PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Hao Lu,Shengtao Zhang,Zhiheng Zhao,Yang Zhou,Weihua Li
In this paper, VB 2 had been added to modify the simple oligoanilines integrated with rGO for further improving the corrosion protection properties. Trimer aniline (TA) had been synthesized to fabricate a novel composite with rGO after functionalized with VB 2 . Through the combination of VTA and rGO, enhanced electrical properties were discovered, which were attributed to the graphitic structure and the π-π* interactions between rGO and VTA. As a result, VTA-rGO composite provided excellent barrier performance against corrosive electrolyte diffusion and owned better corrosion protection properties than TA and VTA individually, with the combination of VTA and rGO.
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高影响因子
Materials
·
2020
·Vol. 13
·期 4
·933
·
IF 3.057
Yuexuan Li,Yugang Duan,Chengmeng Wang
Graphene has been regarded as one of the most promising two-dimensional nanomaterials. Even so, graphene was still faced with several key issues such as impedance mismatching and narrow bandwidth, which have hindered the practical applications of graphene-based nanocomposites in the field of microwave absorption materials. Herein, a series of Si-modified rGO@Fe3O4composites were investigated and fabricated by a simple method. On one hand, the degree of defects in graphene carbon could be tuned by different silane coupling reagents, which were beneficial to enhancing the dielectric loss. On the other hand, the spherical Fe3O4nanoparticles provided the magnetic loss resonance, which contributed to controlling the impedance matching. Subsequently, the electromagnetic absorption (EMA) properties of Si-modified rGO@Fe3O4composites with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) were investigated in this work. As a result, the Si(2)-rGO@Fe3O4/PVDF-co-HFP composite exhibited the excellent EMA performance in the range of 2–18 GHz. The maximum reflection loss (RLmax) reached −32.1 dB at 3.68 GHz at the thickness of 7 mm and the effective absorption frequency bandwidth for reflection loss (RL) below −10 dB was 4.8 GHz at the thickness of 2 mm. Furthermore, the enhanced absorption mechanism revealed that the high-efficiency absorption performance of Si(2)-rGO@Fe3O4/PVDF-co-HFP composite was attributed to the interference absorption (quarter-wave matching model) and the synergistic effects between Si(2)-rGO@Fe3O4and PVDF-co-HFP. This work provides a potential strategy for the fabrication of the high-performance EMA materials.Keywords:absorbing materials;Si-modified rGO@Fe3O4/PVDF-co-HFP composites;dielectric loss;magnetic loss;electromagnetic properties
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Yujie Han,Xujie Su,Lifang Fan,Zhiguang Liu,Yujing Guo
Cardiac troponin I (cTnI) is a “gold standard biomarker” for clinical diagnose of acute myocardial infarction (AMI) . Rapid, accurate, and sensitive detection methods for cTnI are highly urgent and significant in early diagnosis and progression control. In this work, we proposed an electrochemical aptasensing platform for cTnI detection based on copper nanowires/molybdenum disulfide/reduced graphene oxide (CuNWs/MoS 2 /rGO) ternary nanostructure. The CuNWs/MoS 2 /rGO composite exhibited improved electrochemical activity due to the high electrochemical conductivity and the synergistic effect among each component, and the large surface area, which also facilitates the immobilization of aptamers. As a result, the constructed electrochemical cTnI aptasensor shows good selectivity, stability, and reproducibility towards cTnI. Under optimized conditions, the aptasensor responses cTnI linearly from 5.0 × 10 −13 to 1.0 × 10 −10 g mL −1 with a detection limit of 1.0 × 10 −13 g mL −1 (S/N = 3). The analysis of cTnI in human blood samples demonstrated its practicability with comparable results. This work offers an alternative way for facile fabrication of CuNWs/MoS 2 /rGO based aptasensor for clinical biomarker detection.
