JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Puyue Liu,Yiming Dong,Xiaoxuan Li,Yu Zhang,Zhi Liu,Yingying Lu,Xuewen Peng,Ruifang Zhai,Yiping Chen
The misuse and overuse of chloramphenicol poses severe threats to food safety and human health. In this work, we developed a magnetic solid-phase extraction (MSPE) pretreatment material coated with a multilayered metal – organic framework (MOF), Fe 3 O 4 @ (ZIF-8) 3 , for the separation and enrichment of chloramphenicol from fish. Furthermore, we designed an artificial-intelligence-enhanced single microsphere immunosensor. The inherent ultra-high porosity of the MOF and the multilayer assembly strategy allowed for efficient chloramphenicol enrichment (4.51 mg/g within 20 min). Notably, Fe 3 O 4 @ (ZIF-8) 3 exhibits a 39.20% increase in adsorption capacity compared to Fe 3 O 4 @ZIF-8. Leveraging the remarkable decoding abilities of artificial intelligence, we achieved the highly sensitive detection of chloramphenicol using a straightforward procedure without the need for specialized equipment, obtaining a notably low detection limit of 46.42 pM. Furthermore, the assay was successfully employed to detect chloramphenicol in fish samples with high accuracy. The developed immunosensor offers a robust point-of-care testing tool for safeguarding food safety and public health.
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高影响因子
RSC Advances
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2017
·Vol. 7
·期 87
·55489-55495
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IF 3.108
Yumei Bu,Bin Cui,Weiwei Zhao,Zhenfeng Yang
A carrier possessing simple structure and composition, but with microwave-targeted-fluorescence multifunctional properties to precisely control the delivery of the drug was prepared. Herein, we have constructed the multifunctional Fe3O4@ZnAl2O4:Eu3+@mSiO2–APTES core–shell drug-carrier via direct precipitation method and sol–gel process with surfactant-assistance approach. This carrier is a monodisperse microsphere with an average particle size of 325 nm. Fe3O4 in the core has a high saturation magnetization and provides the Fe3O4@ZnAl2O4:Eu3+@mSiO2–APTES with good drug targeting properties. The ZnAl2O4:Eu3+ interlayer has the characteristic of fluorescent luminescence and can be used to monitor the transport of drugs in the body in real time. In addition, the ZnAl2O4:Eu3+ as a dielectric loss microwave absorbing material combines with the high magnetic loss Fe3O4 to form a composite material, which improved the microwave thermal response. Over 78.2% of VP16 molecules were released under microwave trigger. In addition, mesoporous silica nanoparticles in the outer layer improve the drug loading efficiency through organic modification. The results indicated that this multifunctional drug-carrier with simple structure and composition is a potential controlled drug delivery system in cancer therapy.
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CHEMICAL ENGINEERING JOURNAL
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2018
·
IF 6.735
Ning Li,Yu Tian,Jianhui Zhao,Wei Zhan,Jinying Du,Lingchao Kong,Jun Zhang,Wei Zuo
Efficient and selective capture of phosphate from wastewater is critical to inhibit water eutrophication and supplement phosphate sources. Adsorption, as a simple and environmental-friendly approach, can realize phosphate recovery from wastewater. In order to enhance capture efficiency, adsorption capacity and reusability, magnetic 3D Fe 3 O 4 @ZnO nanocubes with uniform active sites were tailor-designed by hydrothermal-atomic layer deposition method for phosphate removal from water under weak magnetic field (WMF). Ultrafast capture of phosphate (94.8% in 5 min) was achieved by Fe 3 O 4 @ZnO composite under WMF due to the improvement of surface area and electrostatic interaction. More importantly, the synergistic effect of Lorentz force and electrostatic attraction promoted the transfer of phosphate anions to Fe 3 O 4 @ZnO surface and pores in one step, breaking the adsorption limitation induced by intraparticle diffusion. Isotherms fitting indicated that multilayer adsorption occurred on Fe 3 O 4 @ZnO surface with superior adsorption capacity of 100.3 mg/g. Moreover, the Fe 3 O 4 @ZnO exhibited excellent selectivity competing with co-existing matters in wastewater. Mechanism exploration found that inner-sphere complexation by ligand-exchange played a major role in the adsorption process. This easily separable and recyclable adsorbent was demonstrated to be a promising candidate for efficient phosphate capture in real sewage. Also, this study provided a novel approach with WMF application in magnetic separable adsorption system for contaminants remediation.
