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1.
Hybrid Fibers Made of Molybdenum Disulfide,Reduced Graphene Oxide,and Multi‐Walled Carbon Nanotubes for Solid‐State,Flexible, Asymmetric Supercapacitors
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Dr. Gengzhi Sun Xiao Zhang Rongzhou Lin Jian Yang Prof. Hua Zhang Prof. Peng Chen 《Angewandte Chemie (International ed. in English)》2015,54(15):4651-4656
One of challenges existing in fiber‐based supercapacitors is how to achieve high energy density without compromising their rate stability. Owing to their unique physical, electronic, and electrochemical properties, two‐dimensional (2D) nanomaterials, e.g., molybdenum disulfide (MoS2) and graphene, have attracted increasing research interest and been utilized as electrode materials in energy‐related applications. Herein, by incorporating MoS2 and reduced graphene oxide (rGO) nanosheets into a well‐aligned multi‐walled carbon nanotube (MWCNT) sheet followed by twisting, MoS2‐rGO/MWCNT and rGO/MWCNT fibers are fabricated, which can be used as the anode and cathode, respectively, for solid‐state, flexible, asymmetric supercapacitors. This fiber‐based asymmetric supercapacitor can operate in a wide potential window of 1.4 V with high Coulombic efficiency, good rate and cycling stability, and improved energy density. 相似文献
2.
Prof. Mehdi D. Esrafili Ramin Mohammad‐Valipour Prof. Seyed Morteza Mousavi‐Khoshdel Parisa Nematollahi 《Chemphyschem》2015,16(17):3719-3727
The geometry, electronic structure, and catalytic properties of nitrogen‐ and phosphorus‐doped graphene (N‐/P‐graphene) are investigated by density functional theory calculations. The reaction between adsorbed O2 and CO molecules on N‐ and P‐graphene is comparably studied via Langmuir–Hinshelwood (LH) and Eley–Rideal (ER) mechanisms. The results indicate that a two‐step process can occur, namely, CO+O2→CO2+Oads and CO+Oads→CO2. The calculated energy barriers of the first step are 15.8 and 12.4 kcal mol?1 for N‐ and P‐graphene, respectively. The second step of the oxidation reaction on N‐graphene proceeds with an energy barrier of about 4 kcal mol?1. It is noteworthy that this reaction step was not observed on P‐graphene because of the strong binding of Oads species on the P atoms. Thus, it can be concluded that low‐cost N‐graphene can be used as a promising green catalyst for low‐temperature CO oxidation. 相似文献
3.
Synthesis of Phosphorus‐Doped Graphene and its Wide Potential Window in Aqueous Supercapacitors
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Yangyang Wen Dr. Bei Wang Congcong Huang Prof. Lianzhou Wang Dr. Denisa Hulicova‐Jurcakova 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(1):80-85
Phosphorus‐doped (P‐doped) graphene with the P doping level of 1.30 at % was synthesized by annealing the mixture of graphene and phosphoric acid. The presence of P was confirmed by elemental mapping and X‐ray photoelectron spectroscopy, while the morphology of P‐doped graphene was revealed by using scanning electron microscopy and transmission electron microscopy. To investigate the effect of P doping, the electrochemical properties of P‐doped graphene were tested as a supercapacitor electrode in an aqueous electrolyte of 1 M H2SO4. The results showed that doping of P in graphene exhibited significant improvement in terms of specific capacitance and cycling stability, compared with undoped graphene electrode. More interestingly, the P‐doped graphene electrode can survive at a wide voltage window of 1.7 V with only 3 % performance degradation after 5000 cycles at a current density of 5 A g?1, providing a high energy density of 11.64 Wh kg?1 and a high power density of 831 W kg?1. 相似文献
4.
