Scientific Reports
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2021
·Vol. 11
·期 1
·1-11
·
IF 4.38
Win Theint Theint,Khan Sikandar,Bo Bo,Zada Shah,Fu PengCheng
The purpose of this research was to determine the efficacy of iron oxide nanoparticles (Fe 3 O 4 -NPs) using microalgal products as a plant growth stimulant and antifungal agent. The work was conducted with the phyco-synthesis and characterization of Fe 3 O 4 -NPs using 0.1 M ferric/ferrous chloride solution (2:1 ratio; 65 °C) with aqueous extract of the green microalga Chlorella K01. Protein, carbohydrate and polyphenol contents of Chlorella K01 extract were measured. The synthesized microalgal Fe 3 O 4 -NPs made a significant contribution to the germination and vigor index of rice, maize, mustard, green grams, and watermelons. Fe 3 O 4 -NPs also exhibited antifungal activity against Fusarium oxysporum, Fusarium tricinctum, Fusarium maniliforme, Rhizoctonia solani, and Phythium sp. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) scanning electron microscopy (SEM), transmission electron microscopy (TEM), particle size analysers (PSA), and zeta potential (ZP) measurements were used to characterize these green fabricated magnetite NPs. FTIR analysis showed that the synergy of microalgal proteins, carbohydrtates and polyphenols is responsible for the biofabrication of iron nanoparticles. A spheroid dispersion of biosynthesized Fe 3 O 4 -NPs with an average diameter of 76.5 nm was produced in the synthetic process.
研究领域:
生物技术
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农业科学
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环境科学
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DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 33
·335701
·
IF 3.399
Fei Wang,Chuqing Wang,Hong Chen,Wenlong Zhang,Rujia Jiang,Zhanheng Yan,Zhongyuan Huang,Haihui Zhou,Yafei Kuang
The iron oxide-based anode materials are widely studied and reported due to their abundance, low cost, high energy density and environmental friendliness for lithium ion batteries (LIBs). However, the application of LIBs is always limited by the poor rate capability and stability. In order to tackle these issues, a novel material with carbon-encapsulated Fe3O4 nanorods stuck together by multilevel porous carbon (Fe3O4@C/PC) is prepared through directly carbonizing the Fe-based metal-organic framework under a nitrogen atmosphere. This novel material shows a high specific capacity and rate performance. The initial specific capacity can reach 1789 mAh g−1 at a current density of 0.1 A g−1, and the specific capacity still remains 1105.3 mAh g−1 and 783.5 mAh g−1 after 150 cycles at the current densities of 0.1 A g−1 and 1 A g−1, respectively. Even under a current density as high as 12 A g−1, the specific capacity can achieve 309 mAh g−1 after 2000 cycles with an average attenuation rate of 0.019% per cycle. Overall, the simple strategy, low cost and high capacity can make the practical application possible.
研究领域:
材料科学
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能源存储与转换
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
·
IF 2.298
Rong Wo,Qiu-Lin Li,Chao Zhu,Yan Zhang,Ge-fei Qiao,Kai-yu Lei,Ping Du,Wei Jiang
In this work, a novel core@double-shell three-layer structure adsorbent (Fe3O4@SiO2@Zn–TDPAT) [TDPAT = 2,4,6-tris(3,5-dicarboxyl phenylamino)-1,3,5-triazine] was prepared to remove congo red (CR) and methylene blue (MB). The as-obtained magnetic adsorbent Fe3O4@SiO2@Zn–TDPAT was characterized by X-ray diffraction, Fourier transform infrared spectra, vibrating sample magnetometry, transmission electron microscopy, and scanning electron microscopy. The influencing adsorption parameters including adsorbent amounts, extraction time, pH, and ionic strength were investigated. Under the optimized conditions, the removal efficiencies of CR and MB reached 100 and 99%, respectively. The pseudo-second-order kinetic model and Langmuir model were suitable to illustrate the adsorption processes of CR and MB. The thermodynamic values, including Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°), showed that the adsorption processes were spontaneous and endothermic in nature. Moreover, the obtained nanocomposite remained stable in different acid–alkaline solutions and exhibited good reusability after multiple cycles. All of the experimental results indicated that Fe3O4@SiO2@Zn–TDPAT could be a potential adsorbent to purify dye wastewater.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
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2012
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IF 5.625
Hongying Zhao,Yujing Wang,Yanbin Wang,Tongcheng Cao,Guohua Zhao
A novel electro-Fenton (E-Fenton) system with the Fe 3 O 4 @Fe 2 O 3 /activated carbon aerogel (ACA) composite cathode was firstly constructed in this study. Its application on degrading imidacloprid exhibited highly catalytic efficiency over a wide applicable pH range from 3 to 9. The removal of imidacloprid and TOC achieved to 90% within 30 and 60 min, respectively. The nature of composite cathode was examined by BJH, XRD, SEM, TEM, XPS and FTIR techniques. ACA with high surface area of 2410 m 2 g −1 and multiplicated porosities composed of micropores and mesopores worked not only as cathode but also as Fenton catalyst support, enhancing oxidation activity. We proposed reasonable E-Fenton oxidation mechanisms with Fe 3 O 4 @Fe 2 O 3 /ACA cathode at acidic and basic conditions. At pH 3, it followed a Haber–Weiss mechanism that the dissolved iron ions and surface Fe(II) sites catalyzed the decomposition of H 2 O 2 to generate hydroxyl radicals ( OH). While at pH 9, it was expected the formation and deactivation of H 2 O 2 complex as well as the catalytic decomposition of H 2 O 2 with surface Fe(III) and Fe(II) sites to produce both superoxide anion ( O 2 − /HO 2 ) and hydroxyl radicals ( OH), involving an in situ recycling of iron oxide (FeO·Fe 2 O 3 → Fe 2 O 3 ).
