of Pd-M alloys and folded thin layer wrapped nanosheet rGO/Ca-MOF composites.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Zhangxing He,Yingqiao Jiang,Jing Zhu,Yuehua Li,Zhen Jiang,Huizhu Zhou,Wei Meng,Ling Wang,Lei Dai
In this paper, LiTi 2-x Sn x (PO 4 ) 3 /C (x = 0, 0.2, 0.3, 0.4) composites were synthesized by sol-gel approach, and were investigated as anodes for aqueous lithium ion battery . Sn doping with proper content has no obvious influence on phase and morphology of the composite, while excessive dosage of Sn can affect its crystal structure. Sn doping can enhance the electrochemical properties of LiTi 2 (PO 4 ) 3 /C (LC). Among LiTi 2-x Sn x (PO 4 ) 3 /C composites, LiTi 1.7 Sn 0.3 (PO 4 ) 3 /C (LC-Sn-0.3) demonstrates the best electrochemical properties. Most importantly, the rate performance of LC can be improved dramatically by Sn doping on Ti sites. LC-Sn-0.3 delivers a discharge capacity of 118.9, 115.3, and 104.2 mAh g −1 at 0.2, 6, and 20 C (1 C = 150 mA g −1 ), respectively, with significant increase of 15.2, 27.4, and 41.9 mAh g −1 compare with LC. In addition, LC-Sn-0.3 exhibits superior cycling performance. The capacity retention for LC-Sn-0.3 can keep 76.8% after 1000 cycles at relatively high rate of 10 C, while only 51.7% of initial discharge capacity is retained for LC. Our study reveals that Sn doping on Ti sites is an efficient and facile method to improve the performance of LiTi 2 (PO 4 ) 3 /C composite for aqueous lithium ion battery.
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Science China-Materials
·
2026
·
IF 7.7
Zhang Jianhao,Jia Yi,Li Quan,Wang Yang,Pan Limei,Yang Jian
Development of flexible materials integrating broadband electromagnetic wave (EMW) absorption, infrared stealth, and hydrophobicity is required for complex environments. In this work, flexible SiTiOC ceramic fiber felts embedded with Sn nanoparticles were fabricated via electrospinning followed by in-situ carbothermal reduction. The metallic Sn promotes carbon graphitization, forming a three-dimensional conductive network and establishing heterogeneous interfaces within the SiTiOC matrix. First-principles calculations indicate that the work function gradient ( Φ Sn < Φ C ) drives electron migration at the Sn/C interface, inducing interfacial polarization, while turbostratic carbon in the SiTiOC phase provides defect dipole polarization. The fiber felt exhibits an effective absorption bandwidth of 7.3 GHz at a thickness of 3.75 mm. The material integrates radar-infrared compatible stealth through low thermal conductivity and low emissivity, with a water contact angle exceeding 138°. These results provide an interface engineering strategy for multifunctional stealth materials in complex environments.
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