GREEN CHEMISTRY
·
2026
·
IF 10.6
Chenxi Qu,Qian Liu,Jianhua Bu,Kewei Ding,Songsong Guo,Na Li,Hexin Liu,Hansheng Li,Jian Lu
The development of high-energy-density energetic materials from low-cost raw materials remains a formidable scientific challenge. Significantly, photovoltaic silicon waste with exceptional purity and high combustion enthalpy represents an ideal low-cost candidate. This study demonstrates the construction of energetic Ammonium Dinitramide (ADN) /Si coparticles from halogen-free ammonium dinitramide and silicon, offering a sustainable strategy for silicon upcycling and green propellant applications. Multiscale characterization (SEM, XRD, FT-IR, XPS) revealed that nano-silicon formed intimately structured coparticles with ADN, while micro-silicon led to physical mixtures. XRD confirmed well-crystallized ADN and silicon phases without detectable oxidation. XPS and FT-IR confirmed interfacial interactions via Si 2p binding energy shifts (0.1–0.9 eV) and vibrational peak blue shifts (10–20 cm⁻¹). Thermal analysis (DSC/TG-MS-FTIR) indicated a 14–23 °C delay in decomposition onset temperature and a 10–20% increase in apparent activation energy, attributed to partial redox reactions between silicon and NO₂ from ADN decomposition. With 80 mass% ADN loading, nano-silicon coparticles achieved a heat release of 12.58 kJ/g, which is approximately three times that of TNT, along with tunable impact sensitivity (4–11 J) and friction sensitivity (96–240 N). Laser ignition tests confirmed reduced ignition delay and enhanced combustion behavior due to nanoscale reactivity. Furthermore, this coparticle construction strategy is directly applicable to real industrial silicon waste. Real photovoltaic silicon kerf waste can be directly used for composite fabrication after simple pretreatment, whose inherent SiC and Fe-based alloy impurities only reduce the combustion heat by 4.8% to 13.4%, preserving the core energetic performance while exerting a modest beneficial effect on the application safety of the material. This work presents a microstructure-driven strategy for optimizing energy release and safety in silicon-based energetic materials.
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DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2026
·
IF 6.7
Feng Wang,Chuncai Zhou,Chen Li,Bentao Li,Tingwen Wang,Guijian Liu
Coal fly ash (CFA), a typical industrial solid waste rich in Si and Al with associated critical elements (Ga, Ge, REEs), poses environmental risks while having high resource utilization potential. Its valuable elements are hosted in aluminosilicate glass, hindering their recovery. Na 2 CO 3 roasting releases Na 2 O with strong lattice-disrupting capability, leading to the depolymerization of aluminosilicate lattices. In this study, experimental characterization and HSC Chemistry thermodynamic calculations were combined. The experimental and thermodynamic results were used to elucidate the evolution of the aluminosilicate lattice and the reconstruction of mineral phases. The reaction was substantially promoted at a Na 2 CO 3 /CFA mass mixing ratio of 1, and residual mullite, quartz and Na 2 CO 3 were no longer detected when the temperature increased to 850℃. The main reaction occurred at 600–900℃ and proceeded in three stages. (1) Reaction initiation stage (≤ 600℃): Some crystal defects and short-range ordered sodium aluminosilicate structures formed, while the overall lattice was not completely destroyed. (2) Structural reorganization stage (700–800℃): Inert aluminosilicate crystalline phases progressively disappeared, while nepheline-type sodium aluminosilicates and sodium silicate formed, with reaction intermediates coexisting with newly formed phases. (3) Recrystallization and stabilization stage (850–900℃): The roasting reaction was nearly complete, and the crystalline fraction of the roasted products consisted mainly of nepheline-type sodium aluminosilicates and sodium silicate, while a substantial amorphous component remained. The glassy phase and quartz contained in CFA could account for the lower temperature required for Na 2 CO 3 roasting compared with that required for pure minerals. This work provides theoretical support for CFA resource utilization.
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DOI
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Li Xiao,Xiuxian Li,Zhukang Zhang,Yue Long,Gang Wang,Hengxiang Gong
Integrating wide band gap semiconductor materials with silicon (Si) to create heterojunctions is an effective strategy for enhancing the ultraviolet (UV) sensitivity of optoelectronic devices. However, epitaxially growing high-quality wide band gap films on Si substrates at low temperatures without compromising the properties of Si remains challenging. In this study, we introduce a low-cost mist chemical vapor deposition (CVD) technique to deposit Cs3Cu2I5 perovskite films and fabricate a simple-structured Cs3Cu2I5/n-Si planar heterojunction. This technique enables an orderly deposition and rapid crystallization process, distinct from traditional solution-based methods. Herein, we report for the first time a compact, thick Cs3Cu2I5 film with an average grain size of 5.27 μm and a thickness of approximately 2.8 μm exhibiting orientated growth along the (303) plane. Furthermore, the simply constructed Cs3Cu2I5/n-Si photodiode exhibited a maximum photoresponsivity of 186 mA W–1 and a specific detectivity of 2.5 × 1012 Jones under 278 nm illumination. The on–off cycling tests demonstrated excellent operational stability, with unpackaged devices retaining 90% of their initial photocurrent after two months of storage under ambient conditions.
