ELECTROCHIMICA ACTA
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2022
·
IF 7.336
Ling Yang,Lei Sheng,Xingxu Gao,Xin Xie,Yaozong Bai,Gaojun Liu,Haoyu Dong,Tao Wang,Xianli Huang,Jianping He
Lithium metal batteries (LMBs) with ultra-high theoretical energy density are a prospective candidate to replace current lithium-ion batteries (LIBs). However, there are still two non-negligible problems of lithium dendrites and the volume expansion effect of LMBs. In this study, reduced graphene oxide (rGO)/Li-Al-LDH composite nanosheets were firstly prepared via a hydrothermal method and then vacuum filtered onto commercial polypropylene (PP) separator. This kind of rGO/Li-Al-LDH nanosheets layer is expected to improve the wettability of liquid electrolytes and thermal stability. Furthermore, rich- Li-Al LDH can promote more ionic carriers and channels, which exhibits higher-efficiency lithium-ion transport properties. Meanwhile, rGO with a graphitic-like structure is able to disperse the concentration of electrons at the sharp point when lithium dendrites arise. As a result, the discharge capacity of the Li||LiFePO 4 cells based on the rGO/Li-Al-LDH@PP separator is still 1.852 mAh after 250 cycles and the capacity decay rate is just 4.24%. It is demonstrated that a feasible and effective strategy for the modified separator can enhance the electrochemical performance of LMBs.
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高影响因子
CARBON
·
2022
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IF 11.307
Fanbin Meng,Yao Chen,Weihua Liu,Likui Zhang,Wenting Deng,Zichao Zhao
It is of vital importance to eliminate the electromagnetic interference of various electronic devices in military and civil fields. However, many researches focus on electromagnetic shielding while ignoring the practical environmental suitability of materials. In this work, the Dimethyl octadecyl (3- trimethoxylsilyl propyl) ammonium chloride (DMAOP) chains were introduced into reduced oxide graphene sheets to achieve the composite films (RGOFs) with “brick-slurry” structure by simple room temperature chemical reaction combined with vacuum filtration technology. Ultimately, the RGOFs exhibited multifunctional features, including great electromagnetic shielding (EMI) performance (above 6.6 × 10 4 dBꞏcm −1 ), high strength and toughness properties (∼240 MPa, 6.28%), and excellent environmental adaptability. The formed dense “brick-slurry” structure is conductive to the construction of conductive path , contributing to the high EMI. Further, molecular dynamics simulation, in situ scanning and in situ Raman illustrated that the DMAOP molecular chain could strengthen the orientation, stress transfer, and delay the crack propagation by connecting graphene sheets , resulting high strength and toughness. Besides, the obtained films also exhibited excellent antibacterial properties , and acid, alkali environment adaptability due to their special components and interface design scheme. This work can provide ideas for developing effective preparation approaches of graphene-based membranes with excellent properties in the context of the requirements of a new generation of high-performance materials.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Jixian Ma,Binxia Zhao,Xiaoxiao Fan,Wenjie Wang,Xingliang Chen,Nan Shao,Peiyang Jiang
An efficient Ag/rGO/Bi 2 WO 6 nanocomposite was synthesized by the precipitation-photoreduction method. The resulting Ag/rGO/Bi 2 WO 6 showed excellent photocatalytic activity for the photodegradation of Rhodamine B (RhB), with 15%Ag/rGO/Bi 2 WO 6 photodegrading 96.97% of RhB in 180 min, which was 1.28, 1.09 and 1.05 times higher than that of Bi 2 WO 6 , Ag/rGO, and rGO/Bi 2 WO 6 , respectively. The effect of noble metal Ag's surface plasmon resonance and Schottky barrier , as well as the superior electron transfer ability of rGO , dramatically improved photo-generated electron-hole pair separation and transfer efficiency. In addition, the effects of pollutant concentration, pH, and catalyst dosage on Ag/rGO/Bi 2 WO 6 photocatalytic performance also were explored. Furthermore, the free-radical trapping tests revealed that the primary active radicals in the catalytic system are hole (h + ), superoxide radical (•O 2 − ), and hydroxy radical (•OH). Additionally, after four recycling, the photocatalytic performance of the Ag/rGO/Bi 2 WO 6 composite did not show a significant decline. As a result of this research, the Ag/rGO/Bi 2 WO 6 catalyst, as developed, has a bright potential for environmental purifying.