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2016
·
IF 4.425
Zhensheng Hong,Kaiqiang Zhou,Junwen Zhang,Zhigao Huang,Mingdeng Wei
With the aim of enhancing the electrochemical kinetics and capacity of the TiO2 electrode for Na ion batteries (NIBs), we have designed a hybrid material of carbon-coated TiO2 mesocrystals anchored on reduced graphene oxide (TiO2@C-rGO). Such hybrid nanostructures are fabricated through a facile one-step route including in situ growth of oriented self-assembly of TiO2 mesocrystals on GO. TiO2@C-rGO possesses a very large surface area (279 m2 g–1), mesoporous nature, and single-crystal-like structure. It is also found that the capacity of TiO2 electrode for NIBs could be improved by carbon coating at a low current rate, but pure TiO2 shows better rate performance than that of TiO2@C. Remarkably, the enhanced electrochemical kinetics and large capacity can be simultaneously achieved by designing hybrid material. The hybrid nanostructures exhibit a highly reversible capacity of 300 mAh g–1 at 100 mA g–1, superior rate capability, and long-term cycling stability (a stable capacity of 159 mAh g–1 can be maintained after 1000 cycles at 1 A g–1). The superior Na ion storage of TiO2@C-rGO is largely ascribed to the robust architecture of well-dispersed carbon-coated mesoporous TiO2 mesocrystals anchored on conductive graphene network, leading to enhanced electrochemical kinetics and offering enough active sites for the Na ion to locate.
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高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 6
·期 3
·963-971
·
IF 8.867
Yuchao Wang,Canzhu Wang,Xiangju Song,Suresh Kumar Megarajan,Heqing Jiang
Solar-driven water evaporation assisted by photothermal membranes is considered as one of the sustainable and cost-effective strategies for pure water generation and wastewater treatment. Herein, we report a facile but effective approach to improve the photothermal performance by combining 2D reduced graphene oxide (rGO) and 1D multi-walled carbon nanotubes (MWCNTs), which have different nanomorphologies. The photothermal layer can be easily deposited on different substrate materials via simple vacuum assistance. Such a composite photothermal layer shows a rough surface with a controllable nano-structure, which can thus optimize solar light harvesting. On the other hand, the formation of a loose internal porous structure and suitable wettability ensure water transport inside the photothermal layer during evaporation. The surface temperature reaches as high as 78 °C even under one sun irradiation (1 kW m−2), which is 10 °C higher than the result of pure rGO membranes. When loaded on a PVDF substrate, the rGO–MWCNT based membrane is flexible and shows an obvious improvement in the evaporation rate, about 79.0% and 8.9% higher than those of pure rGO and MWCNT membranes, respectively. The solar thermal conversion efficiency can reach up to 80.4% without any extra accessory for thermal management. Based on our results, the nanocomposite strategy is facile and effective for the development of novel photothermal membranes for high-efficiency evaporation, and contributes to the widespread application in the fields of desalination and wastewater treatment.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Haopeng Cai,Chaochao Feng,Hongbo Xiao,Bo Cheng
Due to the pressing need for electromagnetic interference and radar stealth, microwave absorbers have garnered considerable attention. Through chemical co-precipitation and in-situ polymerization, we synthesize a ternary composite containing reduced graphene oxide , Fe 3 O 4 with flower-like nanostructures , and polyaniline (PANI). To fine-tune the impedance matching and corrosion resistance of composite materials, the conductive PANI was densely coated on the surface of reduced graphene oxide (rGO)/flower-like Fe 3 O 4 (f-Fe 3 O 4 ). The ternary composite exhibits excellent microwave absorption performance. In comparison to rGO/f-Fe 3 O 4 (1:10), which has a minimum reflection loss (RL min ) of −32.81 dB at 10.61 GHz and a 5.15 GHz effective absorption bandwidth (EAB) (7.34–12.49 GHz), rGO/f-Fe 3 O 4 (1:10)@PANI has an RL min of −46.49 dB at 9.93 GHz with a 2.5 mm thickness and an EAB of 4.25 (8.90–13.15 GHz). The results indicate that the addition of the PANI anticorrosion coating layer has no discernible effect on the final microwave absorption performance. This article also examines the effect of rGO weight ratio on microwave absorbing properties. When the rGO content is too high, the impedance will be mismatched, while the too low rGO content will affect the absorbing performance. This research work has contributed to our present understanding of the structure design and composition control of microwave absorbers.