研究领域:
环境科学
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化学工程
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2019
·
IF 3.834
Runren Jiang,Donghai Wu,Guanghua Lu,Zhenhua Yan,Jianchao Liu,Ranran Zhou,Matthew Nkoom
Herein, Fe 3 O 4 quantum dots modified BiOCl/BiVO 4 p-n heterojunction was successfully synthesized by a facile strategy. Multiple techniques were carried out to characterize the as-prepared samples. Results show that the photocatalysts possess regular crystal structure and consisted of BiOCl/BiVO 4 nanosheet structure with Fe 3 O 4 QDs on its surface. Particularly, 20% Fe 3 O 4 QDs@BiOCl/BiVO 4 p-n heterojunction shows universal outstanding photocatalytic activity for removing four different broad-spectrum antibiotics under visible light. Meanwhile, the mineralization degree and degradation pathways of antibiotic were further studied by 3D-EEMs and LC-MS/MS. The improved photocatalytic performance for degradation of broad-spectrum antibiotics mainly attributes to the effective charge carrier mobility, large specific surface areas, and strong visible light absorption. The photocatalytic reaction mechanism was also revealed by the electron spin resonance (ESR) technique and the active species trapping experiments. The photocatalyst stays stable crystal structures after four reaction cycles and it can be easily separated from the solution by an external magnetic field both demonstrate that the Fe 3 O 4 QDs@BiOCl/BiVO 4 p-n heterojunction has unlimited potential for practical usage. This work is expected to be widely applicable to the removal of broad-spectrum antibiotics.
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
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 6
·1-10
·
IF 5.3
Ren Dongxia,Wang Lin,Wei Hua,Mu Shijie,Yang Longfei
Bacterial infection is one of the leading causes of human death globally and is considered to be an urgent public health challenge. It is important to accurately and rapidly detect and kill pathogenic microorganisms. Therefore, a multifunctional platform for sensitive detection and efficient elimination of pathogenic bacteria should be developed to reduce the threat of bacteria. In this study, an integrated strategy based on Fe 3 O 4 -quaternary ammonium chitosan-polyetherimide-Cu-aptamer (Fe 3 O 4 -QCS-PEI-Cu-aptamer) and ladder-branch hybridization chain reaction (HCR) was proposed for the detection and inactivation of Staphylococcus aureus ( S. aureus ). The aptamer-complementary chain (aptamer-CP) conjugated to the surface of Fe 3 O 4 -QCS-PEI-Cu induces CP release in the presence of S. aureus , further initiating the ladder-branch HCR reaction and achieving signal amplification. Under optimal conditions, the developed sensor demonstrated a limit of detection (LOD) of 3 CFU/mL for S. aureus and exhibited high selectivity against several other pathogenic bacteria. Moreover, the Fe 3 O 4 -QCS-PEI-Cu-aptasensor showed potent antibacterial properties under near infrared (NIR) irradiation, achieving an antimicrobial efficiency of 99.946%. This strategy synergistically combined the high-sensitivity molecular detection with the antibacterial activity of novel nanomaterials activated by near infrared light, providing a new insight into the prevention of bacterial infections. Graphical
研究领域:
生物医学工程
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微生物学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Hui Huang,Bin Huang,Yichun Huang,Jinbei Yang,Yinnv Ye,Yucheng Chen
Attractive environmentally friendly magnetic metal-organic framework (MOF) nanocomposite GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) was synthesized by a solvothermal method and characterized by X-ray diffraction, Fourier transform infrared, scanning electron microscopy, Brunauer– Emmett–Teller, and vibrating sample magnetometer, and used as an effective adsorbent for the removal of orange G from aqueous solution. The various operating parameters that effect the adsorption process, such as adsorbent dosage (0.01–0.2 g), pH (1.0–10.0), initial concentration (50–400 mg L –1 ), and temperature (298.15–318.15 K) were studied. The percent removal of orange G increases with the increment of the adsorbent dosage and decrease of the initial concentration, and the optimum pH