International Journal of Electrochemical Science
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2025
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IF 2.4
Gaosheng Nie,Xiongfei Sun,Liyin Xu,Ke Wu,Zilong Wei,Shuwu Liu
MOF-derived cobalt oxides (CoO x ) have attracted extensive attentions due to their excellent theoretical specific capacitances, permanent porosity and controllable structures. However, the inherent poor conductivity of single-component cobalt oxide, and the structural collapse, pore loss and agglomeration during pyrolysis process are still the main factors to limit the performance of CoO x . Structure design of 3D hierarchical porous heterostructure composites through 0D/1D/2D materials is an effective strategy for boosting the capacitive performance of CoO x . Herein, the rationally designed 3D hierarchically porous CoO x /MWCNTs/rGO ternary hybrid composite was constructed through high-temperature pyrolysis of a facile self-assembled 0D/1D/2D Co-MOF/MWCNTs/GO precursor. Indeed, The CoO x /MWCNTs/rGO electrode exhibited an excellent specific capacitance of 520 F g −1 at 0.5 A g −1 , outstanding rate capability of 80.77 % capacitance retention even at 20 A g −1 , and ideal durability with about 8.4 % capacitance decay after 10000 cycles. Moreover, the CoO x /MWCNTs/rGO exhibited a maximum energy density of 14.6 Wh kg −1 with a power density of 41.2 W kg −1 .
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
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IF 5.3
Yupeng Zou,Yu Ma,Lingsai Meng,Shengxiang Xiong,Lijuan Cai,Gang Chen,Chengjun Dong,Hongtao Guan
In this work, reduced graphene oxide (RGO)-based composites loaded with magnetic CoFe 2 O 4 (CFO) and CoFe were successfully synthesized via heat treatment of basic ferric cobalt carbonate (BFCC) under different temperatures. The impact of adding CFO and CoFe on the electromagnetic parameters and absorption properties was investigated. When 40 wt% CFO flakes and CoFe particles are added to the RGO matrix and the filler content is 20 wt% in paraffin, there gives a reflection loss of −48 dB with a 5.5 GHz absorption bandwidth at 2.1 mm thickness, and −50 dB with 4.8 GHz at 2.9 mm, respectively. The coupling of a magnetic medium can change the electromagnetic loss mechanism in the material, which ultimately affects the absorption properties of the material. This study provides a good basis for the design of composite materials of RGO as microwave absorbing materials, enabling large-scale production of high-performance absorption materials.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2017
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IF 3.012
Shuo Duan,Yuming Huang
A novel electrochemical sensor was developed for the sensitive and selective detection of Cu 2 + , Pb 2 + and Cd 2 + , which was based on NH 2 -MIL-88(Fe)-rGO composite modified glass carbon electrode (NH 2 -MIL-88(Fe)-rGO/GCE). The NH 2 -MIL-88(Fe)-rGO composite was facilely prepared by a one-step method and characterized by SEM, XRD, Raman spectrum and electrochemical methods. The stepwise GCE modified process was investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrochemical behaviors of Cu 2 + , Pb 2 + and Cd 2 + ions on the NH 2 -MIL-88(Fe)-rGO/GCE were explored by differential pulse anodic stripping voltammetry (DPASV). It was found that NH 2 -MIL-88(Fe)-rGO was capable of adsorbing Cu 2 + , Pb 2 + and Cd 2 + ions from aqueous solutions and the NH 2 -MIL-88(Fe)-rGO/GCE could enhance the electrochemical responses of Cu 2 + , Pb 2 + and Cd 2 + effectively. Important operational parameters such as electrolyte pH and deposition time were investigated and optimized for the determination of trace Cu 2 + , Pb 2 + and Cd 2 + ions. Under the optimum conditions, the proposed electrochemical sensor had a linear range of 0.005––0.3 μM for Cd 2 + , 0.01–0.3 μM for Pb 2 + and 0.005–0.05 μM for Cu 2 + , respectively. The limits of detection (LODs) are 4.9 nM for Cd 2 + , 10 nM for Pb 2 + and 3.6 nM for Cu 2 + , respectively. The proposed method has been successfully applied to determine three metal ions in water samples. The developed sensor promises simple preparation, fast operation, good sensitivity and excellent reusability, showing great potential for monitoring of water quality.
