Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Yanhua Cui,Jian Zheng,Zengkai Wang,Binrong Li,Yongsheng Yan,Minjia Meng
How to endow the photocatalytic membrane with excellent efficiency and high permeability has always troubled scientific researchers. Herein, this work proposed an alternative strategy to controllably induce magnetic core-shell structured Fe 3 O 4 @TiO 2 nanoparticles to move towards the membrane surface under magnetic field, significantly maintaining a high-water flow rate and enhancing the photocatalytic degradation efficiency. The presence of Fe 3 O 4 in Fe 3 O 4 @TiO 2 facilitates the electron-hole separation efficiency and maintains the high redox ability of photogenerated electrons in TiO 2 . The characterization results indicated the Fe 3 O 4 @TiO 2 nanoparticles were successfully migrated to the membrane surface. As expected, the FTM(Y) had higher porosity (85.56%), higher pure water flux (1536.47 L m −2 h −1 bar −1 ) and better antifouling performance (5.24% of BSA static adsorption) than that of FTM(N) (1054.26 L m −2 h −1 bar −1 , 6.62%). Meanwhile, the FTM(Y) exhibited excellent photocatalytic and self-cleaning activity, the FTM(Y) showed 1.3 times enhancement in visible light (λ > 420 nm) driven photocatalytic degradation efficiency of tetracycline compared to that of the FTM(N) without magnetically induced. The ·O 2 - and·OH radicals and photogenerated h + played the primary role in photocatalytic degradation process. This work provides new insight into the design of highly efficient photocatalytic membrane to treat wastewater and enhance water purification .
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of Water Process Engineering
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2023
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IF 7
Meng Zhang,Shu Jiang,Xishou Guo,Xiaobin Tang,Langming Bai,Jinlong Wang,Han Zhang,Daliang Xu,Rui Wu,Luming Liu,Heng Liang
Membrane fouling increases operational expenses and limits the application of ultrafiltration technology in water treatment . To mitigate the membrane fouling, this study incorporated Fe 3 O 4 nanoparticles (NPs) into the polyethersulfone (PES) membrane casting solution, and developed a non-solvent induced phase separation (NIPS) method assisted by a magnetic field (MGF) to fabricate the Fe 3 O 4 NPs composite ultrafiltration membrane. The combination of MGF and Fe 3 O 4 NPs synergistically enhanced the permeability and separation performance of the composite membrane. The performance of the membrane was determined by its structure. With the involvement of MGF, Fe 3 O 4 NPs were enriched on the surface layer of the membrane, resulting in enhanced hydrophilicity of the composite membrane. The membrane permeability increased to 913.39 LMH·bar −1 , and the rejection performance rose to 93 % due to the formation of tiny pores on the membrane surface that facilitated solvent diffusion during phase separation, thereby counteracting the adverse effects of heightened viscosity in the casting solution. Moreover, the Fe 3 O 4 NPs composite membrane fabricated with MGF induction exhibited significantly enhanced antifouling capability in multi-cycle fouling tests, resulting in a 27.5 % increase in specific flux compared to the pure PES membrane. Additionally, the preparation procedures for the matrix membrane were optimized to include 15 wt% PES, 3 wt% PVP, and a pre-treatment time of 30 s. These findings have significant implications for advancing the widespread application of membrane technology .
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Scientific Reports
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2025
·Vol. 15
·期 1
·1-13
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IF 3.9
Zhang Min,Jiang Liwen,Wang Shuo,Zhang Shoujun,Liu Meng,Zhang Yuping,Zhang Huiyun,Tian Zhen
Terahertz spectroscopy has drawn great interest for the detection and characterization of biological matter, but its limited sensitivity to biomolecules with weak changes in dielectric properties with varying concentration has hinders potential bio-sensing applications. Here, a novel terahertz sensor was developed for enhancing the ability to detect biomolecules based on two electromagnetically induced transparency (EIT) metamaterials coupled with gold nanoparticles (AuNPs) integrated with biomolecules. The electrostatic interaction between AuNPs and positively charged biomolecules generates localized field enhancement at the biomolecule–metamaterial interface, resulting in a threefold increase in sensitivity for positively charged histidine that exhibit weak dielectric property changes with varying concentration. As a contrast, glucose shows a weaker effect due to its electrostatically neutral nature. Experimental studies reveal that by evaluating the modulation depth (MD) and modulation enhancement (ME) factors of the transmission peak for histidine and glucose in the presence of AuNPs, we achieve and enhance intuitive detection and discrimination of these biomolecules. Additionally, a two-EIT metamaterial with a 1 × 2 pixel array enables multiparameter imaging, visualizing the concentration and spatial distribution of biomolecules. Our results not only significantly improve the response sensitivity of biomolecules with weak dielectric properties in the terahertz domain, but also provide a new idea for developing high-sensitivity functionalized terahertz biosensors and advancing multi-biomolecular analysis and imaging techniques.