《Electroanalysis》2018,30(8):1791-1800
We report the effect of electrochemical anodization on the properties of monolayer graphene as the main aim of this research and consequently using the resulting label‐free impedimetric biosensor for DNA sequences detection. Monolayer graphene was grown by chemical vapor deposition (CVD) with methane as precursor on copper foil, transferred onto a glassy carbon electrode and electrochemically anodized. Raman spectroscopy and X‐Ray photo electron spectroscopy revealed enhancement of defect density, roughness and formation of C−O−C, C−O−H and C=O functional groups after anodization. Amine‐terminated poly T probe was linked covalently to the carboxylic groups of anodized graphene by the zero‐length linker to fabricate the impedance‐based DNA biosensor. The anodized graphene electrode demonstrated a superior performance for electrochemical impedance detection of DNA. The DNA biosensor showed a large linear dynamic range from 2.0×10−18 to 1.0×10−12 M with a limit of detection of 1.0×10−18 M using electrochemical impedance spectroscopy (EIS) method. Equivalent circuit modeling shows that DNA hybridization is detected through a change in charge transfer resistance. 相似文献
5.
Feng Zou Prof. Xianluo Hu Dr. Yongming Sun Dr. Wei Luo Fangfang Xia Long Qie Yan Jiang Prof. Yunhui Huang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2013,19(19):6027-6033
Zn2GeO4/N‐doped graphene nanocomposites have been synthesized through a fast microwave‐assisted route on a large scale. The resulting nanohybrids are comprised of Zn2GeO4 nanorods that are well‐embedded in N‐doped graphene sheets by in situ reducing and doping. Importantly, the N‐doped graphene sheets serve as elastic networks to disperse and electrically wire together the Zn2GeO4 nanorods, thereby effectively relieving the volume‐expansion/contraction and aggregation of the nanoparticles during charge and discharge processes. We demonstrate that an electrode that is made of the as‐formed Zn2GeO4/N‐doped graphene nanocomposite exhibits high capacity (1463 mAh g?1 at a current density of 100 mA g?1), good cyclability, and excellent rate capability (531 mAh g?1 at a current density of 3200 mA g?1). Its superior lithium‐storage performance could be related to a synergistic effect of the unique nanostructured hybrid, in which the Zn2GeO4 nanorods are well‐stabilized by the high electronic conduction and flexibility of N‐doped graphene sheets. This work offers an effective strategy for the fabrication of functionalized ternary‐oxide‐based composites as high‐performance electrode materials that involve structural conversion and transformation. 相似文献
6.
Dr. Tae‐Hee Han Sung‐Joo Kwon Dr. Nannan Li Hong‐Kyu Seo Dr. Wentao Xu Prof. Kwang S. Kim Prof. Tae‐Woo Lee 《Angewandte Chemie (International ed. in English)》2016,55(21):6197-6201
We report effective solution‐processed chemical p‐type doping of graphene using trifluoromethanesulfonic acid (CF3SO3H, TFMS), that can provide essential requirements to approach an ideal flexible graphene anode for practical applications: i) high optical transmittance, ii) low sheet resistance (70 % decrease), iii) high work function (0.83 eV increase), iv) smooth surface, and iv) air‐stability at the same time. The TFMS‐doped graphene formed nearly ohmic contact with a conventional organic hole transporting layer, and a green phosphorescent organic light‐emitting diode with the TFMS‐doped graphene anode showed lower operating voltage, and higher device efficiencies (104.1 cd A?1, 80.7 lm W?1) than those with conventional ITO (84.8 cd A?1, 73.8 lm W?1). 相似文献
7.
Self‐Assembling Synthesis of Free‐standing Nanoporous Graphene–Transition‐Metal Oxide Flexible Electrodes for High‐Performance Lithium‐Ion Batteries and Supercapacitors
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The synthesis of nanoporous graphene by a convenient carbon nanofiber assisted self‐assembly approach is reported. Porous structures with large pore volumes, high surface areas, and well‐controlled pore sizes were achieved by employing spherical silica as hard templates with different diameters. Through a general wet‐immersion method, transition‐metal oxide (Fe3O4, Co3O4, NiO) nanocrystals can be easily loaded into nanoporous graphene papers to form three‐dimensional flexible nanoarchitectures. When directly applied as electrodes in lithium‐ion batteries and supercapacitors, the materials exhibited superior electrochemical performances, including an ultra‐high specific capacity, an extended long cycle life, and a high rate capability. In particular, nanoporous Fe3O4–graphene composites can deliver a reversible specific capacity of 1427.5 mAh g?1 at a high current density of 1000 mA g?1 as anode materials in lithium‐ion batteries. Furthermore, nanoporous Co3O4–graphene composites achieved a high supercapacitance of 424.2 F g?1. This work demonstrated that the as‐developed freestanding nanoporous graphene papers could have significant potential for energy storage and conversion applications. 相似文献
8.
