DESALINATION
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2024
·
IF 8.3
You Zhou,Lei Xu,Sheng-Jie Han,Cai-Hua Liu,Yi-Bin Li,Ming-Lai Fu,Baoling Yuan
Solar-driven interfacial photothermal evaporation (SIPE) has been considered as a green and sustainable technology for obtaining fresh water, and the exploring efficient photothermal materials is crucial. Nanocomposite derived from metal-organic framework exhibits high light absorption properties and excellent chemical stability, making it an ideal candidate in the SIPE. Herein, Fe 3 O 4 /C nanocomposite was obtained using MIL-101 (Fe) as a precursor, and Fe 3 O 4 /C-based porous hydrogel (Fe 3 O 4 /C-PH) was subsequently prepared through chemical crosslinking foaming polymerization. The obtained Fe 3 O 4 /C-PH exhibited an evaporation rate of 3.33 kg m −2 h −1 under one sun intensity. Fe 3 O 4 /C-PH demonstrated outstanding desalination and salting out resistance when treating real seawater. Moreover, it could remove over 99 % of dyes from wastewater. The photothermal mechanisms are molecular thermal vibration of C component and semiconductor relaxation of Fe 3 O 4 . Meanwhile, the hydrophilic and porous skeleton structure of the hydrogel ensure Fe 3 O 4 /C-PH to transport water rapidly and exhibit good light absorption properties. This research broadens the candidate of photothermal materials for applications in SIPE, and also provides new avenues for desalination and wastewater purification.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
CURRENT MICROBIOLOGY
·
2025
·Vol. 82
·期 6
·1-10
·
IF 2.6
Zhang Pei,Yang Huanggen,Ahmad Malik Taj,Zheng Qi,Nie Guochao,Ahmad Ayesha,Raza Muslim,Raza Saleem
Biofilm formation presents significant challenges in healthcare, food processing, and water treatment, contributing to antibiotic resistance and persistent infections. Effective strategies to combat biofilm-associated infections are urgently needed. This study introduces a novel approach to biofilm removal by bio-functionalizing T4 bacteriophage with modified Fe 3 O 4 nanoparticles (NPs) and Nisin, an antibacterial peptide, to form the Fe 3 O 4 -Phage-T4 + Nisin complex. The aim is to enhance antimicrobial efficacy and biofilm eradication. The Fe 3 O 4 -Phage-T4 + Nisin complex was synthesized by conjugating T4 bacteriophage with modified Fe 3 O 4 NPs and Nisin. The antimicrobial and antibiofilm activity of the complex was evaluated against multidrug-resistant Pseudomonas aeruginosa strains ( PA01 and PA14 ) using biofilm inhibition and eradication assays. Stability and efficacy were further tested across a pH range of 5 to 8. The Fe₃O₄-Phage-T4 + Nisin complex exhibited superior biofilm removal compared to its individual components. The integration of Nisin broadened the antibacterial spectrum, targeting both Gram-positive and Gram-negative bacteria , while the modified Fe₃O₄ NPs enhanced phage penetration and bacterial cell disruption. The complex demonstrated significant biofilm inhibition and eradication, addressing the challenge of biofilm-related antibiotic tolerance, which often necessitates high antibiotic doses. Additionally, it maintained stability and efficacy across varying pH conditions.