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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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高影响因子
TALANTA
·
2023
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IF 6.1
Zeyu Ma,Jingyu Wang,Xing Lu,Guobao Zhou,Yi Wu,Dan Zhang,Lei Li,Longhua Guo
Heterogeneous electrochemical DNA biosensors have attracted huge attention due to their enhanced signal sensitivity, compared to homogeneous biosensors. However, the high cost of probe labeling and the reduced recognition efficiency associated with current heterogeneous electrochemical biosensors confine their potential applications. In the present work, a dual-blocker assisted and dual-label-free heterogeneous electrochemical strategy based on multi-branched hybridization chain reaction (mbHCR) and reduced graphene oxide (rGO) was fabricated for ultrasensitive detection of DNA. The target DNA could trigger the mbHCR of two DNA hairpin probes, resulting in the generation of multi-branched long chain of DNA duplexes with bidirectional arms. One direction of the multi-branched arms in the mbHCR products were then bound to the label-free capture probe on the gold electrode through multivalent hybridization with enhanced recognition efficiency. The other direction of multi-branched arms in mbHCR product could adsorb rGO via π-π stacking interactions. Two DNA blockers were ingeniously designed to block the binding of excessive H1-pAT on electrode and to prevent the adsorption of rGO by residual unbound capture probes. As a result, with the electrochemical reporter methylene blue selectively intercalated into the long chain of DNA duplex and absorbed on rGO, a remarkable electrochemical signal rise was observed. Thus, a dual-blocker aided and dual-label-free electrochemical strategy for ultrasensitive DNA detection is readily realized with the merit of cost-effective. The as-developed dual-label-free electrochemical biosensor has great potential to be employed in nucleic acid related medical diagnostics.
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DOI
PubMed
高影响因子
RSC Advances
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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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PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
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IF 5.302
Lanxin Hu,Aiyang Wang,Tian Tian,Chun Liu,Wenchao Guo,Qianglong He,Hao Wang,Jingjing Xie,Weimin Wang,Zhengyi Fu
In this study, B 4 C–SiC–rGO composites with different SiC contents were prepared by spark plasma sintering at 1800 °C for 5 min under a uniaxial pressure of 50 MPa. The effects of SiC on the microstructures and mechanical properties of the B 4 C–SiC–rGO composites were investigated. The optimal values for flexural strength (545.25 ± 23 MPa) and fracture toughness (5.72 ± 0.13 MPa·m 1/2 ) were obtained simultaneously when 15 wt.% SiC was added to 5 wt.%–GO reinforced B 4 C composites (BS15G5). It was found that SiC and rGO inhibited the grain growth of B 4 C and improved the mechanical properties of the B 4 C–SiC–rGO composites. The clear and narrow grain boundaries of rGO–B 4 C and rGO–SiC, as well as the semi-coherent B 4 C–SiC interface, indicated strong interface compatibility. The twin structures of SiC and B 4 C observed in the composites improved their fracture toughness. Crack deflection and crack bridging caused by the SiC grains as well as rGO bridging and rGO pull-out were observed on the crack propagation path.
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高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2023
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IF 4
Lu Danli,He Zhiping,Liu Weiliang
In this work, a novel NiCo/ZIF-67/rGO catalyst was prepared via a facile impregnation-reduction method, followed by comprehensive characterization using XRD, SEM, TEM, XPS, and ICP-OES techniques. This catalyst featured a hierarchical porous support consisting of Zeolitic Imidazolate Framework-67 (ZIF-67) with a high specific surface area and reduced graphene oxide (rGO) with considerable electronic conductivity, along with strong synergistic interactions between Ni and Co species as well as between the deposited metals and the carbon in rGO. The NiCo/ZIF-67/rGO catalyst exhibited excellent activity in catalyzing the hydrolysis of NaBH 4 , resulting in a low activation energy ( E a ) of 21.08 kJ mol −1 and a high turnover frequency (TOF) value of 5420 \(mL_{{\textit{H}}_\text{2}}g_\textit{M}^{-1}\min^{-1}\) . The hydrogen generation rate was increased by nearly double after five cyclic experiments, demonstrating the exceptional catalytic durability of NiCo/ZIF-67/rGO. The as-prepared NiCo/ZIF-67/rGO catalyst exhibits the advantages of cost-effectiveness, durability, and superior performance for NaBH 4 hydrolysis, rendering it a promising candidate for industrial applications.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2023
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IF 2.5
Lin Yueming,Dai Huimin,Su Siyu,Zhu Xiaohong
