Journal of Physical Chemistry C
·
2015
·
IF 4.772
Tianran Lin,Jing Wang,Liangqia Guo,Fengfu Fu
Molybdenum disulfide (MoS2) has received tremendous attention due to the earth-abundant composition and high catalytic activity. However, the catalytic activity of MoS2 except electro- and photocatalytic has seldom been explored. Herein, Fe3O4@MoS2 core–shell composites were prepared for the first time by in situ growth of MoS2 nanosheets on the surfaces of Fe3O4 nanoparticles under different temperature, and the catalytic performance of the resulting composites was evaluated by using the catalytic reduction of 4-nitrophenol to 4-aminophenol. FE-SEM, TEM, XRD, and XPS analyses verified the core–shell structure with MoS2 nanosheets of defect-rich and oxygen incorporation on the surfaces of Fe3O4 nanoparticles. Fe3O4@MoS2 composites were found to exhibit a high catalytic activity for the reduction of 4-nitrophenol with the highest activity factor k = 3773 min–1 g–1. A plausible catalytic mechanism for the reduction of 4-nitrophenol was also proposed. This study presents an inexpensive, reusable, fast, and highly efficient catalyst for the reduction of 4-nitrophenol without noble metals.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 16
·2288
·
IF 5.3
Haibing Hu,Yunhu Hu,Baozhu Xie,Jianxiong Zhu
Currently, heavy metal ion pollution in water is becoming more and more common, especially As (III), which is a serious threat to human health. In this experiment, a glassy carbon electrode modified with Fe3O4/MoS2nanocomposites was used to select the square wave voltammetry (SWV) electrochemical detection method for the detection of trace As (III) in water. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) showed that Fe3O4nanoparticles were uniformly attached to the surface of MoS2and were not easily agglomerated. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) showed that Fe3O4/MoS2has higher sensitivity and conductivity. After optimizing the experimental conditions, the Fe3O4/MoS2-modified glassy carbon electrode exhibited high sensitivity (3.67 μA/ppb) and a low detection limit (0.70 ppb), as well as excellent interference resistance and stability for As (III).
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
Soft Matter
·
2018
·Vol. 14
·期 10
·1917-1924
·
IF 3.709
Guangshuo Wang,Yingying Ma,Guohua Cui,Nannan Li,Xufeng Dong
Superparamagnetic Fe3O4 nanoparticles were successfully deposited on the surface of MoS2 nanosheets (Fe3O4/MoS2) by a sonochemical method and the obtained Fe3O4/MoS2 nanocomposites were used as a promising candidate for a magnetorheological (MR) fluid. This MR fluid was prepared from the Fe3O4/MoS2 nanocomposites and its corresponding MR performances were examined using a rotational rheometer. The MR fluid based on Fe3O4/MoS2 showed typical MR effects with increasing viscosity, shear stress, yield stress and dynamic shear modulus depending on the applied magnetic fields. Compared with commercial carbonyl iron (CI) particles, the sedimentation stability of the Fe3O4/MoS2–MR fluid was greatly improved because of its unique two-dimensional structure and the reduced fluid–particle density mismatch. Therefore, the prepared Fe3O4/MoS2-based MR fluid with typical MR effects and good sedimentation stability would have great potential in practical applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Fanpeng Ran,Yulin Zou,Yixuan Xu,Xiaoyan Liu,Haixia Zhang
A kind of core-shell material with regular shape and size, and uniform composition, is prepared in aqueous phase and used for laccase immobilization. Magnetic Fe 3 O 4 nanoparticle is coated with MoS 2 by self-assembly, and the Fe 3 O 4 @MoS 2 is further coated by polyethyleneimine, which acts as a spacer arm and is beneficial to enzyme immobilization. The nanocarrier affords the high loading capability of 120 mg/g and satisfied activity recovery of 90% for laccase. The immobilized laccase is stable in a wider range of pH (3–10), temperature (20–70 °C) and storage time (1–14 days), as well as having the recyclability (1–10 cycles). The carcinogenic persistent organic pollutants (malachite green, bisphenol A, bisphenol F) in the water are degraded by the immobilized laccase with a higher efficiency (82.7%, 87.6%, 70.6%) than free laccase (14.4%, 85.0%, 48.0%), respectively. It is prospected that the constructed material is qualified as green nanoreactor for biological macromolecules immobilization.
