Russian Journal of Physical Chemistry A
·
2021
·Vol. 95
·期 12
·2471-2477
·
IF 0.691
Li Yongtao,Wang Dehao,Liu Liqing,Liu Yuzhou,Shi Chenyong,Zhang Hongguang,He Xuemin,Ma Yanwen
Abstract Carbon-coated SiO 2 hollow nanospheres with different thickness of carbon layers have been synthesized using PAA as template and phenolic resin as carbon source. The hollow structure provides space for the bulk expansion of SiO 2 when it works in lithium ion batteries. The carbon layer on the surface of SiO 2 hollow nanosphere significantly inhibits the bulk expansion of SiO 2 and improves the lithium ion transfer rate. By comparing silica materials coated with carbon layers of different thicknesses, it was found that HSiO 2 @C-2 used as anode material in lithium-ion batteries exhibited the best electrochemical performance. It achieves a reversible capacity of 748.1 mA h g –1 after 250 cycles and shows excellent rate capability and excellent cycling stability. This is attributed to the improved diffusion conditions of lithium ions due to the suitable thickness of carbon layer, which effectively increases the electronic conductivity of the anode material.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 34
·期 5
·055101
·
IF 3.953
Yijun Wu,Zhiqiang Sun,Jinfeng Song,Liufang Mo,Xiaochen Wang,Hanhan Liu,Yunfeng Ma
A targeted drug delivery system was developed to accumulate specific drugs around tumor cells based on the redox, temperature, and enzyme synergistic responses of mesoporous silica nanoparticles. Mesoporous silica nanoparticles (MSN-NH2) and Doxorubicin (DOX) for tumor therapy were prepared and loaded into the pores of MSN- NH2 to obtain DOX@MSN(DM NPs). Hyaluronic acid (HA) was used as the backbone and disulfide bond was used as the linker arm to graft carboxylated poly (N-isopropylacrylamide)(PNIPAAm-COOH) to synthesize the macromolecular copolymer (HA-SS-PNIPAAm), which was modified to DM NPs with capped ends to obtain the nano-delivery system DOX@MSN@HA-SS-PNIPAAm(DMHSP NPs), and a control formulation was prepared in a similar way. DMHSP NPs specifically entered tumor cells via CD44 receptor-mediated endocytosis; the high GSH concentration (10 mM) of cells severed the disulfide bonds, the hyaluronidase sheared the capped HA to open the pores, and increased tumor microenvironment temperature due to immune response can trigger the release of encapsulated drugs in thermosensitive materials. In vitro and in vivo antitumor and hemolysis assays showed that DMHSP NPs can accurately target hepatocellular carcinoma cells with a good safety profile and have synergistic effects, which meant DMHSP NPs had great potential for tumor therapy.
研究领域:
纳米技术
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药学
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癌症研究
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生物医学工程
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DOI
PubMed
高影响因子
NUCLEAR ENGINEERING AND DESIGN
·
2024
·
IF 1.9
Chenchen Niu,Aiqing Chen,Kaiwen Hu,Kai Xu
Due to its long half-life, high fission yield, and high mobility in the groundwater, Technetium-99 (Tc-99) is a troublesome nuclide in nuclear waste. Moreover, the primary concern is the high volatility of Tc during nuclear waste vitrification. Previous studies demonstrated that nitrate significantly affected the Tc volatilization during the vitrification of Tc-containing waste. However, identifying how nitrate affects Tc volatilization is challenging due to the complexity of the composition of nuclear waste. This study used a simplified SiO 2 -KNO 3 -KReO 4 feed with rhenium (Re) as a Tc non-radioactive surrogate to study the nitrate effect on the Re volatilization at elevated temperatures. The results showed that KNO 3 could facilitate Re volatilization at temperatures below 800 °C when the molar percentage of KNO 3 in the KNO 3 -KReO 4 binary system exceeded 60 mol%, which was attributed to the eutectic reaction between KReO 4 and KNO 3 at 310 °C. However, the increased KNO 3 content could inhibit the Re volatilization at temperature above 1200 °C since adding KNO 3 could increase the amorphous phase content, where Re was encapsulated and hardly evaporated.
