Frontiers of Materials Science
·
2022
·Vol. 16
·期 4
·1-13
·
IF 2.612
Chen Fenglan,Liu Xin,Wang Zhengya,Tie Shengnian,Wang Chang-An
As a kind of essential hydrated salt phase change energy storage materials, mirabilite with high energy storage density and mild phase-transition temperature has excellent application potential in the problems of solar time and space mismatch. However, there are some disadvantages such as supercooling, substantial phase stratification and leakage problem, limiting its further applications. In this work, for the preparation of shaped mirabilite phase change materials (MPCMs), graphene (GO), sodium carboxymethyl cellulose (CMC), and carbon nanofibers (CNFs) were used as starting materials to prepare lightweight CMC/rGO/CNFs carbon aerogel (CGCA) as support with stable shape, high specific surface area, and well-arranged hierarchically porous structure. The results show that CGCA has regular layered plentiful pores and stable foam structure, and the pore and sheet interspersed structure in CGCA stabilizes PCMs via capillary force and surface tension. The hydrophilic aerogels supported MPCMs decrease mirabilite leaking and reduce supercooling to around 0.7–1 °C. The latent heats of melting and crystallization of CGCA-supported mirabilite phase change materials (CGCA-PCMs) are 157.1 and 114.8 J·g −1 , respectively. Furthermore, after 1500 solid—liquid cycles, there is no leakage, and the retention rate of crystallization latent heat is 45.32%, exhibiting remarkable thermal cycling stability.
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Nanoscale
·
2018
·Vol. 10
·期 45
·21284-21291
·
IF 7.233
Jiguo Tu,Haiping Lei,Mingyong Wang,Zhijing Yu,Shuqiang Jiao
The electrochemical behaviors of the ultrashort nickel phosphite nanorods supported on reduced graphene oxide (Ni11(HPO3)8(OH)6/rGO nanorods), as a candidate for cathodic applications in aluminum-ion batteries, are firstly investigated. Ni11(HPO3)8(OH)6/rGO nanorods are synthesized by a facile solvothermal process. Ni11(HPO3)8(OH)6 and Ni11(HPO3)8(OH)6/rGO cathodes both possess very high initial discharge capacities of 132.4 and 182.0 mA h g−1 at a current density of 200 mA g−1, respectively. In addition, the long-term cycling stability of the Ni11(HPO3)8(OH)6/rGO cathode is further evaluated, exhibiting a discharge capacity of 49.2 mA h g−1 even over 1500 cycles. More importantly, the redox reaction mechanism of the Ni11(HPO3)8(OH)6 cathode for aluminum-ion batteries revealed that Ni11(HPO3)8(OH)6 is partially substituted with Al3+ to form AlmNin(HPO3)8(OH)6 and metallic Ni in the nanorod-like Ni11(HPO3)8(OH)6 cathodes during the discharge process. These findings are of great significance for the further development of novel materials for aluminum-ion batteries.
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Chemical Engineering Journal Advances
·
2021
·
IF 0
Chao Liu,Cao Fang,Changsheng Shao,Xinxin Zheng,Hangbo Xu,Qing Huang
Currently, there is a huge demand for medical biomaterials aimed to improve antibacterial effect and promote wound healing. In this work, a facile and single-step approach of synthesizing silver nanoparticles (AgNPs) and reduced graphene oxide (rGO) composite material (namely, AgNPs@rGO) using high-voltage direct-current (DC) non-thermal plasma was proposed. Electron-beam (e-beam) from the DC-plasma discharge zone was implanted into the solution of AgNO 3 and graphene oxide (GO), leading to the reduction of both GO and silver ions. As a result, AgNPs were formed and distributed homogeneously on the reduced graphene sheets. This composite material exhibits excellent antibacterial performance, being able to kill both Gram-positive bacteria Staphylococcus aureus ( S. aureus ) and Gram-negative bacteria Escherichia coli ( E. coli ) effectively. Furthermore, this composite material was utilized to prepare wound-healing band-aids. The in vitro assay on mice confirmed the satisfactory curing effect. The cytotoxicity for bio-compatibility and the mechanism for sterilization were also examined and clarified. As such, this work puts forward a facile and new route of preparing antibacterial biomaterial and demonstrates its promising prospect in wound-healing application.
