Catalysts
·
2026
·Vol. 16
·期 2
·
IF 4.5
Xiaoxia Ye,Qiu Wu,Guifang Yang,Yuancai Lv,Minghua Liu
Developing green water disinfection technology has been attracting much attention all over the world. In this work, a WO3/BiOBr@Si composite was obtained through the solvothermal process, which exhibited denser and fuller intersecting petal-like spheres (1–3 μm in diameter) and retained its 3D sheet-like pore structure. The optical and electrochemical analysis demonstrated that the doped Si showed insignificant improvement in UV-Vis light absorption but greatly promoted the electron-hole separation efficiency and charge transfer capability on the surface of the catalyst at a 4.6 wt% Si doping dosage, resulting in an excellent performance in the inactivation ofEscherichia coli(E. coli) under the irradiation of visible light. Under the optimal conditions (0.5 g/L of WO3/BiOBr@Si dosage, 107CFU mL−1ofE. coliconcertation, and 30 min of treating time), the largest log value decline (6.6) occurred with WO3/BiOBr@1.0Si, which was 3.3 and 1.8 times larger than those of BiOBr (2.0) and WO3/BiOBr (3.7). According to the TEM, SEM, EDS, XRD, FTIR, and XPS analyses, in the photocatalytic system, the hole (h+) and •OH were the main species for inactivatingE. colicells. These oxidizing species could attack the components on the surface of cells (such as the hydroxyl, carbonyl, ester, and amide groups of polysaccharides (PS) and proteins (PT)), resulting in the inactivation and destruction of the cell membranes and leakage of intracellular substances. The findings will provide a significant guide for developing an efficient catalyst for the green water disinfection process.
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高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2025
·
IF 3.2
Hexing Ren,Yaxin Wang,Jiahong Wen,Fan Zhang,Chengxuan Tang,Xiqiang Zhong,Yongjun Zhang,Yuxia Wang,Renxian Gao,Kun Zhang,Fengyi Zhang,Rufei Cui,Xiaoyu Zhao
Nanosphere lithography enables tunable fabrication of Si nanoarrays (hexagons, stages, cones) on Si (100) by precisely controlling etching time. Specifically, the nanostage arrays, with their high surface area due to neck regions, can absorb more Ag nanoparticles (AgNPs), leading to superior SERS performance through the formation of hotspots. In addition, COMSOL simulations confirm plasmon coupling inter-particle, particle-film, and inter-structure. The linear detection of Thiram (0.05–50 ppm) remains stable within 120 days, meeting practical requirements for pesticide detection and showing potential for food safety applications.
研究领域:
分析化学
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食品安全
·
纳米技术
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DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Qinling Liu,Junhan Chu,Yuhui Xie,Zhaoyu Li,Feng Wu,Dong Feng,Yang Meng,Yi Mei,Delong Xie
s The development of high-performance flame-retardant polypropylene (PP) composites is essential for enhancing fire safety across various industries. However, conventional intumescent flame retardant systems often suffer from poor char stability, weak condensed-phase protection, and insufficient gas-phase flame inhibition. To address these challenges, this study introduces a synergistic system combining Si-modified MXene (Si-MXene) and piperazine-modified ammonium polyphosphate (PAPP) to enhance the flame retardancy of PP composites. The piperazine modification of PAPP improves its compatibility with PP, facilitating uniform dispersion and enhancing its catalytic charring capability. Simultaneously, Si-modified MXene reinforces the char layer by promoting the formation of a highly graphitized and compact carbon structure, effectively blocking heat and oxygen transfer. As a result, the Si-MXene/PAPP system significantly reduces the peak heat release rate (PHRR) of PP by 52.6% and total heat release (THR) by 35.4%, while substantially improving thermal stability and char quality. Moreover, gas-phase analysis confirms that phosphorus radicals (P·, PO·) and non-flammable gases (NH₃, H₂O) scavenge combustion free radicals and dilute flammable volatiles, effectively suppressing flame propagation. This study provides a novel approach to de veloping high-efficiency flame-retardant PP composites, offering new insights into the synergistic mechanisms of MXene-based hybrid flame retardants and advancing the design of eco-friendly, high-performance polymeric materials for safety-critical applications.