研究领域:
核化学
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环境科学
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Hao Han,Jinyu Dai,Zhiqiang Shi,Xiaohong Zhang,Jun Song,Ming-Hua Xie,Xiu-Li Yang
Volatile organic compounds (VOCs) threaten both human health and the environment. Catalytic oxidation is an effective purification method, yet its efficiency is often compromised by water vapor present in industrial exhausts. To address the persistent issues of active site deactivation and restricted mass transfer under humid conditions, a hierarchical SiO 2 NF@MnO 2 catalyst was fabricated via combined electrospinning and hydrothermal synthesis. The hydrophobic SiO 2 nanofibers, with surface hydroxyl density tuned by calcination, effectively suppressed water adsorption, while the in situ-grown ultrathin MnO 2 nanosheets (<7 nm) provided abundant edge-active sites for toluene activation. Water resistance tests confirmed the optimized competitive adsorption between water and toluene on SiO 2 NF500@MnO 2 , sustaining over 73% toluene conversion at 230°C under 5 vol% H 2 O for 50 h. This work provides a design paradigm for water-resistant VOCs catalysts and advances the rational design of robust environmental catalysts.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2026
·
IF 5.2
Zedong Li,Fang Zhao,Lingmu Zeng,Xiaobin Luo,Peihang Yu,Xinyan Tao,Jiacheng Li,Baosheng Du,Yang Ren,Xiaowei Zhou,Zhu Liu
SiO 2 coating enhanced the thermal stability and oxidation resistance of CNTF with suppressed thermal-affected zones. • SiO 2 incorporation reduceｓ C 2 plume emission intensity and plume expansion velocity. • The SiO 2 coating increases C m of CNTF by 29.2%, attributed to improved thermal confinement and reduced excessive mass ejection. Carbon nanotube films (CNTFs) hold considerable potential as carbon-based propellants; however, their energy-conversion efficiency is constrained by rapid heat diffusion and inefficient utilization of ablation products. Herein, we report a surface-engineering approach employing SiO 2 -mediated thermal confinement to modulate the ablation characteristics of CNTFs. CNTF/SiO 2 composite films with varying SiO 2 contents are fabricated via vacuum-assisted infiltration followed by thermal conversion. Comprehensive structural characterization confirms the formation of a relatively continuous SiO 2 coating with interfacial SiC x O y species on the CNTF scaffold. Time-resolved plasma imaging reveals that SiO 2 incorporation suppresses C 2 plume expansion velocity from 13,448 ± 6 to 9703 ± 30 m/s and extends the characteristic decay time from 24.4 ± 0.6 to 32.3 ± 3.1 ns, evidencing moderated plasma relaxation dynamics. Thermogravimetric analysis shows that the SiO 2 coating elevates the oxidation onset temperature from ~500 to 600 °C, while post-ablation SEM observations reveal substantially reduced ablation crater dimensions and heat-affected zones. The optimized CNTF/SiO 2 -3 achieves an impulse coupling coefficient of 31 μN⋅W −1 , representing a 29.2% improvement over pristine CNTF. This improvement is attributed primarily to the SiO 2 thermal confinement which is consistent with a more controlled ablation process and reduced C 2 emission. A more efficient conversion of laser energy into directed momentum is proposed as an interpretation. Our results demonstrate that inorganic oxide coatings offer a promising strategy for designing high-performance carbon-based propellants for laser ablation propulsion. Download: Download high-res image (649KB) Download: Download full-size image
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124748
·
IF 7.5
Zaodong Sun,Yuanqiang Xu,R. Hugh Gong,Binjie Xin,Yuansheng Zheng
High-temperature air filtration requires filter that simultaneously offer thermal stability, high filtration efficiency, low airflow resistance, and mechanical integrity. However, conventional polymeric filters suffer from thermal degradation, while ceramic filters are often limited by brittleness and high pressure drop. Herein, a flexible silica (SiO 2 ) fibrous air filter (SAF) was developed through electrospinning followed by high-temperature calcination, providing a lightweight and permeable ceramic membrane for harsh filtration environments. Calcination at 900°C enabled the best balance between amorphous SiO 2 network formation and mechanical flexibility, while higher calcination temperatures induced inter-fiber sintering and brittleness. The optimized SAF filter exhibited a PM 0.3 filtration efficiency of 99.22% for PSL aerosols at a low pressure drop of ~65 Pa under an airflow rate of 5.3 cm s −1 . It also achieved an efficiency of > 97% for DEHS oily aerosols with a pressure drop of ~70 Pa. Continuous filtration tests demonstrated stable filtration efficiency over 1 h, and pressure drop maintained between 60 and 70 Pa. Moreover, the filtration performance retained unchanged after secondary heat treatment at 1000°C, and the SAF filter preserved their structural integrity under direct flame exposure at over 900°C. These results demonstrate that the flexible amorphous SiO 2 fibrous filter effectively bridges high-temperature resistance, high filtration efficiency, and low pressure drop, offering a promising membrane platform for particulate removal from high-temperature gases.
