Adsorption of direct dyes from aqueous solutions by carbon nanotubes: Determination of equilibrium, kinetics and thermodynamics parameters

2008 ◽  
Vol 327 (2) ◽  
pp. 308-315 ◽  
Author(s):  
Chao-Yin Kuo ◽  
Chung-Hsin Wu ◽  
Jane-Yii Wu
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Direct Dyes ◽  
Kinetics And Thermodynamics ◽  
Thermodynamics Parameters

Potentiometric Sensors Based on MF-4SC Membranes and Carbon Nanotubes for the Determination of Nicotinic Acid in Aqueous Solutions and Pharmaceuticals

2020 ◽  
Vol 2 (4) ◽  
pp. 256-264
Author(s):  
A. V. Parshina ◽  
E. Yu. Safronova ◽  
G. Z. Habtemariam ◽  
E. I. Ryzhikh ◽  
I. A. Prikhno ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Nicotinic Acid ◽  
Potentiometric Sensors

Determination of the Kinetics and Thermodynamics Parameters of Biodiesel Oxidation Reaction Obtained from an Optimized Mixture of Vegetable Oil and Animal Fat

2013 ◽  
Vol 27 (11) ◽  
pp. 6866-6871 ◽  
Author(s):  
Diego Galvan ◽  
Juliane R. Orives ◽  
Rodolfo L. Coppo ◽  
Elisângela T. Silva ◽  
Karina G. Angilelli ◽  
...  
Keyword(s):  
Vegetable Oil ◽  
Oxidation Reaction ◽  
Kinetics And Thermodynamics ◽  
Thermodynamics Parameters ◽  
Animal Fat

Boehmite Nanofibers as a Dispersant for Nanotubes in an Aqueous Sol

2018 ◽  
Author(s):  
Gen Hayase
Keyword(s):  
Carbon Nanotubes ◽  
Aspect Ratio ◽  
Aqueous Solutions ◽  
High Aspect Ratio ◽  
Multiwall Carbon Nanotubes ◽  
Multiwall Carbon ◽  
Nanotube Films

By exploiting the dispersibility and rigidity of boehmite nanofibers (BNFs) with a high aspect ratio of 4 nm in diameter and several micrometers in length, multiwall-carbon nanotubes (MWCNTs) were successfully dispersed in aqueous solutions. In these sols, the MWCNTs were dispersed at a ratio of about 5–8% relative to BNFs. Self-standing BNF–nanotube films were also obtained by filtering these dispersions and showing their functionality. These films can be expected to be applied to sensing materials.

LUMINESCENT DETERMINATION OF SUGAR IN NATURAL HONEY

2020 ◽  
Vol 0 (4) ◽  
pp. 29-32
Author(s):  
B.M. GAREEV ◽  
◽  
A.M. ABDRAKHMANOV ◽  
G.L. SHARIPOV ◽  
◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laboratory Test ◽  
Aqueous Solutions ◽  
Analytical Method ◽  
Sugar Content ◽  
Carbon Quantum Dots ◽  
Photoluminescence Intensity ◽  
Sucrose Content ◽  
Natural Honey

The photoluminescence of carbon quantum dots synthesized from natural honey and mixtures of honey and sugar has been studied. An increase in the sugar content leads to a decrease in the photoluminescence intensity without changing the shape of the luminescence spectrum of these quantum dots aqueous solutions, which is associated with a decrease in the yield of their synthesis in the sugar presence. The discovered effect can be used to detect sugar in honey. When examining five different market samples of flower honey using this method, two of them showed a significant decrease in the photoluminescence intensity. A laboratory test for compliance with GOST 19792-2017 Standard requirements established an excess of the sucrose content in these samples. Luminescent determination of sugar in honey does not require complicated equipment and can be used to develop a new analytical method for determining the sugar content in counterfeit natural honey.

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