The hydrophilicity of carbon cloth was improved through pretreatment using an oxidation process resulting in activated carbon cloth with microscopically pronounced grooved cracks. This activated carbon cloth served as a highly hydrophilic substrate suitable for electrode material loading while also possessing attractive electrochemical properties. Polypyrrole/reduced graphene oxide (PPy/rGO) composites were subsequently polymerized and chemically reduced in situ on the pretreated carbon cloth (HCC), introducing nitrogen atoms of different valences into the composite. Contact angle and electrochemical tests demonstrate that the prepared electrode material displayed enhanced hydrophilicity and low impedance. Based on HCC/PPy/rGO, the symmetrical flexible quasi-solid supercapacitor exhibited a high energy density of 0.60 mWh cm −3 at a power density of 6.25 mW cm −3 , as well as a great power density of 62.5 mW cm −3 at 0.34 mWh cm −3 and good flexibility. Moreover, three fabricated supercapacitor devices connected in series illuminated a white LED for about 4 min, demonstrating the potential use of pretreated-carbon cloth/polypyrrole/rGO materials for flexible wearable devices.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Rui Liu,Huanzhong Zeng,Yuanyou Peng,Yumeng Wang,Fen Ran
The diffusion of lithium ions and sodium ions in the anode materials is the main factor limiting the fast-charging performance of lithium and sodium-ion batteries. Due to the slow diffusion kinetics, taking lithium-ion batteries as an example, lithium ions and electrons accumulate locally in and on the surface of anode materials, especially in the process of fast-charging, resulting in uneven lithiation reaction and enormous transient stress, which leads to poor fast-charging performance. In this work, from the aspect of solving the ion diffusion rate, a capacitive type of energy storage is introduced by designing MoS 2 /rGO composite materials with pinned structures as fast-charging and stable anode materials for lithium-ion batteries and sodium-ion batteries. Combining the high ion conductivity and structural rigidity of the rGO conductive network with a few-layer MoS 2 provides a high ion diffusion rate and capacity. As expected, it can charge to 69 % in 25 min and 44 % in 3.2 min, respectively, providing a high capacity of 214.2 mAh g −1 at 10 A g −1 and a high-capacity retention of 85.31 % after 1, 000 cycles at the current density of 3 A g −1 in sodium-ion batteries. Similarly, the high reversible capacity of 910.5 mAh g −1 is achieved in the lithium-ion batteries, and there is almost no capacity loss after 1, 000 cycles at a high current density of 2 A g −1 . This work may provide a reference for designing more fast-charging anode materials with high capacity.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Aifeng Liu,Yu Zheng,Hongwei Che,Tian Tian,Zengcai Guo,Jingbo Mu,Xiaoliang Zhang,Yanming Wang,Xiaoyan Liu
Layered double hydroxides (LDHs) as electrode materials for supercapacitors still suffer from limited actual specific capacities and unsatisfactory cycling performance owing to their poor intrinsic electrical conductivity and insufficient electroactive sites. Herein, oxygen vacancy (Ov)-rich CoAl-LDH nanosheets are attached onto reduced graphene oxide (rGO) nanosheets to form 2D/2D Ov-CoAl-LDH/rGO sheet-on-sheet heterostructures via a facile precipitation-reduction reaction followed by hydrothermal treatment . The introduction of rich Ov defects in CoAl-LDHs enhances the electrical conductivity, while the attachment of Ov-CoAl-LDH nanosheets on the surface of rGO nanosheets not only reduces the aggregation of Ov-CoAl-LDH nanosheets and thus exposes abundant electroactive sites, but also maintains good structural stability. Theory calculations indicate that the Fermi-level difference of two components triggers interfacial charge separation while creating a built-in electric field at the Ov-CoAl-LDH/rGO interface, which favors rapid electron/ion migration and accelerates charge storage kinetics. The optimized Ov-CoAl-LDH/rGO nanocomposites deliver specific capacities of 984 C g −1 at 3 A g −1 and 708 C g −1 at 20 A g −1 and retain an initial capacity of 90 % after 10,000 cycles at 10 A g −1 . These findings showcase a feasible strategy to endow 2D/2D LDHs/graphene heterostructures with enhanced charge storage performance.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xueyu Wei,Saraschandra Naraginti,Xiaofan Yang,Xiaoping Xu,Jiyuan Li,Meiqing Zhu,Pengli Chen,Pei Jiang
The simultaneous degradation of organic pollutants and generation of value-added compounds like ammonia and hydrogen energy has recently gained considerable attention in photocatalysis . The present study deals with successful preparation of novel AgVO 3 nanowire@rGO-tetrahedral Ag 3 PO 4 (110) (AGA) heterojunction and utilized for enhanced generation of NH 3 and H 2 from N-containing antibiotic sulfamethoxazole (SMX) under visible light. The prepared catalyst was well characterized by XRD , SEM, TEM and XPS to confirm the formation of heterojunction . The results indicated that the composite exhibited 546.0 μmol g −1 of hydrogen evolution rate, which is approximately 3.6 (153.6 μmol g −1 ) and 5.1 (108.7 μmol g −1 ) times higher than the pure AgVO 3 and Ag 3 PO 4 respectively after 6 h. Similarly, 38.3 mg L −1 g −1 of NH 3 generation was observed during 6 h of SMX degradation, which is about 1.9 and 2.8 times higher than the pure AgVO 3 (20.1 mg L −1 g −1 ) and Ag 3 PO 4 (13.7 mg L −1 g −1 ) respectively. The formation of heterojunction between AgVO 3 and Ag 3 PO 4 not only promotes the transfer of electron but also prevents the recombination which eventually enhances the catalytic conversion of N-element to NH 3 and for H 2 generation during water splitting. Furthermore, the plausible degradation pathway in SMX was proposed and the results revealed that the SMX was mineralized by the composite further converted to NH 3 and generates H 2 during the degradation process . Thus, our study provides new insights into novel photocatalytic treatment methodologies for simultaneous degradation of SMX to produce NH 3 and H 2 as value-added compounds from antibiotic wastewaters during water treatment process.
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高影响因子
危险品化学品经营许可证（带存储）