ACS Applied Energy Materials
·
2023
·
IF 6.4
Qinqin Zhou,Guanlin Lv,Xinyu Wang,Weili Teng,Peng Hu,Yucheng Du,Hongyi Li,Yuxiang Hu,Wenxin Liu,Jinshu Wang
Improving the specific capacitance and energy density of a fiber-shaped supercapacitor (FSSC) is critical to its applications as an energy storage device for advanced smart wearable electronics. In this paper, a heterogeneous poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/reduced graphene oxide/molybdenum disulfide (PEDOT:PSS/rGO/MoS2) fiber was prepared to achieve a high-performance and durable electrode for the FSSC. As indicated, pseudocapacitive MoS2 was in situ grown on a highly conductive acid-treated PEDOT:PSS/rGO assembly with a hierarchical structure. This structural design emphasizes the wrinkled morphology and high conductivity of the PEDOT:PSS/rGO backbone to maximize the MoS2 deposition and accelerate its electron transfer, which fully utilizes the pseudocapacitance of MoS2 and provides additional capacitance contribution to the obtained device. Attributed to the synergy, the prepared fiber electrode in the FSSC exhibits high volumetric/areal specific capacitance (325.8 F cm–3/405.3 mF cm–2 at 1 A cm–3 or 1.2 mA cm–2) and excellent rate performance (82%, 1–10 A cm–3). The corresponding device shows an ultrahigh volumetric energy density of 6.9 mW h cm–3 at a high power density of 173.6 mW cm–3 and an areal energy density of 8.5 μW h cm–2 at 215.9 μW cm–2, together with excellent cycle stability and mechanical flexibility, outperforming most of the previously reported FSSCs. Accordingly, the proposed strategy provides a great opportunity to develop a high-performance FSSC for further wearable electronics.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Zhengang Wei,Zelin Xie,Yige An,Gang Wu,Duyu Zheng,Juxing zha,Bin Xiao,Jiqiu Qi,Fuxiang Wei,Qingkun Meng,Yanwei Sui,Xiaolan Xue,Danyang Zhao,Yongzhi Li,Qing Yin
CoSb particles have an extremely high specific capacity as anodes for Li-ion batteries, but the severe expansion during the reaction process makes their cycle stability very poor. In this study, a 3D CoSb/P-CNFs@rGO network structure has been successfully constructed by a simple electrospinning technique and hydrothermal treatment . 1D carbon nanofibers and 2D reduced graphene oxide network are intertwined and coated to create this 3D structure. In this ingenious strategy, CoSb particles are embedded in carbon nanofibers to restrain volume expansion. By encapsulating the nanoparticles in a graphene structural network, it is possible to stabilize the matrix structure and precipitate CoSb particles for secondary capture. In addition, the 3D network structure also builds a fast channel for 3D interaction electron/ion transfer. Benefiting from the above structural advantages, the CoSb/P-CNFs@rGO flexible self-supporting anode exhibits excellent electrochemical performance, including ultra-long cycling performance (870 mA h g −1 after 2000 cycles at a current density of 500 mA g −1 ). More importantly, the 3D structure design method may provide a simple and effective strategy to overcome the volume expansion of anode materials .
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高影响因子
CARBON
·
2023
·
IF 10.9
Junyu Lu,Haoruo Zhang,Mushan Yuan,Xiaochuang Di,Long Ni,Yinfu Luo,Yang Chen,Huawei Zou
The application of microwave absorption (MA) materials in realistic aerospace scenarios would be difficult without a reliable mechanical carrier. However, achieving broad effective absorption bandwidth (EAB) of the aramid honeycomb at low weight gain is still a significant challenge. Herein, we achieved rapid in-situ flowering of RGO with 3D distribution in honeycomb holes by optimizing the hydrophilic thermal (HDT) N 2 H 4 ·H 2 O reduction process, making full use of the internal space of the honeycomb. The synergy of super-broadband MA and ultra-light in aramid honeycomb can be achieved by filling the 3D macro-dispersed flower-like RGO without other media. In the frequencies of 2–18 GHz, the minimum reflection loss (RL min ) of −48.38 dB was obtained in a 3% (w/w) RGO-filled honeycomb at 14.80 GHz, with a thickness of 5.2 mm. Moreover, the 3% (w/w) RGO-filled honeycomb composites achieve a broad EAB of 13.84 GHz at the thickness of 9.0 mm with only 3% increase in weight. Actual and simulated MA performance verifies the uniformity and reliability of the foamed RGO-filled honeycomb composites, where the power loss of the composites is mainly based on the conductive losses and multiple polarization from the macroscopic distribution of RGO. The electromagnetic parameters of the foamed RGO-filled honeycomb can precisely be controlled through the weight gain of GO impregnation. Compared to ordinary impregnated coatings with high weight gain, this study provides a simple and effective pathway for preparation of MA honeycomb structures with weight gain less than 4%, which have a significant potential in the field of aerospace stealth.
