ACS Omega
·
2025
·
IF 4.3
Hushuan Huo,Zihang Shao,Xiangwei Meng,Shiyu Lv,Tao Li,Xudong Huang,Zengxi Wei,Qian Sun,Shuangliang Zhao
Pesticides are widely used to ensure crop yields and quality in agriculture. However, most pesticides are easily decomposed, leading to the overuse of pesticides for long-lasting control of pests and diseases, which pose serious hazards to the environment and human health. Herein, we propose a strategy to prepare hollow porous silica nanoparticles (SiO2 NPs) using 1,3,5-trimethylbenzene (TMB) as a pore-expanding agent and CaCO3 NPs as templates. The hollow SiO2 NPs obtain an average particle size of 121 nm and a shell thickness of approximately 15 nm and can be easily prepared with adjustable pore sizes ranging from 1.4 to 4.6 nm without using any surfactants. More importantly, these SiO2 NPs can be used for pesticide encapsulation and controlled release, achieving an encapsulation efficiency of 47% for avermectin and 38% for pyraclostrobin as well as outstanding ultraviolet shielding abilities. Based on the above results, a new release model is built to precisely predict and analyze the pesticide release of SiO2 NPs, showing that the experimental results are consistent with the predicted outcomes, which are further verified by the release performance by the SiO2 NPs with various BET surface areas. Our release model is promising for accurately predicting the drug release performance of hollow porous materials.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chengzhen Fu,Hailu Wang,Hongxing Zhan,Yuanbing Li,Shujing Li,Bo Yin
To enhance the mechanical strength and high-temperature dimensional stability of CaO–SiO 2 ceramic fiber boards, composite ceramic fiber boards were fabricated via vacuum filtration with quartz particles of varying content and particle sizes. Results show that moderate quartz addition reinforces the interwoven fiber skeleton, increases bulk density, and significantly improves compressive strength—from 1.41 MPa (without quartz) to 3.53 MPa at 60 wt% quartz. Finer particles (d 50 = 5.8 μm) further enhance strength, reaching 5.68 MPa, due to better pore filling and higher packing density. Quartz also improves thermal stability through high-temperature expansion, effectively mitigating shrinkage. A mathematical model based on composite linear shrinkage was established to predict dimensional changes between 1000–1400 ℃, with good agreement between calculated and experimental values. This study reveals the reinforcement mechanism of quartz in CaO–SiO 2 ceramic fiber composites, offering theoretical and practical guidance for the design of high-performance thermal insulation materials.
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高影响因子
POLYMER
·
2025
·
IF 4.5
Shiyi Liu,Hao Hu,Min Sha,Ding Zhang,Biao Jiang
A novel fluorinated methacrylate monomer (FMA) containing perfluorinated branched-short chain groups was successfully synthesized, and core-shell emulsions with different fluorine contents were prepared by two-step seed emulsion polymerization. The fluorinated polyacrylate (PFA) emulsion was characterized by fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) and transmission electron microscopy (TEM). By using of the prepared fluorinated polyacrylate (PFA) emulsion and silica sol, a convenient one-step spray method that led to substrates with efficient water repellency was developed. The water contact angle (WCA) of these coatings was up to 152°, and the water droplets can fall off freely. In addition, several varies substrates were coated and all of them exhibited superhydrophobicity in order to verify the universality of the coating, and the coatings had good adhesion on these substrates. The coated cotton fabric also had certain anti-fouling properties and acid-base resistance. These substrate independent coatings have the potential to be used in many fields.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Longlong Geng,Gang Li,Xiuling Zhang,Xiangmei Wang,Chunhui Li,Zhongmin Liu,Da-Shuai Zhang,Yong-Zheng Zhang,Guangyin Wang,Haixiang Han
Morphology and surface property are critical property-defining factors for metal oxide catalysts, therefore, the rational engineering on these aspects is considered as the effective means to enhance their overall catalytic activities. In this work, a silicon oxide (SiO 2 ) with hierarchical structure was successfully prepared and applied as carrier for the design of SiO 2 -supported copper oxide catalysts (CuO/SiO 2 -x, x represents treating temperature of SiO 2 during preparation). The morphology and composition of thus-obtained catalysts were characterized by XRD , SEM, HRTEM , XPS , FTIR , contact angle and N 2 adsorption. Interestingly, even with relatively large CuO particles , excellent activity was also achieved in hydrogenation of nitrophenol under relatively mild conditions (25 °C and 1 atm). Over the optimal CuO/SiO 2 -800 catalyst, the 4-nitrophenol (4-NP) conversion reached 99% in 60 s and its hydrogenation rate was about 9.2 times that of bare CuO catalyst. Additionally, it could also be reused for at least eight times without obvious fading in efficiency. The excellent catalytic performance can be attributed to the synergy between surface-anchored structure in which more active sites can be exposed, and hydrophilic surface to promote the adsorption and diffusion of substrate molecules during hydrogenation process.
