JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Shibo Yu,Jiesong Tan,Yiqing Zeng,Jianzhong Zheng,Guangyu Zhou,Xiangsen Xu,Yutang Kang,Shipeng Wan,Zhaoxiang Zhong,Weihong Xing
Multifunctional air-purifying materials have attracted much attention in dealing with indoor air pollution including particulate matter (PM) and hazardous gaseous pollutants (e.g., HCHO), while its development faces long-term challenges of high efficiency and low resistance. Herein, we fabricated a novel hierarchical porous structure TiO 2 –SiO 2 (TS) fiber membrane using a handy electrospinning method. The hierarchical porous structure, comprising micropores and mesopores within fibers and fiber stacking-induced macropores, endows the TS fiber membrane with an astonishing specific surface area of 351.4 m 2 g −1 and a high gas permeability of 1079.4 m 3 m −2 ·h −1 ·kPa −1 . The interconnected pore structure offers additional potential pathways for clean air, which contributes to enhancing PM capture and lower filtration resistance. Consequently, the TS fiber membrane showed a gratifying filtration efficiency of 99.89 % for PM 0.3 and 99.98 % for PM 2.5 at a velocity of 5.33 cm s −1 with an air resistance as low as 69.3 Pa. It is noteworthy that the interconnected microporous-mesoporous structure in fiber also facilitates the adsorption and enrichment of HCHO molecules, thereby increasing the local concentration and thus markedly enhancing the catalytic efficiency. As a result, the membrane demonstrated a photocatalytic removal efficiency of 98.46 % for HCHO under UV light at a high gas velocity of 600 L g −1 ·h −1 . Interestingly, we found that the membrane can maintain good long-term cyclic stability by simply replenishing adsorbed water on the surface. This work would provide new insight for developing advanced multifunctional air purification membranes.
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
POLYMER SCIENCE SERIES B
·
2024
·
IF 1
Yawen Guo,Zhao Lielun,Kang Tiantai,Jiang Yan,Zhang Haobin,Zhang Hongwen
Abstract In this paper, TiO 2 particles submicron were prepared by sol-gel method and modified with 3-aminopropyl triethoxysilane (KH550) after coating SiO 2 on its surface. Subsequently, combined with the breath figure method (BF), slippery liquid-infused porous surfaces (SLIPS) of polyimide composites were prepared by a two-step method using TiO 2 /SiO 2 particles, amino terminated polysiloxanes (APT-PDMS), 2,2'-bis[4-(4-aminophenoxyphenyl)]propane (BAPP) and 1,2,4,5-cyclohexanetetracarboxylic dianhydride (HPMDA) as the raw materials. The compositions and properties of the composites were characterized by infrared spectroscopy, nuclear magnetic resonance and thermal weight loss, respectively. The apparent morphology of the porous membrane was observed by scanning electron microscopy, and the hydrophobic properties of the porous membrane were investigated before and after the infilling of the silicone oil by contact angle tester. The results show that the hydrophobicity of the porous substrate prepared when the content of TiO 2 /SiO 2 particles is 15% and the concentration of composite material is 20 mg/mL is the best, and the sliding angle of the oil-filled SLIPS is 2° at the minimum. The SLIPS owns good stability, self-cleaning, and anti-freezing properties and so on.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER TESTING
·
2019
·
IF 2.943
Weibin Jiang,Xiongfei Jin,Huan Li,Shiyu Zhang,Tao Zhou,Huasheng Xie
Silicone-acrylic resin (SAR) was prepared from acrylic monomers and silicone prepolymer by the free radical solution polymerization , and then mixed TiO 2 and SiO 2 nanoparticles modified by KH570 were added to prepare nanocomposite coating . Thermogravimetric analysis and contact angle measurements showed that the acrylic resin modified by silicone prepolymer exhibited an improved thermostability and a better hydrophobicity compared with the unmodified sample. The adding of nanoparticles further increased the hydrophobicity. The contact angle of modified silicone-acrylic resin with mixed TiO 2 and SiO 2 nanoparticles of 3 wt% is the highest, 108.4°. The UV resistance and weather resistance of the modified silicone-acrylic resin are significantly improved. It was also found through electrochemical impedance spectroscopy that the corrosion resistance was significantly improved by the addition of mixed TiO 2 and SiO 2 nanoparticles. Modified silicone-acrylic resin with mixed TiO 2 and SiO 2 nanoparticles of 3 wt% and 5 wt% coating system maintains an excellent anticorrosion performance (coating resistance R c of more than 10 9 Ω cm 2 ) even at 3.5% NaCl electrolyte medium till to 1800 h.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Fan Wang,Hang Luo,Di Zhai,Zhida Xiao,Li Zeng,Xueying Wang,Zhitao Hu,Huan Wang,Lihong Liu,Dou Zhang
