MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 8
·571
·
IF 5.4
Sun Juan,Nie Zheng,Wu Fangjun,Lai Fujie,Chen Shaoyang,Wang Yang,Jiang Yong
A highly sensitive fluorescent lateral flow immunoassay (LFIA) was developed for SARS‑CoV‑2 IgG detection. Polystyrene (PS) microspheres were synthesized via emulsion polymerization, doped with dipyridamole (Dip), and coated with a protective silica (SiO 2 ) shell through a sol–gel process. After amine functionalization, the SARS‑CoV‑2 nucleocapsid (N) protein was covalently immobilized onto the microsphere surface using EDC/NHS chemistry, yielding PS@Dip@SiO 2 –N fluorescent probes. The LFIA strip enabled one‑step detection within 15 min. Under optimized conditions (N protein conjugation concentration of 40 µg/mL), the strip showed excellent specificity with no cross‑reactivity against other human coronaviruses (NL63, OC43, 229E). Quantitative determination based on the T/C grayscale ratio fitted the Hill equation (R² = 0.9782). The detection limit for SARS‑CoV‑2 IgG was 10 ng/mL, approximately two orders of magnitude lower than that of a commercial colloidal gold‑based LFIA strip. This platform provides a rapid, sensitive, and low‑cost solution for point‑of‑care serological screening of COVID‑19. Graphical abstract
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DOI
PubMed
高影响因子
SURFACE AND INTERFACE ANALYSIS
·
2026
·
IF 2.7
Huiling Jia,Yuequan Jian,Jiayi Lv,Jinxiu Wu,Xiaoxiong Ma
The double-shell P (MMA-MPS)/SiO 2 /CeO 2 composite abrasive was designed and prepared through the soap-free emulsion polymerization, the sol–gel method, and the in situ chemical precipitation method. Take 3-(methacryloyloxy)propyltrimethoxysilane-modified methyl methacrylate (P (MMA-MPS)) microspheres as the core. The a SiO 2 and b SiO 2 inner shells were coated on the core in acidic and alkaline environments, respectively. The CeO 2 outer shell was then deposited on the inner shell. The morphology, structure, and chemical mechanical polishing performance on KDP crystals of composite abrasives were characterized using SEM, TEM, XRD, FTIR, XPS, and AFM. The results indicate that the P (MMA-MPS)/ a SiO 2 /CeO 2 abrasive possesses the “loose net-like” inner shell of a SiO 2 with the positive charge (-Si-OH 2 + ), leading to the sparser outer shell of CeO 2 and the expanded CeO 2 lattice. After polishing, the surface roughness (Ra) of KDP crystal is 0.69 nm, and the material removal rate (MRR) is 125.6 nm/min. The P (MMA-MPS)/ b SiO 2 /CeO 2 abrasive possesses the “dense strawberry-like” inner shell of b SiO 2 with the negative charge (-Si-O − ), which facilitates the uniform deposition of Ce 3+ through electrostatic adsorption, and forms the dense, complete and highly crystalline outer shell of CeO 2 . The proportion of Ce 3+ is increased by 2.5%. After polishing, the Ra of the KDP crystal further decreases to 0.43 nm, and the MRR increases to 146.2 nm/min. In summary, the comprehensive performance of the P (MMA-MPS)/ b SiO 2 /CeO 2 abrasive is superior to that of the P (MMA-MPS)/ a SiO 2 /CeO 2 abrasive.
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DOI
高影响因子
POLYMER
·
2026
·
IF 5.1
Desen Ren,Shaopeng Jiang,Chen Xiao,Zhencheng Yang,Biao Jiang,Ding Zhang
To address the high bioaccumulation and serious environmental risks of conventional long-chain fluorine-containing textile modifiers, this study prepared perfluoro branched short-chain fluoroalcohol using perfluoroalkyl ethyl acetate as raw material, further synthesized hyperbranched fluorinated polyurethane, and compounded it with nano-SiO 2 to obtain an eco-friendly and durable superhydrophobic composite modifier for cotton fabrics. By regulating the degree of branching of hyperbranched polyurethane and the dosage of nano-SiO 2 , the synergistic optimization of micro/nano structures and low-surface-energy components on the fabric surface was realized. Characterization results showed that the polymer possessed a narrow molecular weight distribution and controllable degree of branching; a moderate degree of branching was more favorable for the full exposure of fluorocarbon segments and stable bonding with cotton fibers. Uniform micro-nano rough structures were formed on the surface of modified fabrics, with a maximum water contact angle of 153.5 ± 0.8° and a sliding angle of 5.0°. The fabric possessed an initial decomposition temperature of approximately 200 °C and favorable air permeability, which meets the requirements of daily applications. It retained excellent hydrophobicity after mechanical abrasion, repeated laundering, acid–alkali immersion, and UV irradiation. This short-chain fluorinated modifier exhibited lower bioaccumulation and toxicity, integrating superhydrophobicity, high durability, and environmental friendliness, and can be used as a green alternative to traditional long-chain fluorine finishing agents.