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高影响因子
RARE METALS
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2024
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IF 9.6
Wan Wen-Qiang,Liang Kai-Ming,Zhu Peng-Yu,Chen Xiang-Yu,Li Zhen-Feng,Liu Shi-Yu,Zhang Shuai,Song Yang,He Peng,Wong Yew-Hoong,Zhang Shu-Ye
Wearable, flexible devices have garnered widespread attention in the realm of human motion and life activity detection. Currently, the development of simple, green, and easily scalable methods for fabricating strain sensors still presents significant challenges. In this study, we successfully modified the surface of reduced graphene oxide (rGO) with SnCuNiIn multi-component alloy nanoparticles (MCA NPs), with an average size of 13.29 nm, utilizing a green and facile microwave heating approach. Leveraging the SnCuNiIn MCA NPs/rGO powder, we formulated a conductive ink based on water and ethylene glycol, which, when screen-printed, yielded conductive patterns with a minimum resistivity of 4.366 mΩ·cm. Strain sensors produced using this ink demonstrate exceptional performance, demonstrating favorable resistance change rates during a single bending process that meets practical application requirements, and enduring 5000 bending cycles with a resistance change of less than 5%. These sensors exhibited a high gauge factor (GF max = 52.7) and outstanding cycling stability. Lastly, strain sensors are employed to monitor human normal life activities and motion states, showcasing significant potential for application in wearable electronic products. Graphical abstract
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International Journal of Minerals Metallurgy and Materials
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2024
·Vol. 30
·期 12
·2432-2440
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IF 5.6
Cao Duanhao,Ma Xiaofeng,Zhang Yipeng,Ta La,Yang Yakun,Xu Chao,Ye Feng,Liu Jianguo
Exploring and designing a high-performance non-noble metal catalyst for hydrogen evolution reaction (HER) are crucial for the large-scale application of H 2 by water electrolysis. Here, novel catalysts with NiMo nanoparticles decorated on reduced graphene oxide (NiMo@rGO) synthesized by a two-step hydrothermal method were reported. Physical characterization results showed that the prepared NiMo@rGO-1 had an irregular lamellar structure, and the NiMo nanoparticles were uniformly dispersed on the rGO. NiMo@rGO-1 exhibited outstanding HER performance in an alkaline environment and required only 93 and 180 mV overpotential for HER in 1.0 M KOH solution to obtain current densities of −10 and −50 mA·cm − 2 , respectively. Stability tests showed that NiMo@rGO-1 had a certain operating stability for 32 h. Under the same condition, the performance of NiMo@rGO-1 can be comparable with that of commercial Pt/C catalysts at high current density. The synergistic effect between NiMo particles and lamellate graphene can remarkably promote charge transfer in electrocatalytic reactions. As a result, NiMo@rGO-1 presented the advantages of high intrinsic activity, large specific surface area, and small electrical impedance. The lamellar graphene played a role in dispersion to prevent the aggregation of nanoparticles. The prepared NiMo@rGO-1 can be used in an-ion exchange membrane water electrolysis to produce hydrogen. This study provides a simple preparation method for efficient and low-cost water electrolysis to produce hydrogen in the future.
