MICROCHIMICA ACTA
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2025
·Vol. 192
·期 8
·1-12
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IF 5.3
Huang Xiao-Qing,Wang Mao-Yu,Wang Xiao-Chen,Shi Xin,Li Rui-Wen,Wu Shuang,Li Ying
A surface-imprinted polymer SiO 2 @Eu(DBM) 3 phen/SMIP has been synthesized using enrofloxacin (ENFX) as the template molecule, methacrylic acid as the functional monomer, and the complex Eu(DBM)₃phen as a fluorescent moiety. The structure and the fluorescence sensing properties of SiO₂@Eu(DBM)₃phen/SMIP have been investigated in detail. The resulting material exhibited high selectivity, a low detection limit of 3.07 µM, and a linear working range from 20 to 100 µM for ENFX. The obtained fluorescence probe demonstrates good selectivity and sensitivity toward ENFX and has the potential for significant application in ENFX detection by simplifying procedures and reducing interference from impurities. In addition, the detection mechanism of the fluorescent probe was also discussed. The results indicate that it is feasible to use SiO 2 @Eu(DBM) 3 phen/SMIP for the detection of ENFX as well as its effective adsorption. This study explores the self-assembly of rare-earth complexes on silica via a surface imprinting technique, which provides a new solution for the subsequent development of the surface blotting technique. Graphical
研究领域:
分析化学
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材料科学
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荧光光谱学
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表面印迹技术
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环境监测
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Dewei Ma,Panli Zhu,Jun Huang,Xiuhua Cao
The research on low-temperature lead-free glass is of great significance for the miniaturization, integration and intelligence of current electronic products, as well as environmental protection. In this article, we report the preparation of low-temperature lead-free B 2 O 3 -BaO-ZnO-SiO 2 -Al 2 O 3 -TeO 2 glasses by a melt-quenching technique. With the increase of TeO 2 content in glass, the glass transition temperature and melting temperature of sintered glass powder decrease, while its wettability and acid corrosion resistance show an increasing trend. The application of glass powder in the sintering experiment of terminal electrode slurry further proves this viewpoint. Compared with the poor sintering performance of the slurry with TeO 2 -free glass powder, the slurry containing TeO 2 glass powder forms a very dense sintered solid, and the sintered slurry is tightly bonded to the ceramic substrate .
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2024
·
IF 4.5
Wei Liu,Zuyang Zhang,Daoyin Liu
SiO 2 /TiO 2 core/shell particles are effective photocatalysts, whose performance strongly depends on TiO 2 film thicknesses. Fluidized bed atomic layer deposition (FBALD) can precisely control film thickness at the sub-nanometer scale. In this work, TiO 2 films with different thicknesses are deposited on SiO 2 particles via different ALD cycles at 180 °C in a fluidized bed reactor. TEM images indicate that complete and uniform nanoscale TiO 2 films (0.7–6.4 nm, corresponding to 5–50 ALD cycles) are formed on SiO 2 surface. The TiO 2 film with about 3.9 nm is found to exhibit the highest photocatalytic characteristics by degrading rhodamine-B (RhB) and tetracycline (TC), and the photocatalytic activity is further maintained above 90% after 6 cycles of photocatalytic reaction. Suitable TiO 2 film thickness shows minimal charge transfer resistance, resulting in enhanced photon adsorption and separation of electrons and holes, thus improving photocatalytic performance. This work provides an effective way to tune the photocatalytic performance via FBALD.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Lingxiao Yan,Hongyan Wang,Zhe Sun,Lulu Wang,Chenying Li,Song Xue,Qiang Liu
Lithium battery (LIB) separators are integral components of lithium batteries, serving the crucial function of separating the positive and negative electrodes within the batteries, thereby enabling the passage of lithium ions. In general, lithium-ion battery (LIB) separators must exhibit excellent wettability, ionic conductivity, and heat resistance. In this study, commercial polypropylene (PP) separators were modified through the application of a coating comprising polyethylene imine (PEI)-functionalized silica nanoparticles. In particular, a silane coupling agent (KH560) was used to create epoxy groups on the surface of nanosilica, which was then subjected to a chemical cross-linking process with PEI through the ring-opening reaction between epoxy groups and amino groups. It was observed that the modified PP separator displayed augmented wettability, electrolyte absorption rate, and ionic conductivity, which in turn enhanced the cycling and rate performance and other electrochemical properties of the lithium-ion battery. In particular, the optimized sample (1.6 wt %) exhibited the highest specific capacity (151.1 mAh g–1@1C,LiFePO4||Li) at 1C in comparison to the unmodified commercial PP (142.5 mAh g–1@1C,LiFePO4||Li). Additionally, the modified PP separator demonstrated enhanced thermal stability in comparison to that of the pristine PP separator, thereby ensuring the stable operation of lithium-ion batteries even under extreme conditions.
