ACS Nano
·
2018
·
IF 13.709
Yongling An,Huifang Fei,Guifang Zeng,Lijie Ci,Shenglin Xiong,Jinkui Feng,Yitai Qian
Silicon is considered as one of the most favorable anode materials for next-generation lithium-ion batteries. Nanoporous silicon is synthesized via a green, facile, and controllable vacuum distillation method from the commercial Mg2Si alloy. Nanoporous silicon is formed by the evaporation of low boiling point Mg. In this method, the magnesium metal from the Mg2Si alloy can be recycled. The pore sizes of nanoporous silicon can be secured by adjusting the distillated temperature and time. The optimized nanoporous silicon (800 °C, 0.5 h) delivers a discharge capacity of 2034 mA h g–1 at 200 mA g–1 for 100 cycles, a cycling stability with more than 1180 mA h g–1 even after 400 cycles at 1000 mA g–1, and a rate capability of 855 mA h g–1 at 5000 mA g–1. The electrochemical properties might be ascribed to its porous structure, which may accommodate large volume change during the cycling process. These results suggest that the green, scalable, and controllable approach may offer a pathway for the commercialization of high-performance Si anodes. This method may also be extended to construct other nanoporous materials.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ENERGY
·
2021
·
IF 9.746
Qingyang Luo,Xianglei Liu,Haolei Wang,Qiao Xu,Yang Tian,Ting Liang,Qibin Liu,Zhan Liu,Xiaohu Yang,Yimin Xuan,Yongliang Li,Yulong Ding
Phase change materials (PCMs) based thermal energy storage techniques are promising to bridge the gap between thermal energy demand and intermittent supply. However, the low specific heat capacity ( C p ) and thermal conductivity of PCMs preclude the simultaneous realization of high energy density and high power density thermal charging/discharging. Here, concurrent enhancement of C p and thermal conductivity are demonstrated to be possible based on SiO 2 nanoparticles decorated LiNO 3 /NaCl eutectics inlaid in three-dimensional (3D) hierarchical ultralight silicon carbide (SiC) foams. The average C p is 4.86% higher than that of pure PCMs due to the high surface energy and interfacial thermal resistance induced by weak interaction between SiO 2 nanoparticles and eutectics, as confirmed by molecular dynamics (MD) simulations. The thermal conductivity of composites achieves an ultrahigh value of 2.78 W·m −1 ·K −1 , which is 259% of LiNO 3 /NaCl, accompanied with a large phase change enthalpy of 331.9 kJ/kg. Continuous heat transport paths provided by ultralight SiC foams have dominant contributions to the enhancement of thermal conductivity, although the presence of SiO 2 nanoparticles deteriorates it slightly. In addition, the full-spectrum solar absorptance is enhanced from 25.2% to 76.3%. Rapid thermal transport and enhanced solar absorptance of composites enable heat charging rate to rise by 150% compared with SiO 2 nanoparticles decorated eutectics. This work provides a strategy for the realization of high energy density and power density compatible thermal energy storage technology.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
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IF 5.8
Yuanjie Wang,Luke Ma,Xueliang Pei,Wanfeng Zhuo,Jing Huang,Qing Huang
The inevitable residual carbon that normally appears in the polycarbosilane-derived SiC ceramics has notorious effects on the crystallinity and thermal conductivity of SiC ceramic. In this study, nano Si was employed to fully exhaust unwanted residual carbon in a liquid polycarbosilane. Through addition of 12 wt% theoretical nano Si and pyrolysis to 1600 °C, the ceramic yield of the liquid polycarbosilane increased from 72.0 wt% to 81.8 wt% and the C/Si ratio of ceramic product decreased from 1.14 to 0.99. Raman spectroscopy and transmission electron microscope also confirmed that the residual carbon almost completely disappeared. In addition, the crystallization ability of SiC also improved, and as a result dramatical improvement in the thermal conductivity of SiC f /SiC composite was achieved. The reaction mechanism was investigated in detail to understand the residual carbon trapping effect of nano Si during the precursor-to-ceramic conversion.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Li Jingpeng,Zhang Meiyu,Li Wenxuan,Li Zhongshu,Zhu Tingshun,Yang Zhenyu