Dielectric capacitors consisting of ceramic/polymer nanocomposites have been widely used in electrical and electronic fields due to the advantages of high power density, high stability and improved energy density . However, the mismatching of dielectric constant between ceramics and polymers seriously limits the improvement of energy density of dielectric capacitors. In this work, a novel kind of core-double shell structured ceramic filler BaTiO 3 @TiO 2 @SiO 2 (BT@TO@SO) is prepared by a two-step hydrolysis method and introduced into PVDF for high performance dielectrics. This core-double shell structured filler forms multi-layer interface with gradually reduced dielectric constants of BT, TO, and SO, which is beneficial to enhance the interface polarization and reduce the electric field concentration caused by dielectric mismatch. In addition, the high insulating properties of the outer layer of SO can greatly limit the electron migration and reduce the leakage current. The experimental results show that when the loading of BT@TO@SO filler is low, the nanocomposite can achieve an energy density of up to 19.7 J/cm 3 and an efficiency of 57.6% at 620 MV/m, which shows an obvious improvement compared with filling BT or BT@SO. The results of finite element analysis further verify the superiority of this core-double shell structure.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
Micro & Nano Letters
·
2019
·Vol. 14
·期 3
·323-328
·
IF 0.975
Jidong Wang,Zhijie Gu,Jialin Zhang,Xin Chen,Mengjuan Li,Yuan Yu,Mingqiao Ge,Xiaoqiang Li
In this work, a mesoporous structure TiO 2 /SiO 2 (M-TS) composite with excellent adsorption and photocatalytic properties was fabricated by a sol–gel process combined with calcination. The structure of the samples was characterised by scanning electron microscopy and Brunauer–Emmett–Teller analysis. The factors influencing the adsorption behaviours of methylene blue (MB) onto M-TS, including ingredient, dosage, initial concentration and temperature were investigated. The M-TS was produced by removing poly(vinylpyrrolidone) from the precursor gel was vital to the excellent adsorption capacity. Furthermore, the isotherm and kinetic data were fitted by using Langmuir and Freundlich isotherm models, pseudo-first-order and pseudo-second-order equations, and the intra-particle diffusion model. The Langmuir isotherm model and the pseudo-second-order kinetics were the most suitable models for describing the adsorption of MB onto M-TS. It was also found that the adsorption capacity of cationic dyes on M-TS is better than that of anionic dyes. The experimental results of adsorption and photodegradation proved that improvement of adsorption capacity enhances the decolourisation efficiency. This work shows that the M-TS could be used as an effective adsorbent and photocatalyst to remove cationic dyes from wastewater.
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
CERAMICS INTERNATIONAL
·
2014
·
IF 2.086
Huilin Hou,Lin Wang,Guodong Wei,Jianjun Chen,Weiyou Yang,Bin Tang,Fengmei Gao
TiO 2 nanoparticles are easily aggregated, which greatly hinders their application to be utilized as photocatalysts . One of the effective routes is to make the TiO 2 nanoparticles assembled on/in a solid carrier. In current work we report the fabrication of hybrid TiO 2 /SiO 2 fibers with tunable internal porous structures via a capillary electrospinning technique combined with subsequent high-temperature pyrolysis treatment, in which the porous SiO 2 fiber frameworks could offer a platform to assemble the TiO 2 nanoparticles with a uniform spatial distribution. The resultant fibers were systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). It is found that the introduced concentration of tetrabutyl titanate (TBOT) plays a profound effect on the formation of the hybrid TiO 2 /SiO 2 fibers. The experimental results suggest that tailoring the concentrations of raw material in the precursor solutions could permit the formation of internal structures with solid, hollow and hierarchically porous shapes, enabling the fabrication of hybrid TiO 2 /SiO 2 fibers with tunable structures. Present work could provide a facile strategy for limiting the aggregation of TiO 2 nanoparticles, which could give them a promising high photocatalysis performance.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2024
·
IF 8.4
Zhenfeng Guo,Ze Zhu,Xiaoqian Zhang,Ying Peng,Ziting Huang,Xinqiang Wang,Luyi Zhu,Yongshuai Xie,Guanghui Zhang,Benxue Liu,Dong Xu