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ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Zhenxin Zhao,Rajesh Pathak,Xiaomin Wang,Zhewei Yang,Huijun Li,Qiquan Qiao
The sluggish redox kinetics and shuttling effect result in low sulfur utilization, large polarization and rapid capacity decay of lithium-sulfur batteries. Here, we develop iron phosphide nanoparticles/reduced graphene oxide composites (FeP/rGO) as sulfiphilic host materials, which not only immobilize the polysulfides but also facilitate the fast charge transport kinetics, contributing to the reduced polarization and effective adsorption–diffusion–conversion interface of polysulfides . Moreover, the superficial oxidation of FeP nanoparticles helps to enhance the catalytic effect, facilitating a higher coulombic efficiency. As a consequence, the optimized S@FeP/rGO exhibits a high initial capacity of 1467 mAh g −1 at 0.1 C with a sulfur utilization of 87.7% and stable cycling stability with a capacity retention of 646 mAh g −1 at 1 C after 500 cycles. Even with a high sulfur loading of 6.1 mg cm −2 , the cell can still deliver an initial capacity of 835 mAh g −1 at 0.2 C. In addition, the modified separator using FeP/rGO composites also exhibits excellent electrochemical performance . The current work provides a proof-of-concept study and practical application of S@FeP/rGO positive electrode in the lithium-sulfur batteries.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Huai Wang,Zhenyu Yuan,Jingfeng Li,Renze Zhang,Fanli Meng
Xylene is not only a carcinogenic gas, but also one of indoor pollution gases. Therefore, it is indispensable to develop a xylene gas sensor with fast response and high sensitivity. In this paper, 5 wt%rGO-Fe 2 (MoO 4 ) 3 -1 wt%Pt gas sensitive material was prepared by integrating the excellent properties of reduced graphene oxide (rGO) and noble metal Pt. In addition, the microstructure, elemental composition, phase and crystal structure of 5 wt%rGO-Fe 2 (MoO 4 ) 3 -1 wt%Pt nanocomposites were characterized. The nanostructure of Pt-modified Fe 2 (MoO 4 ) 3 nano-hollow spheres compounded on rGO was successfully prepared. The gas sensitive experiment results showed that 5 wt%rGO-Fe 2 (MoO 4 ) 3 -1 wt%Pt had better gas sensitive performance than Fe 2 (MoO 4 ) 3 (FMO), FMO-1 wt%Pt and 5 wt%rGO-FMO. At the optimum working temperature (175℃), the 5 wt%rGO-FMO-1 wt%Pt sensor had a maximum response value to xylene, and could detect 500 ppb xylene. In addition, the 5 wt%rGO-FMO-1 wt%Pt nanocomposite showed a rapid response and recovery process to xylene. Moreover, the gas sensitivity mechanism and enhancement of gas sensitivity of 5 wt%rGO-FMO-1 wt%Pt to xylene were systematically analyzed. The 5 wt%rGO-FMO-1 wt%Pt gas sensor prepared provided a new reference for the detection of xylene.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Siqi Lan,Zhenguo Huang,Wenyan Huang,Yeqi Zhu,Jiahua Zhan,Shengjian Mao,Zhichao Xue,Rongqian Yao
Demand for SiC-based polymer-derived ceramics (PDCs) employed as hypersonic vehicle components with light weight, high strength, excellent high-temperature/ablation resistance is increasingly urgent. Herein, bulk SiC(Hf, rGO) nanocomposite PDCs were fabricated via re-pyrolyzing ball-milling blends of unique SiC(Hf, rGO) p /polyhafniumcarbosilane-vinyltriethoxysilane-graphene oxide (PHVG). Highly cross-linked PHVG can effectively optimize compact formability and improve ceramic yield. In-situ formed HfO 2 embedded in ceramic network toughens microstructure, while interfacial HfOSi increases structure disorder to improve high-temperature properties. As demonstrated, SiC(Hf, rGO) modified by 3 wt.% Hf and re-pyrolyzed at 1300 °C possess good mechanical performances including hardness (5.83 GPa), fracture toughness (4.29 MPa·m 1/2 ), compressive strength (181.83 MPa) and flexural strength (46.55 MPa). More interestingly, self-healing HfO 2 (HfSiO 4 )/SiO 2 protective layer emerging during 20 min surface ablation test at 1300 °C, timely covers defects and avoids destructive structure, thus retains stable structure and mechanical properties of specimens. Such nanocomposites can promote uses in thermal protection systems (TPS) for hypersonic vehicles against extreme high-temperature environments.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Fuling Li,Changgeng Li,Quan Xie,Xuelong Chen,Xiu-Zhi Tang,Tong Guo
Elegant material construction to realize high-efficiency microwave absorption with low filler loading is in strong demand yet remains challenging. Here we combine a self-assembly method followed by pyrolysis to fabricate core-shell Co 9 S 8 @MoS 2 nanocubes, which were uniformly anchored on reduced graphene oxide nanosheets (A-G/Co 9 S 8 @MoS 2 ) to form hierarchical heterostructures . The heterostructure was deliberately designated via chemical etching of in situ formed Co 9 S 8 derived from ZIF-67 and decoration of flower-like MoS 2 nanosheets. Owing to its synergic effect in compositions and well-designed heterostructure, the product A-G/Co 9 S 8 @MoS 2 exhibits excellent microwave absorption performance with low loading content. A minimum reflection loss of − 55.13 dB and effective absorption bandwidth of 6.61 GHz with filler loading of only 8 wt% was achieved, contributed by the good impedance matching and dual loss mechanism. This work provides a new pathway for designing low-filler loading high-performance microwave absorption materials.
