CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Bing Liu,Haiming Li,Zihao Song,Hongyan Li,Jingguo Liu,Dongqing Wei,Xiaolan Liao,Huan Li
Although SiO 2 aerogels have broad application prospects in the field of thermal insulation coatings, their fragile structure is easily collapsed and damaged due to capillary forces during preparation and coating processes. While surface hydrophobic treatment can alleviate this damage to some extent, it simultaneously reduces the compatibility of the aerogel with the coating matrix, hindering its uniform dispersion in the system, thus creating a contradiction. Here, we introduced wrinkled-porous core-shell SiO 2 aerogel fiber composites (WP-PLA/CA-SiO 2 ), fabricated via electrospinning using polylactic acid (PLA) and cellulose acetate (CA) as shell materials and SiO 2 sol as the core precursor. Thermal insulation coatings were prepared based on these fibers. The robust outer shell of the fibers effectively protected the internal aerogel from damage caused by capillary forces during the preparation and application of coatings. Crucially, the surface pores on the shell served as unidirectional channels, facilitating the release of internal gases during the drying process while effectively preventing the entry of external moisture. Simultaneously, the wrinkled fiber morphology functioned as a strain energy storage device, offsetting internal drying stress by releasing the stored strain. This synergistic triple-action mechanism ensured that the aerogel fibers maintained excellent structural integrity and were relatively uniformly dispersed within the coating matrix. As a result, the coating exhibited superior thermal insulation performance (with a maximum surface temperature of only ∼45 °C after 60 min of heating) and excellent storage stability (>6 months). This work provides a transformative strategy to overcome the key obstacles hindering the application of aerogels in the coatings field.
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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2025
·
IF 2
Liu Shuai,Liu Fang,Guan Liandi,Zhang Jianwei
BF is a promising reinforcing material for resin matrix composites. Still, it fails to fully utilize its excellent mechanical and functional properties due to the weak interfacial bonding between BF and the resin matrix. In this work, the fibers were treated by acid and alkali synergistically with nano-infiltrant (containing nano-SiO 2 ) to improve the inertness of the fiber surface and enhance the interfacial bonding. Then, BFFC was prepared by hand-coating bisphenol F epoxy resin on the surface of BFF. The microstructure, mechanical properties, durability, thermal stability, and sound absorption properties of the composites were investigated. The results showed that the acid and alkali synergistic nano-infiltrant-modified BF surfaces showed excellent interfacial bonding with increased roughness and reactive groups, which effectively revised the bonding strength between BF and the resin matrix. In particular, the tensile strength, durability, and thermal stability of the composites with alkali synergistic nano-infiltrant were revised by 59.8%, 45.9%, and 48.1%, respectively, compared with the untreated samples, and the structure of the composites was also optimized to enhance the sound-absorbing performance, reaching an average sound absorption coefficient of 0.49. In future, it can promote the development of BF composites toward multi-functionalization.
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BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
·
2025
·
IF 3.8
Kiguchi Manabu,Wang Jingshen,Yuxin Li,Zhang Dan,Liang Zhongoing,Ma Mei,Fujishima Akira,Hanada Nobuhiro
Nano-sized magnetic photocatalysts (nano TiO2-SiO2/Fe3O4) with a particle size of approximately 20 nm were developed for efficient water treatment. Their photocatalytic performance was comparable to the nano particle photocatalysts, P25. Furthermore, the photocatalysts could be conveniently separated from treated water using a magnet. We then applied the photocatalysts to photokilling of Lactobacillus casei and degradation of persistent herbicides (simetryn, prometryn, metolachlor, and sulfometuron methyl). Lactobacillus casei, a Gram-positive bacterium lacking an outer membrane, was introduced and validated as a reliable model bacterium for photocatalytic antibacterial assessments. Complete photokilling of Lactobacillus casei occurred within 50 minutes of UV irradiation, demonstrating simpler kinetic behavior compared to traditionally used Gram-negative model organisms. The photocatalysts also exhibited effective degradation toward four persistent herbicides. Their concentrations decreased from 10 ppm to below 1 ppm within 120 minutes.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 18