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高影响因子
FUEL
·
2024
·
IF 6.7
Shigang Li,Xiaohui Liu,Yong Guo,Yanqin Wang
Ammonia is considered as a potential hydrogen carrier as its high hydrogen content. Hydrogen release still presents challenges due to the lack of efficient catalyst. In this work, we report a Ni@SiO 2 catalyst prepared through a sol–gel method, which displays satisfied catalytic activity and remarkable long-term stability. The origination of activity and stability has been investigated carefully by various characterizations. The strong interaction between nickel species and silica species is responsible for the excellent performance via generating small nickel particle and hindering the sintering of nickel during the high temperature reaction condition. This study offers novel insights into the design and preparation of highly efficient catalysts for ammonia decomposition to produce hydrogen.
研究领域:
化学工程
·
材料科学
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DOI
高影响因子
Toxics
·
2024
·Vol. 12
·期 2
·99
·
IF 3.9
Jintao Yu,Yuning Xuan
Volatile organic compounds (VOCs) are prevalent soil contaminants. During the ex situ soil remediation process, VOCs may overflow from the soil and cause gas to diffuse into the atmosphere. Moreover, some VOCs, such as trichloromethane, are categorized by the EPA as emerging contaminants, imparting toxicity to organs, and the endocrine and immune systems, and posing a huge threat to human health and the environment. To reduce VOCs’ emissions from contaminated soil, aqueous foam suppression is a prospective method that provides a durable mass transfer barrier for VOCs, and it has been widely used in odor control. Based on an aqueous foam substrate, in order to enhance the foam’s stability and efficiency of suppression, SiO2–TiO2-modified nanoparticles have been used as stabilizing agents to improve the mechanical strength of liquid film. The nanoparticles are endowed with the ability to photocatalyze after the introduction of titanium dioxide. From SEM imaging, IR, and a series of morphological characterization experiments, the dispersibility of the SiO2–TiO2-modified nanoparticles was significantly improved under the polar solvent, which, in turn, increased the foam duration. The foam dynamic analysis experiments showed that the foam liquid half-life was increased by 4.08 h, and the volume half-life was increased by 4.44 h after adding the novel synthesized nanoparticles to the bulk foam substrate. From the foam VOC suppression test, foam with modified nanoparticles was more efficient in terms of VOCs’ suppression, in contrast with its nanoparticle-free counterparts, due to the longer retention time. Moreover, in a bench-scale experiment, the SiO2–TiO2nanoparticles foam worked against dichloroethane, n–hexane, and toluene for almost 12 h, with a 90% suppression rate, under UV irradiation, which was 2~6 h longer than that of UV-free SiO2–TiO2nanoparticles, the KH–570-modified nanosilica foam, and the nanoparticle-free bulk foam. XPS and XRD results indicate that in SiO2–TiO2nanoparticles, the proportion of titanium valence was changed, providing more oxygen vacancies compared to raw titanium dioxides.Keywords:volatile organic compounds;emerging pollutants;aqueous foam suppression;nanoparticle silica;TiO2photocatalysis
研究领域:
环境科学
·
纳米技术
·
土壤修复
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Zhenying Liu,Shouwu Huang,Tingting Pan,Shaofeng Dong,Zihang Wang,Moquan Yan,Yin Liu
Ceramic aerogels exhibit significant advantages for thermal insulation applications. However, their practical utilization is hindered by high manufacturing costs, inherent brittleness, and inadequate thermal resistance. In this study, inspired by the dual-network architecture of the human skin dermis, we developed a biomimetic aerogel-like ceramic thermal insulator (ACSM) via a scalable electrospinning and sol–gel strategy. The structural design integrates rigid alumina nanofibers with flexible carbon fibers, which are consolidated into a stable three-dimensional porous framework via nanoscale silica welding. This distinctive fibrous network imparts the material with a low bulk density (0.1107–0.1217 g/cm3), commendable compressive strength (0.31–1.76 MPa), and ultralow thermal conductivity (0.0512–0.0624 W/(m·K)). Furthermore, the three-dimensional mesh structure of the ACSM remains intact after heat treatment at 800 °C in a nitrogen atmosphere, confirming its exceptional thermal stability. Importantly, the material’s comprehensive performance can be precisely tuned by modulating the relative content of the two fiber components. This study establishes a robust foundation for the future development of advanced nanostructured biomimetic thermal insulation materials, with potential applications in aerospace, energy-efficient buildings, and thermal management.