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Current Analytical Chemistry
·
2020
·Vol. 16
·期 8
·1063-1070
·
IF 1.365
Zhang Lin,Si Xiaojing,Yan Xiaoxia,He Haibo,Deng Dongmei,Luo Liqiang
Background: Paracetamol is a common antipyretic and analgesic drug, but its excessive intake can accumulate toxic metabolites and cause kidney and liver damage, so it is critical to determine the content of paracetamol for clinical diagnosis and dose use. Methods: Au-reduced graphene
oxide (Au-rGO) nanocomposite decorated with poly(L-cysteine) on carbon paste electrode was fabricated for the determination of paracetamol. Au-rGO was first coelectrodeposited on the carbon paste electrode surface. Afterwards, L-cysteine was electropolymerized to fabricate the Au-rGO/poly(L-cysteine)
modified carbon paste electrode. Scanning electron microscope was used to characterize the morphology of Au-rGO and poly(L-cysteine)/Au-rGO. The electrochemical properties of the sensor were studied by cyclic voltammetry and differential pulse voltammetry. Results: After exploring the
optimal conditions, the sensor showed a wide linear response for paracetamol detection in the range of 1-200 μM with a detection limit of 0.5 μM (S/N = 3). Conclusion: The fabricated sensor demonstrated good sensitivity with rapid detection capacity in real samples.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wenyan Huang,Zhichao Xue,Lingjie Li,Shengjian Mao,Yufeng Wang,Yeqi Zhu,Tao Luo,Qianwen Tao,Rongqian Yao
Strengthening interface bonding for superior mechanical/ablation performances of SiC-based aerospace vehicle components remains a major challenge. Attractively, polycarbosilane-vinyltriethoxysilane-graphene oxide with addition of TiN/B (PVG(TiN, B)) were successfully synthesized for the first time. An ingenious route via re-pyrolyzing ball-milling-induced SiC(rGO, TiB 2 ) p fillers/PVG(TiN, B) precursors blends was introduced to prepare lightweight SiC(rGO, TiB 2 ) composite polymer-derived ceramics (PDCs). Interestingly, both SiC(rGO, TiB 2 ) p and PVG(TiN, B) pyrolysis products, composed of β-SiC/SiO x C y /C free (rGO, TiB 2 ), are tightly coupled by each other owing to plentiful Si-dangling bonds. In-situ formed intergranular TiB 2 /B 4 C, well compatible with amorphous ceramic network, can prevent β-SiC grain growth, strengthen interface bonding, and even hinder further crack propagation along the grain boundaries. Particularly, samples re-pyrolyzed at 1300 °C possess unique combination of good hardness (5.44 GPa), excellent fracture toughness (4.70 MPa·m 1/2 ), high flexural strength (41.90 MPa) and outstanding compressive strength (126.33 MPa). Improved high-temperature and ablation resistance gives them distinct advantages of interlocked microstructure under exposure of butane flame. As demonstrated, SiC(rGO, TiB 2 ) composite PDCs were developed into porous ceramics with good thermal insulation , focusing on manufacturing large-size bulk PDCs for thermal protection system of hypersonic vehicles.