研究领域:
催化化学
·
材料科学
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yang Hu,Yan kui Cheng,Shuang Li,Lunfeng Liu,Xiaoyan Lin
Oily dyeing wastewater poses significant environmental hazards and therefore requires effective treatment. Although electrospun fiber membranes (EFMs) have been employed for oily dyeing wastewater treatment, conventional approaches typically involve a two-step process. This study presents a novel single-step modification method for EFMs, enabling efficient treatment of oily dyeing wastewater through a simplified single-membrane separation process. Experimental results demonstrated that spontaneous self-assembly occurs between ethyl cellulose (EC) colloids and hydrophilic SiO₂ nanoparticles in mixed solutions. Furthermore, these self-assembled colloids can undergo liquid-phase-induced self-organization on polyacrylonitrile (PAN) electrospun fiber membranes (EFMs), leading to a "welding" effect that firmly immobilizes both EC and hydrophilic SiO₂ nanoparticles onto the PAN fibers.The self-assembly process effectively prevented the agglomeration of SiO₂ nanoparticles, resulting in their uniform and stable fixation on the PAN fibers. Compared to the pristine PAN EFM, the PAN-EC-SiO₂ EFM exhibited significantly enhanced tensile strength, pH tolerance, surface roughness, hydrophilicity, hydration capacity, and methylene blue adsorption performance. Consequently, this modified membrane demonstrated dual functionality, effectively separating both oil-water emulsions and oily dyeing wastewater. During oily dyeing wastewater treatment, the PAN-EC-SiO₂ EFM achieved a methylene blue rejection rate of 92 %, an oil separation efficiency of 97.2 %, and a high flux of 153 L/m²·h.
研究领域:
环境科学
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膜技术
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纳米技术
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化学工程
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材料科学
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Yanghong Liu,Yunzhen Chang,Ying Zhang,Yanping Li,Wenjing Hou,Sheng Zhu,Kan Hang,Gaoyi Han
The conservation of sandstone cultural relics has gained increasing attention due to their scarcity, historical and cultural value. However, they exhibit a vulnerability that must endure degradation caused by prolonged outdoor exposure, particularly the hazards caused by water infiltration. Herein, we have designed and developed a hydrophobic composite coating for safeguarding outdoor-exposed sandstone relics. The coating has integrated the silica nanoparticles modified by perfluorodecyl triethoxysilane (FAS-17) with fluorinated resin and polymethyl methacrylate (PMMA) to achieve waterproofing for outdoor-exposed sandstone. The protective effect of the coating has been systematically evaluated through water contact angle (WCA) measurements under various environmental tolerances such as acid rain resistance, mechanical bearing capacity, and adaptability for wide temperature range adaptability (-20 ℃ and 80 ℃). The tested results demonstrate that the coating on sandstone shows superhydrophobic ability and stability. For example, the coating exhibits exceptional hydrophobicity (WCA > 150°) and self-cleaning properties after various accelerated aging cycles such as under acidic rain, mechanical peeling, sand impact, high and low temperature environments. Importantly, the coating on sandstone can preserve the inherent permeability of sandstone substrates while providing robust interfacial adhesion. These outcomes highlight the potential of the FAS-SiO 2 based composite coating as a durable and compatible coating for mitigating outdoor environment-induced deterioration in sandstone cultural heritage conservation.
