Advanced Optical Materials
·
2025
·
IF 7.2
Minkun Jin,Wang Chen,Changheng Chen,Yanqi Wu,Lukasz Marciniak,Chongfeng Guo
Chloride double perovskites have sparked significant interest and opened new avenues for luminescent materials hosts due to their lower phonon energy, flexible compositions, and excellent luminescent property. However, the instability to water has limited its fundamental applications, especially in the biological fields, although its stability has been improved in comparison with lead−based perovskites. Here, nanophosphor Cs 2 NaBiCl 6 : Nd 3+ , Yb 3+ (CNBC: Nd 3+ , Yb 3+ ) is prepared by a hot-inject method, and then its stability to water is enhanced by coating a layer of SiO 2 shell. For improving its photothermal conversion ability, organic photothermal agents IR780 is adsorbed on the surface of CNBC: Nd 3+ , Yb 3+ @SiO 2 to form monodispersed temperature self−monitoring photothermal agents CNBC: Nd 3+ , Yb 3+ @SiO 2 @IR780, where the temperature sensing property is based on the temperature−dependent lifetimes of Yb 3+ and the photothermal conversion property comes from the synergistic effect of IR780 and the nonradiative transition of Nd 3+ during luminescence. The maximum relative sensitivity and photothermal conversion efficiency of CNBC: Nd 3+ , Yb 3+ @SiO 2 @IR780 reach 1.44% K −1 at 280 K and 36.8%. Finally, the temperature detection and photothermal antimicrobial ability of CNBC: Nd 3+ , Yb 3+ @SiO 2 @IR780 are evaluated through chicken tissue temperature measurement and photothermal ablation effect against Escherichia coli and Staphylococcus aureus (93.3% and 95.1%).
研究领域:
材料科学
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纳米技术
·
光学材料
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生物医学工程
·
光热治疗
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Limeng Song,Feiyue Hu,Yongqiang Chen,Li Guan,Peigen Zhang,Linan Wang,ZhengMing Sun,Yanqiu Zhu,Hailong Wang,Renchao Che,Bingbing Fan,Rui Zhang
To meet the demands of maritime defense and transportation, next-generation microwave absorption (MA) materials must combine efficient attenuation and corrosion resistance (CR). SiC nanofibers, with their moderate dielectric constant and chemical inertness, are ideal multifunctional coating fillers. However, their single-component nature limits microwave attenuation, resulting in low efficiency and narrow bandwidth. Incorporating corrosion-resistant components and employing heterointerface engineering offers a promising strategy to enhance polarization loss and synergistically improve CR. In this study, SiC nanofibers synthesized via chemical vapor deposition are used as precursors; SiO 2 interlayers and nitrogen-doped carbon shells are sequentially introduced to form multilayered core–shell nanofibers. Abundant heterointerfaces and defects effectively regulate impedance matching and introduce multiple loss mechanisms, including conduction, interfacial, and defect-induced dipole polarization. The prepared SiC@SiO 2 @C (SSC) nanofibers achieve a minimum reflection loss of −52.40 dB, a maximum effective absorption bandwidth of 7.68 GHz, and a maximum radar cross-section reduction of 38.42 dB m 2 , demonstrating excellent MA properties. Moreover, SSC/polyvinylidene fluoride (PVDF) composite coatings exhibit superior CR performance, with significantly enhanced corrosion potential and reduced current density compared to pure metal and PVDF coatings. This study underscores the synergistic effect of heterointerface engineering in enhancing both MA and CR for harsh environments.