研究领域:
材料科学
·
高分子化学
·
燃烧科学
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高影响因子
ChemSusChem
·
2019
·Vol. 12
·期 23
·5092-5098
·
IF 7.804
Jinyan Dai,Jiang Liao,Minyi He,Mengmeng Yang,Kaipeng Wu,Weitang Yao
Graphical Inner space limited : A micro/nanostructured Si@SnS 2 -rGO (reduced graphene oxide) composite was prepared and used as anodes in lithium-ion batteries. The space-constraining effects of rGO and layered structure of SnS 2 reduced the transmission distance and diffusion barrier of Li + ions and prevented the active particles from accumulating during the electrochemical cycling and alleviated the volume expansion of the material, ensuring excellent electrochemical stability. One of the key challenges for the development of lithium-ion batteries is the preparation of high-performance anode materials. In this paper, a micro/nanostructured Si@SnS 2 -rGO composite is reported in which Si nanoparticles with a particle size of 30 nm are electrostatically anchored on a 3D reduced graphene oxide (rGO) network and mixed with SnS 2 . The step-wise lithiation/delithiation of SnS 2 provided space-constraining effects to accommodate volume expansion and particle aggregation, thereby alleviating the volume expansion of Si during cycling as well as enhancing the structural stability, whereas the rGO in the 3D network stabilized the composite. The composite had a high specific capacity of 1480.1 mAh g −1 after 200 cycles at a current density of 200 mA g −1 and a high stability at rates of 200–3000 mA g −1 . The capacity attenuation after cycling was only 89.18 %. A stable specific capacity (425.5 mAh g −1 ) was achieved after 600 cycles at a current density of 3000 mA g −1 . Therefore, the micro/nanostructured Si@SnS 2 -rGO composite is a promising anode material for use in lithium-ion batteries.
研究领域:
材料科学
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能源技术
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DOI
PubMed
高影响因子
Nanoscale
·
2025
·Vol. 17
·期 10
·6049-6057
·
IF 5.1
Jiasheng Chen,Xuanliang Wang,Zhaoping Deng,Eun Mi Kim,Sang Mun Jeong
Nanotization and surface coating of silicon (Si) particles are effective methods to mitigate volume expansion and protect the solid electrolyte interphase (SEI) film during charge and discharge cycles. We utilized a magnesium-thermal reduction process to form nano-sized Si particles and applied a simple spray solidification and calcination technique to coat the surface with carbon (Si/C). The resulting carbon-coated core-structured Si/0.01C composite, with an optimal carbon layer, exhibits outstanding electrochemical performance. Specifically, it demonstrates a discharge capacity of 3119 mA h g−1 at a current density of 0.2 A g−1 and 1010 mA h g−1 at 2 A g−1. When employed in lithium-ion batteries (LIBs), the Si/0.01C electrode maintains a discharge capacity of 1159 mA h g−1 after 173 cycles, with an impressive capacity retention of 85.8% between cycles 73 and 173, measured at 1 A g−1. This assessment of its continuous cycling performance at 1 A g−1 followed initial C-rate characterization (0.2 → 0.4 → 0.6 → 0.8 → 1 → 2 → 0.2 → 1 A g−1). The enhanced capacity and cycling stability of the carbon-coated Si/C composite compared to those of pure Si nanoparticles are attributed to the encapsulation of Si nanoparticles within the carbon layer, which mitigates volume expansion.
