SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Minglu Zhang,Man Wang,Xiaojun Zhang,Chengwei Zhang,Manhong Li,Sujun Yu
Ionic polymer-metal composites (IPMCs) composed of Nafion film and platinum deposited on both faces have gained much attention in biomedical engineering as actuators because it can show large bending motion under an electric field. This study focuses on the design of a multilayered IPMC actuator based on sulfonated graphene oxide (SGO) modified macroporous Nafion film. The Nafion film is firstly fabricated via templating technique by using silica spheres as template and SGO as a conductive agent dispersed in Nafion film. Then, Pt nanoparticles are deposited on both faces of the as-prepared Nafion film to fabricate the actuator (denoted as IPMC-SGO-M). In the IPMC-SGO-M, macropores and SGO co-exist in the Nafion film, which can effectively enhance the rapid transport of ions and electrons. In addition, small Pt nanoparticles are uniformly dispersed on the surface of the Nafion film, which can improve the water-uptake capability and charge redistribution between two layers of electrode regions. As a result, the tip displacements of the IPMC-SGO-M are 1.7-fold and 1.9-fold higher than that of the IPMC based on macroporous Nafion film (IPMC-M) under 6.2 and 6.6 V, respectively. The blocking forces of the IPMC-SGO-M are about 2.6-fold and 2.3-fold higher than that of IPMC-M under 6.2 and 6.6 V, respectively.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2021
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IF 3.995
Ruidong Song,Taixin Liang,Yanli Guo,Chao Wang,Fei Xiao,Wei Liu,Jiangbo Zhang
The preparation of catalysts with small particle size, large specific surface area and high atomic utilization has always been the focus of research in the field of catalysis. As for energetic materials, catalysts are always used to improve the thermal decomposition performance of ammonium perchlorate (AP) as it has significant effect on the power of engine. In this work, a two-dimensional metal clusters catalyst has been successfully prepared by solvothermal and heat treatment to improve thermal decomposition performance of AP. In detail, the transition metal ions were supported on the graphene oxide (GO) surface by organic ligands linking, followed by heat treatment to obtain two-dimensional rGO based metal clusters catalyst. The morphology and structure of the catalysts at different temperatures and their effect on AP decomposition were studied, the results show that catalyst at 300 °C has a particle size of 20 nm and uniformly distributed on rGO. The catalyst promotes the high temperature decomposition of AP by 73.7 °C with improved stability, and increases the heat release from 652.73 J/g to 1392.11 J/g. This may be attributed to good conductivity of GO and the strong gain-loss electron ability of the metal clusters. The presence of GO increased the active sites for cluster catalysis, additional, the metal clusters have a positive synergistic effect with GO. Thus, the thermal decomposition performance of AP was enhanced meanwhile thermal stability can also be improved.
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高影响因子
Journal of Environmental Chemical Engineering
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2021
·
IF 5.909
Faguang Ma,Yilin Wu,Qingyan Guo,Rongxin Lin,Kaicheng Zhang