研究领域:
材料科学
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能源技术
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 5
·e56428
·
IF 2.7
Benyuan Yu,Zhongbao Wang,Jie Sun,Jialiang Li,Xin Lei,Shichao Li,Tao Sun,Zhanjun Wu
Multifunctional carbon fiber composite materials capable of storing energy and carrying structural loads have advantages for aerospace structures. In this paper, a structural supercapacitor that consists of an epoxy-based solid polymer electrolytes (E-SPEs) and carbon fiber was proposed. To develop an E-SPEs with better mechanical properties and ionic conductivity, Nano-SiO 2 was introduced into the solid polymer electrolytes. Nano-SiO 2 reinforced E-SPEs (Nano-SiO 2 /E-SPEs) show improved mechanical properties (Young's modulus [ E ] = 0.85 GPa) and ionic conductivity (4.99 × 10 −4 S cm −1 ), compared to E-SPEs without Nano-SiO 2 . Structural supercapacitors were further prepared by combining E-SPEs with carbon fibers. The structural supercapacitor prepared with Nano-SiO 2 /E-SPEs exhibits the higher power and energy density (261.93 W kg −1 and 2.11 Wh kg −1 ) compared to the structural supercapacitor prepared with E-SPEs without Nano-SiO 2 (51 W kg −1 and 0.34 Wh kg −1 ), indicating improved mechanical and energy storage properties for structural supercapacitors after incorporation of Nano-SiO 2 . This strategy has great potential in enhancing performance of structural energy storage composite materials for application in next-generation aerospace vehicles.
研究领域:
材料科学
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航空航天工程
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能源存储技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qicheng Xue,Nanxi Dong,Peiqi Fan,Daolei Lin,Guofeng Tian,Jun Liu,Jiaming Wei,Shengli Qi,Dezhen Wu
The extreme temperatures encountered in aerospace pose formidable challenges to the performance of elastic materials in spacecraft and related apparatus. Traditional organic insulation materials face hindrance due to inadequate fire resistance, while inorganic insulation materials are often brittle. Herein, we designed binary-network composite aerogels with dual-crosslinked PI nanofibers as the scaffold and uniformly distributed silica nanoparticles within the anisotropic aerogel matrix. Owing to the dual-crosslinked PI nanofiber network, the resulting PI@SiO 2 aerogel can withstand 1000 cycles of radial fatigue testing under 50 % compressive or buckling strains, maintaining structural stability across a wide angular frequency range of 0.1–100 rad/s. DMA testing shows that PI@SiO 2 aerogel can endure 100,000 fatigue cycles from 25 to 300 °C, with storage modulus and loss modulus, and damping ratio, indicating robust long-term performance over a wide temperature spectrum. Even with liquid nitrogen (−196 °C) and butane torch flames (1100 °C), PI@SiO 2 aerogel preserves its superelasticity through repeated compressions. Moreover, the composite aerogel exhibits excellent thermal insulation , with low thermal conductivity (27.2 mW m −1 K −1 ), and reachs the top flame-retardant level (UL94-V0). This work not only establishes a novel pathway for constructing polymer-based materials with temperature-invariant superelasticity but also holds great promise for extensive applications in ongoing and near-future aerospace exploration.