High-performance thermally insulating ceramic materials with excellent mechanical and thermal insulation properties are essential for thermal management in extreme environments. In this work, SiO 2 was introduced into the crystalline lattice and grain boundary of TiO 2 to inhibit its phase transition and grain growth. Meanwhile, layered TiO 2 /SiO 2 nanofiber membranes (TS NFMs) were designed and prepared. The TS NFMs had lightweight (44 mg/cm 3 ), high tensile strength (4.55 MPa), ultra-flexibility, and low thermal conductivity (31.5 mW·m −1 ·K −1 ). The prepared TS-1100 NFMs had excellent buckling fatigue resistance, which could undergo 100 buckling-recovery cycles at up to 80% strain. Low density and high diffuse reflectance endow the TS NFMs with excellent thermal insulation effects. A single-layer nanofiber membrane was composed of multiple layers of nanofibers. According to the principle of multi-level reflection, the multilayer structure had a better near-infrared reflection effect. Through the stacking effect of layers, a 10 mm thick sample composed of about 300 layers of nanofiber membranes could reduce the hot surface temperature from 1,200 °C to about 220 °C, demonstrating an excellent comprehensive thermal insulation effect. The layered TS NFMs with ultra-flexibility, high tensile strength and high-temperature resistance (1,100 °C) provide a dominant pathway in producing materials in extremely high-temperature environments.
研究领域:
材料科学
·
热管理工程
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Xinyu Han,Bo Yang,Wanqi Chen,Ruolan Tang,Song Li,Haile Yan,Liang Zuo
Solar-driven interfacial water evaporation desalination has emerged as a promising approach to address the global freshwater scarcity. However, fogging on transparent plates caused by condensation during freshwater collection obstructs light transmission, thereby reducing evaporation efficiency. To overcome this challenge, in this work, we integrated a super-hydrophilic TiO 2 –SiO 2 composite coating onto the transparent glass plates used in the solar-driven interfacial water evaporation desalination system. We systematically optimized the TiO 2 to SiO 2 ratio and synthesis process, and analyzed their anti-fogging performance as well as the photo-induced hydrophilicity mechanisms. The TiO 2 –SiO 2 composite coatings demonstrated remarkable effectiveness in suppressing fogging and enhancing system performance. Notably, the TiO 2 -60 % coated sample exhibited outstanding properties, achieving a water contact angle (WCA) of 2.1° after illumination. Even after 30 days of dark storage, the WCA increased only modestly to 27.8°, but rapidly recovered to a super-hydrophilic state of 7.9° upon re-exposure to light. Additionally, the coating maintained an average transmittance of 92.31 % across the 400–1100 nm wavelength range, surpassing that of bare glass (91.58 %) and ensuring optical clarity throughout a 108-h simulated solar evaporation test. This study not only establishes a theoretical framework for designing self-cleaning anti-fog coatings but also introduces innovative strategies to enhance the efficiency of solar-driven water evaporation technologies.
研究领域:
材料科学
·
环境工程
·
可再生能源
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 23
·5314
·
IF 4.967
Shiwei Li,Luyan Yu,Jianhua Xiong,Ying Xiong,Shuguang Bi,Heng Quan
The hydrophilicity and inherent flammability of cotton textiles severely limit their usage. To solve these drawbacks, a superhydrophobic and flame-retardant (SFR) coating made of chitosan (CH), ammonium polyphosphate (APP), and TiO2-SiO2-HMDS composite was applied to cotton fabric using simple layer-by-layer assembly and dip-coating procedures. First, the fabric was alternately immersed in CH and APP water dispersions, and then immersed in TiO2-SiO2-HMDS composite to form a CH/APP@TiO2-SiO2-HMDS coating on the cotton fabric surface. SEM, EDS, and FTIR were used to analyze the surface morphology, element composition, and functional groups of the cotton fabric, respectively. Vertical burning tests, microscale combustion calorimeter tests, and thermogravimetric analyses were used to evaluate the flammability, combustion behavior, thermal degradation characteristics, and flame-retardant mechanism of this system. When compared to the pristine cotton sample, the deposition of CH and APP enhanced the flame retardancy, residual char, heat release rate, and total heat release of the cotton textiles. The superhydrophobic test results showed that the maximal contact angle of SFR cotton fabric was 153.7°, and possessed excellent superhydrophobicity. Meanwhile, the superhydrophobicity is not lost after 10 laundering cycles or 50 friction cycles. In addition, the UPF value of CH/APP@TiO2-SiO2-HMDS cotton was 825.81, demonstrating excellent UV-shielding properties. Such a durable SFR fabric with a facile fabrication process exhibits potential applications for both oil/water separation and flame retardancy.Keywords:superhydrophobicity;flame retardancy;cotton fabric;layer-by-layer assembly
