RSC Advances
·
2017
·Vol. 7
·期 86
·54806-54812
·
IF 3.108
Shaoyi Lyu,Yanping Chen,Shenjie Han,Limin Guo,Na Yang,Siqun Wang
We herein report the use of natural sliced wood veneer as a porous lightweight substrate for supercapacitor composite electrodes, where polyaniline/reduced graphene oxide (PANI/RGO) and polypyrrole/reduced graphene oxide (PPy/RGO) were employed as the complex electroactive materials, and were prepared using physical deposition and in situ polymerisation methods. Owing to the hierarchical cellular structure, penetrating channels, and hydrophilic character of the natural wood substrate, both wood electrodes displayed unique morphologies and exhibited high specific capacitances, good capacitance retention, and good cycling stabilities. More specifically, the as-designed PANI/RGO wood and PPy/RGO wood electrodes gave high gravimetric specific capacitances of 931.92 and 848.01 F g−1, respectively, at a current density of 2.5 mA cm−2 in a three-electrode test. In addition, the assembled symmetric supercapacitors showed good areal specific capacitances of 0.89 and 0.78 F cm−2, respectively, at a sweep rate of 1 mV s−1 in addition to high areal specific energies of 107.70 and 86.96 mW h cm−2, respectively, at an areal specific power of 0.25 mW cm−2. Our results indicate that the use of natural wood as a substrate for supercapacitor electrodes will be an important contribution to the development of green and renewable energy storage devices.
研究领域:
材料科学
·
能源存储技术
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DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2015
·Vol. 117
·期 8
·
IF 2.183
He Hongcai,Luo Feifei,Qian Neng,Wang Ning
Three-phase composites of poly(vinylidene fluoride)-BaFe 12 O 19 -reduced graphene oxide (PVDF–BFO-RGO) were synthesized by a facile wet chemical method and hot-pressing approach. The phase structure, topography of the hybrid materials were characterized by X-ray diffraction, scanning electron microscopy, and Raman spectra. Influence of RGO on their electromagnetic properties was investigated. Especially, improved microwave absorption and electromagnetic properties of BaFe 12 O 19 –PVDF composites by incorporating RGO were obtained and studied. The PVDF/BFO/RGO sample with m(RGO):m(BFO) = 5:100 shows the best microwave absorption properties with a minimum RL = −32 dB at 11 GHz and with the bandwidth less than −20 dB from 9.6 to 12.8 GHz. The composites were believed to have potential applications as the microwave absorber.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Yanfang Wang,Dongliang Chen,Xiong Yin,Peng Xu,Fan Wu,Meng He
Electromagnetic wave absorbing materials that can exhibit effective absorption in a broad bandwidth at a thin thickness are strongly desired due to their widespread applications in electronic devices. In this study, hybrids of MoS2 and reduced graphene oxide (RGO) were prepared and their microwave absorption performance was investigated for the first time. It was found that a thin sample consisting of 10 wt % MoS2/RGO hybrid in the wax matrix exhibited an effective microwave absorption bandwidth of 5.72 GHz at the thickness less than 2.0 mm. The highest reflection loss of −50.9 dB was observed at 11.68 GHz for a sample with a thickness of 2.3 mm. Results obtained in this study indicate that hybrids of MoS2 and RGO are promising microwave absorbing materials, which can exhibit broad effective absorption bandwidth at low filler loading and thin thickness.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemosensors
·
2021
·Vol. 9
·期 8
·190
·
IF 3.398
Chengling Qu,He Li,Shuang Zhou,Guodong Li,Cheng Wang,Rony Snyders,Carla Bittencourt,Wenjiang Li