·e56826
·
IF 2.8
Xiaohui He,Zengwei Qin,Defu Chen
Solid polyelectrolytes (SPEs) have garnered considerable attention and extensive research due to their exceptional flexibility, low cost, and ease of industrial production. This study synthesized bis-imidazole cationic functionalized benzonorbornadiene block copolymers rP(NB-MGE- b -BenzoNBD-BisIm + TFSI − ) via ring-opening metathesis polymerization (ROMP). The block copolymers were blended with lithium trifluoromethanesulfonate (LiTFSI) and nano SiO 2 to prepare the composite solid polyelectrolytes membrane (CSPEMs) rP(NB-MGE- b -BenzoNBD-BisIm + TFSI − )/LiTFSI/SiO 2 by a solution casting method for applications in lithium-ion batteries (LIBs). This research investigates the effect of different nano-SiO 2 content on the ionic conductivity and electrochemical stability of the composite SPEs. The relationship between the intrinsic structure and properties of rP(NB-MGE- b -BenzoNBD-BisIm + TFSI − )/LiTFSI/z wt% SiO 2 ( z = 0, 2.5, 5.0, 7.5) was studied. When the SiO 2 content is 5.0 wt%, the maximum ionic conductivity reaches 9.3 × 10 −5 S cm −1 at 30°C and 1.5 × 10 −3 S cm −1 at 80°C. The NCM811/CSPEM/Li battery exhibits an initial reversible discharge capacity of 149.7 mAh g −1 at a current density of 0.2 C, with a coulombic efficiency maintained above 96%. After 50 cycles at a current density of 0.2 C, the capacity remains at 148.9 ± 8 mAh g −1 , with the coulombic efficiency continuing to exceed 96%, which demonstrating robust cycling stability.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Cuirong Yan,Hongyan Ma,Xiunan Cai,Zhongqiu Luo,Jinyu Shi,Wenhao Li,Xintao Zhou
High-valent iron-oxo complexes show promise as green oxidants for water remediation, but suffer from critical limitations in stability and pH adaptability. Herein, we report a facile method to synthesize amorphous SiO 2 -stabilized high-valent iron-oxo complexes via Na + diffusion activation of iron/silicon-rich copper smelting slag. In the complex, the synergistic coexistence of two distinct silica‑oxygen tetrahedral configurations-basic Na 2 SiO 3 and acidic SiO 2 oxides establishes a self-regulating pH buffering system that stabilizes solution neutrality. This unique structural design ensures sustained oxidative activity of the complex, representing a significant advancement over conventional silica-supported catalysts due to its intrinsic acid-base regulatory capability. Thus, the deactivations of the oxidants including the proton-induced self-decomposition and the hydrolysis of iron by hydroxyl groups can be efficiently inhibited, thereby expanding the pH applicability (3–11). High-valent iron species can be continuously regenerated during peroxymonosulfate (PMS)-triggered reactions for the selective and efficient oxidation degradation of tetracycline hydrochloride (TC, 98.01% in 15 min) via non-radical pathway. Through methyl phenyl sulfoxide-directed oxidation, electron spin resonance, Mössbauer spectroscopy, and density functional theory calculations, the stabilizing mechanism of silicon was elucidated, confirming that the high valent iron-oxo act as the dominant active species. This work advances both hazardous waste valorization and high valent iron-oxo complex engineering, offering a robust solution for organic pollutant removal in complex aquatic environments.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Zhi Wang,Dongquan Leng,Yan Zhang,Tingting Wu,Hongmin Ma,Xiang Ren,Zhen Yu,Qin Wei
Aflatoxin B1 (AFB1) poses severe threats to human health even at trace levels, necessitating the development of rapid and sensitive detection methods. This work presents an innovative self-powered photoelectrochemical aptasensor for ultrasensitive AFB1 monitoring. Specifically, zinc phthalocyanine-sensitized MgIn 2 S 4 as a high-performance photoanode, where the sensitization narrows bandgap and extends light absorption, generating enhanced photocurrent for biological detection. Furthermore, Au@CuGaO 2 as a stable photocathode that provides abundant biomolecule binding sites while circumventing the false-positive issues inherent in conventional anodic sensing platforms. Notably, SiO 2 @Tb-MOF as a dual-function quencher that simultaneously competes for visible light excitation and creates steric hindrance to block electron donor access, achieving significant signal amplification. The synergistic effects of these components yield exceptional analytical performance, including an ultra-wide linear range (0.01 pg/mL to 100 ng/mL) and a low detection limit (0.0032 pg/mL). The satisfactory anti-interference, reproducibility and stability provide a solid foundation for the application of this sensing platform.
