Amperometric NADH sensor based on a carbon ceramic electrode modified with the natural carotenoid crocin and multi-walled carbon nanotubes

2016 ◽  
Vol 184 (2) ◽  
pp. 473-481 ◽  
Author(s):  
Mahmoud Roushani ◽  
Maryam Karami ◽  
Behruz Zare Dizajdizi
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Ceramic Electrode ◽  
Multi Walled Carbon Nanotubes ◽  
Carbon Ceramic ◽  
Walled Carbon Nanotubes

scholarly journals Modification of Ceramic Membranes with Carbon Compounds for Pharmaceutical Substances Removal from Water in a Filtration–Adsorption System

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 481
Author(s):  
Daniel Polak ◽  
Izabela Zielińska ◽  
Maciej Szwast ◽  
Igor Kogut ◽  
Artur Małolepszy
Keyword(s):  
Carbon Nanotubes ◽  
Ceramic Membranes ◽  
Adsorption Properties ◽  
Permeate Flux ◽  
Pharmaceutical Substances ◽  
Carboxylic Groups ◽  
Multi Walled Carbon Nanotubes ◽  
Carbon Ceramic ◽  
Filtration Properties ◽  
Walled Carbon Nanotubes

The aim of this work is to develop a new type of carbon-ceramic membranes for the removal of pharmaceutical substances from water. The membranes were prepared by the chemical modification method using an organosilicon precursor—octadecyltrichlorosilane (ODTS). Graphene oxide, multi-walled carbon nanotubes with carboxylic groups, and single-walled carbon nanotubes were used in the modification process. The filtration properties and adsorption properties of the developed membranes were tested. In order to characterize the membrane, the water permeability, the change of the permeate flux in time, and the adsorbed mass of the substance were determined. Additionally, the surface properties of the membranes were characterized by contact angle measurements and porosimetry. The antibiotic tetracycline was used in the adsorption tests. Based on the results, the improved adsorption properties of the modified membrane in relation to the unmodified membrane were noticed. Novel ceramic membranes modified with MWCNT are characterized by 45.4% removal of tetracycline and permeate flux of 520 L·h·m−2·bar−1. We demonstrated the ability of modified membranes to adsorb pharmaceuticals from water streams that are in contact with the membrane. Novel membranes retain their filtration properties. Therefore, such membranes can be used in an integrated filtration–adsorption process.

Carbon Nanotubes-Doped Glassy Carbon Ceramic Composite Electrode and its Electrocatalytic Reduction of Nitrite

2011 ◽  
Vol 306-307 ◽  
pp. 1215-1220 ◽  
Author(s):  
Dan Zi Sun
Keyword(s):  
Carbon Nanotubes ◽  
Glassy Carbon ◽  
Ceramic Composite ◽  
Composite Electrode ◽  
Signal To Noise Ratio ◽  
Sol Gel ◽  
Organically Modified ◽  
Multi Walled Carbon Nanotubes ◽  
Carbon Ceramic ◽  
Walled Carbon Nanotubes

A conductive glassy carbon ceramic composite electrode (GCCE) comprised of multi-walled carbon nanotubes (MWNTs) and glassy carbon microparticles in an organically modified silicate matrix was fabricated using a sol-gel method. The electrode thus prepared exhibits electrocatalytic behavior to the reduction of nitrite and facilitates the detection of nitrite at an applied potential of 0.0 V. A linear range from 2.5×10-5 to 3×10-3 M for the detection of sodium nitrite has been observed at the composite electrode with a sensitivity of 9.6 μA/mM and a detection limit of 9×10-6 M based on a signal-to-noise ratio of 3.

Multi-walled Carbon Nanotubes Penetrate into Plant Cells and Affect the Growth of Onobrychis arenaria Seedlings

Acta Naturae ◽  
2011 ◽  
Vol 3 (1) ◽  
pp. 99-106 ◽  
Author(s):  
E A Smirnova ◽  
A A Gusev ◽  
O N Zaitseva ◽  
E M Lazareva ◽  
G E Onishchenko ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Plant Cells ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes
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