研究领域:
材料科学
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纳米技术
·
电磁学
·
表面工程
·
腐蚀科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Xiaodong Wen,Qizhi Min,Xiaodong Liu,Gang Zhao,Junyao Wang,Qinshang Xu,Guoshuai Shi,Liming Zhang,Wenhua Zhang,Yude Su
Structural reconstruction─an uncontrollable process that compromises the stability of Cu-based catalysts in electrochemical CO2 reduction (CO2R)─presents a major scientific challenge that has yet to be overcome. In this work, we develop a well-controlled SiO2 encapsulation approach to stabilize Cu-based CO2R electrocatalysts against reconstruction. Using Cu nanowires (CuNWs) as a model platform, we demonstrate that SiO2 encapsulation can significantly suppress Cu reconstruction while retaining ∼95% of the initial CO2R performance over 24-h stability tests at −1.15 V vs reversible hydrogen electrode (VRHE). In contrast, unencapsulated CuNWs exhibit severe structural deterioration with attenuated CO2R activity under identical testing conditions. In situ Raman studies and density functional theory (DFT) calculations reveal that the antireconstruction effect results from the formation of a robust Cu–O–Si interface that can not only serve as a structural anchor but also contribute to strengthening the Cu–Cu bonding at the exposed Cu active sites during CO2R operation. These results decipher the stabilizing mechanism of SiO2 encapsulation, and provide key insights for designing durable Cu-based CO2R electrocatalysts toward practical applications.
研究领域:
电催化
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纳米材料
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环境化学
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材料科学
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 9
·2104972
·
IF 17.521
Shenghua Wang,Kai Feng,Dake Zhang,Deren Yang,Mengqi Xiao,Chengcheng Zhang,Le He,Binhang Yan,Geoffrey A. Ozin,Wei Sun
Cu-based catalysts exhibit excellent performance in hydrogenation reactions. However, the poor stability of Cu catalysts under high temperatures has restricted their practical applications. The preparation of stable Cu catalysts supported by SiO 2 with strong metal–support interaction (SMSI) has thus aroused great interest due to the high abundance, low toxicity, feasible processability, and low cost of SiO 2 . The challenge in the construction of such SMSI remains to be the inertness of SiO 2 . Herein, a simple and scalable method is developed to prepare 2D silica (2DSiO 2 ) supported Cu catalysts with SMSI by carefully manipulating the topological exfoliation of CaSi 2 with CuCl 2 and thereafter calcination. The prepared Cu-2DSiO 2 catalysts with the unique encapsulated Cu nanoparticles exhibit excellent activity and long-term stability in high-temperature CO 2 hydrogenation reactions. This feasible and low-cost solution for stabilizing Cu catalysts might shed light on their realistic applications.
研究领域:
催化
·
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Yulan Jian,Tianlu Xu,Dennis W. Hess,Wei Tang,Xijuan Chai,Lianpeng Zhang,Kaimeng Xu,Zhichang Guo,Hui Wan,Linkun Xie
Fast-growing bamboo offers a sustainable alternative to meet the increasing demand for wood. However, its inherent hydrophilicity limits its performance, necessitating hydrophobic modifications to enhance longevity. In this study, 1 H,1 H,2 H,2 H- perfluorodecyltrimethoxysilane was used to anchor SiO 2 nanoparticles onto bamboo surface, creating superhydrophobic coatings . The nanoparticles constructed a micro-/nano-rough structure on the bamboo surface, and fluorosilanes significantly reduced the surface energy of bamboo. The wettability , micro-morphology, chemical composition, and resistance to acid and alkali corrosion, mechanical abrasion, and UV aging of the superhydrophobic coatings were extensively investigated. The results demonstrated that the modified bamboo achieved a surface energy of 0.2±0.0 J/m 2 and a water contact angle of 156.8±0.2°. Furthermore, the coating exhibited excellent chemical and physical stability. This straightforward and effective surface treatment method offers substantial potential for broadening bamboo's applications in outdoor environments .