Jiyang Liu Lei Han Tianshu Wang Wei Hong Dr. Yaqing Liu Prof. Erkang Wang 《化学:亚洲杂志》2012,7(12):2824-2829
A new nanocomposite material for enzyme immobilization and subsequent direct electrochemistry and electrocatalysis was developed by using 1,2‐dimyristoyl‐sn‐glycero‐3‐phospho‐(1‐rac‐glycerol)‐phospholipid‐monolayer‐membrane‐modified graphene (DMPG‐G). Microperoxidase‐11 (MP11) was chosen as a model enzyme to investigate the composite system. Owing to the improved conductivity and biocompatible microenvironment, MP11 that was immobilized in the matrix of the DMPG‐G nanocomposite (DMPG‐G‐MP11) effectively retained its native structure and bioactivity. DMPG‐G‐MP11‐modified glassy carbon electrode (DMPG‐G‐MP11/GCE) exhibited a pair of well‐defined quasi‐reversible redox peaks of MP11 and showed high electrocatalytic activity towards hydrogen peroxide (H2O2). The linear response of the developed biosensor for the determination of H2O2 ranged from 2.0×10?6 to 4.5×10?4 M with a detection limit of 7.2×10?7 M . This biosensor exhibited high reproducibility and long‐term storage stability. The promising features of this biosensor indicate that these lipid–graphene nanocomposites are ideal candidate materials for the direct electrochemistry of redox proteins and that they could serve as a versatile platform for the construction of a third‐generation biosensor. 相似文献
9.
《Electroanalysis》2017,29(9):2083-2089
A facile and green electrochemical method for the fabrication of three‐dimensional porous nitrogen‐doped graphene (3DNG) modified electrode was reported. This method embraces two consecutive steps: First, 3D graphene/polypyrrole (ERGO/PPy) composite was prepared by electrochemical co‐deposition of graphene and polypyrrole on a gold foil. Subsequently, the ERGO/PPy composite modified gold electrode was annealed at high temperature. Thus 3DNG modified electrode was obtained. Scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS) and Raman spectroscopy were used to characterize the structure and morphology of the electrode. The electrode exhibits excellent electroanalytical performance for the reduction of hydrogen peroxide (H2O2). By linear sweep voltammetric measurement, the cathodic peak current was linearly proportional to H2O2 concentration in the range from 0.6 μM to 2.1 mM with a sensitivity of 1.0 μA μM−1 cm−2. The detection limit was ascertained to be 0.3 μM. The anti‐interference ability, reproducibility and stability of the electrode were carried out and the electrode was applied to the detection of H2O2 in serum sample with recoveries from 98.4 % to 103.2 %. 相似文献
10.
Gengzhi Sun Xiao Zhang Rongzhou Lin Jian Yang Hua Zhang Peng Chen 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2015,127(15):4734-4739
One of challenges existing in fiber‐based supercapacitors is how to achieve high energy density without compromising their rate stability. Owing to their unique physical, electronic, and electrochemical properties, two‐dimensional (2D) nanomaterials, e.g., molybdenum disulfide (MoS2) and graphene, have attracted increasing research interest and been utilized as electrode materials in energy‐related applications. Herein, by incorporating MoS2 and reduced graphene oxide (rGO) nanosheets into a well‐aligned multi‐walled carbon nanotube (MWCNT) sheet followed by twisting, MoS2‐rGO/MWCNT and rGO/MWCNT fibers are fabricated, which can be used as the anode and cathode, respectively, for solid‐state, flexible, asymmetric supercapacitors. This fiber‐based asymmetric supercapacitor can operate in a wide potential window of 1.4 V with high Coulombic efficiency, good rate and cycling stability, and improved energy density. 相似文献
11.
