CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Lingzhi Guo,Hongyan He,Yurong Ren,Chao Wang,Mingqi Li
Core-shell F-doped carbon coated SiO composites with interspaces and some small voids (SiO@F-doped C) are successfully fabricated using bulk SiO as starting material. With the assistance of polytetrafluoroethylene (PTFE), both etching and carbon coating of SiO are firstly performed in a single step, which largely lowers the production cost of materials. The SiO@F-doped C composite obtained by annealing the mixture of SiO and PTFE with a mass ratio of 5:3 at 650 °C shows the highest stable discharge capacity with excellent cycling stability. It delivers a stable discharge capacity of about 975 mAh g −1 at a current density of 100 mA g −1 . Even after the current density increases to 1600 mA g −1 , a stable discharge capacity of about 553 mAh g −1 can be achieved. At a current density of 400 mA g −1 , the composite maintains a discharge capacity of 752 mAh g −1 after 350 cycles, the retention of which is 99.2% versus that in the second cycle. Compared with the annealed SiO, in addition to higher conductivity, the ions diffusion rate of the SiO@F-doped C composite increases 2.94 times while the volume expansion falls by more than half, which should be responsible for its significantly enhanced electrochemical performance.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
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功能材料
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International Journal of Material Forming
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2026
·Vol. 19
·期 2
·61
·
IF 2.6
Ma Jianping,Zhang Shanqun,Chen Qihan,Chen Yike,Liu Fei,Lin Lifu
To address the forming–accuracy challenges of silica ceramic components fabricated via digital light processing (DLP), this study proposes a method for adjusting the absorption of incident light by silica ceramic slurries through the addition of organic dyes (curcumin, methyl chloride, and Sudan I), which significantly improves the printing accuracy. This study systematically investigates the effects of the content of different organic dyes on the rheological properties, curing behavior, and ultraviolet absorbance of silica ceramic slurries. The results show that adding organic dyes negligibly affects the rheological properties of silica ceramic slurries. For silica ceramic slurries containing curcumin and Sudan I, the organic dyes substantially increase the absorbance of the slurries. Consequently, even trace amounts of curcumin and Sudan I can significantly enhance the forming accuracy of silica ceramics. This study demonstrates that utilizing the selective light–absorption characteristics of organic dyes can suppress light scattering at its source, offering a straightforward and purity–preserving new route for fabricating high–precision, complex–structured SiO₂ ceramic components.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2026
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IF 4.8
Jian Xiao,Jiang Liu,Yuxin Guo,Jiali Lin,Qian Li,Dong Zeng,Ruizhi Wen,Hongchang Li
Given the vital nutritional and metabolic role of ascorbic acid (AA) and the need for rapid detection, a photoresponsive nanozyme-based composite was developed for sensitive, accurate, and convenient AA analysis. In this report, a ternary ZIF-8/g-C 3 N 4 /SiO 2 photoresponsive oxidase-mimicking system was developed and applied to AA detection. By regulating the loading ratio of ZIF-8 on the g-C 3 N 4 /SiO 2 substrate, the composite with excellent photoresponsive oxidase-like activity was successfully prepared. Owing to its enhanced visible-light absorption and efficient charge separation and transfer, the system exhibited significantly improved photoresponsive performance. Experimental results demonstrated that ZIF-8/g-C 3 N 4 /SiO 2 could catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), generating oxidized TMB (oxTMB) through the formation of reactive species, thereby producing a distinct color change. In an acidic environment, AA inhibited the oxidase-like activity of the catalyst due to its strong reducing capability, thus suppressing the colorimetric reaction. Based on this principle, the as-synthesized ZIF-8/g-C 3 N 4 /SiO 2 photoresponsive oxidase mimic was applied to the detection of AA in three beverages. The method revealed a good linear response within the concentration range of 1–40 μM, and the detection limit (LOD) was 0.14 μM. The recoveries of the spiked samples ranged from 95.00% to 103.85%, suggesting that the present method could be successfully applied to sense AA in practical samples. Furthermore, we integrated ZIF-8/g-C 3 N 4 /SiO 2 with the RGB strategy into a novel sensing platform for the visual/onsite semi-quantitative detection of AA in real samples, demonstrating the great potential prospects for the development of rapid food assay.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2022
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IF 7.926
Chuan-Zhu Zhang,Jun-Cheng Jiang,An-Chi Huang,Yan Tang,Lin-Jie Xie,Juan Zhai,Zhi-Xiang Xing
SiO/C anode materials for high-energy-density lithium-ion batteries (LIBs) have attracted considerable attention. However, battery capacity degradation and thermal safety problems caused by the large volume variation in the SiO/C anode during the long cycle limit its application. We propose the use of two composite additives to overcome the limitations of the current SiO/C anode materials. The electrochemical performance and thermal stability of the blank electrolyte (BE) and two composite additives were systematically compared using electrochemical, characterisation, and thermokinetic methods. The results revealed the synergistic effect of (2-cyanoethyl) triethoxysilane (TEOSCN) and 4, 5–difluoro‑1, 3–dioxolan‑2–one (DFEC) improved the cycling and thermal stability of the cells. The use of the additives resulted in the formation of a dense and thin SEI layer with LiF as the main material on the surface of the anode, which significantly improved the cycling stability of Li/SiO@C batteries. In addition, differential scanning calorimetry (DSC) measurements and thermokinetic analysis indicated that the addition of TEOSCN/DFEC significantly enhanced the thermal stability of the cells, which was mainly manifested as the delay of the exothermic peak and the increase in the activation energy of the mixture of the SiO/C anode and electrolyte. Our results suggested that the multifunctional additive offers a viable approach for developing LiBs with high energy density and excellent safety.