Herein, according to the polydopamine (PDA)-based imprinting and thermal-induced imprinting methods, we reported on the development and applications of double-layer-imprinted mixed matrix membranes (DI-MMMs) through a dual-imprinted strategy, thereinto, the tetracycline (TC), one of the pollution-intensive pharmaceutical and personal care products , was chosen as template molecule. As to the first-TC-imprinted layer, the blended PDA-based TC-imprinted activated carbon (AC) and SiO 2 were both used for the preparation of membrane. Next, κ-carrageenan-modified graphene oxide (GO) nanosheets would be regarded as the surface-loaded layer to support the thermal-induced imprinting synthesis (second-TC-imprinted layer). Importantly, high adsorption capacity at around at 106.44 mg/g and fast adsorption rate (within 60 min) had been successfully obtained. Importantly, permselectivity rates ( β ) of our imprinting membranes were obtained as 3.60, 3.33 and 3.51, respectively. Overall, based the practical selective separation and scalability analysis, we believed that the as-prepared DI-MMMs with high-intensitive recognizability and permeability of template molecule would provide a possibility for breaking the permeability-selectivity trade-off of molecularly imprinted membrane materials.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
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IF 4.464
Jia Cheng,Xiaoyang Yue,Caixia Chen,Xiaoping Shen,Shiping Zeng,Zhenyuan Ji,Aihua Yuan,Guoxing Zhu
Developing highly efficient, low-cost and stable electrocatalysts for oxygen evolution reaction (OER) is momentous to achieve the conversion and storage of sustainable energy. Herein, the CoFe(OH) x / GO composites with accordion-like CoFe(OH) x nanosheets clusters dispersed on graphene oxide (GO) sheets are prepared via a template-assisted route. It is found that the OER performance of the CoFe(OH) x / GO composites strongly depends on the content of GO and the mole ratio of Co/Fe. The optimized CoFe(OH) x / GO composites exhibit remarkably enhanced OER electrocatalytic activity in 1 M KOH with a low overpotential of 294 mV at 10 mA cm −2 and a small Tafel slope of 63.4 mV dec −1 , which are far superior to the corresponding Co(OH) 2 / GO and bare CoFe(OH) x . The enhanced electrocatalytic activity can be ascribed to the regulated electronic structure surrounding the active metal sites by introducing Fe, the improved conductivity by GO for faster charge transfer, and the accordion-like hierarchical structure with increased accessible active sites. This work demonstrates a comprehensive strategy to improve the electrocatalytic performance of transition metal hydroxide based OER catalysts.
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高影响因子
APPLIED CLAY SCIENCE
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2021
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IF 5.467
Qiuxiang Wang,Zongxue Yu,Yuchuan Liu,Ximei Zhu,Runxuan Long,Xuyang Li
In this project, the Titanium dioxide nanowire (TiO 2 Nw) and layered double hydroxide (LDH) were introduced into the reduced graphene oxide (RGO) to make a composite material and then were assembled on the cellulose acetate (CA) membrane into photocatalytic composite membrane (RLT) through vacuum filtration with photocatalytic effect. The photocatalytic composite membrane (RLT) with high permeability and high rejection was constructed. Compared with other ratios of RLT membranes, RLT-0.5 composite membrane had a higher water flux of 432.38 L·m −2 h −1 bar −1 , and the rejection rate of dye were above 99%. In the rejection process of 10 cycles, that the rejection rate and flux of RLT-0.5 composite membrane to methylene blue (MB), malachite green (Mg) and Congo red (CR) were more stable regardless of whether there was light or no light. Of course, the rejection effect was better under light conditions, showing its excellent photocatalytic performance. In conclusion, RLT-0.5 composite membrane had excellent water purification ability and photocatalytic efficiency, which made it have a wide application in water treatment.
