Nanomanufacturing and Metrology
·
2023
·Vol. 6
·期 1
·1-10
·
IF 0
Chen Zanyu,Hu Jiugang,Ding Kuixing,Tan Jun,Hou Hongshuai,Ji Xiaobo
Titanium oxides have been considered promising anode materials for lithium-ion batteries (LIBs). However, the poor conductivity and low specific capacity of bulk titanium oxides limit their application. In this study, a carbon dot-modified TiO 2 @SiO 2 aerogel was successfully fabricated through a facile ambient pressure drying strategy and used as an anode material of LIBs. Benefiting from the crosslinking of carbon dots and the surface modification of SiO 2 , the as-prepared hierarchical aerogel exhibited a high initial discharge capacity of 974 mAh g −1 and maintained a capacity of 299 mAh g −1 after 100 cycles at 0.1 A g −1 . It also retained a discharge capacity of 111 mAh g −1 with a CE of 99.9% at 3 A g −1 . The carbon dot-modified cross-linking skeleton contributes to the structural integrity of the TiO 2 @SiO 2 aerogel during repeated insertion/extraction of lithium ions, guaranteeing outstanding cycling and high-rate performance. This ambient pressure drying strategy provides a facile and feasible way to produce high-performance aerogel anode materials for lithium-ion storage.
研究领域:
材料科学
·
能源化学
·
电化学
✓ 已验证
DOI
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Shibo Yu,Jiaofan Sun,Jiayan Liu,Mengna Zhan,Wentai He,Yiqing Zeng,Zhaoxiang Zhong,Weihong Xing
Inorganic hierarchical porous fibrous membranes demonstrate significant superiority in filtration, adsorption, and catalysis, while the inherent brittleness of inorganic materials and the mechanical fragility from porous structures pose a critical bottleneck to their durability. To overcome this limitation, halloysite nanotubes (HNTs) were integrated into the porous fibers, acting as “nano-rebars” to construct a robust skeleton. This structure facilitated efficient stress transfer and dissipation, significantly enhancing the mechanical robustness of the membrane and increasing the tensile strength to more than twofold. Leveraging the natural electret effect of HNTs, the fiber membrane achieved an exceptional filtration efficiency of 99.85% for the most penetrating PM 0.3 through additional electrostatic adsorption effects. Furthermore, the HNTs-optimized hierarchical pore structure resulted in a remarkably low filtration resistance of 55.2 Pa, while the filtration quality factor could reach up to 0.118 Pa −1 . Additionally, the fiber membrane exhibited remarkable photocatalytic efficacy for formaldehyde (HCHO) degradation, attaining a removal rate of 82.77% within an exceptionally short residence time of merely 0.18 s. This study elucidates the structure-property relationship in inorganic fiber membranes and provides a promising strategy for developing robust, multifunctional air purification materials capable of withstanding harsh conditions.
