ANALYST
·
2024
·
IF 3.6
Wanjin Huang,Shufei Tang,Wei Xiao,Yafei Chen,Lijun Li,Jianping Li
A reduced graphene oxide/molybdenum selenosulfide (rGO/MoSSe) heterojunction was synthesized, and a molecularly imprinted photoelectrochemical sensor for the detection of chlortetracycline was prepared. MoSSe was grown in situ on rGO by a hydrothermal method to form an rGO/MoSSe heterojunction, which acts as the sensitive film of the sensor. Since rGO can promote electron transfer and effectively inhibit electron–hole recombination, it effectively reduces the recombination probability of electrons and holes and improves the photoelectric efficiency, thus enhancing the detection sensitivity of the PEC sensor. The rGO/MoSSe was immobilized on an FTO electrode, and molecularly imprinted polymers (MIPs) were prepared by electropolymerization on the rGO/MoSSe-modified FTO electrode with chlortetracycline as the template molecule and o-phenylenediamine as the functional monomer, so as to construct a molecularly imprinted photoelectrochemical (MIP-PEC) sensor. The determination of chlortetracycline was realized by the strategy of a “gate-controlled effect”, and the detection range of the chlortetracycline concentration was 5.0 × 10−13–5 × 10−9 mol L−1 with a detection limit of 1.57 × 10−13 mol L−1. The sensor has been applied to the determination of chlortetracycline in animal-derived food samples.
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yumei Chen,Jialin Zhang,RuiRui Liu,Ying Zhang,Jingming Zhou,Hongliang Liu,Yankai Liu,Ke Yan,Yanhua Qi,Enping Liu,Xifang Zhu,Aiping Wang
A label-free electrochemical immunosensor was developed to rapidly detect tilmicosin (TMC) residues in pork and milk. The immunosensor was constructed by immobilizing a high-affinity monoclonal antibody against TMC on an rGO-PEI-Ag nanocomposite-modified electrode. The rGO-PEI-Ag nanocomposites were prepared by mixing polyethyleneimine (PEI) modified reduced graphene oxide (rGO) with AgNO 3 solution. The prepared rGO-PEI-Ag nanocomposites showed good redox activity and conductivity, as characterized by ultraviolet-visible spectroscopy (UV–Vis), transmission electron microscopy (TEM), and X-ray diffraction (XRD). During the preparation process, staphylococcal protein A (SPA) was added to targetedly bind the Fc segment of the monoclonal antibody. The immunosensor showed a low detection limit (LOD) of 0.0013 ng/mL, a linear range of 0.01–100 ng/mL, and recoveries ranging from 92.77 to 100.02% in pork and 92.26–101.23% in milk. Furthermore, the immunosensor exhibited good stability, reproducibility, and specificity in detecting TMC in pork and milk real samples.
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DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 64
·40673-40681
·
IF 3.108
Xinlin Liu,Yingying Qin,Yongsheng Yan,Peng Lv
A magnetic photocatalyst, CdS/CoFe2O4/rGO, has been successfully prepared via a simple hydrothermal method. The photocatalytic activity of the as-obtained composite photocatalyst was evaluated using the degradation of tetracycline. When compared with single CdS and CoFe2O4, the hybrid material (CdS/CoFe2O4/rGO) can enhance the photocatalytic activity. The photocurrent responses and PL spectra indicate that the composite photocatalyst can effectively separate the electron–hole pairs and restrain their recombination. This was attributed to the high charge carrier mobility of rGO and the heterostructured photocatalytic system, which promotes the separation of charge carriers. In all, the CdS/CoFe2O4/rGO photocatalyst, as a strong magnetic photocatalyst, is promising for further practical application in wastewater treatment.
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DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 5
·1-11
·
IF 2.02
Feng Jiantao,Wang Yechen,Hou Yanhui,Li Liangchao
Hierarchical structured ZnFe 2 O 4 @reduced graphite oxide@TiO 2 (ZnFe 2 O 4 @RGO@TiO 2 ) nanocomposite was prepared by an electrostatic layer-by-layer route, which played a synthetic effect of Fenton oxidation of ZnFe 2 O 4 and photocatalytic oxidation of TiO 2 to degrade fulvic acid (FA) solution under visible-light irradiation. In this method, RGO, as the middle layer, can effectively promote the photo-induced electron flow between the ZnFe 2 O 4 and TiO 2 and further improve the efficiency of the photo-Fenton oxidation. The influencing factors on photo-Fenton oxidation, including solution pH, catalyst, and H 2 O 2 dosage, have also been investigated. The results illustrated that the ternary composite presented the enhanced catalytic performance. Under visible light irradiation, the degradation efficiency of the sample on the FA solution can reach 95.4% within 3 h. In addition, the catalyst exhibited superior stability and reusability, and its degradation efficiency was still up to 90% after 5 cycles. Therefore, the composite will be a kind of efficient photocatalyst and had a promising application for visible-light driven destruction of organic pollutants.
