International Journal of Nanomedicine
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2018
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IF 4.37
Yong Huang,Xue Shen,Haixia Qiao,Hao Yang,Xuejiao Zhang,Yiyao Liu,Hejie Yang
Background Two frequent problems associated with titanium (Ti) surfaces of bone/dental implants are their corrosion and lack of native tissue integration.Methods Here, we present an anodization-hydrothermal method for coating Ti surfaces with a layer of silicon (Si)- and strontium (Sr)-loaded titania nanotubes (TNs). The Ti surfaces coated with such a layer (Si–Sr-TNs) were characterized with different techniques.Results The results indicate that the Si4+ and Sr2+ ions were evenly incorporated into the TNs and that the Si–Sr-TN layer provides good protection against corrosive media like simulated body fluid. The excellent cytocompatibility of the coating was confirmed in vitro by the significant growth and differentiation of MC3T3-E1 osteoblastic cells.Conclusion Being easily and economically fabricated, the Si–Sr-TN surfaces may find their niche in clinical applications, thanks to their excellent biological activity and corrosion resistance.
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PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
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2017
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IF 4.727
Zhengdong Wang,Yonghong Cheng,Mengmeng Yang,Jialiang Huang,Daxian Cao,Siyu Chen,Qian Xie,Wanxi Lou,Hongjing Wu
We report the fabrication of epoxy-based composites using well-designed core/shell Si/SiO 2 (denoted as Si*) and core/shell/shell structured Si/SiO 2 /Polydopamine (denoted as Si*@PDA) particles as fillers, which exhibit improved dielectric properties and thermal conductivity . Using the core-shell Si* and Si*@PDA particles as fillers in the epoxy-based composites, the dielectric loss tangent is remarkably suppressed and the volume resistivity is apparently enhanced, as compared with that using raw Si particles as fillers. Moreover, the Si*@PDA composites have higher dielectric constant and lower loss tangent. For instance, the dielectric constant of Si*@PDA/epoxy composite with 33.8 vol% filler content is up to 19.8 at room temperature at 100 Hz, which is nearly 5.3 times of that of the pure epoxy polymer (3.4), while its loss tangent is only 0.085. Additionally, the core-shell particle-based composites still possess a high thermal conductivity.
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Sustainable Energy & Fuels
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2018
·Vol. 2
·期 4
·820-826
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IF 0
Ming Chen,Gang Wu,Minmin Zhang,Jie Liu,Jiantao Zai,Xuefeng Qian,Xibin Yu
Photovoltaic modules are considered as the most efficient way to utilize solar energy, while the power conversion efficiencies of commercial crystalline silicon (c-Si) solar cells still need to be improved. Herein, nano-graphite was designed as a highly efficient electron transport layer in high performance ZnO/Si solar cells and prepared via a simple solution phase deposition and rapid annealing process. The ZnO QDs can broaden the range of spectral response by generating more electron–hole pairs via multiple exciton effects. The built-in-field formed between the n-type ZnO QD layer and n-type Si and highly conductive nano-graphite can accelerate the electron collection and transportation from n-type Si to the front electrode. Thus, the designed Si solar cell with nano-graphite and ZnO QD layers shows a significantly improved power conversion efficiency of 14.99% compared to the ZnO/Si solar cell (13.62%) and unmodified commercial c-Si solar cells (12.73%). This cost effective and environmentally friendly technology can be easily applied for the industrial scale production of Si solar cells.