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BIOSENSORS & BIOELECTRONICS
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2017
·
IF 7.78
Jingyi Luo,Danfeng Jiang,Tao Liu,Jingmeng Peng,Zhenyu Chu,Wanqin Jin
In this work, a novel sandwich-type aptasensor was designed for the ultrasensitive recognition of trace mercury ions in water. Numerous oriented platinum nanotube arrays (PtNAs) were in-situ crystallized on a flexible electrode as a sensing interface, while thionine labelled Fe 3 O 4 /rGO nanocomposites as signal amplifiers. Both PtNAs/CF and nanocomposites were synthesized by easy hydrothermal processes. With their large surface area, it was favorable for electrochemical performance and immobilization of capture DNAs (cDNA) and report DNAs (rDNA). Upon the existence of Hg 2+ , partial linker DNAs were tightly bound with cDNAs through thymine-Hg 2+ -thymine pairing (T-Hg 2+ -T). Then rDNAs attached Fe 3 O 4 /rGO nanoprobes were fixed on the electrode through the match of remaining linker DNAs and rDNAs. Under the optimal conditions, the Hg 2+ aptasensor showed a synergistic amplification performance with a wide linear range from 0.1nM to 100 nM, as well as a low detection limit of 30 pM. Moreover, the as-prepared aptasensor also exhibited reliable performance for assay in real lake water samples.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2018
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IF 2.88
Le Wu,Zheng-Zhong Lin,Jun Zeng,Hui-Ping Zhong,Xiao-Mei Chen,Zhi-Yong Huang
A magnetic fluorescent probe of CdTe QDs/nano-Fe 3 O 4 @MIPs was prepared using CdTe QDs and Fe 3 O 4 nanoparticles as co -nucleus and molecularly imprinted polymers (MIPs) as specific recognition sites based on a reverse microemulsion method. With the specific enrichment and magnetic separation properties, the probe of CdTe QDs/nano-Fe 3 O 4 @MIPs was used to detect malachite green (MG) in fish samples. The TEM analysis showed that the particles of CdTe QDs/nano-Fe 3 O 4 @MIPs were spherical with average diameter around 53 nm, and a core-shell structure was well-shaped with several Fe 3 O 4 nanoparticles and CdTe QDs embedded in each of the microsphere . Quick separation of the probes from solutions could be realized with a magnet, indicating the excellent magnetic property of CdTe QDs/nano-Fe 3 O 4 @MIPs. The probe exhibited high specific adsorption towards MG and excellent fluorescence emission at λ em 598 nm. The fluorescence of CdTe QDs/nano-Fe 3 O 4 @MIPs could be linearly quenched by MG at the concentrations from 0.025 to 1.5 μmol L −1 . The detection limit was 0.014 μmol L −1 . The average recovery of spiked MG in fish samples was 105.2%. The result demonstrated that the as-prepared CdTe QDs/nano-Fe 3 O 4 @MIPs could be used as a probe to the detection of trace MG in fish samples.
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高影响因子
Journal of Saudi Chemical Society
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2018
·
IF 2.456
Bingzhen Li,Xiaodi Weng,Xiaodong Sun,Yang Zhang,Xuliang Lv,Guangxin Gu
In this paper, ternary nanocomposites of Fe 3 O 4 /reduced graphene oxide/polyvinyl pyrrolidone (Fe 3 O 4 /rGO/PVP) as a novel type of electromagnetic microwave absorbing materials were synthesized by a three-step chemical approach. First, Fe 3 O 4 nanospheres were made by solvent thermal method. Successively, the Fe 3 O 4 particles were assembled with rGO after having activated by para -aminobenzoic acid. PVP grafting and reduction of GO happened simultaneously in the third step. It is found that the electromagnetic absorption (EA) performance of synthesized ternary composites with suitable PVP amount had been significantly enhanced comparing to Fe 3 O 4 and Fe 3 O 4 /rGO. Merely 15 wt% low loading in paraffin and thin as 2.8 mm can reach effective EA bandwidth (below −10 Db) of 11.2 GHz, and the highest reflection loss reached −67 dB at 10.7 GHz. It was demonstrated that these composites show an effective route to novel microwave absorbing material design.