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BIOELECTROCHEMISTRY
·
2025
·
IF 4.5
Zhide Zhou,Haimei Li,Xiaohua Deng,Yuxuan Shi,Jiahang Huang,Yu Zhou,Xiaohong Tan,Jintao Liang,Guiyin Li
Cardiovascular disease (CVD) is the leading cause of death worldwide, particularly in the developing countries. Low-density lipoprotein (LDL), a critical biomarker for the early detection and intervention of CVD, provides valuable diagnostic and prognostic information for CVD. Herein, we developed a dual-signal electrochemical aptasensor for LDL detection based on a peroxidase-like nanozyme composed of reduced graphene oxide@molybdenum disulfide-ferrocenecarboxylic acid (rGO@MoS 2 -Fc). In the process of electrochemical testing, rGO@MoS 2 -Fc achieved the synergistic amplification of electrochemical signals both an enhanced Fc oxidation current detected by differential pulse voltammetry (DPV), and an increased hydrogen peroxide (H 2 O 2 ) decomposition current via amperometric current-time (i-t) analysis. The DPV signal, corresponding to Fc oxidation, exhibited a logarithmic linear response over a broad LDL concentration ranged from 0.001 to 100.0 μg/mL, with a limit of detection (LOD) as low as 0.91 ng/mL. Meanwhile, the i-t signal, arising from H 2 O 2 decomposition, displayed a linear range of 1.0 to 80.0 μg/mL and an LOD of 0.80 μg/mL. This dual-signal strategy exhibited good selectivity, reproducibility, stability and self-calibration capability. Analysis of human serum samples showed that the proposed strategy is expected to be a powerful method for early-stage CVD diagnosis and clinical management.
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PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Susu Chen,Mengjun Li,Liyang Lin,Zhen Wei,Ning Hu
Silicon's potential as a lithium-ion battery anode material is greatly constrained by its pronounced volume changes during cycling and inherently poor electrical conductivity. Although strategies like nanosizing silicon particles and applying carbon coatings offer partial improvements, fundamental issues including particle agglomeration and structural degradation during operation remain unresolved. In this study, leveraging the synergistic interplay between gelatin (GE) and sodium alginate (SA), we engineered a nitrogen-doped Si@rGO@GS via a seamlessly integrated route of liquid-phase synthesis, electrostatic self-assembly, freeze-drying, and thermal annealing. Silicon nanoparticles (Si NPs) were uniformly embedded within a hierarchically porous, three-dimensional nitrogen-doped carbon framework. The Si@rGO@GS composite electrode demonstrated superior electrochemical performance: achieving a maximum specific capacity of 1851 mAh g −1 at 0.1 A g −1 and maintaining 423 mAh g −1 even at a high current density of 2 A g −1 . Additionally, after 100 cycles at 1 A g −1 , the composite retained a reversible capacity of 548 mAh g −1 with an impressive capacity retention rate of 78.8 %. The cooperative interaction between rGO and biomass-derived carbon suppressed particle agglomeration and stabilized the carbon‑silicon interface, positioning the composite as a highly promising anode for lithium-ion batteries.
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Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 27
·22047-22056
·
IF 9.5
Rui Jiang,Jiarui Lin,Xiaoyan Shi,Botao Zheng,Qiaofeng Huang,Junling Xu,Lianyi Shao,Zhipeng Sun,Qingqing Zhang,Lifeng Hang
Aqueous zinc-ion batteries (AZIBs) are advantageous for grid-scale energy storage applications due to their high safety, cost-effectiveness, and environmental sustainability. However, developing high-rate and long-life cathodes for AZIBs remains a significant problem. Herein, a composite (Na3V2O1.6(PO4)2F1.4@rGO&MWCNTs) that integrates Na3V2O1.6(PO4)2F1.4 nanoparticles within a 3D conductive matrix comprising 2D reduced graphene oxide (rGO) and 1D multi-walled carbon nanotubes (MWCNTs) has been prepared through a microwave-assisted hydrothermal method followed by calcination, enhancing surface electronic conductivity to improve electrochemical performance. The Na3V2O1.6(PO4)2F1.4@rGO&MWCNTs cathode exhibits a high capacity of 98.4 mAh g−1 at 0.2 A g−1 and maintains a capacity of 52.8 mAh g−1 over 6000 cycles at 5 A g−1. The soft-pack battery demonstrates excellent cycling stability, maintaining stable performance over 1000 cycles at a high current density. Remarkably, it exhibits robust mechanical stability, delivering a stable output voltage even under various mechanical stress conditions. The outstanding performance arises from enhanced conductivity, high pseudocapacitive contribution, improved Zn2+ diffusion coefficients, low charge transfer resistance, robust structural framework, and reversible Zn2+ insertion/extraction mechanism verified by in situ electrochemical impedance spectroscopy, distribution of relaxation times, cyclic voltammetry, galvanostatic intermittent titration technique, ex situ X-ray diffraction, and ex situ X-ray photoelectron spectroscopy.
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