Catalysis Science & Technology
·
2019
·Vol. 9
·期 20
·5712-5724
·
IF 5.726
Shuyuan Wang,Dan Xu,Jiaojiao Zhao,Wentao Zheng,Caixia Hu,Xiaodong Wen,Yong Yang,Yongwang Li
Hydrodeoxygenation (HDO) of lignin derivatives offers an effective approach to produce aromatics. In this work, phosphorus (P) modified Fe/SiO2 catalysts were prepared by a stepwise incipient wetness impregnation method. Influences of P on the physicochemical properties of Fe/P–SiO2 catalysts and their catalytic performance for the HDO of anisole were studied. Characterization results revealed that the addition of P into SiO2 reduced the sites for stepwise impregnated Fe species and FeOx particles could be isolated and prevented from aggregating by the optimized contents of P. The reduction of catalysts and the adsorption of H2 were inhibited with increasing the contents of P. In addition, the acidity increased linearly with the P loading pointing to coordinatively unsaturated Fe cations as the Lewis acidic centers in the catalysts. Evaluation results showed that P could tune the distribution of products from aromatics to methyl containing compounds. The aromatics selectivity was promoted to 76.5% with an optimized Fe/P atomic ratio in the 0.5PFS catalyst. Furthermore, an increasing concentration of Lewis acid sites resulted in the methyl transfer reaction (transalkylation). The CH4 selectivity (∼1.55%) was reduced with high contents of P in the catalysts, indicating a significant reduction of carbon loss. These findings provide useful information for the rational design of Fe-based catalysts, which improve the biomass conversion efficiency to platform chemicals.
研究领域:
催化化学
·
生物质转化
·
材料科学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2026
·
IF 4.9
Yupei Chai,Lidan Cao,Yingxing Zhang,Junhong Wang,Duo Zhang,Cunfang Liu
A smart anti-corrosion and self-healing coating BTA@MSNs/g-C 3 N 4 @PDA was prepared base on mesoporous silica nanoparticles (MSNs) and graphite-phase carbon nitride (g-C 3 N 4 ) composites as nano-containers and loaded the corrosion inhibitor benzotriazole (BTA), as well as wrapped polydopamine (PDA). The structure and properties of the composites were characterized by SEM, TEM, EDS, FT-IR, XPS, XRD and N 2 physical adsorption. The release behaviors of BTA were tested by UV–Vis spectroscopy. Then these prepared materials were mixed to epoxy resin E-51 (EP) and cured to obtaining three protective coatings of MSNs/g-C 3 N 4 -EP, BTA@MSNs/g-C 3 N 4 -EP, and BTA@MSNs/g-C 3 N 4 @PDA-EP. These coatings were used as working electrodes to investigate their anti-corrosion and self-healing properties via electrochemical impedance spectroscopy (EIS), salt spray test, SEM and EDS. Test results indicate that the smart coatings presented better corrosion-resistant and self-healing performance. After being soaked in 3.5 % NaCl solution for 30 days, the |Z| 0.01Hz value of the coating BTA@MSNs/g-C 3 N 4 @PDA-EP could still reached to 10 6 , two orders of magnitude higher than that of the coating MSNs/g-C 3 N 4 -EP. Furthermore, the self-healing mechanism of these coatings was also better explored. In summary, this study will provide feasible paths and guidance for the preparation of intelligent anticorrosive self-healing new materials.