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高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Shuqing Zhou,Min Jin,Rong Tan,Zhiqiang Shen,Jing Yin,Zhigang Qiu,Zhengshan Chen,Danyang Shi,Haibei Li,Zhongwei Yang,Huaran Wang,Zhixian Gao,Junwen Li,Dong Yang
The latent dangers of waterborne viral transmission have become a major public health concern. In this study, reduced graphene oxide (rGO)-Fe 3 O 4 nanoparticles were decorated with cetyltrimethylammonium bromide (CTAB) to adsorb severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike pseudovirus and three human enteric viruses (HuNoV, HRV, and HAdV). The successful combination of CTAB with rGO-Fe 3 O 4 was confirmed by transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, zeta potential, Brunner-Emmet-Teller, and vibrating sample magnetometer measurements. The adsorption of HuNoV and HAdV followed pseudo-first-order kinetics, while that of HRV conformed to the pseudo-second-order model. CTAB-functionalized rGO-Fe 3 O 4 exhibited exceptionally high adsorption of HuNoV, HRV, HAdV and SARS-CoV-2 spike pseudovirus, with maximum adsorption capacities of 3.55 × 10 7 , 7.01 × 10 7 , 2.21 × 10 7 and 6.92 × 10 6 genome copies mg −1 , respectively. Moreover, the composite could effectively adsorb the four types of virus particles from coastal, tap, and river water. In addition, concentrating the virions using CTAB functionalized rGO-Fe 3 O 4 composites before qPCR analysis significantly improved the detection limit. The results indicate that viruses are captured on the surface of CTAB functionalized rGO-Fe 3 O 4 composites through electrostatic interactions and the intrinsic adsorption ability of rGO. Overall, CTAB-functionalized rGO-Fe 3 O 4 composites are promising materials for the adsorption and detection of human enteric viruses as well as SARS-CoV-2 from complex aqueous environments.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Jian Wu,Jinlei Meng,Zhanhong Yang,Hongzhe Chen,Yao Rong,Lie Deng,Zhimin Fu
Aqueous zinc-ion batteries (AZIBs) are expected to be used for large-scale energy storage, due to their environmentally friendly, low cost, abundant global stockpile, high capacity. However, the development of high-performance cathodic materials still faces huge challenges. Herein, cuprous oxide (Cu 2 O) and Cu 2 O/reduced graphene oxide (rGO) are first reported as a cathode for AZIBs respectively. Simultaneously, the Zn//Cu 2 O/rGO battery exhibits significantly enhanced electrochemical performance with a high rate performance and an excellent cycle lifespan (139 mAh g −1 after 500 cycles at 1 A g −1 with 95.9% capacity retention), which is extremely excellent in copper-based zinc-ion battery cathode materials . Moreover, ex-situ XRD and XPS results have revealed a hybrid mechanism involving conversion reactions and classical insertion/extraction reaction. when the Zn//Cu 2 O/rGO battery discharged from the initial state to 0.2 V, part of Cu 2 O will be reduced to Cu 0 with the insertion of zinc ions ; when the Zn//Cu 2 O/rGO battery charged to 1.1 V, Cu 0 is completely oxidized to Cu 2 O with the deintercalation of zinc ions, and only Cu + is existing at this time. The results reveal the energy storage mechanism of the Cu 2 O/rGO electrode, which will provide significant help for the research on copper based cathodic materials and expect to be further explored in other ion-batteries.
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高影响因子
Materials
·
2021
·Vol. 15
·期 1
·62
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IF 3.623
Ying Liu,Gengyuan Gao,Dan Jiang,Zhongwei Yin
This paper studied a hybrid polytetrafluoroethylene (PTFE)/Nomex fabric composite with lower friction coefficient (COF) and high underwater wear resistance. A pin-on-disk tribometer was used to test tribological properties under different applied loads and rotation speeds. The wear surface, transfer film and cross-section were analyzed by scanning electron microscope (SEM) and optical microscope. The results showed enhanced underwater tribological properties because of excellent self-lubricating properties of PTFE fibers and a good lubricating effect and load-carrying capacity of graphite fillers. Improved underwater mechanical strength was connected to the high strength of epoxy resin and high bonding force between Nomex and epoxy resin.Keywords:fabric composite;epoxy;graphite;friction and wear;water-lubricated
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Niandu Wu,Wenhua Zhao,Boye Zhou,Yizhang Wu,Wentao Hou,Wei Xu,Jun Du,Wei Zhong
Ti 3 C 2 T x (MXene) has intriguing application potential for supercapacitors. However, it usually suffers from self-accumulate and restack, resulting in the decrease of electrochemical active sites and low capacitance. Here, we demonstrated a 3D nitrogen-doped Ti 3 C 2 T x /rGO (NTG) foam which was synthesized through the multistep of gelation assisted with urea, freeze-drying, and thermal treatment processes. The decomposition of urea can not only change the morphology, bringing out more open marco- and microporous structures, but also improve the conductivity due to the nitrogen doping in the matrix. The 3D porous architecture can expose more electrochemical active sites, and thus accelerate the transport/diffusion of electrolyte ions. Consequently, the NTG foam possesses a high specific capacitance of 463 F g −1 , good rate performance, and outstanding cycling stability (90.8% retention after 10 000 cycles) in H 2 SO 4 electrolyte, showing enhanced performance of supercapacitors in comparison with pure Ti 3 C 2 T x and Ti 3 C 2 T x /rGO electrode.