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ACS Applied Energy Materials
·
2024
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IF 5.4
Bo Pei,Yinmei Li,Shenhui Ma,Yuyu Bu
The photoelectrochemical (PEC) water splitting performance of Si-based PEC devices is usually restricted by low stability and weak photogenerated carrier transport ability. Herein, a micropyramid array structure (p-SiMPs)/p-Cu2O/PhC2Cu/Pt photocathode device with a p-p-n heterojunction structure is developed. In this tandem PEC device, a p-p heterojunction of p-SiMPs/p-Cu2O is achieved, endowing a higher interface electric field and stronger energy of photoinduced electrons for PEC water reduction. In addition, a stable n-type PhC2Cu protective layer is prepared on the surface of the PEC device by the photoassisted polymerization method, which can improve the stability of PEC water reduction largely. After Pt cocatalytic layer deposition, the p-SiMPs/p-Cu2O/PhC2Cu/Pt tandem photocathode can achieve a saturation photocurrent density of −30 mA/cm2 at −0.9 V (vs RHE) and a photocurrent threshold voltage of −0.1 V for water reduction. This work provides a silicon-based p-p-n heterojunction tandem structure for the PEC water splitting; meanwhile, it indicates that PhC2Cu is a potential material to improve the stability of silicon-based PEC devices.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yingjun Qiao,Yuxin Hu,Zhiqiang Qian,Meizhen Qu,Zhong Liu
The yolk-shell architecture offers a promising solution to the challenges of silicon (Si) anodes in lithium-ion batteries (LIBs), particularly in addressing the significant volume changes that occur during charge and discharge cycles. However, traditional construction methods often rely on sacrificial templates and acid or alkali etching, which limits industrial applicability. In this work, we successfully constructed a silicon/carbon (Si/C) composite with a multicore yolk-shell structure using scalable spray drying technology and in-situ growth of metal–organic frameworks (MOFs) at room temperature. By controlling the spray drying parameters and the size of the MOF, we achieved a controllable adjustment of cavity size and shell integrity without the need for sacrificial templates, facilitating large-scale preparation. Electrochemical characterization shows that the composites exhibit impressive performance, achieving a reversible specific capacity of 1,054.5 mAh g −1 after 100 cycles at 0.5 A g −1 , and retaining 734.8 mAh g −1 after 400 cycles at 1 A g −1 . Moreover, finite element analysis (FEA) revealed another reason why the yolk-shell structure improves the performance of Si anodes: the presence of cavities promotes ion diffusion processes. This study provides a new synthetic paradigm for preparing Si-C composite materials with yolk shell structure and offers new insights into the improvement mechanism of this structure.
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高影响因子
Defence Technology
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2024
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IF 5
Zhanjun Yang,Hao Liu,Li Mi,Xiaoqian Wang,Oisik Das,Zhong xuan Han,Lin Jiang
To investigate the differences in combustion and energy release characteristics of metastable intermolecular composite materials composed of aluminum alloys and polyvinylidene fluoride (PVDF) with different compositions, two types of alloys were selected: Al-Mg and Al-Si. Pure aluminum powder of the same size was also chosen for comparison. The PVDF-coated metal particle composites and the mixtures of PVDF with metal particles were prepared using electrospray (ES) and physical blending methods (PM), respectively. A systematic study was conducted on the morphology, compositional structure, combustion performance, energy release characteristics, and thermal reactivity of the fabricated composites and their combustion products through scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), combustion performance experiments, closed vessel pressure tests, and simultaneous thermogravimetric-differential scanning calorimetry (TG-DSC). The experimental results indicated that the PVDF-coated metal particles prepared by the electrospray method exhibited a distinct core-shell structure, with the metal particles in close contact with the PVDF matrix. Compared to the PM blended materials, the ES composites demonstrated superior combustion performance and energy release characteristics during combustion. Analysis of different metal fuel systems under identical preparation conditions revealed that Al-Mg and Al-Si fuels modulate the combustion and energy release properties of aluminum alloy-PVDF MICs through two distinct pathways.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Qiang Zhang,Hongjuan Zhao,Xingyu Liu,Rui Li,Tian Xia,Yue Ma,Yuren Wang,Kang Chen,Jiujiang Wang,Penghui Zeng,Honghai Liu,Chaowei Liu,Xionghou Gao,Chunming Xu,Baojian Shen