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产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2026
·
IF 2.2
Yongfei Zhu,Jiayi Li,Yonggang Du,Xiangli Long
Superhydrophobic materials display great advantages in the domain of oil/water separation, while most of them are from nondegradable polymer substrates and cause secondary pollution after discard. Thereby, a naturally abundant and biodegradable sawdust (SD) was selected as substrate to prepare superhydrophobic adsorbent using bio-benzoxazine based on pyrogallol and dodecylamine (PG-D) and SiO2 as modifiers through a facile dip-coating method at the present work. The prepared superhydrophobic SD (PPG-D/SiO2/SD) possessed a satisfactory adsorption capacity to various solvents and oils ranging from 4.78 to 11.83 g/g. Moreover, the modified sawdust could effectively separate both immiscible oil-water mixtures and surfactant-stabilized water-in-oil and oil-in-water emulsions with a high separation efficiency of above 99.1%. Especially, PPG-D/SiO2/SD possessed excellent reusability, whose adsorption capacity and separation efficiency for immiscible oil-water mixture and emulsions only exhibited a negligible decline even after 30 cycles, meanwhile, its water contact angle maintained above 150°. In addition, PPG-D/SiO2/SD displayed outstanding resistance to corrosive solution. These excellent characteristics make PPG-D/SiO2/SD have a promising application in the oil-water separation field.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Yizhou Xu,Zhichao Zhang,Ziqing Gong,Shengfei Hu
This article reports the preparation of a multi-layer core-shell flame retardant (APP@SiO 2 @MA) using melamine (MA), ethyl silicate (TEOS), and γ-(2,3-epoxypropoxy) propyltrimethoxysilane (KH-560) as raw materials, coated with ammonium polyphosphate (APP). Apply the flame retardant to PPO/PS composite materials to improve their flame retardant properties and investigate its effect on the foaming performance of PPO/PS composite materials. This article confirms the successful microencapsulation of APP by SiO 2 and MA through energy dispersive spectroscopy (EDS) analysis, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) observation. The combustion performance of P samples and their foam samples was evaluated through thermogravimetric analysis (TG), limit oxygen index (LOI), and UL-94 vertical combustion test, the residual carbon quality significantly increased from 17% of PPO/PS to 38%, and the maximum oxygen index increased from 22.9% to 30.5%. At 165°C and 3.5 MPa foaming conditions, the foaming ratio increased from 1.18 to 4.56 times, and the maximum oxygen index after foaming was 27.9%. This study provides a green and convenient method for the preparation of flame-retardant PPO/PS bead foam materials, expanding the practical application of PPO/PS in industry.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Wanchun Lin,Yingchun Liu,Jiayuan Yang,Bo-Mei Liu,Wei Liu,Maoping Lyu,Jesse Zhu,Hui Zhang
Recent public health issues and the rise of antimicrobial resistance have driven the demand for durable, self-activating antimicrobial surfaces. Traditional metal oxide coatings often suffer from uncontrolled ion release and limited antibacterial mechanisms, which hinder their long-term effectiveness. In this work, a mechanically robust, friction-activated hydrophobic antibacterial coating is developed by integrating γ-Bi 2 O 3 , polydimethylsiloxane (PDMS), and nanoscale hydrophobic SiO 2 . PDMS imparts low surface energy, while SiO 2 reinforces mechanical stability; substrate adhesion is further enhanced via plasma treatment followed by KH570 silane grafting. Microscale tetrahedral γ-Bi 2 O 3 (∼6 μm) with nanoscale tips (∼200 nm) enables a synergistic antibacterial effect through controlled Bi + release and mechanical membrane disruption, while maintaining low cytotoxicity. Upon friction activation, the P 1 B 2 S 0.04 coating exhibited an increase in water contact angle from 113.1 ± 1.7 ° to 145.9 ± 3.7 ° after 1000 abrasion cycles. The antibacterial rates against E. coli reached 99.94 %, 99.67 %, and 99.87 %, and S. aureus values were 97.77 %, 99.08 %, and 99.29 % after 300, 600, and 900 cycles, respectively. Cytotoxicity tests confirmed good biocompatibility, with cell viability exceeding 80 %. These results indicate that the coating maintains sustained antibacterial performance after repeated abrasion, showing strong potential for applications on medical and public surfaces.
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产品关联
DOI
PubMed
高影响因子
Materials
·
2026
·Vol. 19
·期 2
·
IF 3.2
Mengjie Huang,Baihui Zhang,Xiangyu Jiang,Maojie Jiang,Peng Yin,Xuan Fang,Yanna Lin,Fuqiang Ma
This study addresses the issues of poor stability and difficulty in recovery of free horseradish peroxidase (HRP) by developing a multi-level composite immobilized carrier that combines high loading capacity with long-term stability. The SiO2@MnO2@MAF-7 core–shell structured carrier was prepared via a solvothermal self-assembly method. Three immobilization strategies—adsorption, covalent cross-linking, and encapsulation—were systematically compared for their immobilization efficacy on HRP. The material structure was analyzed using techniques such as specific surface area analysis (BET), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) to characterize the material structure. Enzyme kinetic parameter determination experiments were conducted to systematically evaluate the performance advantages of the immobilized enzyme. BET analysis showed that SiO2@MnO2@MAF-7 had a specific surface area of 251.99 m2/g and a mesoporous area of 12.47 nm, and its HRP loading was 50.37 U/mg (immobilization efficiency 85.03%). Compared with free HRP, the Km value of the immobilized enzyme was decreased by 42%, the activity retention rate was increased by 35–50% at 80 °C and pH 4–9, and the activity was maintained by 65% after five repeated uses. In this study, MAF-7 was combined with MnO2/SiO2for HRP immobilization for the first time, and the triple effect of rigid support-catalytic synergy-confined protection synergistically improved the stability of the enzyme, providing a new strategy for the industrial application of oxidoreductases.