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高影响因子
Journal of Energy Storage
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2021
·
IF 6.583
Xin-ru Wang,Jing Zhong,Kai-da Zhu,Sen-lin Wang
To suppress the sulfation of the negative electrode of lead-acid batteries, a graphene derivative (GO-EDA) was prepared by ethylenediamine (EDA) functionalized graphene oxide (GO), which was used as an effective additive for the negative electrode of lead-acid batteries. The effect of GO-EDA on the performance of lead-acid batteries was studied by electrochemical methods, simulated cell performance test, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that when the negative active material (NAM) contains 0.5 wt.% GO-EDA additive (the N-0.5 cell), the initial discharge capacity of the cell at a rate of 0.05 C is 171.47 mAh g −1 . Meanwhile, the high-rate partial state of charge (HRPSoC) cycle life of the N-0.5 cell under 1 C rate is 17,970 cycles, which is 280% higher than that of the blank control cell. In a word, GO-EDA has the potential to be applied to enhance the specific capacity and HRPSoC cycle-life of lead-acid batteries.
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高影响因子
Carbon Energy
·
2021
·Vol. 4
·期 2
·155-169
·
IF 0
Junfeng Li,Kwan San Hui,Shunping Ji,Chenyang Zha,Chengzong Yuan,Shuxing Wu,Feng Bin,Xi Fan,Fuming Chen,Zongping Shao,Kwun Nam Hui
Aluminum–metal batteries show great potential as next-generation energy storage due to their abundant resources and intrinsic safety. However, the crucial limitations of metallic Al anodes, such as dendrite and corrosion problems in conventional aluminum–metal batteries, remain challenging and elusive. Here, we report a novel electrodeposition strategy to prepare an optimized 3D Al anode on carbon cloth with an uniform deposition morphology, low local current density, and mitigatory volume change. The symmetrical cells with the 3D Al anode show superior stable cycling (>450 h) and low-voltage hysteresis (~170 mV) at 0.5 mA cm −2 . High reversibility (~99.7%) is achieved for the Al plating/stripping. The graphite | | Al-4/CC full batteries show a long lifespan of 800 cycles with 54 mAh g −1 capacity at a high current density of 1000 mA g −1 , benefiting from the high capacitive-controlled distribution. This study proposes a novel strategy to design 3D Al anodes for metallic-Al-based batteries by eliminating the problems of planar Al anodes and realizing the potential applications of aluminum–graphite batteries.
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ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Jing Liang,Qiang Shan,Tianqi Liu,Wenbin Liang,Xin Zhang,Wei Qi,Hongxin Tan,Shaobo Du,Lijuan Qian,Zhan Li,Ximeng Chen
Heteroatom-doped nanoporous graphene has great potential as emerging energy storage materials, but the complex synthetic routes and disordered structure limit the improvement of supercapacitance performance. Herein, we develop a one-step synthesis strategy to obtain nitrogen/sulfur doped nanoporous graphene (NS-NG). Graphene oxides absorbed with dyes are burned in a confined interlayer of porous hydrotalcite for preparing NS-NG. Interestingly, the NS-NG retains the morphology of multilayer graphene oxides coated with fiber rods before combustion, so it exhibits the annual ring -shaped structure, larger surface area, and highly porosity. Importantly, the NS-NG not only shows a high specific capacitance of 325 F g −1 , and also has a high energy density of 25 Wh kg −1 at a high power density of 1906 W kg −1 with an excellent capacity retention of 86% after 10,000 cycles applied in the two-electrode symmetric supercapacitor at a current density of 2 A g −1 in 0.5 M Na 2 SO 4 aqueous solution.
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高影响因子
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