Silicon is a cornerstone material in electronics and photovoltaics due to its abundance, tunable semiconducting properties, and chemical versatility. Direct anchoring of thiophenes, with their highly delocalized aromatic backbones, onto silicon surfaces offers a promising route to tailor charge carrier migration properties. However, current methods for anchoring thiophenes commonly rely on pre-activation of precursors or transition-metal catalysts. Here, we introduce a catalyst-free radical strategy for direct linkage of thiophenes with Si atoms on organosilanes and silicon surfaces. This method leverages thermally induced homolytic cleavage of Si-H bonds to generate silicon radicals, which undergo efficient hydrosilylation with thiophene rings, forming Si-C linkages and releasing H 2 . We demonstrate the successful application of this approach on silicon surfaces, achieving functionalization with thiophenes that enhance charge carrier mobilities in silicon nanocrystals significantly higher than previously reported alkyl-functionalized SiNCs, indicating the significant potential of catalyst-free dehydrocoupling for advancing silicon-based materials in optoelectronic applications.
研究领域:
材料科学
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表面化学
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半导体技术
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光电子学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 18
·3804
·
IF 4.967
Tong Wu,Yuhong Qi,Qi’an Chen,Chuanjun Gu,Zhanping Zhang
To improve the antifouling performance of silicone fouling-release coatings, some fluorosilicone and silicone fouling-release coatings were prepared and cured at room temperature with hydroxyl-terminated fluoropolysiloxane (FPS) or hydroxy-terminated polydimethylsiloxane (PDMS) as a film-forming resin, tetraethyl orthosilicate (TEOS) as a crosslinking agent, and dibutyltin dilaurate (DBTDL) as a catalyst. The chemical structure, surface morphology and roughness, tensile properties, and antifouling properties of the coating were studied by infrared spectroscopy, a laser confocal scanning microscope, contact angle measurement, tensile tests, and marine bacteria and benthic diatom attachment tests. The results showed that the FPS coatings were not only hydrophobic but also oleophobic, and the contact angles of the FPS coatings were larger than those of the PDMS coatings. The surface free energies of the FPS coatings were much lower than those of the PDMS coatings. Generally, the fluorine groups can improve the antifouling performance of the coating. Introducing nonreactive silicone oil into PDMS or FPS coatings can improve the antifouling performance of the coating to a certain extent. The prepared fluorosilicone fouling-release coatings showed good application prospects.Keywords:fluorosilicone;hydroxyl terminated fluoropolysiloxane;antifouling;silicone oil;coatings
研究领域:
材料科学
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海洋生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2025
·
IF 2.7
Zengmou Li,Xiaoling Liu,Qianwen Wang,Xinyu Jiang,Rui Yan,Keyu Zhang,Yaochun Yao,Shaoze Zhang,Yin Li,Junxian Hu
Serious volume expansion for silicon-based material has extremely restricted its widespread application. Herein, Si@Na 2 SiO 3 composite with grape-liked structure was fabricated by a simple metal salt-assisted chemical etching method, which is enabled by the high corrosivity of NaHCO 3 . The gelatinous Na 2 SiO 3 can evenly coat the surface of Si nanoparticles, then efficiently inhibiting volume expansion. Meanwhile, porous structures etched by NaHCO 3 provide more diffusion channels for Li + . Si@Na 2 SiO 3 exhibits excellent cycling and rate properties: the discharge capacity of 1140.16mAh g −1 at 0.5 A g -1 after 100th cycling and the stable discharge capacity of 1565.64 mAh g −1 at 2.0 A g −1 . This research provides a simple and effective technology to exploit the high-capacity silicon-based anode material.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2016
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IF 2.101
Changchang Zhang,Heming Cheng,Xiang Liu
A convenient approach of preparing silicon nanotubes (SiNTs) on a silicon substrate is described in this work in detail. Firstly, a porous silicon (PSi) slice is prepared by a galvanic displacement reaction. Then it is put into aqueous solutions of 20% (w%) ammonium fluoride and 2.5 mM cobalt nitrate for a predetermined time. The cobalt ions are reduced and the resulted cobalt particles are deposited on the PSi slice. After the cobalt particles are removed with 5 M nitric acid a plenty of SiNTs come out and exhibit disorderly on the silicon substrate, which are illustrated by scanning electron microscopy (SEM). The compositions of the SiNTs are examined by energy-dispersive X-ray spectroscopy. Based on the SEM images, a suggested mechanism is put forward to explain the generation of the SiNTs on the PSi substrate.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Research