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DOI
高影响因子
POLYMER COMPOSITES
·
2024
·Vol. 45
·期 11
·10220-10233
·
IF 4.8
Pengtu Zhang,Shiling Yuan,Xinwang Song,Junsong Tang,Qilang Lin,Xiaoyun Liu,Qixin Zhuang,Puke Mi,Peiyuan Zuo
As core components in electric/electronic fields, dielectric materials have recently received ever-increasing interests. Among them, polymer-based dielectric composites have drawn ever-increasing attentions due to their high-temperature resistance and excellent processibility. However, state-of-art studies mostly focus on the modification of single-phase filler, while the heterogeneous three phase interactions between fillers and polymer matrix are rarely studied. To fill this gap, in this study, a novel strategy of interfacial design and structural construction of three-phase BaTiO 3 /rGO/polymer nanocomposites have been promoted to simultaneously build interfacial barriers between adjacent rGO nanosheets and to enhance the interfacial polarization of rGO nanosheets for improved dielectric, thermal and mechanical properties. The dielectric constant of 0.6 wt% BT/ARGO/PEI reached 644@1 kHz with a dielectric loss of only 0.218, while these values for 0.5 wt% ARGO/PEI composites are 471 and 0.489, respectively. Meanwhile, the breakdown strength almost doubled (from 48 kV·mm −1 to 87 kV·mm −1 ) upon the addition of BaTiO 3 (BT) nanoparticles. Moreover, the introduced BT nanoparticles significantly enhanced the intermolecular frictions between different materials and contributed largely to promoted mechanical and thermal properties. We therefore speculate this work establishes a strong foundation for fabricating three heterogeneous-phase high dielectric polymer materials with excellent dielectric, thermal and mechanical properties. Highlights Graphene oxide was modified by APTES and reduced by L-Ascorbic Acid. Three-phase BT/ARGO/PEI composites showed enhanced dielectric properties. The incorporated BT nanoparticles reduced the dielectric loss. The thermal and mechanical properties of BT/ARGO/PEI composites are optimized. Interfacial interactions between different phase of materials are studied.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·
IF 2.2
Chen Yang,Ma Haihong,Ren Fengmei,Zhou Zhengfa,Xu Weibing
With the increasing shortage of energy reserves, the exploration of new energy sources is a growing area of research. As a widely used energy storage device, supercapacitors have attracted widespread attention from researchers. In our study, N- and B-modified phenolic foam was prepared by polymerization using phenol and paraformaldehyde as raw materials, urea and 4-formylphenylboronic acid as modifiers of nitrogen and boron, respectively, and adding foaming agent and curing agent. Modified reduced graphene oxide was synthesized by modifying reduced graphene oxide with nickel and cobalt. Finally, modified reduced graphene oxide-doped phenolic resin-based carbon foams were prepared by mixing and carbonizing the above two modified materials. The effects of mass ratio of Ni to Co, carbonization temperature, and different addition amount of activator on the structure and electrochemical properties of the obtained carbon foam materials were studied. The results show that the specific surface area of the carbonized material can reach 744 m 2 /g and the pore volume of the material is 0.496 cm 3 /g when the mass ratio of Ni metal to Co metal salt is 1:1, the mass ratio of activator to modified phenolic foam is 5, and the carbonization temperature is 800°C. And its maximum specific capacitance can reach 1288 F/g at a current density of 1 A/g. When the current density is increased to 10 A/g, its specific capacitance is still maintained at 700 F/g. The electrode has a 65% capacitance retention rate after 1000 cycles. The preparation of carbon foam electrode materials based on phenolic resin provides a theoretical basis for the development of energy storage containers with low cost and high performance.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Cijun Shuai,Jiachi Zhao,Qi Zhong,Shuping Peng,Jun Zan,Zhen Cao