《中国化学会会志》2017,64(7):860-868
One‐pot electrodeposited copper‐graphene (Cu‐GE ) nanocomposite acting as sacrificial template for the division electrosynthesis of palladium nanoparticles (PdNPs ) on pyrolytic graphite electrode (PGE ) was synthesized. The designed PdNPs‐GE nanocomposite was evaluated as a new material for highly sensitive determination of hydrazine (N2H4 ). Scanning electron microscopy revealed that the PdNP‐GE ‐modified PGE had uniform morphology. The results of energy‐dispersive X‐ray spectrograms confirmed the ingredients of the division electrosynthesis process. Electrochemical experiments were performed to characterize the sensing properties of PdNPs‐GE toward the electrocatalytic oxidation of N2H4 at 0.20 V in sodium phosphate buffered saline (0.1 M pH 7.0). The sensor showed fast response (<3 s), high sensitivity [398 (1 × 10−6 A) (1 × 10−3 M)−1], and broad linearity in the range 2.5 × 10−8–2.7 × 10−4 M with a relatively low detection limit of 1.0 × 10−8 M (S/N = 3). 相似文献
12.
Microwaves (MWs) are applied to initialize deoxygenation of graphene oxide (GO) in the solid state and at low temperatures (~165 °C). The Fourier‐transform infrared (FTIR) spectra of MW‐reduced graphene oxide (rGO) show a significantly reduced concentration of oxygen‐containing functional groups, such as carboxyl, hydroxyl and carbonyl. X‐ray photoelectron spectra confirm that microwaves can promote deoxygenation of GO at relatively low temperatures. Raman spectra and TGA measurements indicate that the defect level of GO significantly decreases during the isothermal solid‐state MW‐reduction process at low temperatures, corresponding to an efficient recovery of the fine graphene lattice structure. Based on both deoxygenation and defect‐level reduction, the resurgence of interconnected graphene‐like domains contributes to a low sheet resistance (~7.9×104 Ω per square) of the MW‐reduced GO on SiO2‐coated Si substrates with an optical transparency of 92.7 % at ~547 nm after MW reduction, indicating the ultrahigh efficiency of MW in GO reduction. Moreover, the low‐temperature solid‐state MW reduction is also applied in preparing flexible transparent conductive coatings on polydimethylsiloxane (PDMS) substrates. UV/Vis measurements indicate that the transparency of the thus‐prepared MW‐reduced GO coatings on PDMS substrates ranges from 34 to 96 %. Correspondingly, the sheet resistance of the coating ranges from 105 to 109 Ω per square, indicating that MW reduction of GO is promising for the convenient low‐temperature preparation of transparent conductors on flexible polymeric substrates. 相似文献
13.
Anawat Thivasasith Dr. Jakkapan Sirijaraensre Dr. Pipat Khongpracha Dr. Chompunuch Warakulwit Dr. Bavornpon Jansang Prof. Dr. Jumras Limtrakul 《Chemphyschem》2015,16(5):986-992
We employed periodic DFT calculations (PBE‐D2) to investigate the catalytic conversion of methanol over graphene embedded with Fe and FeO. Two possible pathways of dehydrogenation to formaldehyde and dehydration to dimethyl ether (DME) over these catalysts were examined. Both processes are initiated with the activation of methanol over the catalytic center through O?H cleavage. As a result, a methoxo‐containing intermediate is formed. Subsequently, H‐transfer from the methoxy to the adjacent ligand leads to the formation of formaldehyde. Conversely, the activation of the second methanol over the intermediate gives DME and H2O. Over Fe/graphene, the dehydration process is kinetically and thermodynamically preferable. Unlike Fe/graphene, FeO/graphene is predicted to be an efficient catalyst for the dehydrogenation process. Oxidative dehydrogenation over FeO/graphene takes place through two steps with free energy barriers of 5.7 and 10.2 kcal mol?1. 相似文献
14.
High‐Performance Sodium‐Ion Batteries and Sodium‐Ion Pseudocapacitors Based on MoS2/Graphene Composites
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Yun‐Xiao Wang Dr. Shu‐Lei Chou Dr. David Wexler Prof. Hua‐Kun Liu Prof. Shi‐Xue Dou 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(31):9607-9612
Sodium‐ion energy storage, including sodium‐ion batteries (NIBs) and electrochemical capacitive storage (NICs), is considered as a promising alternative to lithium‐ion energy storage. It is an intriguing prospect, especially for large‐scale applications, owing to its low cost and abundance. MoS2 sodiation/desodiation with Na ions is based on the conversion reaction, which is not only able to deliver higher capacity than the intercalation reaction, but can also be applied in capacitive storage owing to its typically sloping charge/discharge curves. Here, NIBs and NICs based on a graphene composite (MoS2/G) were constructed. The enlarged d‐spacing, a contribution of the graphene matrix, and the unique properties of the MoS2/G substantially optimize Na storage behavior, by accommodating large volume changes and facilitating fast ion diffusion. MoS2/G exhibits a stable capacity of approximately 350 mAh g?1 over 200 cycles at 0.25 C in half cells, and delivers a capacitance of 50 F g?1 over 2000 cycles at 1.5 C in pseudocapacitors with a wide voltage window of 0.1–2.5 V. 相似文献
15.