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RSC Advances
·
2023
·Vol. 13
·期 22
·15302-15310
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IF 3.9
Deng Gu,Yuanjin Wang,Zhiman Liang,Yanting Dou,Zhenhe Xu,Jiqi Zheng,Yaguang Sun,Fu Ding,Yu Gao
The construction of a heterojunction and the introduction of a cocatalyst can both promote the transfer of photogenerated electrons, which are effective strategies to enhance photocatalytic efficiency. In this paper, a ternary RGO/g-C3N4/LaCO3OH composite was synthesized by constructing a g-C3N4/LaCO3OH heterojunction and introducing a non-noble metal cocatalyst RGO through hydrothermal reactions. TEM, XRD, XPS, UV-vis diffuse reflectance spectroscopy, photo-electrochemistry and PL tests were carried out to characterize the structures, morphologies and carrier separation efficiencies of products. Benefiting from the boosted visible light absorption capability, reduced charge transfer resistance and facilitated photogenerated carrier separation, the visible light photocatalytic activity of the ternary RGO/g-C3N4/LaCO3OH composite was effectively improved, resulting in a much increased MO (methyl orange) degradation rate of 0.0326 min−1 compared with LaCO3OH (0.0003 min−1) and g-C3N4 (0.0083 min−1). Moreover, by combining the results of the active species trapping experiment with the bandgap structure of each component, the mechanism of the MO photodegradation process was proposed.
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高影响因子
BIOELECTROCHEMISTRY
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2023
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IF 5
Wenjing Qian,Jingming Zhou,Yumei Chen,Hongliang Liu,Peiyang Ding,Yankai Liu,Chao Liang,Xifang Zhu,Ying Zhang,Enping Liu,Aiping Wang,Gaiping Zhang
Virginiamycin (VIR), a feed additive, is used to promote pig and poultry growth. However, it is hazardous to human health. This work described a label-free electrochemical immunosensor based on silver nanoparticles-reduced graphene oxide (AgNPs-rGO) nanocomposites and staphylococcal protein A (SPA) for the first time to directly detect the residual marker VIR M1. Good catalytic currents for oxygen reduction reaction were apparently obtained after the modification of nanocomposites on gold electrode. Nanocomposites were characterized using UV–Vis, X-ray diffraction (XRD) patterns, Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). SPA was targeted to immobilize VIR M1 monoclonal antibody (mAb) by binding to Fc region of antibody. The proposed immunosensor showed a wide linear range from 0.25 ng mL −1 to 100 ng mL −1 , providing detection limit (LOD) of 0.18 ng mL −1 of VIR M1. Recovery rates ranged from 92.27% to 98.84%, and relative standard deviation (RSD) was not above 6.6%, indicating the immunosensor could detect VIR M1 in actual samples with high accuracy. The sensor showed good selectivity, reproducibility and stability and could be considered as a potential tool for detection of VIR M1 in feed and animal derived food.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jinghong Pan,Chuxiao Sun,Jiajun Liu,Xishan Zhao,Chunxiao Jiao,Chengkai Wang,Qi Wang
Si-based materials are the most potential high-capacity anode material for lithium-ion batteries due to their theoretical specific capacity of 4200 mAh g −1 , significantly higher than the current commercial graphite anode (372 mAh g −1 ). However, the significant volume change (>300%) of Si-based materials during the embedding of lithium ions into Si NPs results in various issues, such as short cycle life and low electrical conductivity , which significantly restricts their commercial development. This study introduces a new flower-like Si@NiO/reduced graphene oxide (rGO) ternary composite synthesized using a straightforward and low-pollution one-step synthesis technique. A distinctive composite flower-like structure is created by wrapping Si NPs in NiO nanoflowers and embedding the rGO nanosheets in the NiO "petal" structure. This structure can shorten the lithium-ion transport path, provide a superb conductive network, effectively reduce the electrode's bulk effect and improve the structural stability of the anode material. Additionally, the structure provides more capacity for the electrodes. At a current density of 1 A g −1 and after 700 cycles, the Si@NiO/rGO anode displays a discharge-specific capacity of 1081.34 mAh g −1 thanks to its one-of-a-kind flower-like structure. At various current densities, the Si@NiO/rGO anode likewise demonstrates outstanding electrochemical performance. Additionally, the volume growth of the flower-like Si@NiO/rGO anode material after 700 cycles is approximately 15.08%, substantially less than that of Si NPs. The new flower-shaped Si@NiO/ rGO ternary composite, synthesized in a simple and cost-effective way, offers not only an alternative for the preparation of Si-based electrode materials that can alleviate their drastic volume expansion but also an effort to create new renewable green energy storage devices.
