JOURNAL OF ELECTRONIC MATERIALS
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2025
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IF 2.5
Tan Shangrong,Yao Zhuo,Huang Hong,Liu Zechen,Guo Shiqi,Zhao Xinyun
Electrochemical supercapacitors, given their high power density and excellent cycling stability, have broad applications from electronic devices to electric vehicles. In this study, we have developed novel nanocomposites to serve as electrodes of high-performance supercapacitors. The nanocomposites, referred to as Cu/MnX x (X = O, S, C)-rGO (rGO: reduced graphene oxide), were fabricated through direct oxidation, sulfidation, and carbonization at elevated temperatures from their metal–organic framework origin, i.e., Cu/Mn-BTC-rGO (BTC: benzene–1,3,5-tricarboxylic acid). This process is cost-effective and scalable, and can be fine-tuned to achieve a variety of nanocomposites with the desired chemistry and structural characteristics. The carbonized product, Cu/MnC x -rGO, is made up of nanoparticles of MnO and copper in close contact supported on rGO nanosheets via strong coupling. This material demonstrates excellent charge storage, rate capability, and cycling stability, i.e., high specific capacitance of 718.6 F g −1 at a current density of 1 A g −1 , with 92.6% capacitance retention after 1000 cycles. The hierarchical 3D structured Cu/MnC x -rGO nanocomposite has unique chemistry, high surface area, and high electrical conductivity, and hence ensures rapid ion and electron transport beneficial to both pseudocapacitive and double-layer capacitive performance.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xixiang Xie,Junxiang Zeng,Xianli Lan,Xiyu Liu,Jian He,Pan Wu,Yan Huang,Mengqi Chen,Meiyan Wu,Guiyin Li,Liang Shi,Yong Huang
As cholesterol is very intimately linked to the development of many types of cardiovascular diseases, clinical medicine must have a straightforward and precise method for determining total serum cholesterol (TC). Nowadays, enzymatic methods are routinely used in laboratories for the determination of TC, using cholesterol oxidase and esterase reagents for quantitative analysis on fully automated instruments. In this work, an electrochemical biosensor was developed for highly sensitive detection of cholesterol by modified modification of screen-printed carbon electrode (SPCE) and reduction of peroxidase-mimetic catalytic activity of reduced graphene oxide-hemin (RGO-hemin) nano-enzyme. The hydrolysis of cholesterol produced H 2 O 2 when it was subjected to the actions of cholesterol oxidase (CHOD), cholesterol esterase (CHER), and RGO-hemin. In the presence of H 2 O 2 , ferrocene-tyramine (Fc-Tyr) triggers catalytic deposition amplification effect on the SPCE surface, a great deal of electroactive ferrocene marker accumulates on the electrode surface, and Fc-Tyr is measured by an electrochemical workstation. The redox electrical signal detects the concentration of cholesterol in the sample. The biosensor had an operating range of 0.1∼5 mg/mL and a sensitivity of 24.43 μg/mL with acceptable specificity. The electrochemical cholesterol biosensor sensitively captured cholesterol signals in a complex body fluid environment and showed results consistent with clinical trials, with 96.63∼107.32 % recovery and 0.78∼5.28 % relative standard deviation (RSD). Therefore, there is a significant chance that the cholesterol biosensor by the institute will be used in clinical settings to detect serum cholesterol.