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JOURNAL OF POWER SOURCES
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2021
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IF 9.127
Yaozong Yang,Zhao Yang,Yuesong Xu,Zhaolin Li,Nana Yao,Jie Wang,Zhenhe Feng,Ke Wang,Jingying Xie,Hailei Zhao
Recently, silicon suboxide (SiO) attracts much attention as a promising anode material for high energy density lithium-ion batteries due to its high specific capacity. However, the active particle pulverization together with repeated rupture/reconstruction of the solid electrolyte interphase (SEI) film upon lithiation/delithiation process has been a critical issue that deteriorates the electrode cycling stability and therefore impedes its deployment in commercial batteries. To address this challenge, herein, vinylene carbonate (VC) and lithium nitrate (LiNO 3 ) are employed as synergistic additives to improve the electrode-electrolyte interface property. To circumvent the low solubility in carbonate solvent, LiNO 3 is incorporated directly into the electrode while VC still into the electrolyte solution . The synergistic addition of LiNO 3 and VC enhances the electrode reaction kinetics and improves significantly the cycling stability of the SiO anode. The SiO electrode with simultaneous addition of LiNO 3 and VC delivers a high reversible capacity of 1062.3 mA h g −1 and an excellent cycling performance with 94.5% capacity retention and 99.80% Coulombic efficiency for 160 cycles, demonstrating the superior effectiveness of VC and LiNO 3 in modulating the interface chemistry and structure of SiO anode.
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POWDER TECHNOLOGY
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2026
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IF 5.5
Qinglong Zhang,Guilin Wang,Bin Liu,Sawei Qiu,Tuo Ye,Youwang Hu,Xiaoyan Sun
K s = ε axial / ε radial is an experimental index of post-sintering shrinkage anisotropy. • Among the tested pressures, 120 MPa gives near-isotropic shrinkage and the lowest relative crystallinity index. • Larger deviations of K s from unity are associated with greater cristobalite formation. • Seed-assisted MD links stress-component ratio to interfacial ordering near a crystalline seed. Fused silica combines transparency and thermal stability, but conventional melt processing restricts complex shaping. Pressure-assisted near-net shaping of SiO₂ nanoparticles enables high surface quality and geometric complexity, although nonuniform compaction may influence densification and cristobalite formation. In this study, uniaxial thermal imprinting and sintering experiments were combined with seed-assisted enhanced-sampling molecular dynamics (MD). The axial-to-radial shrinkage ratio, Kₛ , quantified shrinkage anisotropy. At 120 MPa, Kₛ = 0.99 ± 0.01, with near-theoretical density and the lowest relative crystallinity index, whereas larger deviations from unity corresponded to higher crystallinity. Differential scanning calorimetry (DSC) showed a cooling event attributable to the β -to- α cristobalite transition in the 30 MPa specimen. Seed-assisted MD further linked the imposed stress-component ratio to interfacial ordering around the crystalline seed, although direct stress and pore-resolved measurements are required to establish causality. Overall, 120 MPa provided the most favorable overall response among the tested conditions, indicating that shrinkage anisotropy can guide compaction-pressure selection in fused-silica forming. Download: Download high-res image (171KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Meidan Que,Ziang Liu,Peihong Ma,Yanbo Sun,Shilei Cao,Xun Sun,Jun Xu,Liangliang Zhu