研究领域:
材料科学
·
光电子学
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DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Wei Wang,Ruixiang Liu,Xiangyu Jin,Gu Liu,Jiaxin Zheng,Changqing Hong,Xinghong Zhang
The pronounced oxidative degradation and substantial ablation recession of traditional lightweight ablative materials in low-altitude, medium-to-high temperature service environments highlight a critical deficiency, underscoring the urgent need for novel, high-performance ablation-resistant thermal protection systems. Herein, we utilize in-situ chemical grafting principles combined with sol-gel processes to develop a ceramic fiber matrix material system. The bending strength of MFC reached 7.7 MPa; the compressive strengths in Z direction and XY direction were 4.0 MPa and 9.03 MPa, respectively, due to the confining effect of the SiPRA. The thermal conductivity of MFC was 0.031–0.051 W/(m·K). More importantly, the increased fiber content reduced the effective heat release of MFC, demonstrating outstanding ablation-resistant thermal insulation properties. After repeated testing (1300°C-1800 s/cycle), the backside temperature was 188.2–218.9 °C, with zero ablation retreat; under short-term aerodynamic conditions at 1750 °C, the backside surface temperature ranges from 122.6 to 134.3 °C, with a linear ablation rate as low as 0.021 mm/s. MFC is an ideal choice for thermal protection systems in hypersonic spacecraft, and near-space vehicles.
研究领域:
材料科学
·
航空航天工程
·
热防护系统
·
陶瓷复合材料
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高温材料
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Huadong Fu,Yong Xie,Rui Chen,Wenzhen Qin,Xiu Wang,Yan Qin
Designing multifunctional integrated materials for thermal protection and microwave absorption in extreme environments is significantly challenging. In this work, surface-hydroxylated multiwalled carbon nanotubes (OH-MWCNTs) were incorporated into silicon-zirconium (CNTs/Si-Zr) hybrid phenolic aerogel to fabricate lightweight composites having a density of 0.42 g/cm 3 and thermal conductivity of 0.130 W/(m·K). The OH-MWCNTs enhanced the graphitization of pyrolytic carbon and promoted in situ formation of ZrO 2 /SiC multiphase ceramic layers during ablation, demonstrating an ultralow linear ablation rate of 0.034 mm/s under oxyacetylene flame at 2.0 MW/m 2 . The hierarchical porous structure of the hybrid aerogel composites, combined with the encapsulation mosaic architecture of OH-MWCNTs and ceramic-enriched matrices, facilitated multiple electromagnetic wave scattering and interfacial polarization. Consequently, the OH-MWCNTs incorporated CNTs/Si-Zr aerogel composites exhibited broadband microwave absorption, covering 100 % of the Ku-band and 50 % of the X-band. This work demonstrates a synergistic ceramic-forming strategy to integrate thermal protection and microwave absorption in a single material, advancing the development of multifunctional aerogel-based composites for extreme environment applications.