It's a dream to make zeolites more stable so as to keep the activity and stability of the catalyst. Phosphorus modification is an effective method, however, the known post-modification predominantly presents as non-framework P, and the P-loss is a big trouble in application. We have discovered that in the reaction of PCl 3 or SiCl 4 + PCl 3 with NaY zeolite, a portion of P enters the framework of the zeolite, forming a PO 4 -AlO 4 structure. Further investigations revealed that P cannot be incorporated into the framework through P for Al isomorphous substitution, but rather through isomorphous substitution with Si(4Al). PCl 3 exhibits two effects in reaction: at lower quantities, it mainly undergoes isomorphous substitution with Si(4Al); at higher quantities, it leads to zeolite dealumination generating aluminum vacancies, which disrupt the zeolite framework or promotes Si for Al isomorphous substitution. After hydrothermal aging at 800 °C for 4 h, the stable presence of framework PO 4 -AlO 4 implies that the weakest site Si(4Al) becomes the more stable site P(4Al) in the Y zeolite framework. Compared with the JPY (prepared by impregnating (NH 4 ) 2 HPO 4 solution to high silica Y zeolite) sample, after 10 cycles of hydrothermal and water washing treatment, the P 2 O 5 loss rate of DPY (prepared by SiCl 4 + PCl 3 with NaY) zeolite ranged from 0.4 % to 3.5 %, significantly lower compared to the range of 18.7 % to 25.9 % observed in the JPY sample. This indicates that in DPY zeolite, the interaction between P and the zeolite is stronger and less prone to loss. Moreover, P is more uniformly distributed on the surface and bulk phase of DPY than JPY sample.
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JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Wenhui Geng,Xinmeng Hu,Qinhua Zhou,Yinhang Zhang,Bin He,Zhiliang Liu,Kuikui Xiao,Dong Cai,Shuo Yang,Huagui Nie,Zhi Yang
Silicon (Si) has been regarded as a candidate for high-energy-density lithium-ion batteries (LIBs) because of its excellent specific capacity. Binders, as an essential component in Si anodes, play a key role in enhancing the electrochemical performance of LIBs. In this study, a multifunctional binder named LP19 simultaneously possessing high electron conductivity, high Li-ion conductivity as well as ameliorative mechanical performances was synthesized by assembling the lithiated PAA (LiPAA) and highly conductive PEDOT:PSS molecules. The lithiation treatment of PAA is conducive to the transport of lithium ions, while the double conductive network constructed by conductive PEDOT:PSS and Super P guarantees the stable electric connectivity during lithiation and delithiation processes. Moreover, the optimization of the internal configuration of the molecules realizes the structural and cycling stability of the Si anode. As a consequence, the Si anode utilizing this binary and multifunctional conductive binder demonstrated pronounced cycling stability (2165 mAh g −1 after 200 cycles) and rate performance (1750 mAh g −1 at 8.0 A g −1 ). This work provided a novel design strategy of polymeric binders to promote progress toward high-performance LIBs.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2025
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IF 6.2
Qiaoguang Li,Wei Wei,Wenqing Xiao,Yunliang Li,Zekun Chen,Guijun Xie,Yigang Wang
We have successfully developed a molecular design strategy to synthesize a hydrogenated rosin-modified isocyanatopropyltriethoxysilane crosslinking agent (HRIS) with organic and inorganic active groups. Then curing it, rosin-based silicone rubber chemically cross-linked modified pine (RSP) is formed. This process enables the organic integration of fire-retardant silicon, nitrogen elements, and the rigid hydrogenated phenanthrene ring structure of rosin with the internal and external surfaces of the pine’s porous structure through chemical bonding. In the channels, rosin-based silicone rubber with 48.81 % of carbon, 42.96 % of oxygen, and 8.23 % of silicon, respectively was observed. The degradation mechanism coupled with LOI (limiting oxygen index) testing revealed that the RSP exhibited enhanced flame retardancy, with its LOI significantly increasing from 24.68 % to 25.4 %. Additionally, it exhibited higher thermal stability up to 330℃ than pine, indicating that the fire-retardant performance of RSP was effectively enhanced through the crosslinking modification with HRIS and PDMS (hydroxyl-terminated polydimethylsiloxane). During the thermal degradation process, RSP will produce gaseous cyclic siloxane molecules such as D3 (hexamethylcyclotrisiloxane), D4 (octamethylcyclotetrasiloxane), D5 (decamethylcyclopentasiloxane), etc. This study demonstrated that a new type of adhesive has been synthesized, but the influence of byproducts on the entire system should be considered in application, which is of significance for indicating the direction.