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高影响因子
International Journal of Electrochemical Science
·
2024
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IF 1.3
Ziming Xu,Junjie You,Zhuotong Yu,Chuanqing Du,Yourong Wang,Siqing Cheng
Tin dioxide (SnO 2 ) have been considered to be a promising anode material for high performance lithium-ion batteries (LIBs) due to its high lithium storage capacity of as high as 1494 mAh g −1 , which has been impeded greatly due to its large volumetric expansion and low conductivity. Thus, the simple but effective approach for the fabrication of SnO 2 -based material is ever-urgent. To this end, the mesoporous SnO 2 @N-rGO nanocomposites were designed and fabricated by a simple and scalable electrostatic self-assembly method and investigated electrochemically as anode for LIBs. The results show that the as-obtained mesoporous SnO 2 @N-rGO nanocomposites exhibit an excellent cycling stability and outstanding rate capability after an initial activation due to the formation of SEI layer on the surface, which are mainly ascribed to the synergistic effect of nano-SnO 2 , high conductive N-doped rGO matrix network and rich mesopores. Therefore, this work offers an ingenious strategy to design and fabricate the SnO 2 -based anode material for high performance lithium-ion batteries.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
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IF 5.8
Wenyan Huang,Jiahao Hu,Yeqi Zhu,Jiahua Zhan,Rongdan Lei,Yuchen Sun,Kaiqi Chen,Siqi Lan,Rongqian Yao
As contemporary aerospace and radar-detecting technologies evolve, load bearing-microwave absorption integration of thermal protection materials for complex environment requirements are urgent. Well known for low density, good high-temperature resistance and superior tunable dielectric properties, polymer-derived ceramics (PDCs) promisingly meet most needs of high-performance aircraft thermal protection system (TPS). Aimed at promoting practical application, we integrate in-situ formed Ni 2 Si into lightweight SiC(rGO) nanocomposite PDCs via re-pyrolyzing coassembled nano-Ni/SiC(rGO) p /polycarbosilane-vinyltriethoxysilane-graphene oxide (PVG) blends to enhance their mechanical and electromagnetic wave (EMW) absorbing performances. Size effect on phase transition of Ni into Ni 2 Si (as brazing bonding agents) accompanied by volumetric expansion, ingeniously eliminates stretching stress from PVG precursor inward shrinkage for compact framework during re-pyrolysis. In-situ generated Ni/Ni 2 Si/C core-shell nanostructure (similar to nodular cast iron) has good chemical compatibility with β-SiC/SiO x C y /C free (rGO), thereby enables composites improved compactness and toughness. More interestingly, heterogeneous interfaces/defects among Ni, Ni 2 Si, carbon shell, β-SiC and SiO x C y /C free (rGO) matrix, effectively facilitate interfacial/dipole polarization for robust EMW absorption, and lightweight SiC(rGO, Ni 2 Si) Ni=4% nanocomposite PDCs exhibit outstanding fracture toughness of 6.56 MPa·m 1/2 and high compressive strength of 119.25 MPa. Such composite with structure-function integration maintain stable under butane blowtorch at ∼1300 °C, shedding light on a new route to mass-manufacture aerospace vehicle components.
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ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Zhen Qin,Ziwen Wang,Dan Li,Yuhuan Lv,Biao Zhao,Kai Pan
The assembly of two-dimensional (2D) nanomaterials into a three-dimensional (3D) aerogel can effectively prevent the problem of restacking. Here, nanofiber-reinforced MXene/reduced graphene oxide (rGO) conductive aerogel is prepared via the hydrothermal reduction of GO using pyrrole and in situ composite with MXene. Combined with low-content 2D conductive nanosheets (MXene and rGO) as “brick”, conductive polypyrrole as “mortar”, and one-dimensional (1D) nanofiber as “rebar”, a strong interfacial cross-linking of MXene and rGO nanosheets is realized through covalent and noncovalent bonds to synergistically improve its mechanical performance. Based on the prepared MXene/rGO aerogel, a high-performance piezoresistive sensor with a sensitivity of up to 20.80 kPa–1 in a wide pressure range of 15.6 kPa is obtained, and it can withstand more than 5000 cyclic compressions. Besides, the sensor shows a stable output and can be applied to monitor various human motion signals. In addition, an all-solid-state supercapacitor electrode is also fabricated, which shows a high area-specific capacitance of up to 274 mF/cm2 at a current density of 1 mA/cm2.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yutai Wang,Qunyi Wang,Xiaoyan Zhou,Puguang Ji,Gongkai Wang,Chengwei Zhang,Mengxiao Sun,Mirtemir Shodievich
Because of the unique ability to combine high energy density with high power density, lithium-ion hybrid capacitors (LICs) have generated significant interest. Among the various anodes being explored for LICs, silicon (Si) stands out as a particularly promising anode material due to its high theoretical capacity. Nevertheless, the formidable challenge lies in the rapid capacity fade resulting from substantial volume expansion. Herein, a simple and efficient spray drying technique was used to fabricate a Si@rGO@NC composite with micro-nano structure. In this composite, Si nanoparticles are encapsulated between reduced graphene oxides (rGO) hollow spheres and a layer of carbon is coated on the surface of both the Si and the micron-sized composite particles, forming a rigid and mechanically stable structure. The composite combines the high activity of nano-Si with the industrially easy handling of micron-scale particles. Moreover, the rGO hollow spheres not only enhance the electrical conductivity but also buffer the volume expansion of the electrode and provide channels for the rapid transport of electrolyte/ions. Thanks to its advantageous structural features, the constructed LICs with activated carbon as cathode can achieve a Max. energy/power density of 253.1 Wh kg −1 /10,824.1 W kg −1 and maintain 84.3 % of its initial capacitance after 8000 cycles. The micro-nano structured design concept of Si-based materials developed in our work could offer new insights and directions for the future development of Si-based energy storage devices.