研究领域:
微生物学
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生物技术
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医药科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Haotian Hao,Xu Huang,Yao Zhang,Shuo Xu,Yili Wang,Baoyou Shi
The efficient removal of phosphate from aqueous systems is critical for mitigating eutrophication and enhancing aquatic ecological sustainability. In this study, a regenerable magnetic composite material, designated as MLCit, was synthesized via an in-situ embedding method. This composite integrates a novel phosphate-binding lanthanum citrate complex (La-Cit) with Fe 3 O 4 nanoparticles to achieve efficient phosphate removal. Comparative analysis revealed that MLCit-1 (La/Fe molar ratio = 1:1) exhibits enhanced adsorption performance relative to four other magnetic lanthanum-based composites (La 3+ /Fe 3 O 4 , La 2 (CO 3 ) 3 /Fe 3 O 4 , La(OH) 3 /Fe 3 O 4 , and La 2 O 3 · x H 2 O/Fe 3 O 4 ). Specifically, MLCit-1 demonstrated a phosphate adsorption capacity 1.5–9 times higher than these counterparts, with an initial adsorption rate 1.46–2.22 times greater. The phosphate adsorption capacity increased significantly with more lanthanum proportion in MLCit. Structural characterization confirmed that MLCit-4 (La/Fe molar ratio = 4:1) adopts a core–shell structure, comprising Fe 3 O 4 nanoparticles encapsulated by amorphous La-Cit. The maximum adsorption capacity of MLCit-4 reached 77.85 mg P/g, with equilibrium achieved within 3 h at a dosage of 0.5 g/L. MLCit-4 exhibited broad pH applicability (4–11), exceptional anti-interference ability, and achieved residual phosphate concentrations below 0.05–0.1 mg P/L in four environmental water samples (TP < 5 mg P/L). The exhausted MLCit-4 could be easily regenerated by 3 h treatment of the 2.5 M NaOH and 1.875 M NaCl mixture. Remarkably, MLCit-4 retained its phosphate removal efficacy over 20 consecutive adsorption–desorption cycles, while simultaneously enabling the enrichment of phosphate in the desorbent. Mechanistic studies identified ligand exchange between P and citrate, forming inner-sphere complexes, with supplementary contributions from electrostatic interactions.
研究领域:
环境科学
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水处理技术
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DOI
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 47
·期 5
·1666-1673
·
IF 4.029
Yan Lv,Lin Yue,Qian Li,Baoyi Shao,Sen Zhao,Haitao Wang,Shijia Wu,Zhouping Wang
Herein, the design and synthesis of a multifunctional (Fe3O4-NaYF4:Yb,Tm)@TiO2 photocatalyst through a facile sol–gel process combined with electrostatic self-assembly has been reported. Particularly, as an upconversion sensor, NaYF4:Yb,Tm nanoparticles have the ability to convert near-infrared (NIR) light into ultraviolet (UV) emissions, so that the catalytic body TiO2 can indirectly utilize the NIR part of sunlight but not UV light. The excellent photocatalytic activity of the hybrid samples is evaluated using a model of the degradation of methylene blue (MB). Most importantly, the obtained materials exhibit remarkable magnetic properties because of the addition of a magnetic component (Fe3O4), therefore, the photocatalysts possess desired recyclability and reusability, which is significant for actual applications. Finally, the possible photocatalysis mechanism of the nanohybrids is discussed and hydroxyl radicals (OH˙) are confirmed as the main reactive species.
研究领域:
材料科学
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环境科学
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纳米技术
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DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
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2020
·
IF 6.793
Mengjie Hao,Pan Gao,Dian Yang,Xuanjin Chen,Feng Xiao,Shaoxia Yang
The emergence of organophosphorus flame retardants and the efficient removal from aquatic environments have aroused increasing concerns. The Urea functionalized Fe 3 O 4 @LDH (Urea-Fe 3 O 4 @LDH) was prepared and used to adsorb triphenyl phosphate (tphp) for the first time. The tphp adsorption capacity was up to 589 mg g −1 , and the adsorption rate reached 49.9 mg g −1 min −1 . Moreover, the influences of various environmental factors (pH, ionic strength and organic matter) on the tphp adsorption on the Urea-Fe 3 O 4 @LDH were investigated. The initial pH of the solution significantly affected the tphp adsorption, whereas the ionic strength and HA slightly affected the adsorption. The main adsorption mechanism was attributed to electrostatic interaction and π-π interaction. We believe that urea is one of excellent functional groups for the tphp adsorption removal and the materials with urea groups as the adsorbents exhibit good prospects in the future.