Although photothermal therapy is widely employed for tumor treatment because of its high tumor cell selectivity and low apoptosis resistance, heat-shock proteins (HSPs) impart resistance to heat-induced apoptosis in tumor cells, thus diminishing the therapeutic effectiveness. To this end, tin selenide (SnSe) was grown in situ on reduced graphene oxide (rGO) nanosheets to construct a photothermal–thermoelectric SnSe/rGO nanosystem. The rGO component converted near-infrared light energy into localized thermal energy, resulting in the thermal ablation of tumor cells. Meanwhile, SnSe converted temperature fluctuations into pyroelectric charges, which interacted with surrounding O2 molecules to generate reactive oxygen species that oxidized the amino acids on the HSPs, which changed the protein conformation and functionally damaged the tumor cells. In addition, rGO functioned as an efficient electron acceptor to increase electron mobility, thus enhancing the thermoelectric conversion efficiency of SnSe. Then, the SnSe/rGO nanosystem was incorporated into a poly-l-lactic acid bone scaffold to prevent tumor recurrence. Results showed that the composite scaffold not only exhibited good photothermal and thermoelectric effects. In vitro cell tests demonstrated that the scaffold generated 1O2 based on temperature fluctuations and the antitumor rate reached 86.6% against osteosarcoma MG-63 cells.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Tao Luo,Jinsheng Ye,Wenyan Huang,Ke Li,Yufan Wu,Yeqi Zhu,Siqi Lan,Shengjian Mao,Zhichao Xue,Rongqian Yao
Aimed at making SiC-based composites for thermal protection components to catch up with the increasing Mach number of hypersonic vehicles, a facile strategy is proposed to fabricate lightweight SiC(Zr, rGO) nanocomposite polymer-derived ceramics (PDCs). The key technique is repyrolyzing SiC(Zr, rGO) p /polyzirconocarbosilane–vinyltriethoxysilane–graphene oxide (PZCS–VTES–GO, PZVG) blends. Highly cross-linked PZVG can effectively optimize formability of precursors, and in-situ formed Zr-containing phases are beneficial in preventing further grain growth of β-SiC and improving bonding strength within ceramic network. More interestingly, ZrOSi transition zone tightly coupled with nanocrystals helps to increase structure disorder of amorphous ceramic matrix to tough nanocomposite structure. Particularly, SiC(Zr, rGO) 1300 nanocomposite PDCs own outstanding hardness (8.10 GPa), superior fracture toughness (3.84 MPa·m 1/2 ), high ceramic yield (92.60%), and low linear shrinkage (5.00%). Zr-modification enables them to retain favorable overall performances even after 60 min of oxidation under a 1300°C butane torch flame. Timely self-healing ZrO 2 (ZrSiO 4 )/SiO 2 protective layer can enhance high-temperature oxidation resistance. Meanwhile, ZrO 2 and ZrC have a unique combination of good high-temperature stability/resistance to corrosion, strongly improving structural integrality. As demonstrated, such in-situ construction of nanocomposite system and pyrolytic mechanism open new opportunities for obtaining PDCs with superior high-temperature ablation resistance, toward emerging uses in thermal protection system of hypersonic aerospace vehicles.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zeyu Wu,Linghao Zhao,Yangkun Sun,Yufeng Zhang,Yuerong Wang,Min Zhang,Hongyang Zhang,Fanghong Ning,Ping Hu
Hydrogen peroxide (H 2 O 2 ), a type of reactive oxygen species (ROS) produced by cells, plays a significant role in various physiological processes. Its abnormal concentrations in human body are closely associated with cellular damage as well as a variety of major diseases. Consequently, sensitive and accurate detection of cellular H 2 O 2 concentration is of great significance in evaluating the degree of intracellular oxidative stress in human cells. In this study, a novel heterogeneous nanomaterial, rGO@PDA@MXene-Au@COF, was designed for electrochemical-colorimetric dual-mode detection of intracellular H 2 O 2 , which enhances both peroxidase and electrochemical activities, achieving lower detection limits and broader linear ranges. ESR spectroscopy, EIS resistance analysis and computational simulation were employed to verify the mechanism of the activity enhancement, and the detection conditions were optimized. The methods were subsequently applied to the determination of H 2 O 2 in cells, yielding results of 1.69 × 10 −14 M H 2 O 2 /cell and 1.59 × 10 −14 M H 2 O 2 /cell for electrochemical and colorimetric detection of MCF-7 cells, and 1.67 × 10 −14 M H 2 O 2 /cell and 1.58 × 10 −14 M H 2 O 2 /cell of Hela cells, respectively. These results demonstrated high sensitivity and anti-interference capabilities, enabling quantitative detection of H 2 O 2 in complex cellular environments. Furthermore, the similarity in results between the two methods confirms their mutual accuracy and reliability. This work provided a novel approach for designing multifunctional nanomaterials and detecting H 2 O 2 in cells.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zhipeng Ren,Qian Zhu,Lei Cao,Lanlan Fan,Liang Xu,Shixian Xiong