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产品关联
DOI
PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 3.978
Jie Li,Yuxiang Yang,Zhiyong Han,Min Zhao,Hongming Yuan,Chaoying Ni
Entrapment of enzyme in a cage structure of alginate/silica composite gel can maintain the chemical or configurational structures unchanged in the enzyme, providing a promising means of enzyme immobilization. The alginate/silica composite gel can also provide more adsorption sites for the substrate, which is biocompatible and will carry out degradation and adsorption of pollutants within a cage-like structure reactor simultaneously. In this study, we used a magnetic host-guest cage structured MNPs@ALG@SiO 2 composite with a specific enzyme embedded as its guest in the host matrix, to enhance its performance. Additionally, its swelling, leakage rate and immobilization conditions were optimized. The magnetic nanoparticles (MNPs) were used to compensate for the ease of collapse of the internal structure of alginic acid, while SiO 2 was used to enhance the swelling resistance of the carrier and prevent the degradation of polysaccharides in the natural environment, thereby maintaining the enzyme biological activity and immobilization rate. Finally, the effects on the degradation of tetrachloroguaiacol (TeCG) by the immobilized enzyme embedded in the MNPs@ALG@SiO 2 composite were investigated. When the concentration of ALG was 2% and the TEOS concentration was 40 %, the immobilized MNPs@ALG@SiO 2 was found to perform the best. The optimum conditions of immobilizing laccase are pH = 5, enzyme concentration 0.4 g/L, adsorption time 12 h and temperature 20 ℃. The degradation conditions of TeCG are pH = 6, degradation temperature 40 ℃, degradation time 10 h and the degradation products of TeCG were acetic acid and ethanol according to GC–MS.
研究领域:
环境科学
·
生物技术
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DOI
高影响因子
Journal of Coatings Technology and Research
·
2020
·Vol. 18
·期 1
·107-116
·
IF 1.815
Liao Wenbo,Zou Liuyong,Zheng Shaona,Zhao Lili,Huang Xiangxuan,Ye Lingyun,Zhong Guoyu
Polyhedral oligomeric silsesquioxane (POSS)-containing fluorinated poly(styrene–acrylate)/SiO 2 (POSS-FPSA/SiO 2 ) composite materials were prepared by preemulsification and direct blending method. The SiO 2 particles were induced aggregated onto the surface of POSS, and sol–gel processes were simultaneously carried out with addition of co-solvent to form raspberry-like structure. 29 Si NMR and XRD results confirmed that POSS were successfully grafted to polymer and were evenly dispersed uniformly in polymer matrix. The average diameter of composite latexes increased from 63 to 81 nm with increasing addition of SiO 2 content. AFM and WCA images confirmed that sol–gel processes were promoted by increasing addition of SiO 2 content, which improved the roughness and hydrophobicity of composite films. XPS spectra displayed that two kinds of Si–O bonds existed on the surface of composite films. One was related to the Si–O groups of SiO 2 , and the other was attributed to the Si–O–Si groups obtained from the sol–gel processes. The peak area of the former decreased from 56.86% to 38.78%, while the latter increased from 43.14% to 62.22%. TGA curves demonstrated that the composite film exhibited better thermal stability when the SiO 2 content was 10.0%. In addition, serious phase separation would decrease the thermal stability of composite films.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yuping Zhang,Xiaoqian Tai,Jiayu Zhou,Tiange Zhai,Liyu Xu,Chenxiao Diao,Xiubo Xie,Chuanxin Hou,Xueqin Sun,Xintao Zhang,Zhaohai Li,Wei Du
Liquid phase deposition was developed to synthesise thermally conductive reduced graphene oxide@SiO 2 (rGO@SiO 2 ) composites for use in aerobic environments above 600 °C. This method is a mild, controllable reaction, good repeatability, easy operation, and low cost. The composition, morphology, oxidation resistance property, thermal conductivity (TC) property, and deposition dynamics of the rGO@SiO 2 composites were systematically investigated in this study. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and high-resolution X-ray photoelectron spectroscopy (XPS) measurements proved that SiO 2 particles were synthesised on the rGO. Spherical SiO 2 particles were uniformly dispersed on both sides of the rGO, the SiO 2 particle size was relatively uniform (∼500 nm), and there was no excessive aggregation. Isothermal oxidation and TC analyses showed that the rGO@SiO 2 composite possessed better high-temperature and oxidation-resistance properties compared to pristine rGO, while still exhibiting excellent TC in the out-of-plane direction (k ⊥ ) at 650 °C after 24 h. Moreover, the deposition dynamics of the rGO@SiO 2 composite were established based on the analysis results. The synthesis method, liquid phase deposition, provides a promising route for the mild and controllable synthesis of rGO-ceramic composites for thermal management materials.