O₂ and UV synergistically establish Cu + /Cu 2+ equilibrium for exceptional oxygen tolerance. • The catalyst shows self-adaptive redox behavior and self-recovery capability for long-term stability. • A dual-site synergy via Dewar-Chatt-Duncanson mechanism enhances both CO₂ adsorption and reduction. Photocatalytic CO₂ reduction represents a promising solar-driven technology for converting CO₂ into high-value chemicals. Nonetheless, its practical application is significantly hindered by challenges such as low CO₂ concentration, competitive O₂ reduction, and photocatalyst instability under industrial conditions. To address these issues, a Cu δ+ -functionalized TiO₂@SiO₂ aerogel (TS-3HF-1Cu δ+ ) was synthesized via sol-gel, HF etching, and photoreduction. This catalyst enables durable CO₂ reduction under simulated flue gas and dilute conditions. Experimental results indicate that TS-3HF-1Cu δ+ photocatalyst exhibits CO and CH₄ production rates 2.21 and 1.57 times higher, respectively, than those of TS-3HF. Theoretical calculations based on the Dewar-Chatt-Duncanson model reveal that, Cu 2+ with partially vacant d orbitals, serves as the adsorption site to enhance CO₂ uptake by accepting σ-donation from CO₂ during reduction reaction. In contrast, Cu + , characterized by occupied d orbitals, serves as the active sites to facilitate electron transfer via π-backdonation, activating CO₂ for further reduction. The complementary functionality between the two valence states endows the catalyst with improved cycling stability in oxygen-rich environments and self-recovery capability, thus achieving photocatalytic performance restoration after 96 h of air exposure. These findings highlight the strong potential of Cu δ+ -modified catalysts toward practical industrial photocatalytic CO₂ reduction. Self-adaptive Cu δ+ sites in TiO₂@SiO₂ aerogels drive robust CO₂ photoreduction via reversible Cu + /Cu 2+ valence cycles. Regulated by the Dewar-Chatt-Duncanson model, this dual-site mechanism optimizes σ-donation and π-backdonation, ensuring exceptional stability and “self-recovery” even in oxygen-rich industrial environments. Download: Download high-res image (237KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Lanzhou Guo,Xiaodong Jing,Hai Huang,Kun Chen,Dongqing Zhou,Xiaoqiang Xiong,Yingying Xiong,Huayang Gong,Muhammad Imran Arshad,Tongyun Zhao
Achieving both high permeability and low core loss in soft magnetic composites (SMCs) remains a critical challenge for high-frequency applications. This study demonstrates that this trade-off can be effectively overcome through particle size dependent interfacial engineering of the insulating coating. This study uncovers a previously overlooked intrinsic size effect, larger particles favor high permeability but inherently suffer from poor coating integrity due to their rough, grain boundary rich surfaces. Capitalizing on this finding, we propose a particle size dependent interfacial engineering strategy, wherein each size fraction is coated independently with a tailored precursor amount before recombination, thereby transforming the conventional uniform coating paradigm into a fraction wise architectural design. Different size fractions are coated with tailored amounts of precursor: larger particles receive more to form a thick, uniform layer, while smaller particles retain a thin coating. After recombining, a synergistic composite microstructure was constructed and the designed FeNi50@SiO 2 SMCs integrate the advantages of both fractions. This tailored approach yields a remarkable combination of soft magnetic properties: an effective permeability of 154.55 with an excellent frequency-stability and a core loss as low as 72.63 mW/cm 3 (50 kHz, 50 mT). These values represent a significant improvement of 13.25% in permeability and a reduction of 16.47% in loss compared to conventionally coated counterparts. Our work not only presents a superior FeNi50 based SMC but also establishes a generalizable microstructure design principle for advanced magnetic composites.