The engineering of an efficient electrochemical sensor based on a bismuth sulfide/reduced graphene oxide (Bi2S3/rGO) composite to detect ascorbic acid (AA) is reported. The Bi2S3nanorods/rGO composite was synthesized using a facile hydrothermal method. By varying the amount of graphene oxide (GO) added to the synthesis, the morphology and size of Bi2S3nanorods anchored on the surface of rGO can be tuned. Compared to a bare glassy carbon electrode (GCE), the GCE modified with Bi2S3/rGO composite presented enhanced electrochemical performance, which was attributed to the optimal electron transport between the rGO support and the loaded Bi2S3as well as to an increase in the number of active catalytic sites. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis of Bi2S3/rGO/GCE demonstrate that the active Bi2S3/rGO layer on GCE plays an important role in the electrochemical behavior of the sensor. In particular, the Bi2S3/rGO/GCE sensor shows a wide detecting range (5.0–1200 μM), low detection limit (2.9 µM), good sensitivity (268.8 μA mM−1cm−2), and sufficient recovery values (97.1–101.6%) for the detection of ascorbic acid.Keywords:Bi2S3;reduced graphene oxide;ascorbic acid;electrochemical sensor
研究领域:
材料科学
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分析化学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Li Qun Xu,Yan Biao Liao,Ning Ning Li,Yi Jian Li,Jie Yu Zhang,Yun Bing Wang,Xue Feng Hu,Chang Ming Li
Chemical reduction of graphene oxide (GO) is a simple and inexpensive method for the large-scale production of graphene-based materials. A suitable reducing agent, especially a green reductant, is in high demand for the production of reduced GO (RGO). Vancomycin, a glycopeptide antibiotic used to treat a variety of Gram-positive bacterial infections, was used to chemically reduce GO at a weak alkaline pH. As far as we know, this is the first report of reduction of GO by a glycopeptide antibiotic. The resulting vancomycin-decorated RGO (RGO-Van) was characterized by UV–visible adsorption and Raman spectroscopies, X-ray diffraction pattern and atomic force microscopy (AFM). The antibacterial effect of the RGO-Van suspension was investigated by the bacterial growth curves. The RGO-Van sheet can be fabricated into paper-like film through vacuum filtration. The antibacterial property of the as-obtained RGO-Van film was assessed by the inhibition zone test, and the bacterial adhesion assay. The antibacterial efficacy of the RGO-Van film was also verified by treatment of wound infection caused by Staphylococcus aureus ( S. aureus ) in a rat infection model.
研究领域:
材料科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2021
·Vol. 50
·期 28
·9796-9803
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IF 4.39
Yanyan Wu,Jing Dong,Chengpeng Liu,Xiaoting Jing,Huifang Liu,Yue Guo,Yingnan Chi,Changwen Hu
Keggin-type polyoxometalates (POMs) were immobilized on poly(diallyldimethylammonium chloride) (PDDA) functionalized reduced graphene oxide (rGO) by a facile and broad-spectrum hydrothermal method. The prepared POMs@PDDA-rGO composites (POM = H3PMo12O40, H3PW12O40, H5PMo10V2O40) have been thoroughly characterized using a series of techniques. The three composites can catalyze the oxidative decontamination of a sulfur mustard simulant, 2-chloroethyl ethyl sulfide (CEES) in the order of PMo12@PDDA-rGO > PMo10V2@PDDA-rGO > PW12@PDDA-rGO. Notably, under ambient conditions PMo12@PDDA-rGO can convert 99% of CEES within 30 min in the presence of nearly stoichiometric aqueous H2O2 (3 wt%) and its catalytic activity is significantly higher than that of homogeneous H3PMo12O40. XPS spectral analysis and control experiments indicate that the Mo center of POM is reduced from +6 to +5 during the hydrothermal process, and the excellent catalytic performance is related to the reduction of Mo. Moreover, the PMo12@PDDA-rGO composite is stable during the decontamination process and it can be used for at least five cycles without loss of activity.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2015
·
IF 1.964
Yanyan Xu,Mingming Gao,Guohui Zhang,Xinhua Wang,Jiajia Li,Shuguang Wang,Yuanhua Sang
