Preparation and Characterization of Glycyrrhizin-Graphene Hybrid Materials

2012 ◽  
Vol 531 ◽  
pp. 145-148
Author(s):  
Zong Hua Wang ◽  
Yan Li Gao ◽  
Jian Fei Xia ◽  
Fei Fei Zhang ◽  
Yan Zhi Xia ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Hybrid Materials ◽  
Model Compound ◽  
Carbon Electrode ◽  
The Novel ◽  
Electron Transfer Process ◽  
Efficient Energy ◽  
Sandwich Construction ◽  
Photo Induced Electron Transfer

A glycyrrhizin decorated graphene hybrid materials (GL-G) was synthesized, which is a layer-to-layer sandwich construction. The results of characterization indicate that a photo induced electron transfer process or efficient energy transferring along the GL-G interface. Furthermore, the as-made hybrid material was used as a modifier of the glassy carbon electrode to construct a sensor (GL-G/GCE). Using p-nitrophenol as a model compound, the novel sensor demonstrated a highly enhanced electrochemical activity for it. The peak current of p-nitrophenol was significantly improved at the sensor.

scholarly journals Electrokinetic and Impedimetric Dynamics of FeCo-Nanoparticles on Glassy Carbon Electrode

Nano Hybrids ◽  
2013 ◽  
Vol 3 ◽  
pp. 1-23 ◽  
Author(s):  
Chinwe O. Ikpo ◽  
Njagi Njomo ◽  
Kenneth I. Ozoemena ◽  
Tesfaye Waryo ◽  
Rasaq A. Olowu ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Transfer Process ◽  
Dimethyl Carbonate ◽  
Electrochemical Impedance ◽  
Ethylene Carbonate ◽  
Carbon Electrode ◽  
Electron Transfer Process ◽  
Feco Nanoparticles

The electrochemical dynamics of a film of FeCo nanoparticles were studied on a glassy carbon electrode (GCE). The film was found to be electroactive in 1 M LiClO4 containing 1:1 v/v ethylene carbonate dimethyl carbonate electrolyte system. Cyclic voltammetric experiments revealed a diffusion-controlled electron transfer process on the GCE/FeCo electrode surface. Further interrogation on the electrochemical properties of the FeCo nanoelectrode in an oxygen saturated 1 M LiClO4 containing 1:1 v/v ethylene-carbonate-dimethyl carbonate revealed that the nanoelectrode showed good response towards the electro-catalytic reduction of molecular oxygen with a Tafel slope of about 120 mV which is close to the theoretical 118 mV for a single electron transfer process in the rate limiting step; and a transfer coefficient (α) of 0.49. The heterogeneous rate constant of electron transfer (ket), exchange current density (io) and time constant (τ) were calculated from data obtained from electrochemical impedance spectroscopy and found to have values of 2.3 x 10-5 cm s-1, 1.6 x 10-4 A cm-2 and 2.4 x 10-4 s rad-1, respectively.

scholarly journals Monitoring of Glucose in Beer Brewing by a Carbon Nanotubes Based Nylon Nanofibrous Biosensor

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Marco Mason ◽  
Edoardo Longo ◽  
Matteo Scampicchio
Keyword(s):  
Carbon Nanotubes ◽  
Electron Transfer ◽  
Cyclic Voltammetry ◽  
Electrochemical Biosensor ◽  
Carbon Electrode ◽  
Multiwalled Carbon ◽  
Beer Brewing ◽  
Brewing Process ◽  
A Current

This work presents the design, preparation, and characterization of a novel glucose electrochemical biosensor based on the immobilization of glucose oxidase (GOX) into a nylon nanofibrous membrane (NFM) prepared by electrospinning and functionalized with multiwalled carbon nanotubes (CNT). A disc of such GOX/CNT/NFM membrane (40 μm in thickness) was used for coating the surface of a glassy carbon electrode. The resulting biosensor was characterized by cyclic voltammetry and chronoamperometry, with ferrocene methanol as mediator. The binding of GOX around the CNT/NFM greatly enhances the electron transfer, which results in a biosensor with a current five times higher than without CNT. The potential usefulness of the proposed biosensor was demonstrated with the analysis of glucose in commercial beverages and along the monitoring of the brewing process for making beer, from the mashing to the fermentation steps.

Current trends and perspectives on emerging Fe-derived noble metal-free oxygen electrocatalysts

2021 ◽  
Author(s):  
Zubair Ahmed ◽  
Vivek Bagchi
Keyword(s):  
Electron Transfer ◽  
Activation Barrier ◽  
High Activation ◽  
Electron Transfer Process ◽  
Free Oxygen ◽  
Efficient Energy ◽  
Metal Free ◽  
Current Trends ◽  
High Activation Barrier ◽  
Oxygen Electrochemistry

Oxygen electrochemistry that comprises oxygen evolution and reduction reactions (OER/ORR) is vital for sustainable, clean and efficient energy generation. However, the high activation barrier due to the multi-electron transfer process...

N-CND modified NH2-UiO-66 for photocatalytic CO2 conversion under visible light by a photo-induced electron transfer process

2019 ◽  
Vol 55 (33) ◽  
pp. 4845-4848 ◽  
Author(s):  
Liyong Chen ◽  
Fengyang Yu ◽  
Xiaoshuang Shen ◽  
Chunying Duan
Keyword(s):  
Electron Transfer ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Transfer Process ◽  
Visible Light Irradiation ◽  
Light Absorption ◽  
Co2 Conversion ◽  
Electron Transfer Process ◽  
Photo Induced Electron Transfer ◽  
Photocatalytic Co2 Conversion

A N-CNDs/NH2-UiO-66 composite exhibits enhanced photocatalytic activity for CO2 conversion under visible light irradiation. This is attributed to a photo-induced electron transfer process from the light absorption antenna of the N-CNDs to the NH2-UiO-66 photocatalyst.

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