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DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Lifeng Han,Haorun Li,Kunming Hou,Yan Guo,Hao Wu,Mengbo Zou,Yulu Wang,Zhihua Guo,Huangdong Wang,Guixiang Ma,Shangpeng Liu,Xiaojun Gu,Shanghong Zeng
Industrial fly ash-derived SiO 2 aerogel with abundant mesopores has an excellent ability to support active ingredients for constructing efficient and stable catalyst in electrochemical CO 2 reduction reaction (CO 2 RR). However, how to select and arrange active sites on its surface poses significant challenges due to its non-conductive nature. Here, we subtly designed and synthesized multi-component architectures to achieve the high efficiency of CO 2 RR to CO. The embedding of active and amorphous nitrogen-doped carbon (NC) nanosheets on the surface and inside of SiO 2 aerogel ensures the charge transport on the catalyst surface, and Er 2 O 3 improves dissociation of H 2 O, enabling the supply of protons for CO 2 RR. Simultaneously, Er 2 O 3 -induced defects/vacancies, nanoclusters coordinated with N on amorphous NC and single Ni in NC play crucial role in enhancing adsorption and activation of CO 2 . Consequently, the Ni-Er 2 O 3 /NC-SiO 2 catalyst exhibits the maintenance of FE CO higher than 95 % over a wide potential window (−0.22 to −1.12 V vs. RHE) in a flow cell with gas-liquid-solid electrode. This work not only provides an atomistic understanding of nature of active sites in CO 2 RR but also contributes to the secondary utilization of industrial fly ash for a carbon-neutral future.
研究领域:
材料科学
·
电化学
·
环境工程
·
催化
·
可持续能源
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DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Xiangjun Li,Yuxin Shi,Miaomiao Li,Shengwei Deng,Yinxia Dong,Libo Tong,Zhongze Du,Kuaishe Wang
The exceptional protection of epoxy resin (EP) is restricted in practical applications due to high electrical insulation and inherent microporous defects. In this study, acid-doped polypyrrole (f-PPy)/MXene hybrid nanomaterials incorporated into the EP matrix to construct three-dimensional (3D) conductive network that simultaneously enhances corrosion resistance and imparts antistatic capability. Electrochemical impedance measurements demonstrate a long-term stability, maintaining 9.73 × 10 10 Ω cm 2 even after 14 days of immersion, which is significantly higher than the EP coatings. Compared with pure EP, the composite SiO 2 @f-PPy/MXene/EP coating shows a 3 times reduction in surface resistivity (8.68 × 10 7 Ω m) and exceeds the industrial antistatic threshold by two orders of magnitude. The enhanced anticorrosion is attributed to the synergistic contribution of the triple properties of the SiO 2 @f-PPy/MXene: “labyrinth effect”, redox effect and corrosion inhibition. SiO 2 @f-PPy/MXene 3D conductive network enhances the antistatic ability of EP. This dual-functional strategy addresses the critical gap of combining anticorrosion and antistatic performance in EP coatings and offers a practical route for protective applications on Mg alloys.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mengmeng Yang,Zhao Zhao,Wei Hu,Lihao Liu,Heng Cai,Hongchao Liu,Bohang An,Min Li,Qiong Wu,Zhaofeng Chen
The rapid development of industry and transportation has given rise to serious noise pollution, which posing serious threats to the social economy and human physical and mental health. However, commonly existing fibrous noise absorption materials with single pore-structure are limited by their large density, poor sound absorption ability, which are difficult dissipation of noise at low frequency. Herein, gradient-structured fire-resistance elastic ceramic nanofiber aerogels with dual scale structure at micro and macro levels are success-fully structured through step-by-step directional freeze-casting technology. The macro gradient pore structure improved the noise injection, and self-assembly nano network constructed by SiCnw improved the acoustic contact area of aerogel. In addition, the good thermal conductivity of SiCnw helps to convert sound energy into heat energy and quickly dissipate heat, further improving the sound absorption effect. The noise reduction coefficient of the obtained ceramic fibrous aerogels reaches 0.55, and the maximum value of the sound absorption coefficient can be close to 1. In addition, the hydrophobic group in the binder gives the aerogel good mechanical properties (60% compressibility) and super hydrophobic properties (water contact angle ≈136°). The successful construction of lightweight, hydrophobic, fire-resistant gradient structure aerogel will provide a new prospect for the upgrading of the next generation noise absorber.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Wentao Guo,Xi Lan,Yongli Jin,Ziqi Ding,Jintao Gao,Zhancheng Guo,Zengwu Zhao