✓ 已验证
DOI
高影响因子
POWDER TECHNOLOGY
·
2026
·
IF 5.5
Zheng-Hao Li,Li Zhang,Yu-Cui Yang,Xue-Yuan Guo,Ye Sheng,Bing Zhou
Titanium dioxide (TiO 2 ) is widely recognized as a high-performance papermaking filler, yet its extensive industrial application is constrained by its elevated cost. To address this challenge, we developed a sustainable and cost-effective carbonation method to prepare TiO 2 based composite fillers. Using opal as an inorganic support and exploiting the hydrolysis behavior of TiO 2 under CO 2 induction, opal/TiO 2 and SiO 2 /TiO 2 composite materials were successfully synthesized. This approach utilizes inexpensive and renewable carbon dioxide and naturally occurring siliceous minerals, significantly reducing production cost while enhancing the dispersibility and structural stability of TiO 2 . When applied as papermaking fillers, the composites effectively improve paper whiteness, hiding power, and mechanical properties, enabling reduced consumption of pure TiO 2 and promoting environmental and economic benefits. When applied as papermaking fillers, the silica derived from opal imparted a high paper whiteness of up to 94.3%. With increasing TiO 2 content, the opal/TiO 2 composites enhanced paper whiteness from 74.7% to 84.8%. Both composite fillers significantly improved the hiding power of paper, approaching that of pure TiO 2 at high filler loadings. In addition, enhanced filler retention (up to approximately 44.5%) and increased tearing strength (∼106 mN) were achieved, indicating favorable fiber–filler interactions and effective mechanical reinforcement. Beyond practical industrial relevance, this work establishes a novel strategy for fabricating composite materials and elucidates the underlying formation mechanism, offering valuable insights for the development of functional composite fillers. The proposed method demonstrates strong potential for large-scale industrial implementation and contributes to green manufacturing and carbon-utilization technologies.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Qiang Gao,Xiaomei Wu,Xiangsheng Ma
Series of novel energy-saving window coatings based on F–Nb–TiO 2 /SiO 2 nanocomposites with superhydrophobic self-cleaning performance were successfully prepared. Surface modification of F–Nb–TiO 2 and SiO 2 nanoparticles by aminopropyl triethoxy silane and perfluorooctyltriethoxysilane produced hydrophobic powders. With the help of the hierarchical structures of F–Nb–TiO 2 /SiO 2 nanocomposites, superhydrophobic surfaces were obtained. The water contact angle of the composite coatings reached 155.6°. The prepared superhydrophobic coatings shown superior anti-fouling property and good mechanical performance. Furthermore, the composite coating can shield most of solar radiation. The composite coating lowed the air temperature of the simulate house by 11 °C in the outdoor thermal experiments. The integration of good solar filtration and exceptional anti-fouling performance makes F–Nb–TiO 2 /SiO 2 coatings suitable candidates for energy-saving window coatings.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2019
·
IF 1.354
Airong Li,Dan Luo,Lele Jiang,Jie Wang,Yi Zhou
A series of experiments on CO2 hydrate formation were carried out in the presence of titanium dioxide (TiO2), silicon dioxide (SiO2), multi-walled carbon nanotubes (MWNTs) nanoparticles. The effects of these nanoparticles on induction time, final gas consumption, and gas storage capacity have been investigated at the temperature of 274.15 K and the initial pressure of 5.0 MPa.g. The induction time of CO2 hydrate formation was remarkably shortened to 12.5 min in the presence of 0.005 wt% MWNTs nanoparticles. The high thermal conductivity and heat capacity of MWNTs nanoparticles presented better heat transfer, and large surface area provided more suitable sites for heterogeneous nucleation of CO2 hydrate.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2014
·
IF 3.552
Zhenyan Liu,Yue-E. Miao,Mingkai Liu,Qianwei Ding,Weng Weei Tjiu,Xiaoli Cui,Tianxi Liu
A simple and practical strategy has been developed for preparing polyaniline (PANi) coated TiO 2 /SiO 2 nanofiber membranes by a combination of electrospinning, calcination and in situ polymerization. TiO 2 /SiO 2 (TS) nanofibers are fabricated by electrospinning, followed by calcination. Then they are used as template for in situ polymerization of aniline monomers. SEM images show that PANi nanoparticles thus formed can be densely and uniformly coated on the surface of TS nanofibers. Photocatalytic degradation tests show that the as-prepared nanofiber membranes exhibit enhanced photocatalytic activity for degradation of methyl orange under visible light , which may be due to the synergistic effect of PANi and TiO 2 . Furthermore, the effect of polymerization time on the morphology and photocatalytic activity of the membrane is investigated. The free-standing membrane is flexible and easy to handle, which is promising for potential applications in photocatalysis and water remediation fields.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Chuang-Tian Zhan,Jin-Yuan Wu,Kun-Heng Huang,Yun Li,Li-Xiang Wu,Sheng-Jin He,Yang-Qing Liu,Ze-Xi Zhang,Wei-Ming Guo,Jia-Xiang Xue,Hua-Tay Lin