研究领域:
材料科学
·
陶瓷
·
热工工程
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纳米材料
·
仿生学
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产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Shiwei Miao,Zheng Xiong,Jixi Zhang,Yongzhong Wu,Xiao Gong
In recent years, photothermal materials that can convert light into heat energy have attracted extensive attention. In this work, we report a simple and effective approach to construct a self-cleaning photothermal superamphiphobic fabric. Dopamine (DA) can self-polymerize into polydopamine (PDA) and adhere to the surface of cotton fabric as a secondary reaction platform. Then, SiO2 nanoparticles were in situ grown on the PDA@fabric surface by the sol–gel method. The PDA clusters can not only provide good photothermal conversion performance but also be integrated with SiO2 to create micro–nano rough structures. Finally, the surface of SiO2 was modified by the long chain of fluorosilane to decrease the fabric surface energy, resulting in superamphiphobicity. The contact angles of water, ethylene glycol, and pump oil on the modified fabric surface could reach 161.1, 158.1, and 142.2°, respectively, making the fabric resistant to contamination by water, common beverages, and oil. Due to the adhesion of the PDA layer, the strong binding force between the fabric and SiO2 particles enabled the modified fabric to withstand various chemical and mechanical attacks, showing excellent mechanical robustness and harsh environmental stability. More importantly, the surface temperature of the modified fabric could be increased from 19.6 to 37.0 °C, which is close to the human body temperature, under the irradiation of simulated sunlight (I = 15 A, 300 s). The photothermal superamphiphobic fabrics with self-cleaning properties show great promise in the photothermal conversion field.
研究领域:
材料科学
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纺织工程
·
纳米技术
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DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2025
·
IF 3.5
Wang Zhan,Zhiyuan Xu,Xin Feng,Lixia Li,Qinghong Kong,Le Chen,Ru Zhou,Mingyi Chen,Juncheng Jiang
Based on the ice template method, ternary composite aerogels were prepared from fumed SiO 2 , gelatin, and polyimide. The purpose of the study is to improve the thermal-mechanical properties of the composite aerogel by adding fumed SiO 2 , and to construct a cross-linking network by gelatin and polyimide to further provide attachment sites for fumed SiO 2 . By this method, the thermo-mechanical properties of the composite aerogels were enhanced. The results show that when 2.4 g fumed SiO 2 is added and freezing rate at -7 °C/min, the composite aerogel demonstrates excellent thermal-mechanical properties.
研究领域:
材料科学
·
纳米技术
·
高分子科学
·
热力学
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产品关联
DOI
高影响因子
Food Analytical Methods
·
2026
·Vol. 19
·期 2
·82
·
IF 3
Tian Yun,Gao Chunxuan,Zhang Dong,Li Chen,Shi Xingbo,Gao Wenli
Early detection and control of aflatoxin B1 (AFB1) contamination are essential for ensuring food safety. However, conventional analytical methods frequently encounter technical limitations including operational complexity and insufficient sensitivity. To overcome these limitations, an ultrasensitive fluorescent immunoassay detection of AFB1 was developed based on SiO 2 nanospheres. These highly dispersible nanospheres were utilized as carriers to co-load CdSe/ZnS quantum dots (QDs) and AFB1-specific aptamers (Apt), resulting in the construction of SiO₂@QDs@Apt fluorescent probes with enhanced signal amplification (7.51 \(\times\) 10 3 -fold improvement in sensitivity compared to the QDs@Apt method without SiO₂ nanospheres). The assay achieved an ultra-low detection limit of 5.06 \(\times\) 10 –7 ng/mL and a broad linear range of 10 −7 ~10 ng/mL. Validation through standard spiking experiments and real sample analysis confirmed the method’s accuracy and reliability. This strategy demonstrated higher sensitivity than the commercial ELISA kit tested, suggesting its potential utility for trace AFB1 monitoring in certain food matrices. Overall, this simple, specific, and cost-effective strategy could serve as a sensitive analytical platform for AFB1 monitoring in food safety laboratories.
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DOI
高影响因子
危险品化学品经营许可证（带存储）