研究领域:
材料科学
·
林业工程
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Xiuzhen Xu,Weiqin Feng,Xudong Liu,Zhicheng Jiang,Bi Shi
Graphical A Ru-based catalyst Ru/DGC was synthesized from distiller′s grains for the hydrogenation of phenol into cyclohexanol. The adsorption processes of Ru 3+ and phenol on the catalyst were enhanced by the chemisorption, thereby improving the Ru distribution and the catalytic activity. The high activity, exceptional stability, and the mild hydrogenation conditions make Ru/DGC adequate for industrial applications. Selective hydrogenation of lignin-derived phenolic compounds is an essential process for developing the sustainable chemical industry and reducing dependence on nonrenewable resources. Herein, a composite C−SiO 2 material (DGC) was prepared via the stepwise pyrolysis and steam activation of the distiller′s grains, a fermentation solid waste from the Chinese liquor industry. After Ru loading, Ru/DGC was used for the catalytic hydrogenation of phenol to cyclohexanol. Steam activation remarkably increased the hydrophilicity and specific surface area of DGC, introducing oxygen-containing functional groups on the surface of DGC, thereby promoting the adsorption of Ru 3+ and phenol. Additionally, the large specific surface area facilitated the dispersion of the active metal. Furthermore, the steam activation of DGC promoted the graphitization of the carbon matrix and formed Si−H/Si−OH bonds on the SiO 2 surface. The benzene ring of phenol interacted with the carbon matrix via π–π stacking, and the hydroxyl group of phenol interacted with SiO 2 via hydrogen bonding. The synergistic interactions of phenol at the C−SiO 2 interface enhanced phenol adsorption to promote the hydrogenation. Consequently, 100 % of phenol was hydrogenated to cyclohexanol at 60 °C within 30 min. Furthermore, the optimized catalyst exhibited high activity for phenol hydrogenation even after four reuse cycles. The outstanding stability of the catalyst and its requirement for mild reaction conditions favor its large-scale industrial applications.
研究领域:
化学工程
·
可持续发展
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催化科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 43
·31868-31876
·
IF 3.9
Shuai Liu,Yuzhu Xiong,Fuping Dong
The development of non-toxic drug carrier materials with high loading capacity, sustained release properties, stability, and biocompatibility holds significant medical value and potential for loading and releasing poorly soluble drugs. In this study, we synthesized a biocompatible, non-toxic, environmentally friendly CD-MOF porous material with high specific surface area and tunable structure. By incorporating SiO2 to enhance the stability of MOF materials, the synthesized CD-MOF@SiO2 material shows promising applications in drug delivery. The obtained CD-MOF@SiO2 nanocomposite was utilized as a carrier for the poorly soluble drug, folic acid. Characterization of the drug-loaded composite before and after drug loading was performed using scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, N2 adsorption–desorption, and X-ray diffraction analyses, showing improved stability as indicated by thermogravimetric analysis and derivative thermogravimetry data. UV spectrophotometry was used to investigate the loading and sustained release of folic acid under different conditions in PBS buffer, demonstrating that the well-structured CD-MOF@SiO2 material exhibits high drug loading and controllable release properties. The CD-MOF@SiO2 achieved a high drug loading efficiency (166.78%) and encapsulation rate (83.39%) for folic acid, leading to a significant increase in apparent solubility from 1.6 μg mL−1 in its free form to 21.74 mg mL−1, a 13 588-fold expansion. This work presents a novel, efficient, and highly valuable approach for the development of carrier materials for loading and releasing poorly soluble drugs.