研究领域:
材料科学
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航空航天工程
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产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Lu Ye,Changning Ran,Zhihui Xie,Jianjun Zhang,Sude Ma
Improving the limited energy storage capacity of dielectric materials has long been an attractive challenge. In this work, a four-phase hybridized nanocomposite was designed. The linear polymer polyimide (PI) was added to the ferroelectric polymer polyvinylidene fluoride (PVDF) and compounded with a nanoceramic BT@SiO2 with a core–shell structure. The results show that PVDF–PI/BT@SiO2 nanocomposites prepared by a straightforward spin-coating method have a significantly increased discharge energy density. The polymer blends obtain a tightly extended conformation in the amorphous region. Also, this provides an excellent matrix environment for the homogeneous dispersion of fillers. The core–shell structure, as a physical barrier, not only hinders the expansion of the breakdown path but also extends multiple polarization surfaces with gradient variations at the microscopic level. Therefore, the synergistic effect generated by polymer blending and core–shell structure effectively enhances the dielectric and stored energy characteristics of nanocomposites. The dielectric constant is stable at 11.39–18.7, and the dielectric loss is always lower than 0.136. The discharge energy density is 2.5 J/cm3, almost 110% higher than that of the BOPP films (about 1.2 J/cm3). These experimental results suggest that the composite system using core–shell structure and polymer blending is a new way to improve the energy density of dielectric materials.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Qinglei Wu,Chenyang Shen,Kaihang Sun,Menghui Liu,Chang-jun Liu
Tuning the hydrogenation activity of Pd is an effective method to achieve selective hydrogenation of acetylene. The previous study shows that Pd has a strong interaction with In 2 O 3 , causing a significant change in the electronic structure of the palladium catalyst. Herein, Pd/In 2 O 3 @SiO 2 was prepared by a deposition-precipitation method for selective hydrogenation of acetylene. After the reduction by flowing hydrogen, Pd-In intermetallic compounds can be formed. The concentration of the formed intermetallic compounds is closely associated with the reduction temperature. The Pd-In intermetallic compounds suppress the hydrogen activation ability of Pd and significantly weaken the adsorption of ethylene. Especially, a weak adsorption of di-σ-bonded ethylene is observed, which facilitates the desorption of ethylene and promotes the ethylene selectivity in the semi-hydrogenation of acetylene. The experimental study confirms that there exists an optimum reduction temperature (250 °C) for the formation of the Pd-In intermetallic compounds, with which ∼ 80 % ethylene selectivity and 100 % acetylene conversion have been achieved at 140 °C.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
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2024
·Vol. 14
·期 35
·25481-25489
·
IF 3.9
Lei Dong,Xin Shu,Qianping Ran
Incorporating nano-SiO2 particles into cement paste has garnered significant attention for enhancing the performance of hardened cement paste. However, the agglomeration of nanoparticles in the pore solution of cement–water system poses a challenge for cost-effective and efficient applications. Meanwhile, superplasticizers containing phosphate groups exhibit strong complexation with calcium ions and show promise in improving the dispersion performance. This study introduces a surface chemical modification technique to enhance the dispersibility of nano-SiO2. Firstly, poly(isoprenyl oxy poly(ethylene glycol) ether-random-vinylphosphonic acid) (PTPEG–VPA), a silanized superplasticizer containing phosphate moieties, is copolymerized and chemically grafted onto pristine nano-SiO2 surfaces through condensation and silanization processes. The resulting core–shell SiO2@PTPEG–VPA nanoparticles are comprehensively characterized using FT-IR spectroscopy, TGA, DLS, TEM, BET surface area analysis, and zeta potential measurements. The results indicate that introducing phosphate moieties improves the dispersion capacity of grafted copolymers, thereby reducing the severe agglomeration of nano-SiO2 in solution. Subsequently, the impact of SiO2@PTPEG–VPA on cement hydration and early-age strength development is investigated using microcalorimetry and TGA characterization. Finally, a mechanism is proposed to explain the observed retarding effects of grafted PTPEG–VPA on pristine SiO2. Overall, this study provides novel insights into the chemical design of nanoparticles, aimed at manipulating cement paste properties.