研究领域:
生物物理学
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材料科学
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分析化学
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Xuran Guo,Zaijin Tao,Zhenzhen Dai,Yinghua Gao,Chengzhen Chu,Cunyi Fan,Shen Liu,Xin Ma,Fangchun Jin,Zhengwei You,Jia Jiang
A multifunctional bone tissue engineering scaffold combining spontaneous biomineralization with magnetically induced dynamic mechanical stimulation is developed to promote stem cell osteogenic differentiation and accelerate matrix formation. Inspired by the “rebar-concrete” structure, a composite scaffold (PGS-P@MGel) combines 3D-printed phosphate-modified poly(glycerol sebacate) (PGS-P) with a hydrogel containing PDA@Fe 3 O 4 magnetic nanoparticles (MGel). The 3D-printed framework provides spontaneous mineralization and structural integrity, accelerating calcium deposition and providing stable support. The magnetic hydrogel injected into the scaffold enables controllable dynamic mechanical signals under external magnetic fields, directing stem cell fate. Mechanotransduction activates the Piezo1 pathway, inducing β-catenin and YAP overexpression to enhance osteogenesis. In vitro/vivo studies demonstrate this functionalized composite scaffold exhibits excellent biocompatibility, promotes angiogenesis, enhances osteogenic differentiation efficiency, and demonstrates superior osteogenic capacity under the influence of an external magnetic field. This multifunctional scaffold, with its spontaneous mineralization and mechanoactive, effectively regulates stem cell osteogenic differentiation and promotes bone defect repair, opening new dimensions for the development of bone tissue engineering scaffolds and providing valuable insights for large-scale bone defect repair.
研究领域:
生物材料学
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再生医学
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骨科
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DOI
高影响因子
IEEE Transactions on Terahertz Science and Technology
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2024
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IF 3.9
Jiaojiao Yu,Gan Liu,Xuan Zhang,Jianyuan Qin
Imidacloprid is a common insecticide which can remain in water, soil, and plant parts with long-term consumption, threaten environment and human health. Therefore, it is necessary to propose an effective method for imidacloprid detection. Here, a terahertz metamaterial based on electromagnetically induced transparency (EIT) is theoretically and experimentally demonstrated. This metamaterial displays an EIT resonance at 0.89 THz and the physical mechanism of the EIT effect is investigated by analyzing the electric fields and surface current distribution. The EIT resonance can be modulated by changing the geometric structure parameters of the metamaterial. This metamaterial can be used to detect the thickness and the refractive index of the dielectric layer based on the EIT resonance, and can achieve a refractive index sensitivity of 210 GHz/RIU. The detection of imidacloprid shows that the frequency shift and the transmittance change at peak are depend on the change of imidacloprid concentration. The minimum detectable imidacloprid concentration reaches a level of 0.01 ppm in this case. These results theoretically and experimentally prove the feasibility of terahertz metamaterial based on EIT resonance applied in the detection of imidacloprid concentration.
研究领域:
环境科学
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生物医学工程
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光学工程
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DOI
高影响因子
MICROCHIMICA ACTA
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2023
·Vol. 191
·期 1
·1-10
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IF 5.7
Yue Yao,Ouyang Hezhong,Ma Mingyi,Yang Yaping,Zhang Haoda,He Aolin,Liu Ruijiang
A “turn-on” aptasensor for label-free and cell-free EpCAM detection was constructed by employing magnetic α-Fe 2 O 3 /Fe 3 O 4 @Au nanocomposites as a matrix for signal amplification and double-stranded complex (SH-DNA/Apt probes) immobilization through Au-S binding. α-Fe 2 O 3 /Fe 3 O 4 @Au could be efficiently assembled into uniform and stable self-assembly films via magnetic-induced self-assembly technique on a magnetic glassy carbon electrode (MGCE). The effectiveness of the platform for EpCAM detection was confirmed through differential pulse voltammetry (DPV). Under optimized conditions, the platform exhibited excellent specificity for EpCAM, and a strong linear correlation was observed between the current and the logarithm of EpCAM protein concentration in the range 1 pg/mL–1000 pg/mL ( R 2 = 0.9964), with a limit of detection (LOD) of 0.27 pg/mL. Furthermore, the developed platform demonstrated good stability during a 14-day storage test, with fluctuations remaining below 93.33% of the initial current value. Promising results were obtained when detecting EpCAM in spiked serum samples, suggesting its potential as a point-of-care (POC) testing. Graphical Abstract
研究领域:
生物化学
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医学诊断
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纳米技术