The irreplaceability role of rare earths in high-performance materials, such as ceramics, highlighting the significance of rare earth extraction. Strengthening the crystallization growth of the rare earth phase in rare earth slag is crucial for ensuring effective subsequent rare earth enrichment and separation. However, viscosity plays a major role in the characteristics of high-temperature melts and the crystallization process. In this study, an internal column rotation method was used to measure the viscosity of CaO-SiO 2 -CaF 2 -Ce 2 O 3 slag melts. The effect of shear rate on the rheological behavior of CaO-SiO 2 -CaF 2 -Ce 2 O 3 slag with varying Ce 2 O 3 and CaF 2 contents, and CaO/SiO 2 ratio was investigated by examining the viscosity evolution during the rare earth crystallization growth process. The rheological behavior of the CaO-SiO 2 -CaF 2 -Ce 2 O 3 slag was elucidated in regions of liquid phase, low solid phase, and high solid phase, providing insight into the viscosity changes of non-Newtonian flowing melts. Based on this, the effect of shear rate on the crystallization behavior of rare earth phases was investigated to provide a basis for improving the subsequent separation of rare earth phases.
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 29
·e52648
·
IF 3.057
Zhonglan Cui,Yan Zhang,Chenkai Zhu,Lixiang Song,Jicheng Wang,Qianhong Jin,Qunchao Su,Dongming Qi
The dispersion and orientation arrangement of functional polymers with fillers are critical to their performance. However, there are rare detailed researches on the visualization of the orientation process about functional fillers in composite melts and the mechanistic effects on performance. In this work, it explored the change process of the orientation morphology for polyacrylate/silica (PAcr/SiO 2 ) composite microspheres in polymethyl methacrylate (PMMA) at different melting temperatures. Afterwards, the morphology and distribution of oriented microfibers in composite fibers melted at different temperatures were observed by transmission electron microscope (TEM). The results showed that composite microfibers could be formed in tight arrangement and obtained average orientation of 50.88 in the composite fibers at 250°C. Under this circumstance, the addition of nano SiO 2 particles had no effect on the rheological type. Meanwhile, the shear stress was 99.29% higher than that of pure PMMA system under the same conditions. As for the elongation at break, it was found that the elongation at break of the composite fiber prepared at 250°C was 169.43% higher than that of pure PMMA. Therefore, it provided a new method to achieve well dispersion of functional fillers in molten systems. Furthermore, it was beneficial to enhance the elongation at break of functional composites.
研究领域:
材料科学
·
高分子科学
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DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Yu Jiang,Yu Shang,Wei Zhang,Xiangling Zhang,Jiangyun Li,Senlin Shao
The widely used SiO 2 and TiO 2 nanoparticles (NPs) can accumulate in industrial wastewaters , thereby posing challenge to biological wastewater treatment processes. In this work, the performance of aerobic granular sludge (AGS) reactors fed with wastewater containing 50 mg L −1 SiO 2 and TiO 2 NPs were investigated. The results showed that the granules could resist the NPs in wastewater (no disintegration of granules was observed). SiO 2 NPs had a negative effect on the settleability of granules, with the SVI 30 increased by 64.5% and protein secretion decreased by 29.9%. To the contrary, the settleability of granules was improved in the presence of TiO 2 NPs due to the increase of the protein secretion. Possibly because of the compact and layered structure of granules, in the presence of both types of NPs, no obvious reduction of the overall removal efficiency of organics was found, and nanoparticle-resistant strains were enriched. The overall nitrification and denitrification efficiencies were hardly affected by SiO 2 NPs while significantly inhibited by TiO 2 NPs. Some functional genera, such as Hyphomicrobium and Acidovorax , showed growth inhibition with TiO 2 NPs, which might be responsible for the reduction of nitrification and denitrification efficiencies.