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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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Advanced Materials Interfaces
·
2019
·Vol. 6
·期 10
·1801800
·
IF 4.713
Xin Cai,Wen Liu,Siyuan Yang,Shengsen Zhang,Qiongzhi Gao,Xiaoyuan Yu,Jun Li,Hongqiang Wang,Yueping Fang
Silicon-based materials (Si, SiO x , etc.) have intrigued numerous attentions to replace the graphite anode materials for high performance new-generation lithium-ion batteries. Herein, dual-confined SiO composites are developed as novel anode material for efficient lithium-ion batteries. The SiO-based anodes are prepared from commercial SiO microparticles via simple electrospinning, in which TiO 2 coated SiO particles are well embedded in the 3D interconnected carbon nanofiber web. Owing to the protective TiO 2 shell with extra capacitive activity, along with the conductive carbon nanofiber network affording sufficient void space to accommodate the volume expansion of SiO upon cycling, the dual-confined SiO anode can maintain its structural integrity and exhibit high reversible activity. It realizes acceptable initial Columbic efficiency and a stable discharge capacity of 760 mAh g −1 at 200 mA g −1 after 200 cycles, with an average capacity drop of 0.11% per cycle for continuous cycling. Besides, the ternary SiO@TiO 2 /carbon nanofiber composite allows for facilitated charge transport and electrolyte penetration in virtue of its 3D porous web structure, which contributes to a high-rate capacity of 338 mAh g −1 at 3 A g −1 . These inexpensive and stable SiO/carbon nanofiber composites can be potential alternative toward cost-efficient lithium-ion battery anode.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Hui Min Hu,Yang Li,Zhong Li,Lina Wang,Zongzhen Li,Ruoxuan Li,Hongxia Li,Xianguo Liu,Fuqi Zhao,Xuefeng Zhang
Soft magnetic composites (SMCs) have attracted significant attention as key magnetic materials with the ongoing trend toward high-frequency operation in electronic devices. However, conventional approaches to tailoring the magnetic properties of SMCs rely excessively on coating processes, highlighting an urgent need to develop new control strategies. In this work, the influences of silicone resin content and annealing temperature on the microstructure and soft magnetic properties of FeSiBCuNb nanocrystalline soft magnetic composites (NSMCs) were systematically investigated. During annealing, the thermal decomposition of silicone resin generates a SiO 2 insulating layer. Concurrently, part of the oxygen released from the decomposition of both the silicone resin and zinc stearate reacts with Fe in the FeSiBCuNb powder to form a uniform Fe x O y insulating layer, while the remaining oxygen reacts with Si to generate SiO 2- y . The dual-layer SiO 2 /Fe x O y insulating structure effectively suppresses magnetic losses. Moreover, annealing induces the precipitation of the α-Fe(Si) phase from the amorphous matrix, and the volume fraction and size of the α-Fe(Si) phase increase with increasing the annealing temperature, whereas excessive grain coarsening leads to the deterioration of magnetic properties. The NSMC with a silicone resin content of 1.5 wt% annealed at 450 °C gets remarkable comprehensive magnetic properties with a high effective permeability ( μₑ ) of 37.76, excellent frequency stability up to 1 MHz, and a DC bias performance of 51.82 % at 100 Oe. This work provides valuable insights for the development and application of novel high-performance SMCs by optimizing the coating process and tailoring the nanocrystalline structure.
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APPLIED THERMAL ENGINEERING
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2026
·
IF 7.5
Yuhang Wang,Xiaoke Wei,Canying Zhang,Daxiong Wu,Haitao Zhu
Fluorinated PI film integrates with BaHPO 4 /SiO 2 particles to form a Janus structure. • The film achieves 96.94% solar reflectivity and 94.70% MIR emissivity (6-16 μm). • Outdoor test shows 13 and 22 °C lower than commercial coatings and standard paints. • The film is flexible, durable, self-cleaning, and flame-retardant. Radiative cooling offers a promising passive strategy for thermal management of electronic devices; however, achieving the combination of high solar reflectivity, broadband mid-infrared (MIR) emissivity, and robust mechanical performance remains challenging. In this work, a fluorinated polyimide (PI)-based composite film with enhanced radiative cooling capability is developed via electrospinning followed by vacuum-assisted filtration. By incorporating BaHPO₄ and SiO₂ particles into a fibrous PI matrix, a gradient-structured composite is formed, enabling synergistic spectral regulation. The best-performing film exhibits a high average solar reflectivity of 96.94% (0.25-2.5 μm) and a strong broadband MIR emissivity of 94.70% (6-16 μm), matching the thermal radiation characteristics of typical electronic devices. The fabrication strategy also improves interfacial bonding, resulting in a tensile strength of 17.15 MPa. Experimental evaluations using a simulated electronic device demonstrate significant cooling performance, with temperature reductions of 13 °C and 22 °C compared to commercial high-reflectivity coatings and conventional paints, respectively. Additional tests confirm excellent flexibility, wear resistance, flame retardancy, hydrophobicity, and weather stability. This study provides a scalable approach to engineering high-performance radiative cooling films for energy-efficient thermal management of electronic systems operating under both indoor and outdoor conditions.
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危险品化学品经营许可证（带存储）