Hengxing Wei Dr. Ying‐Ying Li Dr. Jinping Chen Dr. Yi Zeng Prof. Dr. Guoqiang Yang Prof. Dr. Yi Li 《化学:亚洲杂志》2012,7(11):2683-2689
An imidazolium‐modified hexa‐peri‐hexabenzocoronene derivative (HBC‐C11‐MIM[Cl?]) was designed and synthesized as a stabilizer to fabricate reduced graphene oxide (RGO). The resulting RGO/HBC‐C11‐MIM[Cl?] hybrid shows excellent dispersivity (5.0 mg mL?1) and stability in water. RGO/HBC‐C11‐MIM[Cl?] was comprehensively characterized by using atomic force microscopy, X‐ray diffraction, X‐ray photoelectron spectroscopy, thermogravimetric analysis, and Raman spectroscopy, thus revealing that one HBC‐C11‐MIM[Cl?] group can stabilize about 178 carbon atoms on the graphene sheets. The obtained hybrid film exhibits a high conductivity of 286 S m?1. Furthermore, the HBC‐C11‐MIM[Cl?]‐modified RGO sheets can be readily dispersed in polar organic solvents upon exchange of the hydrophilic Cl? ions for hydrophobic bis(trifluoromethylsulfonyl) amide (NTf2?) ions. 相似文献
16.
Core–Shell LiFePO4/Carbon‐Coated Reduced Graphene Oxide Hybrids for High‐Power Lithium‐Ion Battery Cathodes
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Sung Hoon Ha Prof. Yun Jung Lee 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(5):2132-2138
Core‐shell carbon‐coated LiFePO4 nanoparticles were hybridized with reduced graphene (rGO) for high‐power lithium‐ion battery cathodes. Spontaneous aggregation of hydrophobic graphene in aqueous solutions during the formation of composite materials was precluded by employing hydrophilic graphene oxide (GO) as starting templates. The fabrication of true nanoscale carbon‐coated LiFePO4‐rGO (LFP/C‐rGO) hybrids were ascribed to three factors: 1) In‐situ polymerization of polypyrrole for constrained nanoparticle synthesis of LiFePO4, 2) enhanced dispersion of conducting 2D networks endowed by colloidal stability of GO, and 3) intimate contact between active materials and rGO. The importance of conducting template dispersion was demonstrated by contrasting LFP/C‐rGO hybrids with LFP/C‐rGO composites in which agglomerated rGO solution was used as the starting templates. The fabricated hybrid cathodes showed superior rate capability and cyclability with rates from 0.1 to 60 C. This study demonstrated the synergistic combination of nanosizing with efficient conducting templates to afford facile Li+ ion and electron transport for high power applications. 相似文献
17.
Enhanced Electrocatalytic Performance of a Porous g‐C3N4/Graphene Composite as a Counter Electrode for Dye‐Sensitized Solar Cells
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Prof. Guiqiang Wang Dr. Juan Zhang Dr. Shuai Kuang Dr. Wei Zhang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(33):11763-11769
A porous graphitic carbon nitride (g‐C3N4)/graphene composite was prepared by a simple hydrothermal method and explored as the counter electrode of dye‐sensitized solar cells (DSCs). The obtained g‐C3N4/graphene composite was characterized by XRD, SEM, TEM, FTIR spectroscopy, and X‐ray photoelectron spectroscopy. The results show that incorporating graphene nanosheets into g‐C3N4 forms a three‐dimensional architecture with a high surface area, porous structure, efficient electron‐transport network, and fast charge‐transfer kinetics at the g‐C3N4/graphene interfaces. These properties result in more electrocatalytic active sites and facilitate electrolyte diffusion and electron transport in the porous framework. As a result, the as‐prepared porous g‐C3N4/graphene composite exhibits an excellent electrocatalytic activity. In I?/I3? redox electrolyte, the charge‐transfer resistance of the porous g‐C3N4/graphene composite electrode is 1.8 Ω cm2, which is much lower than those of individual g‐C3N4 (70.1 Ω cm2) and graphene (32.4 Ω cm2) electrodes. This enhanced electrocatalytic performance is beneficial for improving the photovoltaic performance of DSCs. By employing the porous g‐C3N4/graphene composite as the counter electrode, the DSC achieves a conversion efficiency of 7.13 %. This efficiency is comparable to 7.37 % for a cell with a platinum counter electrode. 相似文献
18.