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Xie Jun,Shi Xiaoyu,Liu Qi,Liu Ziqian,Qiao Chunying,Wang Qi,Xie Qing
The safety and reliability of dry-type film capacitors depend critically on the insulation performance of their dielectric films. Polypropylene (PP) films serve as primary dielectric materials due to their superior insulation properties, high mechanical strength, and excellent heat resistance. With increasing transmission voltages and equipment miniaturization trends, enhancing dielectric film insulation is crucial to ensure ultra-high-voltage (UHV) transmission security. This study incorporates a fluorinated functional layer–modified nanofiller, MMT@T@S-F (MMT@TiO 2 @SiO 2 -F), into PP films via bulk modification. Film breakdown tests demonstrate that at 25 °C, 50 °C, and 75 °C, PP/MMT@T@S-F films exhibit DC breakdown strength increases of 41.26%, 36.26%, and 32.98% respectively, compared to pure PP films. Micro-nano structural analysis reveals elevated interfacial energy levels in MMT@T@S-F nanoparticles. Simultaneously, the organic fluorine modification introduces high-energy charge traps into PP films, further reducing free-moving carriers while maintaining functional effectiveness at elevated temperatures. Graphical abstract
研究领域:
材料科学
·
电气工程
·
纳米复合材料
·
介电与绝缘
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Materials Science
·
2020
·Vol. 14
·期 2
·163-176
·
IF 1.747
Zhang Zhiyu,Hu Lixia,Zhang Hui,Yu Liping,Liang Yunxiao
Novel large-sized mesoporous nanofilm-constructed macroporous SiO 2 (LMNCMS) with two sets of well-defined 3D continuous pass-through macropores (pore size of 0.5–1.0 μm, wall thickness of 40–50 nm) was prepared through a dual-templating approach, and used as an advanced support for TiO 2 nanocrystalline photocatalyst. The structural and optical properties of the as-prepared materials were investigated by various characterization techniques in order to explore the connections between catalysts’ features and catalytic performance. The photocatalytic activities were evaluated by degradations of methylene blue (MB) and phenol under the simulated sunlight irradiation. To gain insight into the impact of preparation and operation conditions on photocatalytic degradation processes, experiments were conducted at wide ranges of the TiO 2 loading content, calcination temperature, solution pH, and photocatalyst dosage. Nano-TiO 2 /LMNCMS exhibited high photocatalytic activity and stability. Rapid matter transport, good accessibility of pollutants to TiO 2 and high light harvesting could mainly account for the superior photocatalytic performance. The trapping experiments were performed to identify the main reactive species in the catalytic reactions.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 2
·95
·
IF 3.504
Yinghan Liu,Se Wang,Zhuang Wang,Nan Ye,Hao Fang,Degao Wang
Metal-based nanoparticles (NPs) are the most widely used engineered nanomaterials. The individual toxicities of metal-based NPs have been plentifully studied. However, the mixture toxicity of multiple NP systems (n≥ 3) remains much less understood. Herein, the toxicity of titanium dioxide (TiO2) nanoparticles (NPs), silicon dioxide (SiO2) NPs and zirconium dioxide (ZrO2) NPs to unicellular freshwater algaeScenedesmus obliquuswas investigated individually and in binary and ternary combination. Results show that the ternary combination systems of TiO2, SiO2and ZrO2NPs at a mixture concentration of 1 mg/L significantly enhanced mitochondrial membrane potential and intracellular reactive oxygen species level in the algae. Moreover, the ternary NP systems remarkably increased the activity of the antioxidant defense enzymes superoxide dismutase and catalase, together with an increase in lipid peroxidation products and small molecule metabolites. Furthermore, the observation of superficial structures ofS. obliquusrevealed obvious oxidative damage induced by the ternary mixtures. Taken together, the ternary NP systems exerted more severe oxidative stress in the algae than the individual and the binary NP systems. Thus, our findings highlight the importance of the assessment of the synergistic toxicity of multi-nanomaterial systems.Keywords:metal-oxide nanoparticles;mixture toxicity;freshwater algae;cellular response;oxidative damage
研究领域:
环境科学
·
毒理学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）