Molecular Catalysis
·
2018
·
IF 0
Yanting Guo,Xing Chen,Xuan Zhang,Shujin Pu,Xutong Zhang,Chengli Yang,Dali Li
The immobilization of enzyme is an important biotechnology in industry. Enzyme immobilization by nanomaterials has attracted interest of researchers due to potentially promising application. Many enzymes had been successfully immobilized by different nanomaterials. In this work, β-glucosidase was immobilized by SiO 2 nanoparticles (nano-SiO 2 ) and zeolitic imidazolate framework-8 (ZIF-8), then the enzymatic properties of them were also compared. The nano-SiO 2 @β-glucosidase and the β-glucosidase@ZIF-8 achieved immobilization yield of 58.5% and 23.0%, respectively. Optimal temperature of the free β-glucosidase, nano-SiO 2 @β-glucosidase and the β-glucosidase@ZIF-8 were around 50 °C. Both free β-glucosidase and nano-SiO 2 @β-glucosidase showed maximal catalytic activity at pH 6.0, while the optimal pH of the β-glucosidase@ZIF-8 was 5.4 roughly. The nano-SiO 2 @β-glucosidase exhibited similar pH stability and thermal stability to those of the free β-glucosidase, and the β-glucosidase@ZIF-8 improved pH stability greatly. Moreover, after the treatment of trypsin for 4 h at 37 °C, the residual activities of the β-glucosidase@ZIF-8 was the highest that retained 94%, which provided huge potential for the application of the β-glucosidase@ZIF-8 in industry. Furthermore, the nano-SiO 2 @β-glucosidase and the β-glucosidase@ZIF-8 can be reused for 5 cycles with 87.5% and 88.7% residual activity, respectively.
研究领域:
生物技术
·
酶工程
·
纳米材料科学
✓ 已验证
产品关联
DOI
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 4
·1176-1186
·
IF 7
Yue Xu,Yang Li,Yong Qian,Shanshan Sun,Ning Lin,Yitai Qian
Silicon monoxide (SiO) is regarded as a promising material to replace traditional graphite anode in the next generation lithium-ion batteries. However, the huge volume expansion and poor ionic/electronic conductivity of SiO particles largely restrict its application in the fast charging and discharging process. Herein, a deficient TiO2−x coated porous SiO structure was designed through the Ag-assisted chemical etching process followed by a hydrolysis approach. Within this composite, the internal pores of SiO particles could accommodate the irregular volume change and also shorten the diffusion pathway of lithium ions. Moreover, the outer TiO2−x could provide a protective shell and favor the generation of stable SEI films. In addition, the large specific surface area increases surface active sites and promotes the electrochemical reaction of lithium ions during the high-rate lithiation/de-lithiation process. As a result, the synthesized porous SiO/TiO2−x composites delivered a high capacity of 501.2 mA h g−1 with a capacity retention of 52.41% at a current density of 1.0 A g−1 after 300 cycles. Even at 2.0 A g−1, it maintained a reversible capacity of 423.4 mA h g−1 after 500 cycles. Finally, a full cell composed of porous SiO/TiO2−x composites and commercial LiCoO2 presented a distinctive enhancement in energy density compared with that of a pure SiO anode. A series of characterization analyses and electrochemical measurements were performed to disclose the mechanism for the superb performance of materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2017
·Vol. 15
·期 3
·505-514
·
IF 1.557
Zhao Yuan,Huang Chongxing,Bei Ronghua,Su Hongxia,Wang Shuangfei
Silicon oxide (SiO
x
) films are widely used as barrier layers in different types of commodity packaging and have caught the interest of manufacturers and researchers alike owing to their high barrier functionality, good acid and alkali resistance, ability to withstand high-temperature and microwave treatments, and good transparency. In this study, we first synthesized polylactic acid (PLA) films by extrusion calendaring and then deposited a SiO