研究领域:
药剂学
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材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Gels
·
2024
·Vol. 10
·期 12
·844
·
IF 5
Lei Xu,Guanhua Sun,Jiahui Chen,Xiaoxu Wu,Min Hu,Fang Zhou,Zhi Li
This research enhances the thermal safety of hydrophobic silica aerogel (HSA) by integrating layered double oxides (LDOs). XRD and FTIR confirm that the introduction of LDOs does not affect the formation of SA. The LDO/SA composites demonstrate a low density (0.14–0.16 g/cm 3 ), low thermal conductivity (23.28–28.72 mW/(m·K)), high porosity (93.4–96.1%), and a high surface area (899.2–1006.4 m 2 /g). The TG-DSC results reveal that LDO/SA shows enhanced thermal stability, with increases of 49 °C in the decomposition onset temperature and 47.4 °C in the peak decomposition temperature. The gross calorific value of LDO/SA-15% (with 15 wt% LDO) exhibits a 23.9% reduction in comparison to that of pure SA. The decrease in gross calorific value, along with improved thermal stability, indicates a boost in the thermal safety characteristics of the LDO/SA composites. This study demonstrates that incorporating LDOs enhances the thermal safety of HSA, while preserving its superior performance, thus broadening its potential applications in thermal insulation.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Mengyao Yun,Tao Chen,Ning Zhao,Zhenhua Li
Energy is of great importance for the development of modern society, which is mostly dependent on crude oil. Due to the severe pollution caused by using crude oil and the diminishing of crude oil reserves, it is urgent to look for clean oil from alternative resource other than crude oil. Currently, Coal-to-Liquid (CTL) or Biomass-to-Liquid (BTL) technology is an important way to produce clean liquid fuels through Fischer-Tropsch Synthesis (FTS) of syngas. For FTS process, catalyst is a main factor for affecting on syngas conversion and product distribution. For traditional oxides-supported catalysts, the mutual constraint between active metal loading and dispersion at high metal loading is hard to overcome, which will hinder the synthesis of high-performance FTS catalysts. In this paper, a new type of Co@SiO 2 -T (CS-T) and Co@SiO 2 -X (CS-X) catalysts with core-shell structure were prepared by using polyvinyl pyrrolidone (PVP) as the structural stabilizer, hexadecyl trimethyl ammonium Bromide (CTAB) as the templating agent and tetraethyl orthosilicate (TEOS) as the silica source. The effects of hydrothermal temperature and pyrolysis temperature on the catalyst physical-chemical properties and FTS performance were investigated. The results showed that increasing the hydrothermal temperature favored the formation of the core-shell structure of the catalysts. With the increase of pyrolysis temperature, the catalyst particle size decreased from 0.54 μm to 0.23 μm. The FTS activities of the catalysts showed a volcano trend with hydrothermal and pyrolysis temperatures.
研究领域:
能源化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2025
·
IF 3.3
Hao Miao Ouyang,Hai Yan Xu,Guang Tao Fei,Shao Hui Xu,Xin Feng Li,Wen Chao Chen,Shi Jia Li
The separators play a crucial role in lithium-ion batteries as a safety and functional component. In this study, we have prepared SiO 2 nanoparticles by sol-gel method and spun them to polypropylene separators. The effects of different particle sizes on the surface morphology, electrolyte wettability and thermal stability have been researched. The results show that SiO 2 nanoparticles with an approximately size of 50 nm are the most effective in enhancing the performance of the separator. Compared to the battery assembled with the unmodified separator, the battery assembled with the composite separator modified by SiO 2 nanoparticles exhibits superior cycling and rate performance. Furthermore, these modified batteries exhibited reduced polarization voltage and impedance under the same current conditions, indicating SiO 2 nanoparticles enhanced interface compatibility between the separator and the electrolyte. This suggests that incorporating SiO 2 nanoparticles into the separator design markedly improves battery performance.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Xiang Long,Hao Yu,Peijian Zhang,Chen Qian,Mengze Lu,Yaqin Fu
Mechanically adaptive hydrogels with switchable mechanical properties have garnered significant attention due to their potential applications in various emerging fields. However, inevitable swelling and/or shrinkage associated with mechanical property switching lead to dimensional instability and structural failure of these hydrogels. This study synthesized dimensionally stable thermal-stiffening composite hydrogels by incorporating poly( N -isopropyl acrylamide) (PNIPAM)-grafted SiO 2 hybrid nanoparticles into a hydrogel matrix. By strategically localizing the thermo-responsive unit of PNIPAM at the interface between the SiO 2 nanoparticles and hydrogel matrix, the undesired swelling and shrinkage behavior are successfully eliminated, which are typically observed in conventional thermo-responsive mechanically adaptive hydrogels. The resulting composite hydrogels exhibit significantly enhanced dimensional stability compared to conventional counterparts and demonstrate superior response speed. Upon heating to 40 °C, the PNI-SiO 2 /P(AM- co -NIPAM)-2.0 hydrogel displays a tensile modulus of 22.4 kPa, strength of 60.5 kPa, and toughness of 127.1 kJ·m −3 , which is approximately twice that of its original state (12.2 kPa, 32.5 kPa, and 70.7 kJ·m −3 ). Moreover, both heating and cooling responses are completed within approximately 10 seconds while maintaining mass and volume changes below 3 %, with water content remaining at approximately 95 %. This work presents a design strategy for developing dimensionally stable mechanically adaptive composite hydrogels, which hold great promise for applications in tissue engineering, biomedical fields, and soft robotics.