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PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 11
·797
·
IF 4.3
Mingbo Guo,Yijun Wang,Lei Zhang,Junran Lu,Chang Gong,Wanning Zhang,Yuxi Fang,Xinyuan Zhu,Shunai Che
Size restrictions pose increasing challenges to the acoustic performance of microspeakers in portable devices as the size of such devices, and thus the back volume of microspeakers, continues to shrink. Filling the back volume with porous materials, such as zeolites, has been proved to be an effective strategy for improving acoustic performance. In this work, hierarchically structured ZSM-5 zeolites with abundant mesopores were synthesized via the traditional hydrothermal method by adjusting the SiO2/Al2O3ratios (SAR), and their pore structures and morphologies were systematically investigated. Their acoustic enhancement performance was evaluated using a commercial microspeaker. Based on their acoustic properties, the influence of pore structure on acoustic performance was further studied. The ZSM-5 zeolite sample with an SAR of 614, which exhibited the maximum mesopore volume, demonstrated exceptional acoustic enhancement performance with a resonance offset of 199.53 Hz and an enhanced sound pressure level of 4.74 dB at 500 Hz. The presence of mesopores significantly facilitates diffusion within the zeolite crystals, enabling air molecules to access more micropores for efficient sorption–desorption processes during diaphragm vibration in microspeakers. Furthermore, supermicropores were found to contribute to improved performance by adsorbing air molecules during diaphragm vibration, complementing the role of micropores.
研究领域:
材料科学
·
声学工程
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DOI
PubMed
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2025
·
IF 5
Can Zhang,Hongyan Yin,Sui Mao,Dongyang Li,Hao Jing,Xuelei Cao,Peng Liu,Enze Li,Junwei Nan,Peter Strizhak,Linjun Huang,Jianguo Tang
Photodetectors play a crucial role in the field of optoelectronic communications and other information-related domains. Si as one of the most important materials for visible light detection, has its performance constrained by factors such as its low absorption coefficient, which limits the further enhancement of commercial photodetector performance. In this work, by employing a SnO 2 heterojunction, we have fabricated a MSM structured photodetector with a vertical PN space charge region. The photoelectrons generated in the space charge region can be accelerated onto the SnO 2 surface and achieve sensitive spectral response. By varying the thickness of SnO 2 , the thickness of the space charge layer in the detector is gradiently modulated. Together with the photo-induced potential from KPFM characterization, the key role of the space charge layer thickness is fully confirmed in performance modulation of devices. The device achieves a maximum responsivity of 0.65 A/W and a quantum efficiency of 94.6 %. More notably, the transient response of the device is below 20 ns, demonstrating the application potential of this structure in photodetectors.
研究领域:
半导体物理
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光电子学
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纳米材料
·
器件物理
·
固体电子学
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高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Siyu Fang,Tiansheng Bai,Jialin Liao,Shuai Zhang,Jiaxian Wang,Funian Mo,Wei Zhai,Zhenglin Hu,Jingyu Lu,Kwun Nam Hui,Lijie Ci,Deping Li
Lithium metal anodes hold the potential for high-energy-density batteries due to their substantial theoretical capacity, but their practical application is hindered by issues such as dendrite growth, poor cycling stability, and safety concerns. This study presents the development of a three-dimensional Li-Si composite alloy anode (Ag@Cu@Li-Si), combining a porous copper scaffold with a lithiophilic silver (Ag) layer and a lithium-silicon (Li-Si) alloy. The Ag@Cu@Li-Si composite demonstrates significant improvements in dendrite suppression, cycling stability, and electrochemical performance. The composite anode exhibits a critical current density of 15 mA cm −2 and over 900 hours of stable operation at 1.0 mA cm −2 in symmetric cells. When integrated into a full cell with a commercial LiFePO 4 cathode, it maintains excellent cycling stability, delivering over 600 cycles with a rate capability of 1.0 C. This study provides valuable insights into the design of lithium metal anodes, highlighting the importance of lithiophilic materials and 3D frameworks for high-performance lithium-metal batteries.