研究领域:
材料科学
·
纳米技术
·
化学工程
·
热管理
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Huafei Cai,Yonggang Jiang,Qu Chen,Sizhao Zhang,Liangjun Li,Junzong Feng,Jian Feng
The direct in situ TEM imaging method is adopted to investigate the sintering behavior of SiO 2 aerogels during the rapid heating process. The structural evolution of SiO 2 aerogels and composites at different times during the heat treatment process are further investigated via SEM, FT-IR, BET and XRD . The results indicate that the shrinkage of the SiO 2 aerogels and composites primarily occurs during the initial stage of the heating process (within 20 min) with the shrinkage primarily linked to the fusion of small aerogel particles at high temperatures. The aerogel structure then stabilizes with no further shrinkage observed as the heating process continues. The heat treatment process only promotes the space rearrangement and fusion of small aerogel particles with no observed changes to the amorphous structure of the aerogels, and the small-sized particles fusion was the main causes for the structural evolution of SiO 2 aerogels and composites under rapid heating condition.
研究领域:
材料科学
·
陶瓷
·
纳米材料
·
热加工
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Xueqin Wang,Lvye Dou,Zhaoling Li,Liu Yang,Jianyong Yu,Bin Ding
Functional nanoparticles modified silica nanofibrous materials with good flexibility, a hierarchical mesoporous structure, and excellent durability would have broad applications in efficient removal of contaminants, yet have proven to be enormously challenging to construct. Herein, we reported a strategy for rational design and fabricating flexible, hierarchical mesoporous, and robust ZrO2 nanoparticle-embedded silica nanofibrous membranes (ZrO2/SiO2 NM) for phosphate removal by combining the chitosan dip-coating method with the electrospinning technique. Our approach allows ZrO2 nanoparticles to be in situ firmly and uniformly anchored onto SiO2 nanofibers to drastically enlarge the specific surface area and porosity of membranes. Therefore, the resultant ZrO2/SiO2 NM exhibited a prominent removal efficiency of 85% and excellent adsorption amount of 43.8 mg P g–1 membranes in 30 min toward phosphates. Furthermore, the removal performance toward different types of phosphates revealed that the resultant membranes also could be used to remove phosphates in detergent and fertilizer water samples. More importantly, the membranes with good flexibility could directly be taken out from solution after use without any post-treatment. Such a simple and intriguing approach for fabricating nanofibrous membranes may provide a new platform for constructing membranes with superb phosphate removal performance.
研究领域:
环境科学
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纳米材料学
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水处理技术
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功能材料
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污染控制
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DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 39
·18338-18346
·
IF 6.97
Qi Li,Zhiguang Guo
Solid surfaces with unique superhydrophobic and superoleophobic wettability in air have thus far shown incomparable applications in various fields. However, existing superoleophobic surfaces are always limited by their sophisticated fabrication strategies. Moreover, surface durability also restricts their further application since the well-designed structures and low-surface-energy chemical components are very susceptible to chemical and physical damage. In this study, we report the exploitation of a durable superhydrophobic and superoleophobic spray and dip coating, which is successfully fabricated by employing 3-aminopropyltriethoxysilane and fluoroalkyl silane to modify two sizes of SiO2 particles. The wettability of the developed surface can be tuned by adjusting the mass ratio of the particles due to the change in hierarchical structure. On account of its super-repellence and independence from the substrate, the coating can be coated onto various hard and soft substrates. The as-prepared surfaces exhibit superphobicity to both water and organic fluids with low surface tension, and these liquid droplets can easily roll and bounce on the coated surface, leaving no residues. Furthermore, the coating shows positive antifouling and self-cleaning performances when contaminated or immersed in different liquids. Importantly, the coating is also durable, withstanding harsh environments, such as exposing the coated surface in acid and alkali solution or to high temperatures for a long time, without obviously altering its superamphiphobicity due to the high adhesiveness of poly(vinylidene fluoride hexafluoropropylene) and stable re-entrant-like structure. Its merits of a straightforward fabrication approach and multifunctionality may make the coating suitable for widespread practical applications.
研究领域:
材料科学
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表面工程
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纳米技术
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高分子化学
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功能涂层
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DOI
高影响因子
危险品化学品经营许可证（带存储）