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 NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 1
·407-413
·
IF 1.354
Zhu Yuanna,Wang Jianrong,Wang Yingzi,Song Xueling,Xu Yanan,Yang Ping
Fe3O4@AlOOH adsorbent with high efficient adsorption capacity was successfully synthesized by controlling the hydrolysis rate for aluminum isopropoxide (AIP) and introducing inductive agent thioglycolic acid (TGA). Al(OH)3-TGA clusters played a key role
in the formation of Fe3O4@AlOOH adsorbent with lamellar structure. Morphology characterization revealed that magnetic Fe3O4 nanoparticles were uniformly deposited on the surface of AlOOH. The lamellar structure of AlOOH and the strong magnetic intensity
of Fe3O4 were helpful for its rapid separation from solution under external magnetic field. Hence, the sample could be regenerated easily and reused in the later adsorption–desorption cycles. The as-prepared sample exhibited ultrafast adsorption rate and high adsorption
capacity in the removal of Congo Red (CR) from aqueous solution. The maximum adsorption capacity of Fe3O4@AlOOH towards CR was 280.90 mg/g and CR was completely removed from the aqueous solution within 60 seconds. The adsorption process was well described by the Langmuir
isotherm model. Electrostatic adsorption was considered as the main adsorption mechanism. Moreover, Fe3O4@AlOOH sample tended to adsorb CR more effectively in the neutral and acidic solution.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
WATER RESEARCH
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2014
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IF 5.323
Chao Shan,Zhiyao Ma,Meiping Tong,Jinren Ni
Fe 3 O 4 @SiO 2 magnetic nanoparticles modified by grafting poly(1-vinylimidazole) oligomer (FSPV) was fabricated as a novel adsorbent to remove Hg(II) from water. Fourier transform infra-red spectroscopy confirmed the successful grafting of oligomer , and thermogravimetric analysis showed FSPV had a high grafting yield with organic content of 22.8%. Transmission electron microscopy image displayed that FSPV particles were polymer-coated spheres with size of 10–20 nm. With saturation magnetization of 44.7 emu/g, FSPV particles could be easily separated from water with a simple magnetic process in 5 min. The Hg(II) adsorption capacity of FSPV was found to be 346 mg/g at pH 7 and 25 °C in 10 mM NaCl. Moreover, the removal of Hg(II) by FSPV was not obviously affected by solution pH (from 4 to 10) or humic acid (up to 8 mg/L as TOC). The presence of seven common ions including Na + , K + , Ca 2+ , Mg 2+ , Cl − , NO 3 − , and SO 4 2 − (up to 100 mM ionic strength) slightly increased the adsorption of Hg(II) by FSPV. X-ray photoelectron spectroscopy analysis revealed that the N atom of the imidazole ring was responsible for the bonding with Hg(II), whereas the bonding of Hg with N did not result in cleavage of Hg–Cl bond in HgCl 2 and HgClOH. The regeneration of Hg(II)-loaded FSPV could be achieved with 0.5 M HCl rapidly in 10 min, and the removal of Hg(II) maintained above 94% in five consecutive adsorption–desorption cycles. Therefore, FSPV could serve as a promising adsorbent for Hg(II) removal from water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 32
·19604-19610
·
IF 3.108
Xiaofang Qi,Lu Xiong,Jing Peng,Dongyan Tang
One major issue in thermosensitive drug delivery systems is the remote, repeatable control of temperature in vivo through external stimuli such as light, ultrasound, and magnetic field. In this study, an Fe3O4/p(NIPAM-co-MAA) composite microgel (Nms) was fabricated via copolymerizing NIPAM with MAA in water-containing Fe3O4 nanoparticles modified by oleic acid. The photothermal effect and thermal-responsibility of Nms were investigated by adjusting the amount of MAA and Fe3O4 in the reaction, and the result shows an LCST of 37.2 °C, which could be elevated to 45.8 °C under laser treatment at 808 nm. In the drug release experiment, the data show that the drug can be released at an expected rate by controlling the temperature using an 808 nm laser irradiation in vivo. The release rate was fast and the final cumulative drug release rate increased by about 25%. Thus, these properties of the Fe3O4/p(NIPAM-co-MAA) Nms microgel indicate its promising application in multi-responsive microgels, especially in photothermal drug carriers.