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高影响因子
ANALYTICAL BIOCHEMISTRY
·
2023
·
IF 2.9
Xin-Lei Cheng,Ting-Rui Fu,Dan-Feng Zhang,Jian-Hua Xiong,Wu-Ying Yang,Juan Du
Reduced graphene oxide-gold nanoparticles nanocomposites (rGO-AuNPs) with high surface-enhanced Raman scattering (SERS) activity was created by biomass-assisted green synthesis with Lilium casa blanca petals biomass for the first time, and its application for methylene blue (MB) degradation was explored through in-situ monitoring. Lilium casa blanca petals biomass was used as a reducing agent to reduce GO and chloroauric acid successively when carrying out rGO-AuNPs in-situ synthesis while it also acted as a capping agent. The produced rGO had oxygen-containing functional groups which had an outstanding performance in enhancing the SERS effect. Characterization results confirmed that the AuNPs were grafted onto the rGO sheet, and the mechanism study showed that total flavonoids in Lilium casa blanca petals biomass were the main biological compounds involved in the reduction. rGO-AuNPs had a high Raman enhancement factor (EF) which could reach 3.88 × 10 7 . The synthesized nanocomposite also had a good catalytic activity that could be employed as catalyst in MB degradation, and it could complete degradation within 15min. The reaction rate increased linearly with the amount of rGO-AuNPs, and the degradation could be in-situ monitored both by UV and SERS.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Shaosheng Rao,Qinqin Liu,Bing Li,Yangyang Sun,Yinmao Wang,Guozhong Gao,Zhongti Sun,Juan Yang
Silver nanoparticles (Ag NPs) are used as antimicrobial agents due to their high-efficiency, broad-spectrum disinfection activity. However, the agglomeration and stability problems caused by excessive release of silver ions (Ag + ) have severely restricted their developments. Herein, a novel silver/polyethyleneimine/reduced graphene oxide (Ag/PEI/rGO) antibacterial material featuring good dispersibility and permeability was rationally designed, thus benefiting for the capture of bacteria due to the introducing of highly-cationic PEI modifier and controllable release of biocidal agents (Ag + ). Compared with Ag/rGO, the Ag/PEI/rGO has excellent stability and shows a more efficient sterilization efficacy against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) with 100% germicidal efficiency with low orders of dozens of ppm. In addition, the outstanding biocompatibility of this Ag/PEI/rGO antibacterial material endows it with promising potential in sterilization applications, which is expected to solve the infection problem caused by bacterial biofilm formation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yuhang Zhang,Jin Qian,Peifang Wang,Yuxuan He,Bianhe Lu,Sijing Tang,Kailin Xu
In this study, ternary magnetic nanocomposites (SrTiO 3 /CoFe 2 O 4 /rGO, SCG) doped with cobalt ferrite and loaded with rGO were successfully synthesized, and utilized to rapidly activate PMS to degrade LVF. After evaluating the efficacy of samples with different loading loads, SCG-1 (1 % wt rGO loading) was selected for further testing due to its optimal catalytic activity (degradation efficiency reached 87.4 % in 5 min). Quench experiments and electron paramagnetic resonance (EPR) analysis showed that SO 4 − , 1 O 2 , OH were the main active substance involved in LVF degradation. Based on the redox cycle of Co and Fe ions and the platform provided by perovskite and rGO, the reaction can be carried out quickly. The vulnerable sites and possible degradation pathways of LVF were further analyzed by density functional theory (DFT) calculation and LC-MS/MS analysis, and the developmental toxicity and ecological risk of intermediate products were determined based on toxicity assessment software (T.E.S.T). This study provided a new vision for realizing rapid antibiotic degradation in water environments and provided theoretical support for the subsequent research on novel nanomaterials.