The pressureless-sintered silicon carbide ceramic with and without surface texturing was joined with CaO-Al 2 O 3 -MgO-TiO 2 -SiO 2 glass filler. The experimental results showed that without texturing applied to SiC substrates, the shear strength of SiC joints was 40.8 ± 6.3 MPa, with failure occurring at the interlayer. Unfilled regions in the interlayer limited the shear strength of the joints. When texturing was applied to SiC substrates, SiO 2 layer was formed on the surface of substrates due to high-temperature oxidation, which subsequently promoted the wettability of filler on substrates. The textured grooves on SiC substrates could be filled with glass material during joining process. The shear strength of textured SiC joints was 69.3 ± 9.9 MPa with a mixed-mode failure when the direction of shear load was perpendicular to the texturing direction. The better wettability, larger joining area, and interlocking structure between the glass filler and substrates enhanced the shear strength of textured joints.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Xian Yue,Huaxin Li,Yunsheng Qiu,Zhou Xiao,Xianbo Yu,Chao Xue,Junhui Xiang
Limited by low specific surface area and complex synthesis methods, it is laborious to realize wide utilization of photocatalytic materials. Although various photocatalytic materials have been reported constantly, as a vital prototype of photocatalytic materials with the advantages of low cost, no-toxicity, and high stability, TiO 2 still reveals great research potential. Nevertheless, pure TiO 2 usually present small specific surface area and low photocatalytic activity . Besides, the preparation process of composite photocatalysts based on TiO 2 remain inconvenient. Hence, to enhance the photocatalytic activity of TiO 2 , this work proposed a facile synthesis method to fabricate a TiO 2 @SiO 2 porous core shell structure materials based on our previous research. Specifically, silica microspheres were prepared by one-step method with atmospheric pressure drying. And TiO 2 @SiO 2 composite gel was fabricated by a primitive liquid phase deposition . The whole process retains simple and green and the obtained porous core shell materials display extraordinary specific surface area (over 400 m 2 /g) with high photocatalytic efficiency. Under optimized conditions, the H 2 production rates are roughly 3 times higher than that of P25 powder, which shows great application potential. This study confirms that the photocatalytic performance can be enhanced by improvement of active site area and provides some insights in convenient preparation of TiO 2 based photocatalysts as well.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 7
·4227-4243
·
IF 1.674
Deng Anquan,Zhu Yufu
TiO 2 /SiO 2 /Ag/Ag 2 O and TiO 2 /Ag/Ag 2 O nanocomposite spheres have been synthesized via a low-temperature hydrothermal method using SiO 2 spheres as templates, combined with a light-induced reduction method and a hydrogen peroxide oxidation process. Scanning electron microscopy, energy-dispersive X-ray and X-ray diffraction analyses have demonstrated that Ag and Ag 2 O nanoparticles were successfully deposited on the surfaces of TiO 2 /SiO 2 nanocomposite spheres and porous TiO 2 nanospheres forming nanoheterojunctions. The photocatalytic experiment results reveal that all the as-prepared catalysts possess improved photocatalytic activities compared with P25 nanoparticles. Both TiO 2 /SiO 2 /Ag/Ag 2 O and TiO 2 /Ag/Ag 2 O nanocomposite spheres exhibit excellent photocatalytic performances, which can be attributed to the synergistic effects of different kinds of nanoparticles. The synergistic mechanism of these nanoparticles is also discussed in detail.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yalong Liu,Binjie Xin,Md All Amin Newton,Lifeng Li,Dan Huang