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Mengdan Yan,Haoyang Tian,Zhong Liu,Xiangbing Wu,Li Yu,Zhiyun Ma,Yongxia Gu,Wenzhong Wang,Shaoze Yan,Xuemei Chen,Jieliang Zhao
Multilayered soft underwater robots achieve superior performance in deep-sea environments through enhanced environmental adaptability and structural dexterity. However, the insufficient interfacial bond strength of conventional multilayer structure designs is often compromised by interface layering and limited drive modes, leading to the interlayer peeling and poor reconfigurability. Here, a novel programmable functional gradient hydrogel is developed based on a magnetic field-guided gradient distribution, the structure-function integrated design of which is achieved by the gradient distribution of Fe 3 O 4 /polydopamine hybrid nanoparticles (FPHPs) with photo-thermal responsive properties into a temperature-sensitive hydrogel network. This hydrogel effectively avoids interfacial failure issues in traditional multilayer materials due to its seamless gradient structure. Upon 808 nm near-infrared (NIR) irradiation, the localized heating to 59.6 °C underwater creates a temperature gradient, which in turn induces a asymmetric swelling force for actuation. Experimental results demonstrate that the hydrogel can achieve controllable bending deformation of 180° within 5 s while maintaining initial deformation capability after more than 50 deformation cycles. We developed an underwater smart optical sensor utilizing hydrogel deformation to precisely modulate infrared tube exposure area, enabling RGB-LED multicolor tunable display for enhanced deep-sea optical communication. Furthermore, exploiting the programmable magnetization of FPHPs, we constructed various soft robots including an integrated jellyfish-inspired prototype with precisely controlled locomotion. This work advances flexible underwater robotics by solving interfacial stability problems and pioneering hydrogel-based underwater optical sensors, enabling intelligent deep-sea exploration.
研究领域:
生物医学工程
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智能材料
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软体机器人
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海洋工程
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纳米复合材料
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Hao Ai,Liangzhi Qiao,Liangshen Zhao,Shasha Li,Kaifeng Du
Creating anisotropic interconnected macropores is an efficient way to improve the adsorption ability of adsorbents in terms of fast adsorption, high separation resolution, and high flow hydrodynamics. In this work, a kind of poly(styrene@acrylic acid) monolith with anisotropic macropores was facilely fabricated via magnetically induced coprecipitation polymerization. For this preparation, the external magnetic force (25 mT) on the swollen magnetic latexes in acrylic acid monomers and n-hexadecane served as the key point, which directed these latexes being aligned into anisotropic porous skeleton. Subsequently, the aligned polymer latexes were polymerized into a very tough and anisotropic porous monolith. The proposed porous monolith was analyzed by various physical characterization, by which it exhibited the anisotropic macropores centered at 8.5 μm, specific surface area of about 37 m2 g–1, and high permeability of 1.385 × 10–14 m2, respectively. Finally, the anisotropic porous monolith was evaluated for adsorption efficiency. And, its adsorption capacities reached 52.76 mg g–1 for Cu2+ and 116.14 mg g–1 for Co2+, respectively. All these results proved that the constructed anisotropic porous channels facilitated the improved adsorption abilities in terms of capacity, separation speed, and resolution.
研究领域:
材料科学
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环境工程
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高分子化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Ruijiang Liu,Shuai Pan,Min Liu,Wei Huang,Zhixiang Lv,Aolin He
A label-free electrochemical biosensor with magnetically induced self-assembly based on peptide nucleic acids (PNA) and Fe 3 O 4 /Fe 2 O 3 heteroplasmon nanorods was successfully fabricated to detect the single nucleotide polymorphism (SNP) of CYP2C9*3. The sensitivity of the electrochemical biosensor was improved by introducing PNA and Fe 3 O 4 /Fe 2 O 3 @Au nanocomposites. The Fe 3 O 4 /Fe 2 O 3 @Au nanocomposites were assembled on the surface of the magnetic glassy carbon electrode (MGCE) by magnetic field, and the thiolated PNA were connected to the nanocomposites through Au-S bonds. The biosensor exhibited a good linear correlation between 1 pM and 1 µM (R 2 = 0.9941), and the limit of detection (LOD) and the limit of quantitation (LOQ) were 0.95 pM and 3.18 pM, respectively. Besides, the electrochemical biosensor could recognize single-base mismatch DNA, and it could be stored stably for 15 days at 4 °C.
研究领域:
生物传感器
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电化学
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分子诊断
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纳米技术
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遗传学
✓ 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）