is 6.0. The Redlich–Peterson model can be favorably applied to describe the adsorption equilibrium data, indicating that the surfaces of GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) nanocomposite for the orange G adsorption are made up of homogeneous adsorption patches. The adsorption kinetics indicate that the adsorption process of GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) toward orange G obeys the pseudo-second-order model and the activation energy is 16.5 kJ mol –1 . Thermodynamic parameters, ΔH = 39.81 kJ mol –1 , ΔS = –46.80 J mol –1 K –1 , and ΔG < 0, exhibit that the adsorption is exothermic and spontaneous. The maximum adsorption capacity of orange G onto GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) nanocomposite is 128.8 mg g –1 . Therefore, magnetic GO@ Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) nanocomposite can be employed as an environmentally friendly and efficient adsorbent for the orange G removal from wastewater.
研究领域:
环境科学
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纳米技术
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材料科学
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化学工程
·
水处理
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Shuhuai Li,Chaohai Pang,Xionghui Ma,Yuwei Wu,Mingyue Wang,Zhi Xu,Jinhui Luo
To broaden the applicability of electrochemiluminescence (ECL) sensors toward the sensitive and selective detection of trace antibiotic residues, new ECL reagents are required. Herein, a novel molecularly imprinted sensor based on an aggregation-induced ECL reagent was fabricated for the sensitive detection of ciprofloxacin (CFX). A covalent organic framework with aggregation-induced ECL (COF-AIECL) was synthesised using a boric acid condensation dehydration reaction. Then, an electrode surface was modified with COF-AIECL as a signal element and nanozymatic ferriferrous oxide@platinum nanoparticles (Fe 3 O 4 @Pt NPs) as a signal amplification element. Subsequently, using CFX as a template molecule, a molecularly imprinted polymer (MIP) was fabricated on the modified electrode. The ECL signal of COF-AIECL was catalytically amplified by the Fe 3 O 4 @Pt NPs, whereas CFX effectively quenched this signal. Consequently, the ECL signal was controlled by CFX elution from and adsorption by the MIP, thus establishing a new method for CFX detection. The sensitivity of the sensor was greatly enhanced by the aggregation-induced luminescence effect and nanozyme amplification, whereas the MIP effectively improved the selectivity for CFX. Under optimal conditions, the electrochemical sensor exhibited a linear detection range of 2 × 10 −12 to 3 × 10 −9 mol L −1 , with a detection limit of 5.98 × 10 −13 mol L −1 . Furthermore, in untreated milk samples, CFX recoveries of 92.0%–111% were achieved. Thus, the developed sensor exhibited good reproducibility, stability, and selectivity for CFX detection.
研究领域:
分析化学
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环境科学
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生物医学工程
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2018
·
IF 2.746
Kai Hu,Jingyi Qiao,Xiangxiang Wu,Huaixia Yang,Yanjie Huang,Shusheng Zhang
A novel magnetic sorbent has been synthesized by co-polymerization of calixarene ionic liquid and mercaptan-modified Fe 3 O 4 particles. This material was used as a sorbent for dispersive solid phase extraction of trace-level flavonoids in the samples of bottled fruit juice and green tea without other pre-treatments. The experimental parameters were investigated and optimized. Coupled with high performance liquid chromatography, an analytical method was established and successfully applied to the determination of flavonoids in these beverages. The proposed method showed good linearity for the analytes with a correlation coefficient ( r ) > 0.9982, and detection limits for the flavonoids ranged 0.15–0.75 ng mL −1 were achieved. The proposed method has been used successfully to determine flavonoids in bottled fruit juice and green tea samples with satisfactory recoveries of 92.5–104.8% and relative standard deviations ≤ 5.2%. The results suggest that poly(calixarene ionic liquid) modified Fe 3 O 4 nanoparticles can be used in the extraction of flavonoids in beverage samples.