研究领域:
环境科学
·
生物技术
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shiyao Yan,Shiping Shao,Yunxiang Tang,Xin Zhang,Chan Guo,Luxue Wang,Jiurong Liu,Lili Wu,Fenglong Wang
Aerogel-based composites, renowned for their three-dimensional (3D) network architecture, are gaining increasing attention as lightweight electromagnetic (EM) wave absorbers. However, attaining high reflection loss, broad effective absorption bandwidth (EAB), and ultrathin thickness concurrently presents a formidable challenge, owing to the stringent demands for precise structural regulation and incorporation of magnetic/dielectric multicomponents with synergistic loss mechanisms within the 3D networks. In this study, we successfully synthesized a 3D hierarchical porous Fe3O4/MoS2/rGO/Ti3C2Tx MXene (FMGM) composite aerogel via directional freezing and subsequent heat treatment processes. Owing to their ingenious structure and multicomponent design, the FMGM aerogels, featured with abundant heterogeneous interface structure and magnetic/dielectric synergism, show exceptional impedance matching characteristics and diverse EM wave absorption mechanisms. After optimization, the prepared ultralight (6.4 mg cm–3) FMGM-2 aerogel exhibits outstanding EM wave absorption performance, achieving a minimal reflection loss of −66.92 dB at a thickness of 3.61 mm and an EAB of 6.08 GHz corresponding to the thickness of 2.3 mm, outperforming most of the previously reported aerogel-based absorbing materials. This research presents an effective strategy for fabricating lightweight, ultrathin, highly efficient, and broad band EM wave absorption materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huayu Wu,Mohan Yue,Lin He,Miao Zhang,Yimin Huang,Chang Sun,Yu Liu,Jindi Wang,Rongguan Lv,Rong Xing
A nanofiber necklace with a box-shaped structure has been designed. The box-shaped template can introduce other transition metal compounds, effectively compensating for the intrinsic defects of electrode materials. α-Fe 2 O 3 nano cubes as the template mix with PAN to get α-Fe 2 O 3 /PAN. And then the α-Fe 2 O 3 nano cubes calcine to form Fe 3 O 4 with more valence state under high temperature, which get the box-shape necklace-like structure Fe 3 O 4 -CNFs. The confined space has formed by high concentrated HCl etching, the box-shaped necklace-like Fe 3 O 4 /MoS 2 carbon nanofibers (BN Fe 3 O 4 /MoS 2 -CNFs) anode material is obtained by hydrothermal method of confining growth of MoS 2 nanosheets. The mixed valence state of Fe 3 O 4 (Fe 3+ /Fe 2+ ) can effectively improve the conductivity of MoS 2 nanosheets. The box-shape necklace structure constructed by α-Fe 2 O 3 nanocube has mesoporous structure and confined space, which can alleviate the volume effect of electrode material. When the electrode material is applied to the SIBs, the reversible capacity is 354 mA h g −1 after 500 cycles at 0.5 A/g, and the specific capacity of 131.5 mA h g −1 can be maintained at 8 A/g. On the one hand, the heterogeneous structure in the confined space alleviates the volume effect of the material, thereby improving the long cycle performance, on the other hand, it effectively enhances the electrical conductivity and increases more lithium/sodium storage sites.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Meimei Xu,Shuai Zhao,Chenglong Lin,Yanyan Li,Weida Zhang,Yusi Peng,Rui Xiao,Zhengren Huang,Yong Yang
Lateral flow immunoassay (LFIA) has been widely used for the early diagnosis of diseases. However, conventional colorimetric LFIA possesses limited sensitivity, and the single-mode readout signal is easily affected by the external environment, leading to insufficient accuracy. Herein, multifunctional Fe3O4@MoS2@Pt nanotags with a unique “pompon mum”-like structure were triumphantly prepared, exhibiting excellent peroxidase (POD)-like activity, photothermal properties, and magnetic separation capability. Furthermore, the Fe3O4@MoS2@Pt nanotags were used to establish dual-mode LFIA (dLFIA) for the first time, enabling the catalytic colorimetric and photothermal dual-mode detection of severe acute respiratory syndrome coronavirus 2 nucleocapsid protein (SARS-CoV-2 NP) and influenza A (H1N1). The calculated limits of detection (cLODs) of SARS-CoV-2 NP and H1N1 were 80 and 20 ng/mL in catalytic colorimetric mode and 10 and 8 ng/mL in photothermal mode, respectively, demonstrating about 100 times more sensitive than the commercial colloidal Au-LFIA strips (1 ng/mL for SARS-CoV-2 NP; 1 μg/mL for H1N1). The recovery rates of dLFIA in simulated nose swab samples were 95.2–103.8% with a coefficient of variance of 2.3–10.1%. These results indicated that the proposed dLFIA platform showed great potential for the rapid diagnosis of respiratory viruses.
