JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Liang Yin,Xiangqun Chu,Huimin Chen,Bin Liu,Pinhua Zhang,Lulu Du,Guangliang Cui,Li Lv
Nitrogen dioxide (NO 2 ) is a major atmospheric pollutant that poses a significant threat to human health, the development of efficient and accurate NO 2 gas sensors is crucial for air quality monitoring. Metal-organic frameworks (MOFs) are considered ideal materials for gas sensing due to their exceptional tunability, large surface area, high porosity, and abundant active metal sites. However, the poor conductivity of MOFs limits their applications in electrochemical sensors. This study presents a ZIF-67/rGO nanocomposite synthesized by combining reduced graphene oxide (rGO) with ZIF-67 via a one-step solution method. Experimental results demonstrate that the ZIF-67/rGO nanocomposite sensor shows significant sensitivity to NO 2 gas at room temperature. At 5 ppm NO 2 , the response is approximately 13-fold higher than that of the pure rGO sensor. More importantly, the sensor achieves a detection limit as low as 0.5 ppm, with an ultra-fast response time of 15 s and recovery time of 40 s at room temperature. Additionally, the sensor exhibits excellent repeatability, long-term stability, and high selectivity for NO 2 . This study presents an effective strategy for accurate real-time detection of low concentration NO 2 gas and provides valuable insights for designing MOF-based hybrid sensors at room temperature.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yuqing Dong,Chengsen Li,Shuting Zhang,Xiangwei Meng,Meijie Yu
Prussian blue (PB) as a type of metal-organic framework has attracted widespread attention in the field of electromagnetic wave (EMW) absorption due to its adjustable composition and structure. N-doped porous carbon/rGO/Fe 4 N composite is prepared by carbonizing and nitriding PB precursor. Fe 4 N/rGO/NPC exhibits the minimum reflection loss (RL min ) is −53.09 dB at 16.16 GHz of 2.2 mm, with an effective absorption bandwidth (EAB) value of 7.84 GHz (10.16–18 GHz) at 2.6 mm. The EMW absorption mechanisms analysis displayed that excellent impedance matching and various attenuation pathways including magnetic loss, conduction loss, interfacial and dipole polarization synergistically contributed to the high EMW absorption performances. The results indicate that the Fe 4 N/rGO/NPC composite derived from PB precursor presents great potential in the field of EMW absorption.
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Weimin Zhou,Zixuan Yu,Wenkai Qu,Tianyu Qi,Kun Wang,Guihai Zhu,Rui Li,Dongying Ju,Yi Zhou,Guiying Xu Xu
Nowadays, using the cheapness catalysts to alternate the noble metal catalysts are becoming the more popular trend than ever before. Carbon materials as an industrial product are getting the more attention due to their excellent stability and conductivity. Thus, searching a method to give the carbon materials electrocatalytic performance is a hot research topic in the world. Our studies attempt to construct the defects on the carbon bones to give the carbon materials hydrogen evolution reaction (HER) performance. Concretely, the topological defects as active sites were successfully constructed on the bones of graphene, through the N-doping and N-removing on the carbon bones of graphene oxide (GO). The defects were verified by the XRD, XPS and TEM measurements. The fabricated APS/NG-1100 shows the obviously enhanced electrocatalytic performance, compared with the APS/GO-800 that is not conducted N-doping and N-removing processes. For instance, in the 1M KOH medium, the hydrogen evolution reaction (HER) overpotential of APS/NG-1100 is 332 mV with a Tafel slope of 38 mV/dec. Meanwhile, it is observed that the HER overpotential of APS/NG-1100 is 337 mV with a Tafel slope of 98 mV/dec in the 0.5 M H2SO4 medium. These results indicate that the constructing the defects on the bones of carbon materials is an effective way to expand the applications of carbon materials as catalysts in the HER field.
