Ionic properties of an organic-inorganic sol-gel hybrid based on polydimethylsiloxane and tetraethoxysilane doped with sodium dodecyl sulfate

2010 ◽  
Vol 115 (2) ◽  
pp. 851-854 ◽  
Author(s):  
Raffael Costa de Figueiredo Pinto ◽  
Carlos William de Araujo Paschoal ◽  
Waldeci Paraguassu ◽  
Manoel Carvalho Castro ◽  
Auro Atsuchi Tanaka ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Sol Gel ◽  
Sodium Dodecyl ◽  
Dodecyl Sulfate

Surfactant-aided sol-gel synthesis of TiO2–MgO nanocomposite and their photocatalytic azo dye degradation activity

2016 ◽  
Vol 54 (12) ◽  
pp. 1561-1570 ◽  
Author(s):  
Ajit K Sharma ◽  
Byeong-Kyu Lee
Keyword(s):  
Photocatalytic Activity ◽  
Sodium Dodecyl Sulfate ◽  
Visible Light ◽  
Anionic Surfactant ◽  
Dye Degradation ◽  
Sol Gel ◽  
Sodium Dodecyl ◽  
Ionic Surfactant ◽  
X Ray ◽  
Dodecyl Sulfate

In this work, a surfactant-aided TiO2–MgO nanocomposite (Ti-M-S) was successfully synthesized by a sol-gel process with the aid of sodium dodecyl sulfate as a structure-directing anionic surfactant. The results demonstrated the effectiveness of this approach for controlling both the amount and the distribution of MgO nanoparticles within the TiO2 framework after calcination. The photocatalytic activity of the synthesized nanocomposite for degradation of methyl orange (MO) and methylene blue (MB) dyes used as a model wastewater contaminant was investigated under visible light irradiation. The synthesized nanocomposite was systematically characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy/energy-dispersive X-ray (SEM/EDX) analysis. The decolorization results revealed that the Ti-M-S1 (with an anionic surfactant: sodium dodecyl sulfate) and Ti-M-S2 (with a non-ionic surfactant: Triton X-100) nanocomposites showed much more photocatalytic activity than the pure TiO2 did under visible light. MB and MO dye removal efficiencies of 82.4% and 77.8 %, respectively, were achieved by Ti-M-S1 (1%) within about 120 min and no further changes in the uptake were observed up to 24 h. This confirmed the suitability of the synthesized nanocomposite for use as a photocatalyst under visible light with the added advantage of increasing the versatility of potential applications for TiO2 photocatalysts.

Solubility and adsorption behaviors of chlorophenols in the presence of surfactant

1997 ◽  
Vol 35 (7) ◽  
pp. 123-130 ◽  
Author(s):  
J. C. Liu ◽  
P. S. Chang
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Critical Micelle Concentration ◽  
Sodium Dodecyl ◽  
Adsorption Behaviors ◽  
Brij 35 ◽  
Important Index ◽  
Dodecyl Sulfate ◽  
Triton X

The solubility of chlorophenols as affected by surfactant was investigated. Three kinds of surfactant, sodium dodecyl sulfate, Triton X-100, and Brij 35, were utilized. The solubilization of chlorophenols by surfactant follows the order of 2,4,6-trichlorophenol > 2,4-dichlorophenol > 2,6-dichlorophenol > 2-chlorophenol; and the critical micelle concentration is an important index. The adsorption reactions of 2,4-dichlorophenol and 2,4,6- trichlorophenol onto hydrous montmorillonite in the presence of surfactant were examined. The presence of surfactant decreased the adsorption of chlorophenols significantly. The roles of hydrophobicity of chlorophenols in solubilization and adsorption behaviors are discussed.

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