An electrochemically reduced graphene oxide sample, ERGO -0.8V , was prepared by electrochemical reduction of graphene oxide (GO) at –0.8 V, which shows unique electrocatalytic activity toward tetracycline (TTC) detection compared to the ERGO -1.2V (GO applied to a negative potential of –1.2 V), GO, chemically reduced GO (CRGO)-modified glassy carbon electrode (GC) and bare GC electrodes. The redox peaks of TTC on an ERGO -0.8V -modified glass carbon electrode (GC/ERGO -0.8V ) were within 0–0.5 V in a pH 3.0 buffer solution with the oxidation peak current correlating well with TTC concentration over a wide range from 0.1 to 160 mg/L. Physical characterizations with Fourier transform infrared (FT-IR), Raman, and X-ray photoelectron spectroscopies (XPS) demonstrated that the oxygen-containing functional groups on GO diminished after the electrochemical reduction at –0.8 V, yet still existed in large amounts, and the defect density changed as new sp 2 domains were formed. These changes demonstrated that this adjustment in the number of oxygen-containing groups might be the main factor affecting the electrocatalytic behavior of ERGO. Additionally, the defect density and sp 2 domains also exert a profound influence on this behavior. A possible mechanism for the TTC redox reaction at the GC/ERGO -0.8V electrode is also presented. This work suggests that the electrochemical reduction is an effective method to establish new catalytic activities of GO by setting appropriate parameters.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Food Analytical Methods
·
2018
·Vol. 12
·期 3
·644-651
·
IF 2.245
Luo Dan,Zhao Xiaoshuang,Zheng Yiliang,Ma Yaolu,Cun Fei,Ye Jiannong,Chu Qingcui
A gold nanoparticle/reduced graphene oxide composite electrode (AuNP/rGO) was fabricated for the determination of the main bioamines and their precursor amino acids in beer based on a miniaturized capillary electrophoresis with amperometric detection system (mini-CE-AD). The surface morphology and structure of the synthetic AuNP/rGO material were observed by scanning electron microscope, energy dispersive X-ray spectroscope, X-ray diffraction, and Fourier transform infrared spectroscopy. The analytical performance of the composite electrode was verified by cyclic voltammetry and mini-CE-AD approaches. Four target analytes were separated within 7 min in 50 mM Na 2 B 4 O 7 -NaOH buffer (pH 9.35) at a separation voltage of 3 kV. This developed method has been applied to the beer samples, and acceptable recovery could be obtained ranging from 84.5 to 108%. The assay results indicated that this AuNP/rGO composite electrode has the advantages of simple preparation, low working potential (+ 0.65 V vs. SCE), good sensitivity (0.13~0.87 μM), and satisfactory reproducibility. This proposed method provides an alternative for rapid analysis of food safety.
研究领域:
分析化学
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食品安全
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Zicheng Li,Yingkui Guo,Hongyan Yue,Xin Gao,Shuo Huang,Xiaohua Zhang,Yanfei Yu,Haopeng Zhang,Hengwei Zhang
EP is an important natural catecholamine neurotransmitter in the central nervous system, and the change of EP concentration will lead to many diseases. Therefore, rapid and sensitive detection of EP is of great significance for clinical research. The Ti 3 C 2 T x MXene dispersion obtained by in-situ HF etching Ti 3 AlC 2 was mixed with graphene oxide (GO) dispersion synthesized by the modified Hummers method. After freeze drying and heat-treatment, the reduced graphene oxide/Ti 3 C 2 T x MXene (GMA) was obtained and then the GMA was moved onto indium tin oxide (ITO) as the GMA/ITO working electrode for electrochemical detection of epinephrine (EP). The results are as follows: Ti 3 C 2 T x MXene with a diameter of approximately 150 nm is uniformly distributed on the surface of the 3D graphene. The three-dimensional structure of GMA facilitates the entry of bioactive molecules and increases the contact area. GMA/ITO has a high sensitivity for the determination of EP 3.74 μA·μM −1 ·cm −2 . Moreover, the electrode shows a very low detection limit, well repeatability and stability, and it can detect the EP content in real urine samples.
