JOURNAL OF MEMBRANE SCIENCE
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2025
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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
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Membranes
·
2023
·Vol. 13
·期 5
·514
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IF 4.2
Yinghao Lin,Atian Xie,Jian Xu,Changguo Xue,Jiuyun Cui,Jianming Pan
Oil pollution caused by a large number of industrial activities and oil spill accidents has posed serious harm to the environment and human health. However, some challenges remain with the existing separation materials, such as poor stability and fouling resistance. Herein, a TiO2/SiO2fiber membrane (TSFM) was prepared by a one-step hydrothermal method for oil-water separation in acid, alkali, and salt environments. The TiO2nanoparticles were successfully grown on the fiber surface, endowing the membrane with superhydrophilicity/underwater superoleophobicity. The as-prepared TSFM exhibits high separation efficiency (above 98%) and separation fluxes (3016.38–3263.45 L·m−2·h−1) for various oil-water mixtures. Importantly, the membrane shows good corrosion resistance in acid, alkaline, and salt solutions and still maintains underwater superoleophobicity and high separation performance. The TSFM displays good performance after repeated separation, demonstrating its excellent antifouling ability. Importantly, the pollutants on the membrane surface can be effectively degraded under light radiation to restore its underwater superoleophobicity, showing the unique self-cleaning ability of the membrane. In view of its good self-cleaning ability and environmental stability, the membrane can be used for wastewater treatment and oil spill recovery and has a broad application prospect in water treatment in complex environments.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Yang Hu,Xiaoyan Lin,Datong Liu,Lili Liang,Chunxia Pang,Xunhai Pan
Oil-water emulsion separation could improve the efficiency of oil resources and reduce environmental pollution. The efficiency of oil-water separation was directly affected by the surface hydrophobicity of the membrane and its reliability and reusability. Therefore, the construction of a reliable and reusable super-hydrophobic surface was very important. In this research, the EFM with sandwich structure of PS-SiO 2 -PVAc-SiO 2 was easily fabricated by a three times liquid phase induction process and heat treatment. The PS-SiO 2 -PVAc-SiO 2 EFM was first formed by a triple liquid phase induction process, then the EFM was heat-treated, the PVAc, which is a heat-sensitive material, resulting in SiO 2 nanoparticles being welded onto PS fibers. The rolling contact angle experiment at an inclination of 8° proved that the PS-SiO 2 -PVAc-SiO 2 EFM has super-hydrophobic properties. Meanwhile, the PS-SiO 2 -PVAc-SiO 2 EFM showed excellent stability and reliability of super-hydrophobic properties after the EFM was washed or taped. In addition, the PS-SiO 2 -PVAc-SiO 2 EFM had self-cleaning function and fine oil-water separation property. The oil-water separation efficiency was over 99.50 % and the flow rate was 68 L/m 2 h. After 5 times of oil-water separation, the flux and separation efficiency did not decrease significantly, which proved that the PS-SiO 2 -PVAc-SiO 2 EFM could be reusable.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Jiahao Wei,Jingtao Bi,Longfei Zhang,Dandan Han,Junbo Gong
Constructing a robust catalytic membrane with simultaneous fast liquid transport and efficient organic pollutant degradation is appealing for efficient organic wastewater treatment. Herein, Fe-doped CoTiO 3 grew uniformly on the SiO 2 fiber membrane to form a catalytic membrane (FCTSM). Benefiting from the great water wettability, FCTSM facilitated fast water transport with low energy consumption and exhibited high physical separation performance (98.4% rejection of oil in the emulsion). The catalytic active sites were fully exposed on membrane surface, which could easily react with peroxymonosulfate and target pollutants. Under the gravity-driven permeation, FCTSM performed decent catalytic degradation property (e.g., 96.3% removal of nimesulide with the flux of 300 L/m 2 ·h) in the presence of peroxymonosulfate. Electron paramagnetic resonance (EPR) spectra and quenching tests found that SO 4 •− and 1 O 2 were involved in pollutant degradation, and the possible degradation pathway of nimesulide was investigated. Besides, the toxicity analyses based on quantitative structure–activity relationship (QSAR) verified the reduced toxicity of degradation products. This work provides an insight into the design of multifunctional membranes and advances the potential applications of heterogeneous catalytic oxidation in environmental remediation.
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
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xiaoyu Wang,Dong Zhang,Jiahui Wu,Iryna Protsak,Shihua Mao,Chunxin Ma,Meng Ma,Mingqiang Zhong,Jun Tan,Jintao Yang
Continuously growing interest in the controlled and tunable transport or separation of target molecules has attracted more attention recently. However, traditional “on–off” stimuli-responsive membranes are limited to nongradient feedback, which manifests as filtration efficiency that cannot be increased or decreased gradually along with the different stimuli conditions; indeed, only the transformation of on/off state is visible. Herein, we design and fabricate a series of robust salt-responsive SiO2@cellulose membranes (SRMs) by simply combining salt-responsive poly[3-(dimethyl(4-vinylbenzyl)ammonium)propyl sulfonate] (polyDVBAPS)-modified SiO2 nanoparticles and cellulose membranes under negative-pressure filtering. The antipolyelectrolyte effect induces stretch/shrinkage of polyDVBAPS chains inside the channels and facilities the directional aperture size and surface wettability variation, greatly enhancing the variability of interfacial transport and separation efficiency. Due to the linear salt-responsive feedback mechanism, the optimal SRMs achieve highly efficient target macromolecule separation (>75%) and rapid oil/saline separation (>97%) with a continuous gradient and adjustable permeability, instead of simply an “on–off” switch. The salt-responsive factors (SiO2-polyDVBAPS) could be reversibly separated or self-assembled to membrane substrates; thus, SRMs achieved unprecedented repeatability and reusability even after long-term cyclic testing, which exceeds those of currently reported membranes. Such SRMs possess simultaneously a superfast responsive time, a controllable gradient permeability, a high gating ratio, and an excellent reusability, making our strategy a potentially exciting approach for efficient osmotic transportation and target molecule separation in a more controllable manner.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Jiangtao Xu,Songmin Shang,Shouxiang Jiang
Conventionally, the surface-enhanced Raman spectroscopy (SERS) measurement is performed by dispersing noble metal nanoparticles onto the target sample directly or assembling noble metal nanoparticles onto a micro-sized substrate. Despite it is flourishing, this method is not adequate for various samples, mainly limited by either a defined confinement of the test position or the complex extraction process of the target sample on the irregularly shaped surface, besides the costive materials, complex and uncontrollable fabricating processes. Herein, we demonstrate that the α-Fe 2 O 3 thin film is decorated with Ag nanoparticles constructed on SiO 2 fibers as a flexible SERS-active substrate, which yields a functional optical enhancement of the signal at 532 nm laser excitation . It shows a high enhancement factor of 4.71 × 10 5 , ultrahigh sensitivity of 10 −15 M, and excellent signal stability with a relative standard deviation (RSD) of 1.22% and reproducibility with a RSD of 0.258%.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）