研究领域:
分析化学
·
食品科学
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DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2021
·
IF 1.134
Hong-Ying LIU,Han-Xiao XU,Lang-Lang ZHU,Jia-Jun WEN,Yu-Bin QIU,Chun-Chuan GU,Li-Hua LI
The sodium lignosulfonate (SL) modified Fe 3 O 4 (Fe 3 O 4 -SL) nanoparticles with excellent peroxidase-like activity were prepared by one-step solvothermal method, which were applied to sensing hydrogen peroxide (H 2 O 2 ) and glutathione (GSH) with color change. Firstly, the morphology and composition of Fe 3 O 4 -SL nanoparticles were characterized. The results showed that the synthesized Fe 3 O 4 -SL nanoparticles had a spherical structure with an average diameter of 220 nm. Subsequently, the peroxidase-like activity of Fe 3 O 4 -SL nanoparticles was investigated by catalyzing the formation of blue-colored oxidized TMB (ox-TMB) by 3,3’,5,5’-tetramethylbenzidine (TMB) in the presence of H 2 O 2 . Mechanism studies showed that the Fe 3 O 4 -SL nanoparticles exhibited better catalytic activity than natural horseradish peroxidase (HRP), and the catalytic pathway abode by the ping-pong mechanism. Finally, the colorimetric sensor for H 2 O 2 was established, which had a linear range of 0.5–150 μmol/L, a detection limit of 0.139 μmol/L and good selectivity. In addition, according to the decolorization reaction of ox-TMB and GSH and the scavenging effect of GSH on hydroxyl radicals, a colorimetric GSH sensor was further constructed. Based on the above results, a colorimetric detection platform for GSH was built, by which a detection range of 0.5–25 μmol/L and a detection limit of 0.08 μmol/L were obtained. The results above showed that the colorimetric sensing system constructed here had a wide detection range, good selectivity and stability for detection of GSH, which would provide an important reference in food monitoring, biomolecule detection and other fields.
研究领域:
生物化学
·
分析化学
·
纳米材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Linchun Nie,Shuangying Li,Xiaozhong Gao,Shuai Yuan,Guangyu Dong,Guojin Tang,Denghao Song,Lutong Bu,Qingxiang Zhou
Norfloxacin is widely used owing to its strong bactericidal effect on Gram-negative bacteria. However, the residual norfloxacin in the environment can be biomagnified via food chain and may damage the human liver and delay the bone development of minors. Present work described a reliable and sensitive smartphone colorimetric sensing system based on cobalt-doped Fe 3 O 4 magnetic nanoparticles (Co-Fe 3 O 4 MNPs) for the visual detection of norfloxacin. Compared with Fe 3 O 4 , Co-Fe 3 O 4 MNPs earned more remarkably peroxidase-like activity and TMB (colorless) was rapidly oxidized to oxTMB (blue) with the presence of H 2 O 2 . Interestingly, the addition of low concentration of norfloxacin can accelerate the color reaction process of TMB , and blue deepening of the solution can be observed with the naked eye. However, after adding high concentration of norfloxacin, the activity of nanozyme was inhibited, resulting in the gradual fading of the solution. Based on this principle, a colorimetric sensor integrated with smartphone RGB mode was established. The visual sensor exhibited good linearity for norfloxacin monitoring in the range of 0.13-2.51 µmol/L and 17.5-100 µmol/L. The limit of visual detection was 0.08 µmol/L. In the actual water sample analysis, the spiked recoveries of norfloxacin were over the range of 95.7%-104.7 %. These results demonstrated that the visual sensor was a convenient and fast method for the efficient and accurate detection of norfloxacin in water, which may have broad application prospect.
研究领域:
环境科学
·
分析化学
·
生物医学工程
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DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Chili Zhao,Xun Liu,Xia Zhang,Hong Yan,Zhilei Qian,Xinghui Li,Zhenye Ma,Qiaorong Han,Chonghua Pei
In this paper, Fe 3 O 4 /chitosan/isoniazid magnetic nanoparticles (Fe 3 O 4 /CS/INH-MNPs) were prepared as an environmental stimuli-responsive drug-delivery system by automated in situ click technology, in which Fe 3 O 4 magnetic nanoparticles, chitosan and isoniazid were simultaneously in situ crystallized by one-step method. The Fe 3 O 4 magnetic nanoparticles and tripolyphosphate act as stable crosslinkers to produce numerous intermolecular crosslinkages for the mobility of the chitosan chains. Characterization results indicated that the multifunctional drug delivery system with optimized size, excellent loading capacity, well magnetic properties, nontoxicity and pH triggered drug release property is expected to be applied in tuberculosis treatment with excellent magnetic sensitivity and sustained release.
研究领域:
药学
·
生物医学工程
·
纳米医学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）