研究领域:
材料科学
·
生物医学工程
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
Acta Biomaterialia
·
2025
·
IF 9.6
Jimin Huang,Yi Zheng,Wenping Ma,Yahui Han,Jianmin Xue,Zhiguang Huan,Chengtie Wu,Yufang Zhu
Non-compressible hemostasis and promoting tissue healing are important in soft tissue trauma repair. Inorganic aerogels show superior performance in rapid hemostasis or promoting tissue healing, but simultaneously promoting non-compressive hemostasis and soft tissue healing still remains a challenge. Herein, SiO 2 -based inorganic nanofiber aerogels (M 2+ @SiO 2 , M=Ca, Mg, and Sr) were prepared by freeze-drying the mixture of bioactive silicates-deposited SiO 2 nanofibers and SiO 2 sol. These M 2+ @SiO 2 aerogels have a three-dimensional highly-interconnected porous structure, remarkable flexibility, high absorption, good hydrophilicity, negative zeta potential, and bioactive ions releasing capacity. M 2+ @SiO 2 aerogels not only exhibited satisfactory hemostasis activities in vitro, but also possessed high hemostatic efficacy in compressible rabbit femoral artery injury bleeding model and non-compressible rat liver puncture bleeding model compared to medical gauze and gelatin sponge. M 2+ @SiO 2 aerogel had low blood clotting index of ca. 10% and short partial thromboplastin time of ca. 82 s in vitro , and could greatly short bleeding time by more than 50% and decrease blood loss by about 80% compared to medical gauze and gelatin sponge in non-compressible hemostasis. Sr 2+ @SiO 2 aerogel showed optimal bioactivities on promoting cell proliferation, cell migration, and the expression of liver function and angiogenesis related genes and proteins in vitro . Importantly, Sr 2+ @SiO 2 aerogel possessed a noteworthy function to promote liver soft tissue healing in vivo by releasing bioactive ions and providing a highly-interconnected porous structure to support vascular development and tissue regeneration. Overall, Sr 2+ @SiO 2 aerogel has great potential for integrated rapid hemostasis and soft tissue healing, which is promising in soft tissue trauma therapy. Statement of Significance Non-compressible hemorrhage and soft tissue impairment are the main causes of mortality in emergency trauma. Inorganic aerogels with high porosity and outstanding flexibility can rapidly absorb blood to pro-coagulation and fill in irregular trauma without compression, but the low bioactivity limited the ability to promote soft tissue healing. Herein, SiO 2 -based inorganic nanofiber aerogels (M 2+ @SiO 2 , M=Ca, Mg, and Sr) were prepared by freeze-drying the mixture of bioactive silicates-deposited SiO 2 nanofibers and SiO 2 sol. M 2+ @SiO 2 aerogels possessed high bioactivity and exhibited superior hemostatic performance in compressible and non-compressible bleeding model. Furthermore, Sr 2+ @SiO 2 aerogel showed optimal bioactivities on cell responses and effectively promoted liver healing by releasing bioactive ions and providing highly-interconnected porous support structure for vascular development and tissue regeneration.
研究领域:
材料科学
·
医学
·
生物工程
✓ 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）