研究领域:
生物医学工程
·
病毒学
·
诊断学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Feng Wei,Xinyu Cui,Zhao Wang,Changchang Dong,Jiadong Li,Xiaojun Han
Antibacterial agents with enzyme-like properties and bacteria-binding ability have provided an alternative method to efficiently disinfect drug-resistance microorganism. Herein, a Fe 3 O 4 @MoS 2 -Ag nanozyme with defect-rich rough surface was constructed by a simple hydrothermal method and in-situ photodeposition of Ag nanoparticles. The nanozyme exhibited good antibacterial performance against E. coli (~69.4%) by the generated ROS and released Ag + , while the nanozyme could further achieve an excellent synergistic disinfection (~100%) by combining with the near-infrared photothermal property of Fe 3 O 4 @MoS 2 -Ag. The antibacterial mechanism study showed that the antibacterial process was determined by the collaborative work of peroxidase-like activity, photothermal effect and leakage of Ag + . The defect-rich rough surface of MoS 2 layers facilitated the capture of bacteria, which enhanced the accurate and rapid attack of OH and Ag + to the membrane of E. coli with the assistance of local hyperthermia. This method showed broad-spectrum antibacterial performance against Gram-negative bacteria, Gram-positive bacteria, drug-resistant bacteria and fungal bacteria. Meanwhile, the magnetism of Fe 3 O 4 was used to recycle the nanozyme. This work showed great potential of engineered nanozymes for efficient disinfection treatment.
研究领域:
生物医学工程
·
微生物学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2025
·
IF 6.1
Chenghao Lin,Qianyi Li,Gengliang Liu,Zixuan Xi,Xiaoxia Yan,Shijun Li,Liang He,Pengli Bai
Alzheimer’s Disease (AD), a most common neurodegenerative disease, has aroused people's great attention. Amyloid-β 1-42 (Aβ42) from serum/plasma has been listed as Core 1 biomarker in diagnostic guide and explore an ultrasensitive detection method of Aβ42 is of great significance for early AD diagnosis and treatment. Herein, an ultrasensitive fluorescent biosensor for Aβ42 detection is designed, which is composed of Fe 3 O 4 @MoS 2 microsphere and Au-Ag alloy. Compared with typical single gold nanoparticles in traditional fluorescent biosensor, alloy nanoparticles can generate a stronger electromagnetic field to enhance the fluorescence of quantum dots via surface plasmon resonance, achieve the effect of signal amplification. Importantly, our design significantly improved the limit of detection to 11 ag/mL, with a linear response ranging from 0.1 to 10 4 fg/mL. Moreover, by replacing the detection antibody in the biosensor, it can also be applied to other common AD biomarkers, such as Aβ40 (linear range: 0.1 to 10 5 fg/mL, LOD: 61 ag/mL) and total Tau protein (linear range: 0.1 to 10 5 fg/mL, LOD: 40 ag/mL). The biosensor exhibited excellent performance in both spiked and real serum samples. This fluorescent biosensor based on Au-Ag alloy strategy with ultra-sensitivity and good selectivity, provides a reliable solution for AD’s early diagnosis.