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高影响因子
RSC Advances
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2018
·Vol. 8
·期 13
·6887-6892
·
IF 2.936
Shanshan Li,Dongyan Li,Long Sun,Yuewei Yao,Cheng Yao
We fabricated a novel aminophenylboronic acid functionalized magnetic Fe3O4/zeolitic imidazolate framework-8/APBA (denoted as Fe3O4/ZIF-8/APBA). First, Fe3O4 was coated by zeolitic imidazolate framework-8 (denoted as Fe3O4/ZIF-8) using the hydrothermal method. Next, the phenylboronic acid functionalized triethoxysilane reagent was synthesized by 3-aminophenylboronic acid and 3-isocyanatopropyltriethoxysilane, which was modified on the surface of the Fe3O4/ZIF-8 nanocomposite through the sol–gel technique and electrostatic interaction as well as π–π stacking interaction. The synthetic Fe3O4/ZIF-8/APBA exhibited high adsorption capacity and good specificity toward glycoproteins. Moreover, the Fe3O4/ZIF-8/APBA possessed high saturation magnetization (51.41 emu g−1) and achieved better separation in the presence of an external magnetic field. Above all, the as-designed Fe3O4/ZIF-8/APBA was successfully used to capture glycoproteins and identify the horseradish peroxidase (HRP) tryptic digest. This study provides a facile strategy to embellish the aminophenylboronic acid onto the nanocomposite substrate and develop a new material for the specific recognition and enrichment of glycoproteins and low-abundance glycopeptides in proteomics research.
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JOURNAL OF ENZYME INHIBITION AND MEDICINAL CHEMISTRY
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2018
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IF 3.638
Songsong Zhang,Beibei Qiu,Jinhua Zhu,Weiping Hu,Fanyi Ma,M. Z. H. Khan,Xiuhua Liu
Present study aimed to immobilise the α-glucosidase on suitable supports to construct enzymatic microreactors and their subsequent applicability in efficient inhibitor screening from the Chinese Yam (Dioscorea opposita Thunb.) peel. A type of lamellar and porous composites (rGO@Fe3O4) were synthesised with a facile one-step solvothermal method and employed as carriers to construct enzymatic microreactors for screening α-glucosidase ligand from the Chinese Yam peel in league with the high performance liquid chromatography and mass spectrometry (HPLC-MS). The immobilisation amount of α-glucosidase on rGO@Fe3O4 under the optimised conditions was about 40 μg α-glucosidase/mg carriers. Furthermore, the binding capacities of screened inhibitors, 2,4-dimethoxy-6,7-dihydroxyphenanthrene and batatasin I, were 35.6 and 68.2%, respectively. Hence, considering their high screening efficiency and excellent magnetic separation ability, these as-prepared nanocomposite consisting of rGO and Fe3O4 may be potential supports for the enzyme (such as α-glucosidase) immobilisation for rapid α-glucosidase inhibitors screening from the diverse nature resources.
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高影响因子
Crystals
·
2024
·Vol. 14
·期 6
·508
·
IF 2.4
Sumei Li,Jian Ji,Saisai Shan,Sha Chen,Hanbing Li,Qian Xu,Yixuan Liang
Tetrabromobisphenol A (TBBPA) is a kind of widely used brominated flame retardant (BFR), which is proven to be harmful to ecological systems and public health. It is very important to remove TBBPA from the environment. In our study, a magnetic composite named Fe3O4/GO/ZIF-67 was synthesized by a coprecipitation method and applied in the highly efficient adsorption of TBBPA from water. Static adsorption experiments demonstrated that the adsorption capacity could reach 232 mg·g−1within 120 min, which is much higher than those reported in the other literature. The experimental results show that the adsorption of TBBPA on Fe3O4/GO/ZIF-67 followed Langmuir and pseudo-second-order kinetic adsorption models. The main mechanisms for these adsorptions were identified as hydrogen bonds between OH groups in TBBPA and COOHs of Fe3O4/GO/ZIF-67, and π-π stacking between Fe3O4/GO/ZIF-67 and TBBPA. This study provides a method with great promise for the design and synthesis of better adsorbents for the removal of TBBPA from the water environment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Libo Sun,Qingtai Xie,Heshun Jing,Jindong Xie,Wenyu Tan,Baorong Duan,Xun Sun,Caixia Qi,Huijuan Su