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 6
·1-10
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IF 5.3
Zhong Yujun,Li Zhiyang,Zhang Anlin,Peng Yuqing,Zhou Hao,Wang Bin,Xie Lianwu,Guo Yaping
A novel electrochemical sensor, MIP/Cu-MOF/rGO/AuNPs/GCE, was developed by depositing gold nanoparticles, coating Cu-MOF/GO on the surface of glassy carbon electrode (GCE) before electroreducing graphene oxide (GO) to rGO and covering molecularly imprinted membrane by electropolymerization for highly sensitive detection of electroneutral organophosphorus pesticide residues in agricultural product. Cyclic voltammetry, differential pulse voltametry, scanning electron microscopy, energy-dispersive spectroscopy, and atomic force microscopy were used to characterize the imprinted sensor. Several key factors such as chitosan concentration, suspension volume, pH of polymerization solution, and polymerization scanning rate during preparation of the imprinted sensor were optimized in detail. When electroneutral phosmet was used as a template, the linear range of MIP/Cu-MOF/rGO/AuNPs/GCE for detecting phosmet was 1.00 × 10 −14 –5.00 × 10 −7 mol/L with the limit of detection of 7.20 × 10 −15 mol/L at working potentials of − 0.2 to 0.6 V. The selectivity, reproducibility, and repeatability of MIP/Cu-MOF/rGO/AuNPs/GCE were all acceptable. The recoveries of this method for determining phosmet in real samples ranged from 94.2 to 106.5%. The MIP/Cu-MOF/rGO/AuNPs/GCE sensor could be applied to detect electroneutral pesticide residues in organisms and agricultural products. Graphical Abstract
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 11
·1-17
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IF 5.3
Liang Jintao,Liang Jianlu,Xiao Xinkai,Guo Fei,Zhan Yulian,Zhou Xueqing,Zhou Zhide,Li Guiyin
A sandwich-type electrochemical aptasensor for ultrasensitive detection of glypican-3 (GPC3) was constructed using GPC3 aptamer (GPC3 Apt ) labelled reduced graphene oxide-cerium oxide-gold nanoparticles (RGO-CeO 2 -Au NPs) as the signal probe and the same GPC3 Apt as the capture probe. The electrochemical redox properties of CeO 2 (Ce 3+ /Ce 4+ ) in the RGO-CeO 2 -Au NPs indicate the electrochemical signals. When the target GPC3 was present, an “aptamer-protein-aptamer” sandwich structure was formed on the sensing interface due to the specific binding between the protein and aptamers, resulting in an increased electrochemical redox signal detected by differential pulse voltammetry (DPV) technique. Under optimal conditions, the established aptasensor exhibited a logarithmic linear relationship between the current response and GPC3 concentration in the range 0.001–100.0 ng/mL, with a minimum detection limit of 0.74 pg/mL. Using the spike-recovery tests for measurement of the human serum samples, the recovery was from 99.26 to 114.01%, and the RSD range was 3.04 to 5.34%. Furthermore, the sandwich-type electrochemical aptasensor exhibited excellent performance characteristics such as good stability, high specificity, and high sensitivity, demonstrating effective detection of GPC3 in human serum samples and can be used as a clinical detection tool for GPC3. Graphical Abstract
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yiting Lei,Bingjie Pan,Gaiping Li,Lina Zou,Qi Shen
Residues of oxytetracycline (OTC) may cause the resistance of bacteria, and even have serious impacts on the ecosystem through the food chain. It was important to monitor OTC of low concentration for preserving human health and environmental safety. In this work, reduced graphene oxide doped ZnIn 2 S 4 (ZnIn 2 S 4 /rGO) nanocomposites were composited by straightforward one-step solvothermal reaction. The nanocomposites had superior light absorption property and stable photocurrent response. Because rGO not only had a large specific surface area for immobilizing abundant ZnIn 2 S 4 , but also accelerated charge transfer as an electron mediator. Additionally, the oxidation potential of OTC was more negative than the valence band potential of ZnIn 2 S 4 . So, OTC can be oxidized by photogenerated holes of the ZnIn 2 S 4 as electron donors, leading significant increase of photocurrent response. Based on this, a “signal-on” photoelectrochemical (PEC) sensor was constructed to achieve ultra-sensitive and specific detection of OTC. This sensor exhibited a wide detection range from 100 fM to 50 nM, an extremely low detection limit (61.2 fM) and excellent analytical performance in actual water, food and biological samples.