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高影响因子
BIOELECTROCHEMISTRY
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2024
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IF 4.8
Guiyin Li,Wenzhan Li,Yu Zhou,Xiaohong Tan,Qing Huang,Jintao Liang,Zhide Zhou
Glypican-3 (GPC3) is exclusively overexpressed in most Hepatocellular carcinoma (HCC) tissue but not in normal liver tissue, making it a promising biomarker for the precise detection of HCC. In this paper, a label-free light-addressable potentiometric sensor (LAPS) decorated by platinumpalladium-hemin-reduced graphene oxide nanocomposites (PtPd@H-rGO NCs) was constructed for determination of GPC3. The GPC3 aptamer (GPC3 Apt ) and PtPd@H-rGO NCs were modified on the surface of silicon-based LAPS chip to build sensitive unit of LAPS system. A readout photocurrent elicited from a modulated light source, registers the localized surface potential change. When a bias voltage is provided to the LAPS system, the GPC3-GPC3 Apt complexes formed by the specific reaction between GPC3 and GPC3 Apt at the sensing interface can cause the sensitive membrane surface potential to change, resulting in the photocurrent-voltage (I-V) curves generate a corresponding offset response. Therefore GPC3 concentration can be determined by monitoring the potential shifts (△V). Under optimal conditions, the potential shift is linearly related to the concentration of GPC3 in the range of 0.001–3.00 μg/mL with the limit of detection (LOD) of 0.0001 μg/mL. The LAPS has a good analytical performance with good specificity, reproducibility and stability, and can be used for the detection of GPC3 in actual serum samples, which provides a broad application prospect for the combined application of LAPS and aptamers in biooassay.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Yu-Ying Xin,Li-Hong Liu,Yan Liu,Zhao-Peng Deng,Xiao-Li Cheng,Xian-Fa Zhang,Ying-Ming Xu,Li-Hua Huo,Shan Gao
The development of electrochemical dopamine (DA) sensor with anti-interfering ascorbic acid and uric acid is challenging due to the presence of their overlapping electrical signals. Herein, MoS 2 nanoflower assembled from ultrathin nanosheets were uniformly loaded on rGO substrate through one-step hydrothermal reaction. Then, the composite (MoS 2 /rGO) was modified on the surface of glassy carbon electrode (GCE) by a drop coating method, successfully assembling non-enzymatic electrochemical sensor for ultra-selective DA detection. The test results show that the MoS 2 /rGO/GCE probe exhibits good sensitivity (15.73 μA μM −1 cm −2 ), small limit of detection (13 nM) and wide range of detection (0.1 ∼ 110.0 μM) for DA in 0.1 M PBS medium (pH = 7.4), as well as good interference resistance, reproducibility and stability. This excellent sensing ability mainly stems from the synergistic effect of the prepared electrode material with abundant edge defects, small charge transfer resistance, large electrochemically active area, and more negative Zeta potential (–23.4 mV). Furthermore, the satisfactory and accurate detection of DA content in animal serums predicts its potential for practical applications in related biological aspects.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Shunxiang Wang,Sen Hu,Cuili Xiang,Yongjin Zou,Fen Xu,Ningbo Qin,Lixian Sun
Pt/C is currently widely utilized as a catalyst for electrolytic hydrogen production. However, the high cost of Pt-based catalysts limits further development. Therefore, developing an efficient, highly stable, and cost-effective catalyst is crucial. In this study, we enhanced the ability to activate H 2 O and the performance of the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) by incorporating a small amount of Ru into NiFeAl-layered double hydroxides (LDHs), thereby altering the electrochemical active surface area and the catalysts’ internal resistance. The catalyst demonstrated excellent catalytic activity in alkaline electrolytes, achieving low overpotentials of 33 mV at 10 mA cm −2 and 278 mV at 50 mA cm −2 . Furthermore, it demonstrated outstanding stability for up to 240 h; the catalyst was successfully assembled into a solar-powered hydrogen production system via full-water-splitting testing, thus providing more possibilities for electrolytic hydrogen production.