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高影响因子
Nanoscale
·
2019
·Vol. 11
·期 12
·5571-5579
·
IF 6.97
Shuangshuang Kai,Baojuan Xi,Denghu Wei,Shenglin Xiong
It is well known that efficient charge separation is a crucial factor for the enhancement of photocatalytic activity for hydrogen evolution, and the internal electric field is commonly designed to improve charge separation. The microstructure of a catalyst has a significant effect on the photocatalytic and photoelectrochemical (PEC) performance. Herein, two samples are engineered with similar morphology but different crystal structures. Small wurtzite (WZ)/zinc blende (ZB) -Cd0.6Zn0.4S nanorods are featured with dense type-II homojunctions. By utilizing the excellent thermal conductivity of graphene to eliminate thermal fluctuations, WZ-Cd0.6Zn0.4S/RGO is obtained by anchoring Cd0.6Zn0.4S nanorods on the graphene sheets. The elongated WZ/ZB-Cd0.6Zn0.4S nanorods with an internal electric field formed by the heterophase homojunction greatly improve the photocatalytic hydrogen production rate to 36.33 mmol h−1 g−1, much higher than that of WZ-Cd0.6Zn0.4S-RGO. On the contrary, WZ-Cd0.6Zn0.4S/RGO shows superior photoelectrochemical performance under an external electric field, benefiting from the excellent electric conduction and the 2D network of RGO as electron transportation channels. The study strategy and synthetic route for the Cd0.6Zn0.4S nanorods with a homojunction and a homogenous structure in our work may open up new avenues for the fabrication of other semiconductor materials with distinctive photocatalytic and PEC applications.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Jie Yu,Yuan Zhang,Jiahao Chen,Lele Cui,Wenheng Jing
A solvothermal-induced assembly of a 2D-2D reduced graphene oxide (rGO)-TiO 2 mesoporous material with a laminar structure for membrane construction is reported, in which using 2D-2D rGO-TiO 2 as building blocks can preeminently enhance the separation properties of the as-prepared membrane without sacrificing the permeance. Taking advantage of the large specific surface area (324 m 2 /g) available for interfacial effects as well as interwoven stacking and narrow layer spacing of 2D morphologies for size exclusion, the fresh rGO-TiO 2 membrane exhibited excellent separation performance toward organic dye from water (>97.3% for Rhodamine B, Methyl orange, Methyl blue and Congo red), while achieving good permeance up to approximately 9.36 L m −2 h −1 bar −1 and an outstanding structural stability under the cross-flow process of filtration. More importantly, the reduced band gap energy (Eg) of 2D-2D rGO-TiO 2 membrane layer (2.77 eV) compared with that of the blank TiO 2 membrane (3.24 eV) allows the rGO-TiO 2 membrane to have an impressive self-cleaning ability and thus exhibits great potential application in the field of membrane separation .
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高影响因子
Energy & Environmental Materials
·
2023
·Vol. 7
·期 2
·e12585
·
IF 15
Dongdong Zhang,Qiliang Wei,Haili Huang,Lan Jiang,Jie Teng,Ruizhi Yu,Qing Zhang,Shengxing Liu,Lin Wang,Weiyou Yang
Crystalline γ-Ga 2 O 3 @rGO core–shell nanostructures are synthesized in gram scale, which are accomplished by a facile sonochemical strategy under ambient condition. They are composed of uniform γ-Ga 2 O 3 nanospheres encapsulated by reduced graphene oxide (rGO) nanolayers, and their formation is mainly attributed to the existed opposite zeta potential between the Ga 2 O 3 and rGO. The as-constructed lithium-ion batteries (LIBs) based on as-fabricated γ-Ga 2 O 3 @rGO nanostructures deliver an initial discharge capacity of 1000 mAh g −1 at 100 mA g −1 and reversible capacity of 600 mAh g −1 under 500 mA g −1 after 1000 cycles, respectively, which are remarkably higher than those of pristine γ-Ga 2 O 3 with a much reduced lifetime of 100 cycles and much lower capacity. Ex situ XRD and XPS analyses demonstrate that the reversible LIBs storage is dominant by a conversion reaction and alloying mechanism, where the discharged product of liquid metal Ga exhibits self-healing ability, thus preventing the destroy of electrodes. Additionally, the rGO shell could act robustly as conductive network of the electrode for significantly improved conductivity, endowing the efficient Li storage behaviors. This work might provide some insight on mass production of advanced electrode materials under mild condition for energy storage and conversion applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiaqi Tan,Shuping Wen,Xiaoqian Lin,Liya Zheng,Zhilin Tian,Bin Li
