Graphite Electrodes Immersed in Nonaqueous Li+ Electrolytes Studied with a Combined Ultrahigh Vacuum–Electrochemistry Approach

2021 ◽  
Author(s):  
Raymond A. Wong ◽  
Yasuyuki Yokota ◽  
Emiko Kazuma ◽  
Motoyuki Oniki ◽  
Yousoo Kim
Keyword(s):  
Ultrahigh Vacuum ◽  
Graphite Electrodes

Electricity Production from Dual Chambers Microbial Fuel Cell Fed with Chicken Manure-Wastewater

2015 ◽  
Vol 3 (1) ◽  
pp. 9-18
Author(s):  
Ali J. Jaeel
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Chicken Manure ◽  
Electricity Production ◽  
Anaerobic Sludge ◽  
Livestock Wastewater ◽  
Graphite Electrodes ◽  
Reliable Source ◽  
Current Densities ◽  
Resistance Value

Chicken manure wastewaters are increasingly being considered a valuable resource of organic compounds. Screened chicken manure was evaluated as a representative solid organic waste. In this study, electricity generation from livestock wastewater (chicken manure) was investigated in a continuous mediator-less horizontal flow microbial fuel cell with graphite electrodes and a selective type of membrane separating the anodic and cathodic compartments of MFC from each other. The performance of MFC was evaluated to livestock wastewater using aged anaerobic sludge. Results revealed that COD and BOD removal efficiencies were up to 88% and 82%, respectively. At an external resistance value of 150 Ω, a maximum power and current densities of 278 m.W/m2 and 683 mA/m2, respectively were obtained, hence MFC utilizing livestock wastewater would be a sustainable and reliable source of bio-energy generation .

IONIZATION GAGE FOR ULTRAHIGH VACUUM

2019 ◽  
Vol 68 ◽  
pp. 126-133
Author(s):  
V. K. Bazylev ◽  
◽  
A. M. Zhidkov ◽  
V. A. Korotchenko ◽  
V. E. Skvortsov ◽  
...  
Keyword(s):  
Ultrahigh Vacuum

Ultrahigh-Vacuum Electron Microscopy for Gold Nanostructures

2001 ◽  
Vol 7 (S2) ◽  
pp. 920-921
Author(s):  
Yukihito Kondo ◽  
Kimiharu Okamoto ◽  
Mikio Naruse ◽  
Toshikazu Honda ◽  
Mike Kersker
Keyword(s):  
Electron Microscopy ◽  
Field Emission ◽  
Electronic Devices ◽  
Ultrahigh Vacuum ◽  
Gold Nanostructures ◽  
Scanning Tunneling ◽  
Nano Scale ◽  
Transmission Electron ◽  
Column Type ◽  
Schottky Type

Ultrahigh-vacuum transmission electron microscopy (UHVTEM) has become increasingly popular for the direct observation of nanostructures having clean surfaces, since industrial requirements to make and research nano-scale materials have been rapidly growing for quantum or nanoscale electronic devices. Since we have first developed high resolution UHVTEM in 1986, the UHVTEMs have been evolved with steady advances such as UHV compatible goniometer, field emission gun or etc. Furthermore, the UHVTEM started to combine analytical capabilities such as energy dispersive X-ray spectrometer, in-column type energy filter and etc., and to combine STM (scanning tunneling microscope). The UHV technology is essential for the analysis, because the portion of contaminant in a nano-scale specimen increases as the size of the specimen goes down. This paper reports the results of gold nanostructures by recently the developed UHVTEM.Figure 1 shows recently developed UHVTEM with Schottky type field emission gun.

scholarly journals Bioelectrocatalytic Activity of W-Formate Dehydrogenase Covalently Immobilized on Functionalized Gold and Graphite Electrodes

2021 ◽  
Author(s):  
Julia Alvarez-Malmagro ◽  
Ana R. Oliveira ◽  
Cristina Gutiérrez-Sánchez ◽  
Beatriz Villajos ◽  
Inês A.C. Pereira ◽  
...  
Keyword(s):  
Formate Dehydrogenase ◽  
Graphite Electrodes

scholarly journals Factors Influencing the Formation of Sodium Hydroxide by an Ion Exchange Membrane Cell

Batteries ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 34
Author(s):  
Jimmy Aurelio Rosales-Huamani ◽  
Juan Taumaturgo Medina-Collana ◽  
Zoila Margarita Diaz-Cordova ◽  
Jorge Alberto Montaño-Pisfil
Keyword(s):  
Ion Exchange ◽  
Sodium Hydroxide ◽  
Linear Trend ◽  
Electrolytic Cell ◽  
Electrolysis Time ◽  
Operational Parameters ◽  
Graphite Electrodes ◽  
Exchange Membrane ◽  
Membrane Cell ◽  
Production Cell

The present study aimed to evaluate the factors that influence the formation of sodium hydroxide (NaOH) by means of an electrolytic cell with ion exchange membranes. To achieve this experiment, the NaOH production cell had to be designed and built inexpensively, using graphite electrodes. The operational parameters in our study were: initial NaOH concentration, applied voltage, and temperature. All experiments were carried out using model NaCl solutions with a concentration of 40 g/L for 150 min. The results of the experiment were that the NaOH concentration, conductivity, and pH presented an increasing linear trend with the electrolysis time. Finally, it was possible to obtain the efficiency level of the electric current in our investigation, which was an average of 80.2%, that indicated good performance of the built cell.

scholarly journals Electrochemical Investigation of Curcumin–DNA Interaction by Using Hydroxyapatite Nanoparticles–Ionic Liquids Based Composite Electrodes

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4344
Author(s):  
Merve Uca ◽  
Ece Eksin ◽  
Yasemin Erac ◽  
Arzum Erdem
Keyword(s):  
Electrochemical Impedance ◽  
Differential Pulse ◽  
Dna Interaction ◽  
Composite Electrodes ◽  
Hydroxyapatite Nanoparticles ◽  
Graphite Electrodes ◽  
X Ray ◽  
Pulse Voltammetry ◽  
Polymerase Chain

Hydroxyapatite nanoparticles (HaP) and ionic liquid (IL) modified pencil graphite electrodes (PGEs) are newly developed in this assay. Electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and cyclic voltammetry (CV) were applied to examine the microscopic and electrochemical characterization of HaP and IL-modified biosensors. The interaction of curcumin with nucleic acids and polymerase chain reaction (PCR) samples was investigated by measuring the changes at the oxidation signals of both curcumin and guanine by differential pulse voltammetry (DPV) technique. The optimization of curcumin concentration, DNA concentration, and the interaction time was performed. The interaction of curcumin with PCR samples was also investigated by gel electrophoresis.

Sign in / Sign up

Export Citation Format

Share Document