Scrutinizing Defects and Defect Density of Selenium‐Doped Graphene for High‐Efficiency Triiodide Reduction in Dye‐Sensitized Solar Cells
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Xiangtong Meng Prof. Chang Yu Dr. Xuedan Song James Iocozzia Jiafu Hong Matthew Rager Prof. Huile Jin Prof. Shun Wang Longlong Huang Prof. Jieshan Qiu Prof. Zhiqun Lin 《Angewandte Chemie (International ed. in English)》2018,57(17):4682-4686
Understanding the impact of the defects/defect density of electrocatalysts on the activity in the triiodide (I3?) reduction reaction of dye‐sensitized solar cells (DSSCs) is indispensable for the design and construction of high‐efficiency counter electrodes (CEs). Active‐site‐enriched selenium‐doped graphene (SeG) was crafted by ball‐milling followed by high‐temperature annealing to yield abundant edge sites and fully activated basal planes. The density of defects within SeG can be tuned by adjusting the annealing temperature. The sample synthesized at an annealing temperature of 900 °C exhibited a superior response to the I3? reduction with a high conversion efficiency of 8.42 %, outperforming the Pt reference (7.88 %). Improved stability is also observed. DFT calculations showed the high catalytic activity of SeG over pure graphene is a result of the reduced ionization energy owing to incorporation of Se species, facilitating electron transfer at the electrode–electrolyte interface. 相似文献
19.
Iman Shackery Umarkant Patil Min‐Jung Song Ji Soo Sohn Sachin Kulkarni Surajit Some Su Chan Lee Min Sik Nam Wooyoung Lee Seong Chan Jun 《Electroanalysis》2015,27(10):2363-2370
A nickel hydroxide (Ni(OH)2)/3D‐graphene composite is used as monolithic free‐standing electrode for enzymeless electrochemical detection of glucose. Ni(OH)2 nanoflakes are synthesized by using a simple solution growth procedure on 3D‐graphene foam which was grown by chemical vapor deposition (CVD). The pore structure of 3D‐graphene allows easy access to glucose with high surface area, which leads to glucose detection with an ultrahigh sensitivity of 3.49 mA mM?1 cm?2 and a significant lower detection limit up to 24 nM. Cyclic voltammetry (CV) and potentionstatic mode is used for non‐enzymatic glucose sensing. The impedance and effective surface area have been studied well. The high sensitivity, low detection limit and simple configuration of Ni(OH)2/three dimensional (3D)‐graphene composite electrodes can evoke its industrial application in glucose sensing devices. 相似文献
20.
Dr. Nguyen Dang Luong Dr. Le Hoang Sinh Dr. Leena‐Sisko Johansson Dr. Joseph Campell Prof. Jukka Seppälä 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(8):3183-3186
Thiol‐ene click reaction was successfully employed for chemical modification of graphene oxide (GO) by one‐step synthesis. Herein, 2,2‐azobis(2‐methylpropionitrile) (AIBN) was used as thermal catalyst and cysteamine hydrochloride (HS?(CH2)2?NH2HCl) was used as thiol‐containing compound, which is incorporated to GO surface upon reaction with the C=C bonds. The hydrochloride acts as protecting group for the amine, which is finally eliminated by adding sodium hydroxide. The modified GO contains both S‐ and N‐containing groups (NS‐GO). We found that NS‐GO sheets form good dispersion in water, ethanol, and ethylene glycol. These graphene dispersions can be processed into functionalized graphene film. Besides, it was demonstrated that NS‐GO was proved to be an excellent host matrix for platinum nanoparticles. The developed method paves a new way for graphene modification and its functional nanocomposites. 相似文献