研究领域:
材料科学
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土木工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
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2025
·
IF 3.1
Huan Wang,Cen Shi,Liangliang Yin,Yanqin Ji
To remove lutetium from wastewater, superparamagnetic Fe 3 O 4 @SiO 2 –HOPO nanoparticles were successfully synthesized, containing approximately 460 μmol·g −1 of 3,2-HOPO. The material demonstrated high stability in 0.1 mol·L −1 HNO 3 and retained 97 % of its adsorption capacity after five cycles. The nanoparticles showed strong selectivity for lutetium, with minimal interference from coexisting ions in different matrices. This selective adsorption was primarily due to monodentate or multidentate chelation of 3,2-HOPO on the particle surface with lutetium. Adsorption equilibrium was achieved within 15 min, with a maximum capacity of 29 mg·g −1 , highlighting its potential for large-scale wastewater treatment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Zhen-wei Guo,Yan-fen Mo,Xiao-ning Tang,Yu-hui Xie,Dong Feng,Feng Wu,Yi Mei,Delong Xie
The development of natural rubber (NR) gloves with superior antibacterial and enhanced mechanical properties is critical for safeguarding healthcare personnel. In this study, Ti-based MXene (Ti 3 C 2 T x ) nanosheets were employed for the first time as an antibacterial agent to improve the antimicrobial performance of NR. Through SiO₂ intercalation via electronic assembly, the antibacterial efficacy of MXene was significantly boosted, achieving 100 % lethality against E. coli and 90.95 % against S. aureus . Mechanistic studies revealed that silica nanoparticles primarily enhanced MXene's ability to induce physical damage and generate reactive oxygen species (ROS). The positively charged MXene-SiO₂ nanosheets were then incorporated into negatively charged natural latex to form NR nanocomposites with a hierarchical MXene structure. Compared to pristine NR, the nanocomposites exhibited 100 % lethality against E. coli and 74.72 % against S. aureus with the addition of just 0.5 phr MXene-SiO₂. Furthermore, the mechanical properties of NR were enhanced, with the modulus at 50 % and 100 % strain increasing by 22 % and 15 %, respectively, while elongation at break improved to 790 %. This work not only presents a novel approach for enhancing the antibacterial and mechanical properties of NR, but also deepens the understanding of MXene's antibacterial mechanism and its potential applications in healthcare materials.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 2
·225
·
IF 4.6
Jieqiong Wang,Jingyi Yang,Zezheng Bing,Yuanyuan Gao,Tao Yang,Qiaoyun Liu,Meng Zhang,Zhongyi Liu
Controllable hydrogenation of carbonyl groups (C=O) is crucial for converting furfural into high-value furfuryl alcohol. Instead of traditional impregnation method, a novel Cu-based catalyst (Cu/SiO2) is prepared using the ammonia evaporation method (AE) for the efficient hydrogenation of furfural to furfuryl alcohol under mild conditions. At the reaction conditions of 90 °C and 1 MPa H2, the 5Cu/SiO2-AE sample showed optimal performance with higher turnover frequency (36.0 h−1) and furfuryl alcohol selectivity (>99.9%). After five cycles, the catalyst recycled still showed a high reaction activity and selectivity for furfuryl alcohol. Characterization results such as XRD, H2-TPR, FT-IR, and XPS showed that the excellent catalytic performance of 5Cu/SiO2-AE catalyst was attributed to the formation of layered copper silicate and the high dispersion of Cu species. Furthermore, the formation of layered copper silicate resulted in a higher ratio of Cu+/(Cu0+Cu+) at a reduction temperature of 250 °C, which was also responsible for the optimum activity. This work showed the importance of controllable synthesis of layered copper silicate in improving the catalytic performance of copper-containing catalyst.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）