Two-dimensional nanomaterials have garnered significant attention for electromagnetic wave absorption applications. However, developing effective microwave absorption materials suitable for complex environments remains a significant challenge. In this study, multifunctional rGO/MXene/SiC nanowires (GMS) aerogels are synthesized through a hydrothermal and electrostatic self-assembly method. The three-dimensional rGO/MXene skeleton with a hierarchical porous structure endows GMS aerogel with low density (11.4 mg cm −3 ) and thermal conductivity (30.1 mW·m −1 ·K −1 ). The incorporation of SiC nanowire enhances the mechanical properties of the aerogel, achieving a compressive strength of approximately 7.64 kPa at 30 % strain. Furthermore, SiC nanowire introduces numerous heterogeneous interfaces, which regulate electrical conductivity and improve impedance matching. The presence of abundant lattice defects and functional groups contributes to the exceptional microwave absorption performance of the aerogel, which achieves a minimum reflection loss of −81.04 dB at a thickness of 2.68 mm with a low filling ratio of 5.5 wt%. The effective absorption bandwidth covers the entire Ku band with an optimal thickness range from 2.58 to 2.81 mm. Additionally, the aerogel demonstrates excellent pressure-sensing capability, responding rapidly to various human movements. Therefore, this study provides a promising design strategy for high-performance microwave absorbers with multifunctionality.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhangbiao Xu,Lei Xu,Junyu Lu,Yongfen Sun,Junjie Shu,Yang Xiong,Wentian Zhang
This study presents a valuable repurposing approach for spent cathode carbon, in which the aluminum electrolysis spent cathode carbon was successfully converted into graphene oxide by Hummer’s method of oxidative intercalation with synergistic ultrasonic exfoliation, and further constructed NiCoLDH/rGO-SCC composites to be used in the electrode materials of hybrid supercapacitor. The large specific surface area of graphene oxide serves as a conductive channel in the electrodes, facilitating charge transfer during the reaction process, in addition to providing NiCoLDH nanosheets with a large number of spatial sites. Electrochemical tests and density functional theory calculations confirmed that graphene oxide facilitated charge transfer during pseudocapacitive reactions. In the three-electrode system, the composite exhibited a specific capacity of 2818 F g −1 , ensuring outstanding electrochemical performance for the hybrid supercapacitor. The results showed that the assembled hybrid supercapacitor could reach an energy density of 35.93 Wh kg −1 at a power density of 375 W kg −1 , and still possesses a capacity retention rate of 85.25 % after 1000 charge/discharge cycles. Consequently, the results demonstrated the supercapacitor’s significant application prospects. This approach provides a sustainable way to recycle spent cathode carbon and develop new capacitor electrode applications.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yongkang Li,Feitong Ren,Jiayin Li,Yao Chen,Jun Liu,Chun Yang
Chloramphenicol (CAP) has demonstrated favorable therapeutic effects against various bacteria and is widely utilized in the aquaculture industry. However, CAP has recently been classified as a carcinogen, emphasizing the importance of developing effective methods to monitor its concentration. In this study, one-dimensional/two-dimensional (1D/2D) SnO 2 /reduced graphene oxide (rGO) composites were employed to modify a glassy carbon electrode (GCE) for the electrochemical detection of CAP. The SnO 2 /rGO composite materials were synthesized via a solution reaction and calcination method. Optimal electrochemical sensing conditions, including pH values, scan rates, and accumulation parameters, were systematically investigated to demonstrate feasibility. The resulting SnO 2 /rGO/GCE achieved a current density of 154.56 µA/cm², up to 75 times higher than other modified electrodes. Furthermore, the SnO 2 /rGO/GCE exhibited a strong linear relationship within a detection range of 0.001–100 μM and an excellent limit of detection of 0.315 nM for CAP. Finally, the electrodes with optimized modifications were successfully applied to determine CAP concentrations in real lake water and milk samples. These promising results suggest that the as-fabricated SnO 2 /rGO electrode presents a novel and highly effective approach for CAP detection.
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高影响因子
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