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PubMed
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COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Youquan Ling,Junjie Liu,Bolin Xiao,Hui Jin,Luxiang Zhao,Yanjiang Bai,Xi Zhang,Mei Liang,Yang Chen,Huawei Zou
In this study, carboxymethyl cellulose (CMC), a polymer abundant in hydroxyl and carboxyl groups, was employed as an interfacial layer between polyimide fibers and EPDM rubber. The formation of hydrogen bonds between CMC and the polyimide fibers facilitated a robust encapsulation of CMC on the fiber surface. Additionally, a greater number of SiO 2 nanoparticles were adsorbed onto the CMC surface through hydrogen bonding and condensation reactions, significantly enhancing the fiber's surface roughness and the matrix's wettability. This strong mechanical interlocking structure markedly improved the interfacial adhesion and mechanical properties of the composites. Specifically, the H pull-out force, tensile strength, and elongation at break increased by 84.8 %, 89 %, and 45 %, respectively, compared to the control samples. In-situ electron microscopy further confirmed that the reinforced interface effectively inhibited crack propagation along the interface. Low-field NMR analysis revealed that the enhanced interfacial bonding restricted the mobility of rubber molecules, contributing to higher strains and stresses during the orientation hardening phase under tension. Moreover, the improved interfacial adhesion and the incorporation of SiO 2 within the interfacial layer also enhanced the ablative resistance and thermal insulation properties. These findings demonstrate that the CMC/SiO 2 encapsulation strategy represents an environmentally friendly, rapid, and efficient interfacial modification method for polyimide fiber-reinforced EPDM insulation materials.
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GREEN CHEMISTRY
·
2025
·
IF 9.2
Man Yang,Shuhao Qin,Youchang Yang,Mingmi Wu,Ting Lei,Yufei Liu,Huiju Shao
Owing to the global transition toward carbon neutrality, lithium-ion batteries (LIBs) are experiencing unprecedented demand growth as key energy storage components. A contact-electro-catalysis (CEC) method has been utilized in recycling spent LIBs for some time due to the process economy, efficiency and environmental sustainability. However, systematic investigations into the effects of the microstructure and surface chemical environment of dielectric materials on their catalytic activity in the CEC process remain scarce. Here, we demonstrated that the metal leaching efficiency simultaneously depended on the size and porous structure of SiO2 microspheres. Appropriate size and narrow distribution could dominantly diminish the scattering intensity of ultrasonic waves to gather energy and then facilitate the formation of cavitation bubbles to generate abundant electrons and radicals. Similarly, the porous structure also promoted the generation of electrons and radicals by enhancing aqueous-phase contact interfaces. Moreover, we manipulated the surface chemical environment of porous SiO2 microspheres by incorporating sodium alginate (SA) and polyethyleneimine (PEI). Hydroxyl, carboxyl and amino groups and –COO−/–NH3+-microstructures not only accelerated electron transfer from water molecules to SiO2 microspheres, inducing hydroxyl radicals, but also boosted electron transfer from SiO2 microspheres to O2, generating superoxide radicals. Consequently, under the experimental conditions established in this study, approximately 100% leaching efficiency of metals in the spent ternary cathode was achieved in 8 h at 80 °C due to the synergistic effect of hydroxyl and superoxide radicals. We anticipate this innovative strategy will significantly expand the applicability of CEC in LIB recycling, thereby addressing the growing global demand for sustainable LIBs.
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BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Guifen Jie,Junjun Ge,Xiaoshan Gao,Chunli Li
In this work, we designed a new strategy for ultrasensitive detection of CEA based on efficient electrochemiluminescence (ECL) quenching of Ru(bpy) 3 2+ -doped SiO 2 nanocomposite by ferrocene using target recycling amplification technique. A large number of [email protected] 2 ECL signal probe were firstly assembled on the novel magnetic core−shell Fe 3 O 4 @Au nanoparticles (NPs), then the ferrocene-labeled ECL quenching probe (Fc-probe) was linked to the magnetic NPs. Finally, numerous DNA1 sequences were produced by target CEA-triggered multiple recycling amplification and displaced the Fc-probe on the magnetic NPs, leading to significantly enhanced ECL signal for CEA detection. Because of the designed cascade signal amplification strategy, the newly developed method achieved a wide linear range of 10 fg/mL to 10 ng/mL with a low detection limit of 3.5 fg/mL. Furthermore, taking advantages of the magnetic Fe 3 O 4 @Au NPs for carring abundant signal probes, sensing target and ECL detection, the developed ECL strategy is convenient, rapid and displayed high sensitivity for CEA detection, which has great potential for analyzing the clinical samples in practical disease diagnosis applications.