x
layer on the PLA films by plasma-enhanced chemical vapor deposition to prepare SiO
x
/PLA composite films. We then evaluated the barrier functionality of the SiO
x
layer and elucidated its underlying mechanism. We also analyzed its effect on the mechanical properties of the composite films by comparing the oxygen and water vapor transmission rates, soil degradation performances, and surface morphologies of the two types of synthesized films (uncoated and coated with SiO
x
). The results showed that, because of the SiO
x
layer, the barrier properties and mechanical properties of the SiO
x
/PLA composite films were better than those of the uncoated films. In particular, the oxygen and water vapor transmission rates of the composite films were approximately 8–10 and 6–8 times lower, respectively, than those of the uncoated PLA films. In addition, the SiO
x
layer lowered the rate of soil degradation of the composite films, owing to which the weight-loss rates of the composite films were also lower than those of the uncoated films. Further, the tensile strengths and elongations at break of the composite films were higher because of the SiO
x
layer. Graphical
研究领域:
材料科学
·
高分子材料
·
包装工程
·
表面改性
·
生物降解材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chengzhen Fu,Hailu Wang,Hongxing Zhan,Yuanbing Li,Shujing Li,Zhe Qiao,Changdong Wei
Traditional SiO 2 -based thermal insulation materials face critical limitations, such as low strength and high synthesis cost. To address these challenges, composite design strategies have been explored to optimize the properties. In this study, Calcium Silicate Hydrate (CSH)/SiO 2 composites were prepared by a hydrothermal method, and the effects of Ca/Si molar ratio, holding time and hydrothermal temperature on phase composition and properties were systematically studied. The relationship between material properties and the content/type of CSH phases was revealed. Results demonstrate that compared with conventional SiO 2 -based materials, the CSH/SiO 2 composites exhibit excellent properties. The samples prepared at a Ca/Si ratio of 0.6 and a holding time of 12 h show the best overall performance, with a low thermal conductivity of 0.117 W/(m·K), high compressive strength of 3 MPa, as well as excellent thermal stability, evidenced by only 2.89 % linear shrinkage and 212 % strength retention after exposure to 800 °C. Additionally, the synthesis process is relatively simple, energy-efficient, and scalable. These findings highlight the potential of CSH/SiO 2 composites for thermal insulation applications in aerospace, energy, and construction industries.
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产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Zhang Wenlong,Wang Bin,Xu Yuxin,Chen Xiao,Zhang Kuibao,Hao Yan
To enhance the thermal stability of SiO 2 aerogels at high temperature, this study proposes a method involving the incorporation of MgAl 2 O 4 nanoparticles into SiO 2 aerogels to improve their high-temperature stability. By comparing the performance of MgAl 2 O 4 -SiO 2 aerogel with pure SiO 2 aerogels after heat treatment at high temperatures, it is demonstrated that the MgAl 2 O 4 nanoparticles significantly enhances the thermal stability of SiO 2 aerogels at elevated temperatures while almost no effect on thermal conductivity, about 0.0312 and 0.0322 W/(m·K). The MgAl 2 O 4 -SiO 2 aerogels exhibit superior thermal stability and insulation performance compared to pure SiO 2 aerogels at temperatures exceeding 800 ℃. Notably, even after heat treatment at 1100℃, a condition that causes pure SiO 2 aerogels to nearly lose their porous structure, the MgAl 2 O 4 -SiO 2 aerogels retain a specific surface area of 81.95 m 2 /g and thermal conductivity of 0.0584 W/(m·K).