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FUEL PROCESSING TECHNOLOGY
·
2025
·
IF 7.7
Jie Yao,Hao Liu,Wei Liu,Jianxin Nie,Shi Yan,Xueyong Guo
Metal fuels are widely used in energetic materials to improve their energy release. Al Si alloy fuel is an aluminum-based alloy fuel, and its slow reaction rate limits its potential application in energy material systems. Herein, Al-Si-Mg AlSi9Mgx alloy fuel had been designed and successfully prepared by gas atomization to achieve excellent reactivity characteristics. The reaction characteristics of the fuel were systematically measured by thermal analysis (TG-DSC), bomb calorimeter, volumetric explosion vessel system and laser ignition measurement. Due to the addition of highly active magnesium, the activation energy of alloy fuel was reduced, and the combustion efficiency was increased to more than 99 %, and the ignition delay time was reduced by 6.7 ms and 33.6 ms respectively. Combustion of potassium perchlorate (KP) mixtures shows that AlSi9Mgx alloy fuels had a faster flame propagation rate, 22.814 mm/s and 42.543 mm/s. The superior reaction properties of AlSi9Mgx alloy fuel are due to the presence of internal solid solution Mg or low melting point alloy compound. This work and design provide a reliable method for optimizing the energy output of alloy fuels.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 48
·2507563
·
IF 19
Ke Su,Lefu Mei,Zunqi Liu,Xin Pan,Pengfei Shuai,Jiyang Xie,Bin Ma,Qingfeng Guo,Cunjian Lin,Mingxing Chen,Zhijian Peng,Libing Liao,Wanbiao Hu,Guocheng Lv
Balancing sensitivity and detection range in dynamic pressure monitoring materials remains challenging, with commercial ruby (Al 2 O 3 :Cr 3+ ) sensors limited by strong crystal fields, restricting performance under extreme conditions. Here, an innovative strategy utilizing an ordered-to-disordered structural conversion in Cr 3+ doped Ca(Mg,Sc)(Al,Si)O 6 phosphors is introduced. This approach achieves a remarkable blueshift sensitivity of 15.08 nm GPa −1 –2.8 times higher than ordered structures and 41 times higher than commercial sensors while maintaining a broad detection range up to 7.5 GPa. Moreover, enhanced structural rigidity notably improves luminescence intensity and thermal stability. The findings establish a robust paradigm for designing high-performance optical pressure sensors, significantly addressing the traditional trade-off between sensitivity and detection range, showing promising applications in geological exploration and aerospace fields.
研究领域:
材料科学
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光学传感器
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高压物理
·
发光材料
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高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 38
·385705
·
IF 2.9
Yongguang Xiao,Lisha Yang,Yong Jiang,Siwei Liu,Gang Li,Jun Ouyang,Minghua Tang
Lu doped Hf0.5Zr0.5O2 (HZO) ferroelectric films were prepared on Pt/TiN/SiO2/Si substrate by chemical solution deposition method, and an interfacial engineering strategy for improving the ferroelectric property was explored by capping the Lu doped HZO films with a cerium oxide layer. Compared with the Lu doped HZO film without the CeOx coating layer, the Lu doped HZO film with the CeOx coating layer has a larger remanent polarization (2Pr = 34.72 µC cm−2) and presents weaker wake-up behavior, which result from the higher orthogonal phase ratio and the lower oxygen vacancy of the CeOx coated Lu doped HZO film. In addition, the CeOx coating can remarkably improve the fatigue resistance and retention performance of the Lu doped HZO films. It is hoped that the results can provide an effective approach for the realization of high-performance and highly reliable hafnium oxide based ferroelectric thin films.
研究领域:
材料科学
·
铁电材料
·
薄膜
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高影响因子
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