The development of nanogold catalysts with high activity and high stability is of great significance for their industrial applications. In this paper, Au-PDA@Fe 3 O 4 catalysts were prepared through the gold sol adsorption method. First, micron-sized magnetic Fe 3 O 4 spheres were synthesized via a solvothermal method, serving as the core to endow the catalyst with excellent recyclability. Subsequently, a layer of polydopamine (PDA) shell was polymerized on the magnetic core surface. By controlling the timing of introducing the gold sol containing Au nanoparticles (NPs), the spatial position of Au NPs within the PDA layer was regulated, leading to a series of magnetic core-shell nano gold catalysts with varying spatial positions of Au. Using the 4-nitrophenol (4-NP) hydrogenation as the probe, the influence of Au spatial position, Au size, and other conditions on the catalytic performance was investigated. Results showed that, in the prepared Au-PDA@Fe 3 O 4 -16 catalyst, the Au NPs are encapsulated within the PDA shell and positioned close to the outer layer. This not only provides remarkable stability to the Au NPs but also maintains their proximity to the surface of the PDA shell, allowing easier access of the substrate 4-NP to the Au NPs and conferring good reactivity upon the catalyst. The strong electron metal-support interaction between PDA and Au enables PDA to effectively stabilize Au NPs. The prepared Au-PDA@Fe 3 O 4 -16 catalyst exhibits excellent stability, maintaining a high conversion rate of 91 % even after 14 cycles of use. Our findings not only deepen the understanding of the catalytic mechanisms involved but also pave the path towards the creation of highly efficient and robust gold-based catalysts, facilitating their widespread utilization in industrial applications.
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ACS Sensors
·
2025
·
IF 9.1
Shanshan Feng,Peiyi Zhang,Hui Chen,Bo Zhou,Ying Qin,Tingting Fan,Qinsheng Sun,Yan Chen,Yuyang Jiang
Colorectal cancer (CRC) is a common malignancy requiring early screening to improve patient outcomes. Current screening methods such as colonoscopy and fecal occult blood tests have several limitations including high cost, poor specificity, invasiveness, and inconvenience. Recent research has identified specific bacterial communities associated with CRC, notably Parvimonas micra (P. micra), which serves as a biomarker for early screening and diagnosis owing to its accumulation in the malignant tissues and feces of CRC patients. Herein, we employed the whole-bacterium systematic evolution of ligands by the exponential enrichment (SELEX) method to isolate high-affinity aptamers against P. micra using 17 selection cycles. These aptamers were subsequently bound to Au@Fe3O4 nanoparticles, and the interaction of P. micra and aptamers inhibited the peroxidase-like activity of Au@Fe3O4 nanoparticles, thereby blocking the 3,3′,5,5′-tetramethylbenzidine (TMB) chromogenic reaction and resulting in a measurable reduction in absorbance. This colorimetric detection strategy demonstrated a linear response across a range of 100–108 CFU/mL for P. micra with a limit of detection of 11 CFU/mL. Using a colorimetric aptasensor, we assessed the abundance of P. micra in clinical fecal samples and found significantly higher levels in the feces of CRC patients as compared to that of healthy individuals, which was consistent with the quantitative polymerase chain reaction results. This study therefore represents the first successful identification of an aptamer with high affinity and specificity for P. micra, leading to the development of a highly specific and sensitive aptasensor for its detection. The presented approach has a significant potential for CRC screening and diagnosis.
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高影响因子
ADSORPTION SCIENCE & TECHNOLOGY
·
2012
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IF 0.606
Jinyu Chu,Bing Wang,Yujun Song,Xiaohua Zou,Chunxiang Li,Yongsheng Yan
A highly selective imprinted amino-functionalized Fe3O4@SiO2 sorbent was prepared by surface molecular imprinting technique for selective removal of trace 2,4-dichlorophenol (2,4-DCP) in water samples. The 2,4-DCP-imprinted amino-functionalized Fe3O4@SiO2 sorbent was characterized by Fourier transform infrared, transmission electron microscopy, vibrating sample magnetometer, thermogravimetric analysis and batch-mode binding studies. The imprinted functionalized Fe3O4@SiO2 sorbent exhibited high selectivity and offered a fast kinetics for the adsorption of 2,4-DCP. The prepared sorbent was shown to be promising for selective removal of trace levels of 2,4-DCP in environmental water samples.
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