研究领域:
文化遗产保护
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材料科学
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表面工程
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环境科学
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纳米技术
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Heng Wang,Shichao Li,Yeqing Liu,Yuhang Liu,Tianliang Tan,Zhishen Yin,Xiaoyong Su,Duo Chen,Jialiang Li,Zhanjun Wu
Epoxy resin (EP) adhesive performance is critical for the glass fiber-reinforced composites (GFRP) in the Membrane-Type liquefied natural gas (LNG) cargo containment systems (CCS). In this work, the polyurethane-modified epoxy resin (EPU) and Nano-SiO 2 were introduced into EP to develop a resin system with enhanced bonding strength and durability for bonding glass fiber and aluminum foil. The results demonstrated that the peel strength of the EP/EPU50/2 wt.% Nano-SiO 2 -GF reached 3.78 kN m −1 at room temperature (RT), which was approximately 172% higher than that of EP-GF (1.39 kN m −1 ). Even at −190°C, the peel strength remained 2.66 kN m −1 . The continuous flexible polyurethane phase dissipated mechanical energy through chain extension and hydrogen bonding, while the Nano-SiO 2 improved the crack propagation resistance, thus enhancing adhesion. In addition, after 30 days of exposure to ultra-low temperature (−196°C) and 40 thermal cycles, the peel strength of EP/EPU50/2 wt.% Nano-SiO 2 -GF at RT still reached 2.92 kN m −1 and 3.53 kN m −1 , respectively. SEM analysis revealed that ultra-low temperature could induce interfacial debonding between the resin layer and aluminum foil. The transition of failure mode from cohesive failure to adhesive failure was the main reason for the decrease in peel strength.
研究领域:
材料科学
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高分子化学
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复合材料工程
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低温工程
·
界面粘附力学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chen Zhang,Benzheng Gao,Qi Li,Xin Wang,Jianliang Xie
Porosity is a characteristic feature of atmospheric plasma–sprayed (APS) coatings that strongly influences their physical and functional properties. However, studies on its effect on the electromagnetic (EM) performance and high-temperature stability of microwave-absorbing coatings (MACs) remain limited. In this work, FeSiAl/CaO–B 2 O 3 –SiO 2 composite coatings with different porosities were fabricated by adjusting powder feed rate (PFR). Microstructural evolution, EM properties, and isothermal oxidation behavior of prepared composite coatings were systematically investigated. Results show that increasing PFR reduces the extent to which particles are melted, leading to higher porosity due to the retention of unmelted particles. The increased porosity disrupted local conductive networks, altered the complex permittivity and permeability, and lowered the bonding strength of the coatings. Moreover, pores and cracks facilitated oxygen diffusion, accelerating oxidation and crack propagation at elevated temperatures. After high-temperature oxidation, the decrease in complex permittivity improved impedance matching and broadened the absorption bandwidth. These findings provide new insights into microstructure–property relationships of APS-deposited MACs and offer a strategy for tailoring the coating porosity to simultaneously optimize their EM absorption performance and high-temperature oxidation resistance.
研究领域:
材料科学
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表面工程
·
功能材料
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高温防护
·
电磁学
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Haochuan Wang,Xin Liu,Hui Xie,Chong Wang,Wei Wang,Jinxiang Hong,Pan Feng
The poor dispersion of nano-SiO₂ in shotcrete systems limits its effectiveness and can even lead to detrimental effects. To address this issue, ettringite suspension was introduced as a novel dispersion carrier. Nano-SiO₂ was found to physically adsorb onto ettringite crystals, significantly improving its spatial distribution without organic dispersants. Compared to direct nano-SiO₂ addition, the incorporation of ettringite—especially via premixing—markedly enhanced performance. With premixed nano-SiO₂ and ettringite, and nano-SiO₂ content ranging from 0.25 % to 1 %, the 6-hour compressive strength increased by 93∼600 %, while the initial and final setting times were reduced by 46∼79 % and 47∼91 %, respectively, compared to the control. Isothermal calorimetry, quantitative X-ray diffraction (QXRD), and thermogravimetric analysis (TG) confirmed that the well-dispersed nano-SiO₂ accelerates early cement hydration by providing abundant nucleation sites facilitating rapid formation of hydration products, mainly calcium silicate hydrate (C–S–H). Simultaneously, ettringite acts not only as a dispersant but also strengthens the early-age framework, enhancing load transfer within the shotcrete matrix.
研究领域:
建筑材料学
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水泥基材料
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混凝土技术
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纳米材料应用
·
土木工程材料
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DOI
高影响因子
Journal of CO2 Utilization
·
2025
·
IF 8.4
Ruifeng Zhou,Zhou Yang,Xitong Yang,Menglong Zhang,Jiahui Gao,Sajjad Hussain,Qiuye Li
Owing to their cost-effectiveness and high efficiency, solid amine adsorbents derived from solid waste are deemed highly promising for CO 2 capture. Nevertheless, traditional solid waste-based adsorbents are predominantly limited by their uniform pores structure, which significantly hampers the kinetics of CO 2 adsorption-desorption. In this study, we innovatively introduce an efficient method for recovering Si elements via alkali leaching and subsequently synthesize hierarchical porous SiO 2 through gas-phase-assisted precipitation and self-assembly, forming a distinctive "lamellar-spherical stacking structure". This unique hierarchical porous architecture enables the efficient incorporation of pentaethylenehexamine (PEHA) organic amines, thereby minimizing pore blockage due to amine functionalization and alleviating mass transfer resistance during adsorption and desorption. The resultant solid amine-functionalized hierarchical porous structures exhibit a CO 2 adsorption capacity of 4.815 mmol/g at 70 °C and maintain remarkable stability over 10 cyclic tests. Thus, the rational design of pore effects and functionalized molecular configurations synergistically enhances the CO 2 adsorption capacity in flue gas and stability, offering robust technical support for the application of solid amine CO 2 adsorbents.
