Determining Surface Vinyl on Vinyltriethoxysilane Modified Nanosilica by Coulometry
Zhixian Chang1
1Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P.R. China
2Environment and Health Engineering Centre of Henan College, Kaifeng 475004, P.R. China
*Corresponding author: Fax: +86 3783881589; E-mail: lideliang@henu.edu.cn
Jianying Qu1
1Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P.R. China
2Environment and Health Engineering Centre of Henan College, Kaifeng 475004, P.R. China
*Corresponding author: Fax: +86 3783881589; E-mail: lideliang@henu.edu.cn
Deliang Li1
1Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P.R. China
2Environment and Health Engineering Centre of Henan College, Kaifeng 475004, P.R. China
*Corresponding author: Fax: +86 3783881589; E-mail: lideliang@henu.edu.cn
Asian Journal of Chemistry,
Vol. 23 No. 5 (2011): Vol 23 Issue 5
A coulometric method to determine surface vinyl on vinyltriethoxysilane modified nanosilica (VTES-SiO2) quantitatively was established. The influences of electrolyte, reaction time, compensation polarization potential, solvent etc. in the determination system were studied. Experimental results indicated that the optimum conditions was to adopt the system of 50 mL 2 mol/L KBr + 300 mL HCOOH + 150 mL anhydrous ethanol as electrolyte, 0.5 h of reaction time, 250 mV of compensation polarization potential. This method was precise and accurate with recovery ratio of 98.1-103.3 % and relative standard deviation of 2.16 %. It might be used to determine surface vinyl on VTES-SiO2 and its relevant products.
Chang1, Z., Qu1, J., & Li1, D. (2011). Determining Surface Vinyl on Vinyltriethoxysilane Modified Nanosilica by Coulometry. Asian Journal of Chemistry, 23(5), 1983–1985. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/10282