研究领域:
储能
·
材料科学
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电化学
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纳米技术
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电池技术
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yu Jing,Guangchao Li,Zhixing Wang,Xinhai Li,Wenjie Peng,Huajun Guo,Hui Duan,Guochun Yan,Jiexi Wang
Silicon (Si) is considered as one of the most promising candidates for next-generation lithium-ion batteries with high energy density. The main problems are the severe volume expansion and continuous interfacial side reaction of Si that hinder its further application. It can be an effective way by constructing a robust coating layer outside of Si to impede/alleviate the above effect. SiOx with high mechanical strength can largely promote the electrochemical performance of Si. Herein, Si@SiOx material with high specific surface area, high porosity, and controllable coating was synthesized via a simple solid–liquid reaction by LiOH solution etching effect. The etching/oxidation mechanism of Si under alkaline conditions was thoroughly investigated. The surface oxide layer of Si was beneficial to the formation of a solid electrolyte interphase (SEI) with excellent stability and high Li+ conductivity, while its high-porosity structure reduces the volume expansion of the material by approximately 110%. Under the synergistic effect of etching-oxidation, the modified material exhibited superior electrochemical properties. When employed as anode materials, the specific capacity was as high as 3101.5 mAh g–1 and maintained at 841.0 mAh g–1 after 500 cycles at 1 A g–1.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2024
·
IF 2.8
Jia Han,Chuanyi Wu,Yangzhou Wang,Jin Wang,Baojuan Kang,Shixun Cao,Jincang Zhang,Fei Chen
In this paper, we studied the superconducting properties of the LaSi 2 (00 l )/Si(100) single-crystalline thin films prepared by the molecular beam epitaxy (MBE) method with different thicknesses via electro-transport and magnetic properties measurements. The S50 (sample with deposition thickness around 50 nm) exhibits the highest superconducting transition temperature ( T c ) of 2.62 K, which is higher than that of the bulk LaSi 2 . The variation of T c with film thickness is within 8 %. In addition, the upper critical field ( H c2 ) increases with reducing film thickness. Especially for the thinnest LaSi 2 film with deposition thickness around 10 nm, the H c2 shows a sharp increase and the flux jump activity disappears, which is due to the defects and disorders from the interfacial effect. Our work completes the superconducting properties of LaSi 2 films, which helps to understand the influence and modulation of film thickness on superconductivity in LaSi 2 system.
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高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2016
·
IF 4.569
Qianjin Zhao,Yunhui Huang,Xianluo Hu
Si/C nanocomposites have been successfully prepared by grinding Si powders in the presence of graphite. When used as anodes for sodium-ion batteries, the as-prepared Si/C nanocomposites show significantly enhanced sodium-storage properties. In particular, the nanostructuring and close contact of the Si nanodomains and amorphous carbon enable the Si/C nanocomposites with high capacity and outstanding cyclability.
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
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DOI
高影响因子
Materials Today Sustainability
·
2022
·
IF 7.244
Jiawei Ge,Honglie Shen,Fei Zhou,Yufang Li,Wangyang Yang,Zehui Wang,Yajun Xu,Haobing Zhou,Renping Guo
Despite considerable efforts of carbon matrix for the superior structural integrity of Si anode of lithium-ion batteries, Si/C architectures with thick carbon layer suppress its ion kinetics. The design of Si/C architectures with thin carbon layers is promising for superior ion/charge kinetics but still arouses its deterioration in structural stability due to the agglomeration of Si nanoparticles (SiNPs). Herein, SiNPs are dispersed on large-sized graphene (Si/G@C) with robust linkings, which effectively suppresses the self-limiting effect due to the dispersed SiNPs on graphene. Finite element analysis reveals well-dispersed SiNPs in Si/G@C provide enough room for accumulating its volume variations. Even, the accumulated stress in relatively dense regions of SiNPs is relieved via self-deformed graphene. Thin carbon layers are grown on SiNPs of Si/G@C for low ion diffusion barriers , in agreement with density function theory simulation. Meanwhile, an electrical network and high electrical-field response on the interface of Si and carbon layers improve its charge transfer. Therefore, the prepared Si/G@C shows superior rate capability (1127.1 mAh/g at 4 A/g), capacity retention (∼74.56% after 303 cycles at 1A/g) and low electrode swelling (∼3.60% after 303 cycles). This design of Si/G@C sheds light on the preparation of advanced Si-based anode in lithium-ion battery.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
锂离子电池
·
固态物理
·
界面工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）