·
2025
·
IF 13
Yuepeng Yin,Mengfan Jia,Ping Li,Kaiwen Zhu,Min Nie,Xin Tang,Liqin He,Ting Li,Zhihong Guo,Zhigao Zhou,Lirong Li,Taolin Zhang,Xingxiang Wang,Changfeng Ding
Introduction Traditionally, Silicon (Si) fertilizers are applied externally to the soil or sprayed on the leaves to reduce rice’s arsenic (As) accumulation. However, in practical agricultural production, the economic benefits of lowering As in rice grains often fail to outweigh the production costs. Objectives This study investigated an innovative technology—Si-rich seedlings (endogenous Si)—that is simple to implement, cost-effective, and highly effective in reducing As accumulation in rice grains. Methods The effects of exogenous and endogenous Si supplementation on As dynamics in rice were investigated in hydroponics in field experiments. Results Both methods significantly reduced As accumulation in the rice grains (22.23 % and 17.70 %, respectively). There was no significant difference in the treatment effects. However, endogenous Si supplementation demonstrated a significantly lower cost per unit of As reduction (88.61 % decrease), and it was easier to implement when compared with exogenous Si supplementation. The main processes by which various Si treatment techniques decrease As accumulation in rice differed, even though Si was crucial to As absorption in rice through a combination of mechanisms, such as gene regulation, iron plaque inhibition, and node I sequestration. The fundamental mechanism was Si/As antagonism, which regulated Si absorption through gene regulation in both methods. Interestingly, the exogenous Si treatment improved the barrier function of the root surface iron plaque against As. At the same time, laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) demonstrated that endogenous Si had a more pronounced impact on rice node I. Furthermore, experiments conducted at multiple scales (including variety, pot, and field experiments) validated the stability and reliability of the Si-rich seedling technology under complex environmental conditions. Conclusion Si-rich seedlings provide a cost-effective, stable, and practical solution for mitigating As contamination in paddy fields. This approach holds significant potential for enhancing soil health and improving food safety, contributing to the sustainable development of rice cultivation.
研究领域:
植物学
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环境科学
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农业科学
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产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 39
·24173-24180
·
IF 3.945
Shuzhen Dou,Jiaxin Lu,Zhongshun Wang,Qunyan Zhu,Chunning Chen,Nan Lu
The surface morphology of the silicon nanostructure plays a crucial role in the laser desorption/ionization (LDI) process. Understanding the correlation between the surface morphology and LDI performance is the foundation for creating silicon substrates with high LDI efficiency. Most of the present studies focus only on the structural parameters (such as porosity, depth, total surface area, dimension, etc.) of a single structure, but their effects on LDI efficiency vary with the types of silicon structures. Herein, two representative types of silicon nanostructures, porous silicon (PSi) and thorny silicon (TSi), were created to address this issue. The results indicate that the PSi substrate can generate a stronger heat effect and is beneficial to desorption; the TSi substrate can facilitate electron transfer and is favorable to ionization. Subsequently, the assertion was further confirmed by simultaneously detecting a dozen of standard samples and a real sample on both the TSi and PSi substrates, in which PSi can significantly enhance the detection signals of organic salts, whereas the TSi substrate can greatly increase the LDI efficiencies of neutral analytes. This finding provides a foundation for improving the LDI performance by tailoring silicon nanostructures, which is helpful for designing and creating substrates with high LDI performance.