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高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Junying Huang,Mengting Chen,Xiaojun Li,Xiaowen Zhang,Liyun Lin,Weipeng Liu,Yingju Liu
Molybdenum disulfide (MoS 2 ), although considered as a promising transition metal dichalcogenides catalyst, owns low plane conductivity that limits its effective application. In this work, we grew monodispersed MoS 2 nanoflakes on reduced graphene oxide (rGO), and then assembled the resulting MoS 2 -rGO with carbon nanotubes (CNTs) in a layer-by-layer manner to form the MoS 2 -rGO-CNTs composite. The CNTs spacing layer not only reduces the whole catalytic material's resistance by bridging different broken MoS 2 -rGO nanosheets , but also constructs a three-dimensional structure to prevent 2D MoS 2 -rGO nanosheets restacking and thus increases the active sites. Such three-dimensional MoS 2 -rGO-CNTs catalyst exhibited a low Tafel slope of 39 mV dec −1 and a high current density of 1200 mA cm −2 at −400 mV. Therefore, our study showed a cheap and simple method to combine three-dimensional hybrid material, facilitating the large-scale application of non-noble catalyst.
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TALANTA
·
2019
·
IF 4.916
Xueliang Liu,Xinhuan Wang,Qiusen Han,Cui Qi,Chen Wang,Rong Yang
In this work, we reported a novel nanozyme synthesized by decorating highly dispersed ultrafine IrO 2 nanoparticles on reduced graphene oxide (rGO) nanosheets via a simple hydrothermal method . The as-prepared IrO 2 /rGO nanocomposites exhibited intrinsic peroxidase-like activity and could catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to produce blue product in the presence of H 2 O 2 . Catalytic kinetic of IrO 2 /rGO nanocomposites followed Michaelis-Menten behavior, exhibiting a higher affinity to TMB than horseradish peroxidase (HRP) enzyme. Catalytic mechanism studies suggested that the peroxidase-like activity of IrO 2 /rGO nanocomposites originated from their ability of electron transfer between substrate and H 2 O 2 . On the basis of high peroxidase-like activity of IrO 2 /rGO nanocomposites, a colorimetric strategy for rapid and sensitive detection of low weight biothiols was developed. The colorimetric detection assays for low weight biothiols showed high selectivity against other amino acids . Therefore, the IrO 2 /rGO nanozyme is expected for promising potential applications in the biosensor, diagnostics and environment.
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高影响因子
ACS Omega
·
2018
·
IF 0
Yizhi Wang,Shuo Wang,Fan Li,Yan Wang,Huairuo Zhang,Chunwen Sun
Highly active and durable electrocatalysts are vital for commercialization of direct methanol fuel cells. In this work, a three-dimensional nanocomposite consisting of platinum nanoparticles, W18O49 nanocables, and reduced graphene oxide composite (Pt/W18O49 NCs–rGO) has been prepared as an electrocatalyst for methanol oxidation reaction (MOR). The catalyst is prepared through a two-step method. The W18O49 nanocables and the reduced graphene oxide composite are prepared by a solvothermal process. Then, Pt nanoparticles are loaded on the W18O49 nanocables and the reduced graphene oxide composite by a hydrogen reduction at ambient condition. The obtained catalyst has a special three-dimensional architecture consisting of two-dimensional nanosheets, assembled one-dimensional nanocables, and the loaded nanoparticles on their surface. The Pt/W18O49 NCs–rGO catalyst shows 1.56 time mass activities than the Pt/C, with the current density of the forward anodic peak reaching 1624 mA/mgPt at 0.854 V versus reversible hydrogen electrode potential in 0.1 M HClO4 and 0.5 M CH3OH mixed electrolyte. It also shows a strong antipoisoning property toward CO. For the durability testing, the current density of Pt/W18O49 NCs–rGO shows a 37% decay, whereas the current of Pt/C catalyst shows a 41% degradation from 600 to 3600 s at 0.7 V. The high activity toward MOR, good antipoisoning for intermediate products, and excellent stability are ascribed to strong metal–support interaction effects between the Pt nanoparticles and the W18O49 NCs.
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