Oil pollution poses severe threats to both ecosystems and human health. This study utilized electrospinning and carbonization processes to fabricate a SiO2-TiO2-C nanofiber membrane (STCNFM) exhibiting photocatalytic self-cleaning properties designed explicitly for oil-water separation. These membranes possess nanoscale rough structures, endowing them with superoleophilicity (0°) and hydrophobicity (138°). Addressing the limitations associated with traditional ceramic membranes, particularly in terms of stability and reproducibility, cyclic experiments confirm the significant stability and reproducibility of this composite membrane, ensuring reliable long-term applications for continuous oil-water separation. Leveraging the synergistic effect of TiO2 and the carbon fiber substrate, STCNFMs-5 demonstrate exceptional separation performance and notable self-cleaning capabilities. Following a 2-h exposure to ultraviolet light, the membrane's flux is restored to its original level. STCNFMs offer a promising solution for efficiently separating oil-water mixtures and emulsions, holding potential importance in water treatment and resource recovery endeavors.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA SCRIPTA
·
2024
·Vol. 99
·期 10
·105910
·
IF 2.6
Jun Xie,Ziqian Liu,Qi Liu,Xiaoyu Shi,Qing Xie
Polypropylene (PP) film is an important component of metallized film capacitors. However, the insulation issues of polypropylene film significantly affect the safe and stable operation of capacitors. In this study, polycyclic aromatic compounds (PAC) were introduced to the surface of TiO2@SiO2 nanoparticles via chemical grafting, preparing Ti@Si-PAC nanofillers, to achieve modulation of the nanoparticle/PP interface. The experimental and simulation results indicate that Ti@Si-PAC/PP exhibits excellent insulation performance. The study indicates that the surface modulation of nanoparticles by PAC introduces a 'soft interface' between the nanoparticles and the polypropylene matrix. The 'soft interface' enhances the interfacial interaction, reduces dielectric loss, and introduces deep traps, exhibiting a significant inhibitory effect on carrier migration. Additionally, the introduction of PAC enhances the electron trapping capability in the interface region, which plays a positive role in quenching free radical chain reactions and reducing the damage of high-energy electrons to polypropylene molecular segments. This study provides an effective method for enhancing the insulation performance of polypropylene.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Hanliang Li,Bandna Bharti,Velu Manikandan,Mohamad S. AlSalhi,Nassar N. Asemi,Yanan Wang,Wenbiao Jin,Feng Ouyang
In this study, we investigated the deactivation kinetics and mechanism of N–F–TiO 2 /SiO 2 nanopowder as a model photocatalyst for the purpose of facilitating the photocatalytic degradation of acrylonitrile (AN) in aqueous environment. Prior research has already displayed the proficient degradation of AN through the utilization of N–F–TiO 2 /SiO 2 catalysts, revealing a degradation efficiency of 81.2% within a span of 6 min at an initial AN concentration of 10 mg/L. Multiple variables including the initial AN concentration, illumination intensity, and initial pH value were extensively analyzed during the degradation process. The kinetics of photocatalytic degradation of AN, facilitated by the N–F–TiO 2 /SiO 2 photocatalyst, were modeled by fitting the pseudo first-order reaction kinetics to each individual factor. Furthermore, the adverse effect of catalyst poisoning during the photocatalytic breakdown of AN using the N–F–TiO 2 /SiO 2 photocatalyst was analyzed through a range of different techniques including SEM, XPS, BET, XRD, TG, and NH 3 -TPD. The incorporation of findings from these diverse techniques revealed that, the primary factors contributing to the photocatalyst's poisoning were as follows: (i) During the degradation process, the build-up of intermediate molecules on active sites hindered their functionality, leading to a decrease in the efficiency of the photocatalytic reaction, (ii) Carbonaceous deposits formed when the catalyst's pore structure was obstructed by pollutants or intermediate products that had not undergone timely photocatalytic breakdown and (iii) The persistent erosion of active sites due to hydraulic forces resulted in inadequate performance of the N–F–TiO 2 /SiO 2 photocatalyst in aqueous solutions. A comprehensive analysis of the deactivation kinetics was conducted, deciding in the formulation of a detailed poisoning mechanism for the N–F–TiO 2 /SiO 2 photocatalyst. Additionally, we explored the catalysts regeneration, involving thermal treatment, ultrasonic irradiation, and catalyst reloading. This study not only advances our insight into the waning performance of catalysts in aqueous media but also establishes a conceptual framework for extrapolating analogous deactivation dynamics in other catalysts, grounded in precedent experimental knowledge. This research contributes to the development of a deactivation model for catalysts in the aqueous environment, based on existing experimental research, providing a theoretical framework for understanding the deactivation process of photocatalysts.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 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）