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高影响因子
Energies
·
2019
·Vol. 12
·期 17
·
IF 2.707
You Zhou,Wei Hong,Ye Yang,Xiaoping Li,Fangxi Xie,Yan Su
Increasing compression ratio and using lean burn are two effective techniques for improving engine performance. Methanol has a wide range of sources and is a kind of suitable fuel for a high-compression ratio spark-ignition lean burn engine. Lean burn mainly has a dilution effect, thermal effect and chemical effect. To clarify the influences of different effects and provide guidance for improving composition of dilution gases and applications of this technology, this paper chose Ar, N2and CO2as diluents. A spark-ignition methanol engine modified from a diesel engine with a compression ratio of 17.5 was used for the experiments. The results obtained by using methanol spark ignition combustion indicated that at engine speed of 1400 rpm and 25% load, NOx dropped by up to 77.5%, 100% and 100% by Ar, CO2and N2. Gases with higher specific heat ratio and lower heat capacity represented by Ar exhibited the least adverse effect on combustion and showed a downward break-specific fuel consumption (BSFC) trend. Gas with high specific heat capacity represented by CO2can decrease NOx and total hydro carbons (THC) emissions at the same time, but the BSFC of CO2showed the worst trend, followed by N2. Gas affecting the combustion process like CO2had chemical effect.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Weidong Cai,Zhixing Gan,Feng Nan,Shun Wang,Fuxiang Ji,Yiqiang Zhan
We present a novel and stable laminated structure to enhance the performance and stability of silicon (Si) photocathode devices for photoelectrochemical (PEC) water splitting. First, by utilizing Cu nanoparticle catalysts to work on a n+p-black Si substrate via the metal-assisted chemical etching, we can achieve the black silicon with a porous pyramid structure. The low depth holes on the surface of the pyramid caused by Cu etching not only help enhance the light capture capability with quite low surface reflectivity (<5%) but also efficiently protect the p–n junction from damage. To improve the charge migration efficiency and mitigate parasitic light absorption from cocatalysts at the same time, we drop casted quantum dots (QDs) MoS2 with the size of nanometer scale as the first layer of catalyst. Hence, we then can safely electrodeposit cocatalyst Co nanoparticles to further enhance interface transfer efficiency. The synergistic effects of cocatalysts and optimized light absorption from the morphology and QDs contributed to the overall enhancement of PEC performance, offering a promising pathway for an efficient, low cost, and stable (over 100 h) hydrogen production photocathode.
研究领域:
材料科学
·
可再生能源
·
光催化
·
纳米技术
·
半导体器件
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Shan Fang,Laifa Shen,Guiyin Xu,Ping Nie,Jie Wang,Hui Dou,Xiaogang Zhang
A unique core–shell structure of silicon@titania (Si@TiO2) composite with silicon nanoparticles encapsulated in TiO2 hollow spheres is synthesized by a simple hydrolysis method combined with magnesiothermic reduction method. It is found that the TiO2 shell is effective for improving the electrical conductivity and structural stability. More importantly, the well-designed nanostructure with enough empty space would accommodate the volume change of silicon during the cycling. Reversible capacities of 1911.1 and 795 mAh g–1 can be obtained at 0.05 C and a high current rate of 1 C, respectively. After 100 cycles at 0.1 C, the composite electrode still maintains a high capacity of 804 mAh g–1. This excellent cycling stability and high-rate capability can be ascribed to the unique core–shell nanostructure and the synergistic effect between Si and TiO2.
研究领域:
材料科学
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储能技术
·
纳米科技
·
电化学
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DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Peng Zhang,Junyou Chen,Lingfei Feng,Mingchi Jiang,Bin Xu
Silicon (Si) shows great potential for lithium-ion batteries (LIBs) due to its high theoretical capacity and low working potential. However, its intrinsic low electronic conductivity and large volume expansion during lithiation result in dramatic capacity fading and poor rate capability. Herein, a dual-confinement strategy is proposed for improving the lithium storage properties of Si by uniformly anchoring Si nanoparticles within a MXene/ZIF-8 derived carbon framework. In the Si/MXene@C composite, Si nanoparticles tightly bond with MXene and carbon through the formed interfacial Si–O–Ti and Si–C bonds, respectively, which is beneficial for alleviating the volume expansion of Si and promoting the interfacial charge transfer. Therefore, the Si/MXene@C composite exhibits excellent lithium storage performances in terms of high capacity (1006.1 mAh g–1 at 100 mA g–1), stable cycle performance (862.9 mAh g–1 after 150 cycles at 100 mA g–1), and superior rate capability (233.3 mAh g–1 at 5 A g–1), indicating its promising potential as an anode material for next-generation high-performance LIBs.