研究领域:
环境科学
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材料科学
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化学工程
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能源技术
·
吸附分离
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DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Peng Jin,Xinyi Li,Liya Zhang,Wei Wang,Yuhong Zhang,Yi Wu,Zhengguang Sun,Yuan Zhan
Room temperature phosphorescent (RTP) materials have promising application in display lighting, environmental monitoring, and information encryption. In this study, a series of RTP halogen doped carbon dots/SiO 2 composites (RTP X-CDs/SiO 2 , X = F, Cl, Br, I) with long lifetime and tunable particle size were successfully prepared by two-step process involving solvothermal and calcination. The effects of various halogen dopants on the phosphorescence properties and morphologies of the RTP X-CDs/SiO 2 composites were thoroughly investigated. Among them, RTP F-CDs/SiO 2 exhibit an ultra-long lifetime of 1.28 s, a phosphorescence quantum yield of 19.76 %, and remarkable stability against temperature variations, acid and alkali conditions, and exposure to polar solvents. Therefore, RTP F-CDs/SiO 2 were further incorporated into silicone resin to fabricate phosphorescent films, and optical and hydrophobic properties of films with varying RTP F-CDs/SiO 2 mass fractions (2.5 %–15.0 %) were systematically explored. The films demonstrate excellent fluorescence and RTP performance, highlighting their potential for advanced anti-counterfeiting and information encryption.
研究领域:
材料科学
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光学材料
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纳米技术
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信息安全
·
化学合成
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DOI
高影响因子
Coatings
·
2025
·Vol. 15
·期 9
·985
·
IF 2.8
Jie Fang,Rongqing Dong,Meng Zhou,Lishan Liang,Mingna Yang,Huakun Xing,Yongluo Qiao,Shuai Chen
Poly (3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) stands out as a renowned commercial conducting polymer composite, boasting extensive and promising applications in the realm of film electronics. In this study, we have made a concerted effort to overcome the inherent drawbacks of PEDOT:PSS films (especially, high moisture absorption, mechanical damage vulnerability, insufficient substrate adhesion ability, etc.) by uniformly blending them with polydimethylsiloxane polyurea (PDMS-PUa) and silica (SiO2) nanoparticles through a feasible mechanical stirring process, which effectively harnesses the intermolecular interactions, as well as the morphological and structural characteristics, among the various components. The Si−O bonds within PDMS-PUa and the −CH3groups attached to Si atoms significantly enhance the hydrophobicity of the composite film (as evidenced by a water contact angle of 132.89° under optimized component ratios). Meanwhile, SiO2microscopically modifies the surface morphology, resulting in increased surface roughness. This composite film not only maintains high conductivity (1.21 S/cm, in contrast to 0.83 S/cm for the PEDOT:PSS film) but also preserves its hydrophobicity and electrical properties under rigorous conditions, including high-temperature exposure (60–200 °C), ultraviolet (UV) aging (365.0 nm, 1.32 mW/cm2), and abradability testing (2000 CW abrasive paper, drag force of approximately 0.98 N, 40 cycles). Furthermore, the film demonstrates enhanced resistance to both acidic (1 mol/L, 24 h) and alkaline (1 mol/L, 24 h) environments, along with excellent self-cleaning and de-icing capabilities (−6 °C), and satisfactory adhesion (Level 2). Notably, the dried composite film can be re-dispersed into a solution with the aid of isopropanol through simple magnetic stirring, and the sequentially coated films also exhibit good surface hydrophobicity (136.49°), equivalent to that of the pristine film. This research aims to overcome the intrinsic performance drawbacks of PEDOT:PSS-based materials, enabling them to meet the demands of complex application scenarios in the field of organic electronics while endowing them with multifunctionality.
研究领域:
材料科学
·
高分子科学
·
电气工程
·
表面工程
·
纳米技术
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高影响因子
危险品化学品经营许可证（带存储）