研究领域:
生物医学工程
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神经科学
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材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 23
·18444
·
IF 4.6
Sanoober Bhagat,Sana-ul-Nisa,Tania Ghumro,Jamil A Buledi,Amber R Solangi,S Tufail H Sherazi
The current study uses the ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate, also known as BMIM-PF 6 , as a stabilizing agent to synthesize a bismuth oxide/ionic liquid/reduced graphene oxide (Bi 2 O 3 /IL/rGO) hybrid nanomaterial. A range of techniques, including scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), and UV-visible spectroscopy, were used to characterize the synthesized Bi 2 O 3 /IL/rGO nanocomposite. XRD confirmed that the composite was crystalline, and FTIR analysis suggested the presence of certain functional groups. The main elements oxygen, carbon, and bismuth were confirmed by EDX analysis, and SEM imaging showed an exfoliated and detached morphology. The synthesized nanocomposite was used to modify a glassy carbon electrode to develop a sensor for the detection of lead (Pb 2+ ). The fabricated sensor was characterized using electrochemical impendence spectroscopy (EIS) and cyclic voltammetry (CV). The results indicated that the Bi 2 O 3 /IL/rGO/GCE was more conductive, having a charge transfer resistance ( R ct ) of 428.5 Ω compared to 1870 Ω for the bare electrode. The sensor has a low detection limit of 0.001 μM and a quantification limit of 0.003 μM. When tested on water and soil samples, the sensor was confirmed to have acceptable recovery rates, ranging from 95% to 102%. In conclusion, our fabricated sensor has excellent performance in terms of ease, affordability, energy usage, and quick efficiency. The ionic liquid BMIM-PF 6 was used as stabilizing agent to synthesize Bi 2 O 3 /IL/rGO hybrid nanocomposite. A sensor was developed by modifying the surface of GCE by using hybrid nanocomposite for the detection of Pb 2+ in environmental samples.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2018
·Vol. 30
·期 5
·842-851
·
IF 2.851
Meiling Wang,Mingzhu Cui,Weifeng Liu,Xuguang Liu,Bingshe Xu
Here, a facile reduction approach for synthesis of β-cyclodextrin functionalized reduced graphite oxide with the aid of ionic liquid (βCD/IRGO) was reported. This strategy relies on the simple mixing of pre-pared aqueous βCD/GO with ionic liquid (IL) at high temperatures, which can bring about a well dispersed βCD/RGO in the utilized IL (βCD/IRGO) with a synchronous evaporation of water. The as-prepared βCD/IRGO product can be stably re-dispersed in water (up to 1.0 mg/mL) after washed and dried. And the presented βCD/IRGO composites possess high supramolecular recognition capability and good conductivity for realizing enhanced electrochemical response towards simultaneous detection of guanine and adenine compared with other βCD/carbon (RGO or carbon nanotube) based composites. In the presence of one of analysts, the linear response ranges is 0.03–10.0 μM for guanine and 0.02–7.0 μM for adenine, respectively, with detection limit of 0.01 μM for both guanine and adenine (S/N=3). This ease of making the βCD/IRGO composite will open up possibilities of its diversifier applications.
研究领域:
材料科学
·
电化学分析
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Cheng-Lu Liang,Yang Liu,Rui-Ying Bao,Yong Luo,Wei Yang,Bang-Hu Xie,Ming-Bo Yang
Well dispersed Fe 3 O 4 nanoparticle suspensions with grain size of about 9 nm were coprecipitated and then compounded with different amount of GO (graphite oxide) followed by reduction of GO to obtain Fe 3 O 4 /rGO (reduced graphite oxide) composites with different component ratios. The as-obtained Fe 3 O 4 /rGO composites were used as anode materials for lithium ion batteries to investigate the best component ratio of the composite for the cycling performance. Fe 3 O 4 /rGO composite electrode containing 44.9 wt% Fe 3 O 4 displayed the best cycling capacity of above 300 mA h g −1 at 1000 mA g −1 after 100 cycles and it was interesting to find that the trend of impedance spectra of Fe 3 O 4 /rGO electrodes after some cycles of electrochemical reactions can be well related to the overall cycling performances.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）