研究领域:
材料科学
·
储能
·
电化学
·
纳米复合材料
·
锂离子电池
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DOI
高影响因子
Chinese Medicine
·
2026
·Vol. 21
·期 1
·34
·
IF 5.7
Fan Haibo,Hou Yalei,Li Yue,Zheng Zhiwen,Wang Xuelun,Li Yunfeng,Li Yongmin
Background Metabolic-associated fatty liver disease (MAFLD) is a common metabolic disease with complex pathogenesis and lack of effective treatment. Si-Ni-San (SNS), a traditional Chinese medicine, has emerged as a promising candidate for MAFLD treatment. However, the protective mechanism remains unclear. Methods C57BL/6N mice were fed with high-fat diet (HFD) for 12 weeks to establish MAFLD mouse model. Concurrently, oleic acid-induced HepG2 cells were used in vitro as a cellular model for MAFLD. The effects of SNS and the positive drug obeticholic acid on hepatic lipid droplets deposition in MAFLD mice and cell models were evaluated. The expression levels of farnesoid X receptor (FXR) and glycerol 3-phosphate acyltransferase 4 (GPAT4) were detected by western blot. The siRNA and dual-luciferase reporter assay were used to detect the interaction between FXR and GPAT4. High-performance liquid chromatography (HPLC) was used to identify the active components in the SNS aqueous solution, and their binding affinities to targets were detected through molecular docking, molecular dynamics simulations, and surface plasmon resonance (SPR). Results The active ingredients of SNS were identified by HPLC. SNS ameliorated hepatic lipid droplets deposition in both mouse and cellular models of MAFLD. SNS up-regulated the expression of FXR and down-regulated the expression of GPAT4 in hepatic tissues, thereby modulating proteins involved in hepatic lipolysis and lipophagy. FXR reduced lipid droplets accumulation by inhibiting GPAT4. The dual-luciferase reporter assay confirmed that FXR transcriptionally regulated and inhibited GPAT4 expression. Furthermore, molecular docking and molecular dynamics simulations predicted potential interactions between the active components of SNS and the FXR and GPAT4 proteins, with the binding affinity for FXR being subsequently confirmed through SPR analysis. Conclusion This study provided a new mechanistic exploration for FXR in improving MAFLD and broadened the research direction on the mechanisms by which SNS reduced hepatic lipid droplets deposition. It also offers a molecular dynamics basis for subsequent studies on how active components in SNS exert their effects through binding to FXR.
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DOI
PubMed
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2021
·Vol. 32
·期 9
·3364-3371
·
IF 4.833
Zigui Luo,Xi'an Fan,Yanglin Zhang,Zhenjia Yang,Jian Wang,Zhaoyang Wu,Xin Liu,Guangqiang Li,Yawei Li
Fe-Si soft magnetic composites (SMCs) coated with MnO-SiO 2 composite coatings were fabricated via sintering the ball milled Fe-Si/MnO 2 composite powders. The transformation mechanism from MnO 2 coating to MnO-SiO 2 composite coatings was studied. The effect of MnO 2 content on the microstructure and magnetic properties of Fe-Si soft magnetic composites has also been investigated systematically. The analysis results indicated that MnO 2 would be reduced to MnO by Si in the Fe-Si particles at 780.1 ℃. When the temperature reached 985.8 ℃, the generated MnO and SiO 2 would further combine to form 2MnO·SiO 2 , finally forming the MnO-SiO 2 composite coatings. With the increase of the MnO 2 content from 0.0 wt% to 10.0 wt%, the MnO-SiO 2 composite coatings became thicker, thus the saturation magnetization and permeability decreased gradually. However, exorbitant MnO 2 content above 5.0 wt% would result in excessive in-situ Fe existed in the composite coatings and obvious reduction of Si content in the Fe-Si particles due to the above solid-state reactions. Therefore, the increasing trend of the resistivity was weakened. And the 5.0 wt% MnO 2 coated Fe-Si SMCs exhibited superior comprehensive performance such as high saturation magnetization (186.5 A·m 2 /kg), good permeability (71), low total core loss (362.6 mW/cm 3 at 50 kHz).
研究领域:
材料科学
·
磁性材料
·
复合材料
·
固态化学
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DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Yushu Liu,Changquan Wu,Xuerui Yang,Yifan Wu,Xiaowei Huang,Hongming Wang,Naigen Zhou
The combination of Ni-rich cathodes and silicon-graphite (Si C) anodes offers high energy density and fast-charging potential for electric vehicle (EVs), yet their practical performance is limited by sluggish interfacial ion transport and unstable interphases in conventional carbonate electrolytes. Herein, we develop a novel multifunctional siloxane additive, dimethoxymethylvinylsilane (DOMS), and elucidate its mechanism in enabling fast charging. DOMS promotes Li + desolvation by weakening solvents-Li + coordination, while scavenging HF via the cleavage of Si O and Si C bonds. Importantly, the selective decomposition of DOMS induces the in-situ formation of robust inorganic interfacial phases enriched in Si O and Si F species on both electrode surface, which facilitate Li + transport and suppress interfacial side reactions. Meanwhile, the accompanying organic components composed of polyethylene (PE) and poly(methyldifluorosilylethylene) (PMDFSE) effectively buffer electrode volume effect during cycling. Collectively, these synergistic effects yield a chemically robust and kinetically favorable interface, enabling exceptional fast-charging performance. At an areal-loading of 17.53 mg cm −2 , Si-C||LiNi 0.9 Co 0.05 Mn 0.05 O 2 coin cells deliver 71% capacity retention after 300 cycles at a high current density of 499.6 mA g −1 , whereas pouch cells reach 85.58% after 400 cycles at 200 mA g-1. This work establishes a mechanism-driven siloxane additive strategy for fast-charging, high-energy-density lithium-ion batteries.
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高影响因子
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