Dopamine (DA) serves as a vital neurotransmitter involved in reward mechanisms, motor coordination, and cognitive processes, establishing the importance of its reliable detection for diagnosing associated neurological disorders. This study presents a microwave-assisted synthesis strategy for rapid fabrication of TiO 2 /MXene/rGO heterojunction nanomaterials, engineered for ultrasensitive electrochemical DA detection. The ternary composite demonstrated significantly enhanced electrocatalytic performance, attributable to the synergistic combination of abundant oxygen vacancies, exceptional electrical conductivity, and ultrahigh specific surface area. These characteristics collectively provide substantial active sites and enable efficient electron transfer during DA oxidation. As a result, the obtained TiO 2 /MXene/rGO electrode exhibits remarkable analytical performance with dual linear response ranges of 0.01–2.4 μM and 2.4–50 μM, a high sensitivity of 21.893 μA μM −1 , and an ultralow detection limit of 5.1 nM. The sensor also demonstrates excellent reproducibility, repeatability, and outstanding selectivity against interfering substances. Moreover, the sensor was applied to determine DA in real samples with satisfactory results.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hui Ma,Chunyan Tang,Fawen Zhang,Zeqi Tao,Jihui Liu,Bo Yan,Huachao Tao
Vanadium nitride (VN) has sparked much interest because of the abundant reserves, multivalent states, and high theoretical specific capacity in aqueous zinc-ion batteries (AZIBs). However, the direct utilization of VN in AZIBs is still huge challenges including sluggish kinetics, low-mass-loading and suboptimal cycling stability. Herein, an exquisite method is employed to enhance the electrochemical performance via compositing of VN with nitrogen-doped reduced graphene oxide (VN/N-rGO) and 3D printing technique. The designed conductive network and hierarchical porous structure enhance the reaction kinetics of the electrode and inhibit its dissolution, thereby improving cycling stability. The fabricated electrodes demonstrate superior reversible capacity of 529.8mAh g −1 , excellent long-cycle stability (261.6mAh g −1 after 1000 cycles at 8.0 A g −1 ) and good rate capability. Furthermore, the high-mass-loading VN/N-rGO electrodes (∼13 mg cm −2 ) are constructed through material extrusion 3D printing, and the electrodes still display a high reversible capacity of 390.2mAh g −1 . The electrochemical reaction mechanism of VN with Zn ions has been extensively studied, indicating that VN irreversibly transforms into Zn 3 (OH) 2 V 2 O 7 (H 2 O) 2 during first cycle, and Zn ions reversibly insert into/extract from the interlayer of Zn 3 (OH) 2 V 2 O 7 (H 2 O) 2 during the following cycles. This work demonstrates that VN holds significant potential as high-mass-loading cathode in AZIBs.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Aerzigu Xukeer,Jin Li
In this work, we synthesized the ternary nanocomposite of ZnO/TiO 2 /rGO and used as formaldehyde gas detection at room temperature (RT). The integration of rGO with the ZnO/TiO 2 heterostructure enhanced the composite’s responsiveness at RT. The presence of rGO enhanced conductivity, mechanical stability, and charge transfer, in addition to providing more active sites for CH 2 O molecule adsorption. Sensors based on ZnO/TiO 2 /rGO exhibited a response of 86 to 50 ppm formaldehyde, with response and recovery times significantly shortened to 11 s and 3 s, respectively. Additionally, the selectivity, stability, and repeatability of the sensors were also evaluated. Our method of sequentially combining ZnO with TiO 2 , followed by incorporating rGO to form a ternary heterostructure, effectively optimizes ZnO. This two-step approach addresses the limitations of slow desorption efficiency and low response associated with ZnO. We conducted first-principles computation to understand the sensing performance.
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DOI
高影响因子
危险品化学品经营许可证（带存储）