研究领域:
材料科学
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生物医学工程
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药剂学
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产品关联
DOI
高影响因子
Particuology
·
2018
·
IF 2.785
Xiaojing Liu,Yangcheng Lu
Solvent exchange is widely used to synthesize magnetic nanoclusters (MNCs). However, it remains a challenge to increase the production and decrease the addition of surfactants, both of which are important for the application and functionalization of MNCs. Herein, we use a rapid and tunable mixing method to control the assembly of Fe 3 O 4 nanoparticles. This method involves shear-mixing in a channel of a T-junction micromixer. Smaller and more monodisperse MNCs were synthesized with less surfactant, when compared with conventional bulk synthesis. Varying the mixing rate and the formula of the magnetic suspension allowed for the flexible adjustment of the nanocluster size while maintaining a uniformly sized MNCs. The flow synthesis and ease of scale-up make this method potentially suitable for broad industrial application.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Wen Xue,Yang Hu,Fujun Wang,Xudong Yang,Lu Wang
High specific-surface-area porous poly(caprolactone) (PCL) membranes combined with Fe 3 O 4 nanoparticles were fabricated by electrospinning technology. Their applications as catalysts in Fenton reactions to degrade methylene blue (MB) were evaluated in the presence of H 2 O 2 and UV light . The results indicated that the fibrous catalyst system illustrated efficient MB removal performance (99% of MB degradation rate) and was viable after 6 cycles (96% of MB degradation rate). Besides, the morphology, chemical composition , magnetic and mechanical properties were also accessed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, magnetometry , and strain-stress curves. The outstanding catalytic behaviors of the composites are attributed to synergy of porous surface and embedded Fe 3 O 4 nanoparticles. It also shows advantages of being environment-friendly and separated easily without an external magnetic field.
研究领域:
材料科学
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环境科学
·
催化化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yinchuan Yang,Yumin Zhu,Jiabin Chen,Xuefei Zhou,Yalei Zhang
Advanced oxidation processes based on peroxymonosulfate (PMS) hold remarkable promise for addressing emerging organic pollutants (EOPs) and are worthy of systematic investigation. However, the existing technology has not been widely applied due to bottlenecks such as reaction efficiency. Herein, we proposed a novel system incorporating nitrilotriacetic acid (NTA) as a functional ligand to enhance the activation of PMS by Fe 3 O 4 , thereby facilitating a better efficiency for the degradation of EOPs. Results indicated that the system can achieve an optimal removal rate of 99.6% for atrazine (ATZ) in the presence of NTA. Quenching experiments and electron paramagnetic resonance techniques were employed for mechanism exploration. The results revealed that the enhanced Fe(II)/Fe(III) cycling on the surface of Fe 3 O 4 , triggered by the addition of NTA, accelerates the reduction of trivalent iron and continuously activates PMS to generate radicals, particularly SO 4 − . The mechanistic analysis showed that in the first stage, the lower degradation efficiency could due to the self-quenching of the free radicals, with the uncomplexed Fe(II) and Fe(III) on the surface, the free NTA in the solution, or with the PMS, in addition to reacting with the pollutants. In the second stage, the ATZ achieved rapid degradation as the concentration of substances competing for free radicals decreased. Our work elucidates the key role of NTA functional ligand in the Fe 3 O 4 /PMS advanced oxidation processes, which may provide new approach for the efficient degradation of EOPs.
研究领域:
环境科学
·
化学
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 81
·51142-51150
·
IF 3.108
Ruilian Li,Jian Zhao,Fengxia Yang,Yingchao Zhang,Daniele Ramella,Yu Peng,Yi Luan
A novel magnetic Fe3O4@P4VP(poly(4-vinylpyridine))@FeCl3 core–shell structure was successfully synthesized. Its Fe3O4@P4VP core was initially prepared via polymerization of 4-vinyl pyridine on the surface of Fe3O4 microspheres. The successful introduction of the FeCl3 moiety as a catalytic active site was achieved through coordination interaction between P4VP and FeCl3. The obtained Fe3O4@P4VP@FeCl3 catalyst was applied in the selective oxidation of alcohols using molecular oxygen as the oxidant. It was shown that a variety of alcohol substrates is tolerated under optimized reaction conditions. Additionally, benzylic oxidation of hydrocarbon compounds was also evaluated using Fe3O4@P4VP@FeCl3 as the catalyst and tBuOOH as the oxidant, achieving high yields and very good selectivities. The heterogeneity of the Fe3O4@P4VP@FeCl3 core–shell catalyst was tested and the initial activity was maintained after five reuses.
研究领域:
化学
·
催化科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）