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2017
·
IF 6.844
Ping Hu,Wan-Zhong Lang,Xi Yan,Lian-Feng Chu,Ya-Jun Guo
VO X -doped porous SiO 2 solids (VO X -SiO 2 ) were synthesized at different gelation and calcination temperatures through an in-situ one-step synthesis and evaluated by non-oxidative propane dehydrogenation (PDH), exhibiting excellent catalytic performance. VO X -SiO 2 catalysts were characterized by XRD, low-temperature N 2 adsorption/desorption, SEM, TEM, UV–Vis, Raman, XPS, NH 3 -TPD, H 2 -TPR, and TGA. The structural and performance results for the catalysts reveal that gelation temperature has only a slight effect on the surface acidity, textural properties and VO X species dispersion of VO X -SiO 2 catalysts within a reasonable temperature range (30–60 °C). The 60-VO X -SiO 2 -580 catalyst, with a gelation temperature of 60 °C, a calcination temperature of 580 °C, and prepared by the one-step synthesis method, obviously shortens gelation process time by half compared to catalyst gelled at 30 °C and exhibits superior catalytic performance for PDH . Over high gelation temperature (≥75 °C) leads to the loss of integrity and decreases catalytic activity of the VO X -SiO 2 catalysts. Compared with the VO X -MCM-41 catalyst prepared by a one-step hydrothermal method, VO X -SiO 2 catalysts exhibit better catalytic activity and stability. Importantly, at a reaction temperature of 580 °C, the 60-VO X -SiO 2 -580 catalyst exhibits remarkable long-term catalytic stability in the eight reaction-regeneration cycles for PDH. Its propane conversion shows a slow decrease from 55% to 45% for a 4 h reaction duration, but the propene selectivity remains at approximately 91%. The results of this work will be beneficial for further industrial development and application of porous VO X -SiO 2 solids in catalysis.
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2023
·Vol. 34
·期 6
·1918-1932
·
IF 3.4
Yuqian Du,Xueya Wang,Ziwen Zhou,Feng Zhao,Song Li,Zhihua Liu,Zhengyu Wu,Shuai Zhao,Lin Li
Nowadays, although highly conductive polymer composites filled with two-dimensional graphene-based nano-fillers have been explored extensively, constructing nanocomposites with high performance, industrial feasibility, and more efficient conductive networks at lower nano-filler contents remains a challenge. To achieve the above objectives, industrial wastes microsilica powder (N98) with amorphous spherical structure and large particle size is employed in this work. And the hybrids (TGN) are obtained between N98 and graphene (GE) by the effective bridging and interface coupling of tannic acid, which can achieve the purpose of obtaining conductive composites with low-filler contents by traditional polymer processing technologies. The volume exclusion effect of N98 and its own assisted dispersion effect can prevent and attenuate graphene agglomeration, enabling the formation of a dense, complete and uniform conductive network in natural rubber (NR) matrix based on a small amount of graphene addition (parts per thousand). Thus, it give the nanocomposite highly functional, especially electric property. The results show that when the ratio of GE to N98 hybridization is 1:20, N98 and graphene are more uniformly hybridized together, and the volume exclusion effect is best matched with the rubber composites, and the comprehensive performance is optimal. Moreover, the electrical conductivity of NR/TG 1 N 20 nanocomposite can reach the balanced value of 10 −3 S·cm −1 with the GE loading of 0.48 phr, which shows the effectiveness of the prepared hybrids.
研究领域:
高分子科学
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纳米复合材料
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功能高分子
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材料化学
·
导电聚合物
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DOI
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 5
·1538-1547
·
IF 6.367
Ruyan Lei,Yanping Yang,Chenjuan Yu,Yinsi Xu,Yuanzhuo Li,Jun Li
In order to improve the electrochemical performance and efficiently prepare a solid polymer electrolyte (SPE) for the lithium-metal battery (LMB), a fumed SiO2 (FS) with surface Si–OH group was used to fabricate FS-modified poly(ethylene oxide) (PEO)–LiClO4-based SPE by a facile preparation process. The influences of the FS content on the morphological properties, thermal properties, lithium salt dissociation, mechanical properties, and electrochemical properties of SPE were systematically analyzed. Results indicate that FS with the hydrophilic property was widely distributed throughout the amorphous phase of SPE, thus the crystallinity of SPE was reduced to 25.83% when the FS mass loading was 6.85 wt%. In addition, a greater dissociation degree of lithium salt was achieved after the addition of FS, and a higher ion conductivity of 3.03 × 10−4 S cm−1 and Li-ion migration number of 0.396 were recorded at 60 °C. The all-solid-state Li/SPE/Li coin cell showed excellent stable cyclability (380 h) and the LiFePO4 (LFP)/SPE/Li coin cell demonstrated good discharge specific capacity and coulomb efficiency of 96 mA h g−1 and 100.2%, respectively, after 100 cycles of galvanostatic charge–discharge operation under 0.5C at 60 °C. Thus, based on collective results, it is expected that SPE presented in this work is a promising electrolyte for next-generation high-energy all-solid-state LMB with enhanced safety.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
固态离子学
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DOI
高影响因子
危险品化学品经营许可证（带存储）