研究领域:
神经退行性疾病
·
生物传感器
·
纳米材料
·
早期诊断
·
荧光检测
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Mengna Li,Rui Liu,Bang Hai,Ruobing Hao,Lei Zhao,Huan Zhan,Cuicui Li,Yanli Ma,Zhizhou Chen
Organophosphorus pesticides pose significant hazards to human health and can even cause fatalities, which necessitates the development of effective detection method. Herein, a magnetic-field-assisted fluorescence biosensing platform was designed for rapid and sensitive detection of organophosphorus pesticides. The underlying principle of this strategy was established upon complementary base pairing between aptamer-upconversion nanoparticles (UCNPs) and cDNA-Fe 3 O 4 @MoS 2 . The stable stem-loop structures could provide the structural foundation enabling the aptamers to specifically recognize target pesticides. The formation of the UCNPs-aptamer-cDNA-Fe 3 O 4 @MoS 2 complex gradually decreased with increasing concentrations of target pesticides, leading to a reduction in fluorescence. Methyl parathion was successfully detected using this platform, achieving a detection limit of 0.002 ng/mL within a linear range of 0.01–100 ng/mL. The proposed method has also been validated in the medicinal and edible homologous foods with good recoveries. The platform could be expanded to detect other targets by using appropriate aptamers and cDNA, broadening its potential applications.
研究领域:
生物传感器
·
分析化学
·
纳米技术
·
食品科学
·
环境监测
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Peifang Chen,Caiyun Jiang,Zhouping Wang,Hong-zhen Lian,Xiaoyuan Ma
As a virulent metabolite, aflatoxin B 1 (AFB 1 ) presented in various cereal grain is tightly implicated in severe human diseases. In this study, 3D plasmonic nanohybirds of Raman molecule 4-mercaptobenzoic acid (4-MBA)-embedded and AFB 1 aptamer-modified bimetallic nanostars as SERS probes bound to magnetic nanoflowers were fabricated and demonstrated as a high-performance SERS-active aptasensor to quantitatively analyze AFB 1 . Bimetallic Au@Ag SERS plasmonic nanoprobes with enhanced properties were capable of enhancing discriminative Raman peaks of 4-MBA. Then, the integration of iron tetroxide nanoparticles (Fe 3 O 4 NPs) and molybdenum disulfide nanosheets (MoS 2 NShs) with huge specific surface area constituted stable 3D Fe 3 O 4 @MoS 2 plasmonic nanoflowers, facilitating the bind of numerous aptamer-based SERS probes via the non-covalent interaction between MoS 2 NShs and aptamer, which were ideal candidates for SERS-active substrates. Additionally, Fe 3 O 4 NPs as magnetic core endowed 3D nanocomposites with specific magnetic separation characteristic that caused the collected SERS hotspots to exhibit superior signal response, and further strengthening the sensitivity in a complex food matrix. Aptamer-target AFB 1 specific recognition triggered linearly diminished 4-MBA signal intensity (I 4-MBA ) on the substrate to achieve a low detection limit of 58.9 pg/mL. Furthermore, the sensor has the potential to be a promising monitoring tool for other trace contaminants.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 6
·1-11
·
IF 5.3
Zhang Xingping,Feng Yujun,Chen Xiaowei,Wang Yuanyuan,Guo Yingli,Yang Xin,Yang Hualin
A sensitive fluorescence and colorimetric dual-mode detection method based on Eu 3+ and Fe 3 O 4 @MoS 2 nanocomposites was constructed. In this technique, tetracycline antibiotics (TCs) chelated with Eu 3+ to form a Eu 3+ -TCs complex which emits red fluorescence at 620 nm through the antenna effect. At the same time, Eu 3+ -TCs complex enhances the peroxidase-like activity of Fe 3 O 4 @MoS 2 to catalyze the oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) that can produce a colorimetric signal. This proposed strategy has been used to detect three antibiotics including oxytetracycline (OTC), tetracycline (TC), and chlortetracycline hydrochloride (HCl-CTC). The linear ranges of the new assay for OTC, TC, and HCl-CTC were 0.1–25 μM, 0.5–25 μM, and 0.05–5 μM with the detection limits of 0.016 μM, 0.039 μM, and 0.036 μM, respectively. Meanwhile, this new method was fast and convenient which can complete the detection in 22 min. The assay has been effectively applied to TCs detection in tap water, lake water and honey with satisfactory recoveries of 90.55–109.86%. Graphical
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）