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高影响因子
Catalysis Science & Technology
·
2025
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IF 4.2
Yuangong Ma,Youlin Huang,Wensheng Zhang,Zhishan Liang,Bo Ding,Dongfang Han,Dongxue Han,Li Niu
In the domain of photocatalysis, harnessing solar energy, particularly the near-infrared (NIR) spectrum, presents formidable challenges. To overcome these, a novel NIR-responsive photocatalyst, denoted as NYT@ZnO@RGO@Ag, was meticulously crafted. This photocatalyst comprises a NaYF4: Yb3+, Tm3+@ZnO structure supported on reduced graphene oxide (RGO) and further composited with silver nanoparticles. It was rigorously evaluated for its performance in photodegrading tetracycline (TC) antibiotics as a model compound. Leveraging the unique properties of upconversion materials, wide bandgap semiconductors, and localized surface plasmon resonance (LSPR), the NYT@ZnO@RGO@Ag catalyst exhibited an impressive photodegradation rate of 93.6% for TC under NIR light exposure. This efficiency surpassed that of NYT@ZnO (38.2%) and NYT@ZnO@RGO (72.3%). The remarkable enhancement in NIR-driven photocatalysis observed in NYT@ZnO@RGO@Ag is primarily attributed to the efficient process of fluorescence resonance energy transfer (FRET) from NYT to its each component. This process enhances photo-induced carrier generation and facilitates efficient transfer and energy utilization under NIR irradiation. The present study offers a promising approach for NIR-driven photocatalytic degradation of pollutants in environments with limited light exposure or even under dark conditions.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
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IF 4.439
Jie Ni,Jinjuan Xue,Jing Shen,Guangyu He,Haiqun Chen
The ZnAl mixed metal-oxides (MMOs)/graphene nanocomposites were successfully fabricated by a facile hydrothermal method combined with a calcination process. The thermal treatment enables simultaneously the formation of ZnO/ZnAl 2 O 4 heterogeneous structure, which are uniformly decorated on the surface of graphene, accompanying with the reduction of graphene oxide. The as-prepared heterostructure photocatalysts were well characterized by powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and UV–vis diffuse reflectance spectroscopy (DRS) to conduct investigations into the phase structures, microstructure and optical capability. The ZnAl MMO/RGO 20 composite displayed favorable adsorption property and photo-degradation efficiency for Ciprofloxacin (CIP) aqueous solution under visible light. The photo-degradation efficiency of the as-prepared ZnAl MMO/RGO 20 was 3.0 and even 4.6 times higher than that of ZnAl MMO and pure ZnAl LDH, respectively. The improvement of photocatalytic performance is ascribed to the synergistic effect of heterogeneous structure coupled with graphene, which realizes efficient charge separation efficiency, enlarged visible light adsorption range, and chemical stability of hybrid nanocomposite. The results of EIS, PL and photocurrent response also explained the best performance of ZnAl MMO/RGO 20 nanocomposite. Besides, the mechanism of ZnAl MMO/RGO 20 photocatalytic system was proposed and analyzed in detail.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Shuang Wang,Maoxiang Liu,Shanshan He,Shupeng Zhang,Xuchu Lv,Haiou Song,Jun Han,Duozhe Chen
A novel electrochemical nitrite (NaNO 2 ) sensor is fabricated by combining Fe 2 O 3 with protonated carbon nitride (H C 3 N 4 ) and reduced graphene oxide (rGO). The smaller H C 3 N 4 is distributed uniformly on the surface of the rGO support and acts as a nucleation site for the growth of Fe 2 O 3 . Conductive H C 3 N 4 is a nano-bridge to connect and uniformly distribute Fe 2 O 3 , a catalytic center, to the support rGO to enhance the electrocatalytic performance. The Fe 2 O 3 /H C 3 N 4 /rGO electrode possesses high sensitivity of 0.04874 μA μM −1 , wide linear response range spanning 25 nM to 3000 μM, a low detection limit of 18.55 nM (S/N = 3) and shows high selectivity for nitrite in the presence of common organic and inorganic interfering species (like NaCl, MgSO 4 , KNO 3 , ZnSO 4 , CaCl 2 , glucose, urea), fulfilling requirements for a nitrite sensor used in commercial applications.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Deyang Ning,Junshan Zhang,Arun Murali,Yuanpei Lan,Chaoyi Chen,Shaoyan Yang,Wei Zhang,Junqi Li
In this work, a novel nitrogen-doped reduced graphene oxide-ceria (N-doped rGO-CeO 2 ) photocatalyst was successfully synthesized and exhibited a notable capability in degrading various organic pollutants . Among the synthesized samples, rGO-CeO 2 -900 N 2 demonstrated the most efficient photocatalytic activity , achieving a 77.43% degradation rate for tetracycline (TC) fitting the modified Elovich model ( R 2 = 0.99). The CeO 2 addition can increase defects and amorphous carbon species in rGO in Raman spectra . The rGO adding and N doping can contribute to more effective separation of photo-excited electrons/holes ( e - /h + ) and a faster rate of charge transfer via the results of photochemical tests. With the combination between rGO and CeO 2 , the N doped rGO-CeO 2 catalyst gains certain anti-H + ability in TC degradation and more·O 2 - can be generated under light, while the N doping can form an impurity level N 2p in CeO 2 and create additional reactive sites on the rGO. This N doped rGO-CeO 2 photocatalyst is well-suited for the harmless degradation and offers significant potential in wastewater treatment and pollution control.
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