研究领域:
材料科学
·
无机化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·
IF 2.4
He Minqi
The purpose of this study was to prepare amorphous silicon monoxide (SiO) at a low-temperature using a thermoelectric field coupling method. The sample was heated directly by an electric current using silicon (Si) and silicon dioxide (SiO 2 ) as raw materials. Experimental conditions included a stoichiometric mass ratio of raw materials, 10–13 pct conductive graphite doping, an external electric field of 600 V/cm, a current density of 10.57 A/cm 2 , and a furnace temperature range of 300–480 °C in a vacuum environment. A reddish-brown gas condensate with a Si:SiO 2 atomic fraction ratio of 49.86:50.14 was successfully prepared. The real-time voltage measurements divided the process into four stages. Results showed this method prepared amorphous SiO powder at a lower temperature, reducing furnace temperature by nearly 1000 °C compared to traditional methods, which is significant for lowering crucible temperatures in industrial silicon monoxide production.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xin Luo,Weilong Ren,Huanhuan Xing,Muhammad Irfan Hussain,Qumail Arshad,Yuzeng Li,Zhiyuan Liu,Changyong Liu,Zhangwei Chen
Vat photopolymerization 3D printing technique enables the precise fabrication of ceramic components with highly complex shapes and improved performance. It has been used for the preparation of Li 4 SiO 4 ceramic units, which are a promising candidate for stable tritium breeding in fusion reactions. In order to further enhance the production properties, herein metal oxide additions are proposed to combine with the previously reported generative shaping and material-forming (GSM) strategy. A remarkable theoretical density of 92.8 % and crushing load of 38.54 N reveal the effectiveness of this approach in producing robust ceramic units potentially suitable for tritium production. The study is proved to be cost-effective, highly efficient in production and most importantly to be able to produce high-performance Li₄SiO₄-based tritium breeding ceramics. Our findings provide a new insight into lithium-based tritium breeders preparation and applications, supporting their potential in fusion energy.
研究领域:
材料科学
·
核能工程
·
先进制造
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Ying Liu,Guozhu Tong,Jing Li,Yuzhu Jin,Maoli Yin,Xuehong Ren
As living standards continue to rise, the demand for advanced cotton textiles that fulfill enhanced functional requirements has grown significantly. Therefore, the development of multifunctional antibacterial/hydrophobic cotton fabrics holds considerable practical value. In this study, a zeolitic imidazolate framework (ZIF-8) based hybrid material, ZIF/SiO 2 -LDS (Long-chain derivative of silane), was synthesized via a co-precipitation method using silica, zinc nitrate hexahydrate, 3-aminopropyltriethoxysilane (KH-550), 2-methylimidazole and hexadecyltrimethylsilane (HDTMS). The resulting hybrid particles were then applied to cotton fabric through a simple padding process, achieving a loading amount of 2.348 %. This was followed by chlorination treatment with sodium hypochlorite to introduce antibacterial functionality. Hydrophobicity was assessed through contact angle measurements, achieving a maximum contact angle exceeding 145°. Antibacterial efficacy testing revealed complete inactivation of bacteria strains, achieving 100 % effectiveness. Study on the adhesion behavior of Staphylococcus aureus and Escherichia coli showed that HZSi/cot-Cl exhibits outstanding antibacterial adhesion resistance, effectively inhibiting bacterial attachment at concentrations up to 10 6 CFU/mL within one hour. The combined antibacterial and anti-adhesive properties significantly mitigate biofilm formation on the HZSi/cot-Cl surface. Notably, the fabric retained its anti-biofilm functionality even after 50 wash cycles. This research provides valuable insights into the development of advanced antibacterial and anti-adhesive treatments for cotton fabrics.
研究领域:
材料科学
·
纳米技术
·
纺织工程
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Materials
·
2022
·Vol. 66
·期 3
·903-912
·
IF 8.64
Zhong Wei,Zhang Ce,Li Siwu,Zhang Wei,Zeng Ziqi,Cheng Shijie,Xie Jia
Irreversible lithium loss in the initial cycles appreciably reduces the energy density of lithium-ion batteries. Prelithiation is an effective way to compensate for such lithium loss, but current methods suffer from either the instability or low capacity of prelithiation reagents. Lithium oxalate (Li 2 C 2 O 4 ) has shown great potential as a lithium-compensation material because of its high theoretical capacity (equivalent to lithium metal), low cost, and air stability. However, the practical applications of Li 2 C 2 O 4 are limited by its low electrochemical activity and high critical decomposition voltage. In this study, we performed the prelithiation of a low-voltage cathode by using Mo 2 C catalysis and nano-Li 2 C 2 O 4 . Results show that the Mo 2 C catalyst changes the electron cloud distribution around Li 2 C 2 O 4 and greatly reduces the activation energy, thereby significantly accelerating the lithium release from Li 2 C 2 O 4 . The nano-Li 2 C 2 O 4 prepared by freeze-drying shows accelerated ionic and electronic conduction as well as close contact with Mo 2 C. Benefiting from the synergistic effect, the decomposition potential of Li 2 C 2 O 4 is decreased by 0.5 V with an efficiency close to 100%. The LiCoO 2 ∥SiO full cell empowered with the nano-Li 2 C 2 O 4 /Mo 2 C prelithiation composite demonstrates 46.9% higher capacity than the control and thus has great potential for practical applications.