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Materials Today Energy
·
2024
·
IF 9
Xiao-Jie Kang,Hui Zhang,Cheng-Yu He,Bao-Hua Liu,Yong-Zhi Zhang,Xiang-Hu Gao
Polymer-based materials emerge as promising building blocks for passive daytime radiative cooling (PDRC) due to their affordability and ease of production. Enhancing these polymers with inorganic particle doping has shown to boost their mechanical properties and light scattering ability, a result of the increased refractive index contrast with air. However, the incorporation of a single type of inorganic particle often falls short in optimizing overall performance. Herein, we introduce a novel approach by simultaneously integrating high refractive index zirconium dioxide (ZrO 2 ) and wide band gap silicon dioxide (SiO 2 ) dielectric particles into polydimethylsiloxane (PDMS) matrix. This dual-particle strategy synergistically improves the radiative cooling capabilities of the resulting photonic film. Remarkably, with a thickness of 1,000 μm, it achieves an impressive 96.7% reflection of solar irradiance , while maintaining a high emissivity of 95.2% in the atmospheric window . Under solar intensity of ∼836.7 W/m 2 , it delivers an average cooling power of 82.42 W/m 2 , achieving a substantial sub-ambient temperature drop of up to 8.26 °C. We further explored its effectiveness in enhancing freshwater collection efficiency, leveraging its radiative cooling properties. Furthermore, the photonic film also exhibits versatile properties including flexibility, hydrophobicity , thermal stability, color scalability, and weather resistance, thus enhancing its suitability for various practical applications.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Youwei Yang,Jingyu Zhang,Yueqi Gao,Busha Assaba Fayisa,Antai Li,Shouying Huang,Jing Lv,Yue Wang,Xinbin Ma
The efficient hydrogenation of CO 2 -derived ethylene carbonate (EC) to yield methanol (MeOH) and ethylene glycol (EG) is a key process for indirect conversion of CO 2 to MeOH. However, a high H 2 /EC molar ratio during the hydrogenation process (usually as 180–300) is generally required to achieve good catalytic performance, resulting in high cost and energy consumption for H 2 circulation in the promising industrial application. Here, we prepared a series of Ni-modified Cu/SiO 2 catalysts and explored the effects of synthesis methods and Ni contents on catalytic performance under different H 2 /EC molar ratios. The Cu/SiO 2 catalyst with 0.2% (mass) Ni loading prepared by co-ammonia evaporation method exhibited above 99% conversion of EC, 91% and 98% selectivity to MeOH and EG respectively at H 2 /EC ratio of 60. And no significant deactivation was observed within 140 h at a lower H 2 /EC of 40. It is demonstrated that a few of Ni addition could not only promote Cu dispersion and increase surface Cu + species due to the strong interaction between Cu and Ni species, but also form uniformly-dispersed CuNi alloy species and thus enhance the adsorption and dissociation of H 2 . But the excess Ni species would aggregate and segregate to cover partial surface of Cu nanoparticles , leading to a significantly drop of catalytic performance in EC hydrogenation. These insights may provide guidance for further design of catalysts for the ester hydrogenation reactions.
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Chinese Physics B
·
2020
·Vol. 29
·期 7
·078401
·
IF 1.223
Zerong Liang,Bingchu Yang,Anyi Mei,Siyuan Lin,Hongwei Han,Yongbo Yuan,Haipeng Xie,Yongli Gao,Conghua Zhou
SiO2 nanoparticles were used to regulate the crystallizing process of lead halide perovskite films prepared by the sequential deposition method, which was used in the low-temperature-processed, carbon-electrode-basing, hole-conductor-free planar perovskite solar cells. It was observed that, after adding small amount of SiO2 precursor (1 vol%) into the lead iodide solution, performance parameters of open-circuit voltage, short-circuit current and fill factor were all upgraded, which helped to increase the power conversion efficiency (reverse scan) from 11.44(± 1.83)% (optimized at 12.42%) to 14.01(±2.14)% (optimized at 15.28%, AM 1.5G, 100 mW/cm2). Transient photocurrent decay curve measurements showed that, after the incorporation of SiO2 nanoparticles, charge extraction was accelerated, while transient photovoltage decay and dark current curve tests both showed that recombination was retarded. The improvement is due to the improved crystallinity of the perovskite film. X-ray diffraction and scanning electron microscopy studies observed that, with incorporation of amorphous SiO2 nanoparticles, smaller crystallites were obtained in lead iodide films, while larger crystallites were achieved in the final perovskite film. This study implies that amorphous SiO2 nanoparticles could regulate the coarsening process of the perovskite film, which provides an effective method in obtaining high quality perovskite film.
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