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DOI
高影响因子
ANALYST
·
2019
·Vol. 144
·期 23
·6968-6974
·
IF 4.019
Jianqiao Liu,Li Quan,Xuelian Yu,Lin Wang
In this work, a sandwich-type electrochemical immunosensor for the detection of procalcitonin (PCT) is constructed layer-by-layer with a novel label based on MoO3/Au@rGO nanocomposites. The high surface area and electroconductivity of graphene contributes to the transfer of electrons. Besides, the introduction of Au modulates the morphology of the MoO3@rGO nanocomposites from hexagonal prisms to agglomerated particles. Compared to rGO, Au@rGO and MoO3@rGO, the synergistic effect of MoO3/Au@rGO nanocomposites leads to the highest electrocatalytic activity towards H2O2 reduction. The electrochemical immunosensor exhibits a wide working range from 0.01 pg mL−1 to 10 ng mL−1 and a detection limit of 0.002 pg mL−1 at a signal-to-noise ratio of 3. Additionally, we also obtain excellent sensing performance for the immunosensor, including excellent selectivity, good reproducibility and stability. This work will give insight into the application of the nanocomposites based on noble metals combined with transition metal oxides in the fields of electroanalytical chemistry and biosensors.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 6
·5008-5016
·
IF 2.22
Peng Fang,Wang Shaojie,Yu Weiwei,Huang Tiantian,Sun Yan,Cheng Chuanwei,Chen Xin,Hao Jiaming,Dai Ning
Gas sensors with high performance and low energy consumption are necessary for system integration in the environment monitoring of explosives. High-performance room-temperature hydrogen sulfide (H 2 S) gas sensors were fabricated based on the hybrids of tungsten oxide (WO 3 )/reduced graphene oxide (rGO). WO 3 nanocubes modified with different contents of rGO were synthesized by acid-based hydrothermal method. The optimal amount of rGO in the composite is 5 wt%, at which the room-temperature operating sensor presents the highest sensitivity of approximately 32.7 to 500 ppb H 2 S, a fast recovery time of ~ 180 s, as well as an excellent sensing selectivity. The overall improvement in sensing performances demonstrated an important progress made in H 2 S sensor fabrication for portable and real-time gas detection. The improved gas-sensing performance is attributed to the large specific surface area of the WO 3 nanocubes, the formation of WO 3 /rGO heterojunctions, and the enhanced electron transfer efficiency.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yanchen Liu,Jiayi Huang,Xiaoqing Zhang,Junwei Wu,Andrew Baker,Huayu Zhang,Song Chang,Xinhe Zhang
SiO(silicon monoxide) anode have received widespread attention owing to the great potential for the development of modern society. Although SiO has a large Li capacity, the short cycle life, poor rate capability and low coulombic efficiency limits its wide applications. In this paper, we adopt hydrothermal mixing and sintering process to form a ball milling bm-SiO based, Ni doped and rGO recombined composite (bm-SiO/Ni/rGO) anode material , which shows excellent cycle performance with the initial columbic efficiency of 65%, the discharge capacity of 720 mAh g −1 at 100 mA g −1 current density after 100 cycles and good rate performance. The improvement of electrochemical performance can be ascribed to the interaction effects of the limited damage of volume change, the open structure of reduced graphene oxide, and the cycle stability with the Ni doping.
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Yingmeng Zhang,Luting Liu,Qingwei Deng,Wanlin Wu,Yongliang Li,Xiangzhong Ren,Peixin Zhang,Lingna Sun
Hybrid CuO-Co 3 O 4 nanosphere building blocks have been embedded between the layered nanosheets of reduced graphene oxides with a three dimensional (3D) hybrid architecture (CuO-Co 3 O 4 -RGO), which are successfully applied as enhanced anodes for lithium-ion batteries (LIBs). The CuO-Co 3 O 4 -RGO sandwiched nanostructures exhibit a reversible capacity of ~847 mA·h·g −1 after 200 cycles’ cycling at 100 mA·g −1 with a capacity retention of 79%. The CuO-Co 3 O 4 -RGO compounds show superior electrochemical properties than the comparative CuO-Co 3 O 4 , Co 3 O 4 and CuO anodes, which may be ascribed to the following reasons: the hybridizing multicomponent can probably give the complementary advantages; the mutual benefit of uniformly distributing nanospheres across the layered RGO nanosheets can avoid the agglomeration of both the RGO nanosheets and the CuO-Co 3 O 4 nanospheres; the 3D storage structure as well as the graphene wrapped composite could enhance the electrical conductivity and reduce volume expansion effect associated with the discharge-charge process.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xiangjia Liu,Jin Li
In this study, a ZnO/NiS@NiO/rGO (ZNNG) composite was characterized using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and scanning electron microscopy (SEM). Compared with simple ZnO, ZNNG exhibited stronger green emissions, but no ultraviolet (UV) emission peak was observed. Through a comprehensive analysis of ultraviolet–visible (UV–vis) absorption spectra, Mott Schottky (MS) plots, electron paramagnetic resonance (EPR) spectra, and X-ray photoelectron spectroscopy (XPS) results, it was proved that the stable green emissions of ZnO and its composites originated from the quenching of electrons between Zn interstitial ( Zn i ) and surface oxygen defects. The introduction of NiS@NiO caused the conduction band (CB) and valence band (VB) of ZnO to change to lower energy states, effectively increasing the absorption intensities of ZnO in the visible light, while introducing numerous oxygen-related defects on the surface of ZnO. Further addition of rGO effectively promoted the migration of electrons from the CB to the Fermi energy (E f ). These effects effectively increased the green emission of ZnO and reduced the UV emission. Finally, a proper mechanism for the near-zero band gap NiS@NiO/rGO that can significantly enhance the green emission of ZnO was proposed.