研究领域:
分析化学
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材料科学
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生物医学
✓ 已验证
DOI
PubMed
高影响因子
Environmental Technology & Innovation
·
2024
·
IF 6.7
Xiao-Huang Chen,Su-Huai Chang,Rui Jiang,Yong-Qiang Tian,Li-Ping Jia,Feng-Jiao Liu,Xu-Guang Huang
Cadmium (Cd), a prevalent pollutant in near-shore seawater ecosystems, poses a significant threat to marine biota. Zinc (Zn) and Cd can have interchangeable physiological effects in marine plankton, and both can influence the synthesis of siliceous walls. Consequently, the concentrations of zinc and silicon may jointly impact the toxicity of Cd. This study endeavors to elucidate the combined effect of silicon (Si) and zinc (Zn) on the growth and physiological responses of the marine diatom species Thalassiosira weissflogii when subjected to Cd-induced stress conditions (190.7 μg L −1 ). Our results reveal statistically improvements ( p <0.05) in biomass production, reductions ( p <0.05) in superoxide dismutase (SOD) activity and extracellular secretion in T. weissflogii when high concentrations of Si (172 µmol L −1 ) and Zn (18.3 nmol L −1 ) were applied simultaneously. Additionally, examination of Cd bioconcentration factors (BCF) derived from Cd uptake kinetics and intracellular Cd content measurements underscores the ability of elevated Si and Zn concentrations to reduce intracellular Cd accumulation ( p <0.05). The ability of Si and Zn to mitigate Cd toxicity was further evidenced by increased cellular biosilica content and maintenance of cell morphology, suggesting a protective role in preserving structural integrity and growth. Our findings underscore the synergistic benefits of Si and Zn in enhancing the resilience of T. weissflogii to Cd stress, providing valuable insights into the potential use of nutrient amendments as a strategy for mitigating heavy metal contamination in marine environments.
研究领域:
海洋生物学
·
环境科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qianlong Fu,Shiquan Sui,Yuting Ma,Shuo Sun,Xiaoyu Wang,Qingbo Meng,Shuang Li,Yang Zhao
The development of additive manufacturing technique provides possibility to prepare SiC ceramics with complex shapes. However, defect control in the debinding and sintering stages is still a great challenge for the vat photopolymerized components. Here, SiC ceramics were manufactured by vat photopolymerization followed by liquid silicon infiltration, using SiC whiskers as the reinforcement. In the debinding stage, the SiC whiskers prevented the propagation of micro-cracks that induced by the formation and emission of gaseous substance. Also, the SiC whiskers provided channels for the infiltration of liquid silicon during sintering, thus the bulk density of the as-sintered SiC w /RBSC composite reached 2.95 g/cm 3 at the whiskers fraction of 8 wt%. Because of the various toughening mechanisms introduced by SiC whisker, the flexural strength and Vickers hardness of the composite increased up to 352.2 MPa and 17.54 GPa, respectively. Thus, this work provides a new strategy to control micro-defects in vat photopolymerized SiC ceramics.
研究领域:
材料科学
·
先进制造
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 71
·44655-44658
·
IF 3.108
Cui-Li Chen,Jiang Zeng,Ning Bao,Hong Dai,Hai-Ying Gu
Converting silicon hydride (–SiH) to oxygen backed silicon hydride (–OSiH) on porous silicon leads to a shift in the wavelength of photoluminescence (PL) maximum from 670 to 605 nm, corresponding to an increase of 0.2 eV on emission energy. The results implied that silicon hydride, which links to the surfaces of silicon nano-crystals (SiNCs) via oxygen atoms, is directly responsible for the wavelength change of the PL peak.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）