A simple aqueous electrochemical method to synthesize TiO2 nanoparticles

2015 ◽  
Vol 17 (43) ◽  
pp. 29319-29326 ◽  
Author(s):  
Ivan Bezares ◽  
Adolfo del Campo ◽  
Pilar Herrasti ◽  
Alexandra Muñoz-Bonilla
Keyword(s):  
Aqueous Solution ◽  
Tio2 Nanoparticles ◽  
Electrochemical Method ◽  
Electrochemical Approach

Here, a simple and rapid electrochemical approach to synthesize TiO2 nanoparticles in aqueous solution is reported.

Molecular Grafting on Si(111) Surfaces: An Electrochemical Approach

1996 ◽  
Vol 451 ◽  
Author(s):  
C. Henry de Villeneuve ◽  
J. Pinson ◽  
F. Ozanam ◽  
J. N. Chazalviel ◽  
P. Allongue
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Method ◽  
Organic Molecules ◽  
Diazonium Salts ◽  
Molecular Films ◽  
Electrochemical Approach ◽  
The Stability ◽  
Structural Characterizations ◽  
Direct Attachment

ABSTRACTThis works addresses the question of the direct attachment of organic molecules on Si(111) by an electrochemical method. Anodic grafting of -OR group is demonstrated by in-situ STM and the LDOS characterized. The grafting of aryl groups, by reduction of aryl diazonium salts in aqueous solution, is also described. This approach leads to well ordered and close-packed thin molecular films with various functionality. Different chemical and structural characterizations conclude to a Si-C binding, between the Si surface and aryl groups. The stability of films is also investigated.

scholarly journals Linear sweep polarographic determination of nucleic acids using acridine orange as a bioprobe

2007 ◽  
Vol 72 (11) ◽  
pp. 1085-1094 ◽  
Author(s):  
Wei Sun ◽  
Na Zhao ◽  
Xianlong Yuan ◽  
Kui Jiao
Keyword(s):  
Aqueous Solution ◽  
Acridine Orange ◽  
Electrochemical Method ◽  
Electrochemical Determination ◽  
Determination Method ◽  
Linear Regression Equation ◽  
Peak Potential ◽  
Linear Sweep ◽  
Buffer Solution

The interaction of acridine orange (AO) with double-stranded (ds) DNA in aqueous solution was investigated by linear sweep polarography (LSP) on a dropping mercury working electrode (DME). In pH 2.5 Britton-Robinson (B-R) buffer solution, AO had a sensitive linear sweep polarographic reductive peak at -0.89 V (vs. SCE), which could be greatly inhibited by the addition of dsDNA, with a positive shift of the peak potential. Based on the decrease of the reductive peak current, a new quantitative electrochemical determination method for dsDNA was developed with a linear range of 2.0?20.0 mg l-1 and the linear regression equation: ?Ip" (nA) = 111.90 C (mg l-1)+125.32 (n = 9, ? = 0.997). The influences of commonly co-existing substances, such as metal ions, amino acid, etc., on the determination were also investigated. The method is sensitive, rapid and simple with good selectivity. The new proposed method was further applied to the detection of RNA and three synthetic samples containing dsDNA with satisfactory results. The binding number and the equilibrium constant between dsDNA and AO were calculated by an electrochemical method.

Photocatalytic removal of nitrate using TiO2/polyacrylonitrile nanofiber membrane synthesized by co-electrospinning process

2014 ◽  
Vol 14 (4) ◽  
pp. 554-560 ◽  
Author(s):  
S. P. Suriyaraj ◽  
M. Benasir Begam ◽  
S. G. Deepika ◽  
P. Biji ◽  
R. Selvakumar
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Tio2 Nanoparticles ◽  
Nitrate Removal ◽  
Electrospinning Process ◽  
Order Kinetic ◽  
Nanofiber Membrane ◽  
Electrospinning Technique ◽  
X Ray ◽  
Pan Nanofiber

The present study investigates the development of titanium dioxide (TiO2)/polyacrylonitrile (PAN) nanofiber membrane for the removal of nitrate from aqueous solution by photocatalysis. The TiO2 nanoparticles were synthesized by conventional sol–gel method followed by blending them into PAN polymer. The blended solution was electrospun into nanofiber using the co-electrospinning technique. The nanoparticle, PAN nanofibers and the TiO2 impregnated nanofibers were characterized using suitable techniques like X-ray diffraction, high-resolution transmission electron microscopy and scanning electron microscopy attached with energy dispersive X-ray spectroscopy. The average size and the diameter of the TiO2 nanoparticles and TiO2/PAN nanofibers were found to be 22 ± 0.32 nm and 90 ± 15 nm respectively. TiO2 nanoparticles and TiO2/PAN nanofibers showed maximum nitrate removal of 74.67 and 39% respectively at 10 mg/L nitrate concentration at pH 4. However at higher concentration (50 mg/L), the nitrate removal was found to be only 16.87%. The experimental data were fitted onto pseudo second-order kinetic model. The impregnation of TiO2 nanoparticles into the PAN nanofibers by co-electrospinning techniques lead to higher removal of nitrate in aqueous solution at lower concentration (10 mg/L and below). However at higher concentration, the TiO2/PAN nanofiber membrane was inefficient to remove nitrate.

scholarly journals An In Silico study of TiO2 nanoparticles interaction with twenty standard amino acids in aqueous solution

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Shengtang Liu ◽  
Xuan-Yu Meng ◽  
Jose Manuel Perez-Aguilar ◽  
Ruhong Zhou
Keyword(s):  
Aqueous Solution ◽  
Amino Acids ◽  
Tio2 Nanoparticles ◽  
In Silico ◽  
In Silico Study
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