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Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-17
·
IF 36.3
Li Mengxiao,Li Rui,Ma Huige,Yang Mingsheng,Dai Yujie,Yu HaiPing,Hao Yuxin,Wang Zhihui,Wang Bei,Hu Mingjun,Yang Jun
An integrated conjugated microporous polymer composite electrode (C 4 N/rGO) with high conductivity, large specific surface area and good solvent resistance was prepared by in-situ growth.
An antifreeze alkaline electrolyte (0.1 DMSO/2 M NaOH) was developed to broaden the operation temperature zone and voltage window of the aqueous alkaline battery.
The prepared aqueous alkaline battery exhibits a high energy density (147.3 Wh Kg −1 at 25 °C), outstanding long cycling stability and excellent wide-temperature-range performance (−70 to 45 °C).
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xiaohong Tan,Wenzhan Li,Wei He,Tingting Yu,Bingbing Wan,Yong Huang,Jintao Liang,Guiyin Li
Glypican-3 (GPC3), which is a surface heparan sulfate proteoglycan, has been widely known the ideal biomarker for diagnosis and treatment of hepatocellular carcinoma (HCC). Accurate and sensitive detection of serum GPC3 level is an important and challenging task. In this paper, a sandwich electrochemical aptasensor was designed to specifically detect serum GPC3 level through aptamer-target-aptamer recognition. A GPC3 aptamer (GPC3 Apt ) immobilized on the surface of gold nanoparticles@reduced graphene oxide modified screen-printed electrode (Au NPs@rGO/SPCE) was used as the capture probe. Hemin-reduced graphene oxide-carboxymethyl chitosan@platinum nanoparticles (H-rGO-CMC@Pt NPs), with good mimicking peroxidases activity, were labeled with amination GPC3 aptamer, which was employed as the signal probe. Once the target GPC3 was anchored on the surface of GPC3 Apt /Au NPs@rGO/SPCE, the H-rGO-CMC@Pt NPs-GPC3 Apt was further specifically bound to the GPC3, forming the aptamer-target-aptamer sandwich structure, which can catalyze the oxidation of hydroquinone (HQ) to benzoquinone (BQ) and lead the oxidation current of HQ recorded by DPV to changing. The linear relationship between the current signal of oxidation of HQ and GPC3 concentration range of 0.0001–3.0 µg/mL and 3.0–60.0 µg/mL, with a low detection limit (LOD) of 0.0685 ng/mL. Additionally, the electrochemical aptasensor was successfully applied for the detection of GPC3 in human serum samples with the recovery of 99.95–104.06 % and relative standard deviation (RSD) of 1.31–5.22 %. Thus, the sandwich aptasensor could provide a new strategy for detection of serum GPC3 level and improve the early diagnosis rate of HCC.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Haoxia Guo,Zhenming Chu,Luming Fu,Yongming Lv,Xiaoman Liu,Xiaoxing Fan,Wei Zhang
Flexible strain sensors have garnered considerable attention in the domains of health monitoring, human–machine interaction, and electronic skin due to their exceptional stretchability, flexibility, skin conformability, and superior sensing capabilities. Despite recent advances, developing high-performance strain sensors that combine high sensitivity, a wide strain range, and robust stability remains a significant challenge. To overcome this, we have innovatively developed a polydimethylsiloxane (PDMS)/MXene/reduced graphene oxide (rGO) strain sensor using a tilt-filtration method and a pre-stretching technique. This sensor features a novel gradient micro-wrinkle structure, induced by variations in thickness, which enhances its strain sensing capabilities and imparts superhydrophobic properties. The synergistic interaction between the materials and the microstructure enables the sensor to achieve a high sensitivity (gauge factor (GF) peaking at 136,124.40), a wide strain range (up to 300%), and excellent stability (up to 10,500 cycles at 10% strain). Capable of detecting a wide array of human body movements, from large-scale motions to subtle stimuli, this strain sensor also boasts a rough surface texture and low surface energy, conferring superhydrophobicity and corrosion resistance . These features make it suitable for use in harsh environments. The gradient micro-wrinkle strain sensors hold promising potential for practical applications in health monitoring, electronic skin, and human–machine interaction.
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