研究领域:
储能
·
材料科学
·
电化学
·
纳米技术
✓ 已验证
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
·
水泥基材料
·
混凝土技术
·
纳米材料应用
·
土木工程材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2026
·
IF 14.9
Jin Zhao,Jie Biao,Tianqi Jia,Guohuang Kang,Geng Zhong,Xinru Wu,Rui Yin,Feiyu Kang,Yidan Cao
The practical application of high-capacity SiO anode is hindered by its low initial Coulombic efficiency (ICE). Chemical prelithiation, employing Li/arene complex (LAC) solutions, offers a promising avenue to mitigate active lithium loss and enhance ICE. However, the complex solvation environment in LAC solution easily leads to uncontrolled, aggressive prelithiation, resulting in SiO particle fracture and excessive SEI formation. To address this, we developed a standardized protocol for quantifying prelithiation degree by monitoring the open-circuit potential of Li||SiO cells. Using Li-2-methylbiphenyl-cyclic ether LAC solution system as a demonstration of this method, we identified a Li-2-methylbiphenyl-tetrahydropyran (LBP) solution with appropriate solvation power and prelithiation kinetics. Combining various characterizations and calculations, it is revealed that weak solvation in LBP solution presents loose Li + -solvent coordination, ensures reasonable desolvation of Li + ions, facilitates controlled mild prelithiation of SiO to form a radially uniform Li x Si distribution, and thus effectively preserving SiO structural integrity and achieving high ICE. Consequently, the full cell demonstrates a significant improvement in capacity retention after 130 cycles from 22.04% to 70.74%. This work provides a universal criterion for evaluating prelithiation degree and offers valuable insights into the kinetic mechanisms governing prelithiation in high-capacity SiO-based anodes.
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yiqing Lu,Chunhai Jiang,Yu Bai,Junwei Wan,Yutao Xing,Zhimin Zou
The scalable application of SiO anode in lithium ion batteries is still limited by its low initial Coulombic efficiency and inferior cycle stability. Compositing SiO with other substances that own high structural stability , fast Li ion diffusion rate and good Li ion storage capacity has been proven of effectiveness to tackle the aforementioned problems. Herein, manganese niobate (MnNb 2 O 6 ) that possesses 3-dimensional Li ion diffusion channels is used to modify SiO anode in conjunction with N-doped carbon coating to improve the Li-ion storage performance. Ex situ XRD measurements reveal that the orthorhombic MnNb 2 O 6 is converted to amorphous Li x MnNb 2 O 6 during lithiation and reversed back to MnNb 2 O 6 in the following delithiation process. The crystal structure of MnNb 2 O 6 is well preserved after a long-term cycle test, suggesting its high structural stability. With such stable structure and ultrafast Li ion diffusion kinetics , the optimized SiO@MnNb 2 O 6 @NC composite anode exhibits obviously improved rate performance and cycle stability as compared to SiO@NC. A reversible capacity of 835 mAh g −1 is maintained at a relatively high current density of 3.0 A g −1 , and a discharge capacity of 799 mAh g −1 is preserved after 200 cycles at 1.0 A g −1 . This work provides a facile and promising strategy to modify SiO-based anode with Columbite-type Nb-based metal oxides towards better Li-ion storage properties.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）