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DOI
高影响因子
RARE METALS
·
2021
·Vol. 40
·期 10
·2810-2818
·
IF 4.003
Xu Kun,Liang Xin,Wang Lu-Lu,Wang Yong,Yun Ju-Feng,Sun Yi,Xiang Hong-Fa
Abstract The popularity of lithium–sulfur batteries has been increasing gradually due to their ultrahigh theoretical specific capacity and energy density. Nevertheless, they also have lots of drawbacks to be overcome, such as poor conductivity, severe volume expansion, and serious “shuttle effect”. In this work, reduced graphene oxide/molybdenum dioxide (rGO/MoO 2 ) composite is synthesized and applied to modify polypropylene separator. The modified polypropylene separator introduces synergistic tri-functions of physical adsorption, chemical interaction and catalytic effects, which can inhibit the “shuttle effect” and enhance the electrochemical performances of lithium-sulfur batteries. In the prepared rGO/MoO 2 composite, the polar MoO 2 chemically adsorbs the intermediate lithium polysulfide, while the rGO with good electrical conductivity not only acts as a physical barrier to prevent diffusion of polysulfide ions, but also improves the conversion efficiency of active material intercepted on the separator. As a consequence, the battery assembled with rGO/MoO 2 modified polypropylene separator exhibits a reversible capacity of 757.5 mAh·g −1 after 200 cycles at 0.2C with a negligible capacity decay of 0.207% per cycle, which indicates a good long-period cycling stability. Furthermore, the rate performance and self-discharge suppression are also improved by introducing modified polypropylene separator. It shows that rGO/MoO 2 composite is a promising material for separator modification in lithium-sulfur batteries. Graphic abstract
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DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Fan Xie,Kun Gao,Longhai Zhuo,Fengfeng Jia,Qin Ma,Zhaoqing Lu
In this contribution, we demonstrated an efficient approach for constructing conductive aramid nanofibers based porous architectures by graphene oxide and Ti 3 C 2 T x via freeze drying and subsequent thermal reduction. Specifically, the aramid nanofibers laid the foundation for mechanical enhancement and good electrical conductivity of Ti 3 C 2 T x and RGO ensured outstanding electromagnetic shielding ability. The resultant Ti 3 C 2 T x /RGO/ANFs hybrid aerogel presented a spongy structure, which was conducive to the dissipation of incident electromagnetic waves through multiple reflection and scattering. The electromagnetic shielding efficiency reached 54.8 dB in X-band (8.2–12.4 GHz) with 25 wt% loading content of Ti 3 C 2 T x . When the addition amount of Ti 3 C 2 T x was 5 wt%, the optimum compressive stress of Ti 3 C 2 T x /RGO/ANFs hybrid aerogel reached 200 kPa under 70% strain with a relatively low density of 0.062 g/cm 3 . This work provided a feasible approach to fabricate robust hybrid aerogel with excellent electromagnetic shielding performance and compression resilience.
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DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 48
·24394-24402
·
IF 6.895
Yuhan Liu,Malin Li,Yingying Zheng,Hezhe Lin,Ziyang Wang,Wen Xin,Chunzhong Wang,Fei Du
Potassium-ion batteries (PIBs) are considered a promising alternative to lithium-ion batteries (LIBs) for next-generation energy storage due to the abundance and competitive cost of potassium resources. However, the excavation and the development of proper electrodes for PIBs are still confronted with great challenges. Herein, a self-assembled bismuth sulfide microsphere wrapped with reduced graphene oxide was fabricated to form a heterostructured Bi2S3@RGO composite via a visible-light-assisted method and served as the anode for PIBs. The as-prepared Bi2S3@RGO composite presented a high reversible specific capacity of 538 mA h g−1 at 0.2 A g−1 and superior rate capability of 237 mA h g−1 at a high current density of 2 A g−1 after 300 cycles. In particular, the high capacity could be ascribed to the synergistic effect of the conversion and alloying reactions during the electrochemical processes, which was validated by ex situ X-ray diffraction. The fabrication of a unique heterostructure combining the self-assembled Bi2S3 microspheres and flexible RGO boosted the facile charge transfer, leading to the enhanced cyclic stability and rate performance.
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DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Ibrahim Abdalla,Ahmed Elhassan,Jianyong Yu,Zhaoling Li,Bin Ding
The quick improvement of up-to-date communication technology has generated ubiquitous electromagnetic wave (EMW), which poses a significant hazard to environment and human health. One of the key challenges associated with EMW is to develop highly lightweight and efficient adsorption materials that are able to alleviate the unfavorable interferences in wide-ranging frequency. Herein, we fabricated a hybrid porous carbon nanofibers (CNFs) membrane combined with reduced graphene oxide (rGO) and magnetic nanoparticles by electrospinning process followed by calcination . The composite membrane exhibited high-efficiency absorbing abilities due to its particular porous structure and introduced components in the final sample. Specifically, both cobalt and iron nanoparticles captured into CNFs are advantageous to the electrical conductivity of the membrane by lessening the contact loss via creating the metal-metal crossing points within membrane. The introduced components are capable of enhancing the absorption performance due to the improved permittivity ( ε r ) and permeability ( μ r ) in the composite structure. The minimum reflection loss (R L min ) value was demonstrated to be −43.60 dB at 5.84 GHz with a matching thickness of 5 mm. The synthesis of nanofibrous composite in this work identifies a new direction to fabricate advanced EMW absorption materials towards broad practical applications.
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DOI
高影响因子
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