Pr A Un

and dye (dots). The pink domain is the polyelectrolyte/surfactant complex domain that can interact with the dyes and remove them from solution. ...
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In situ spectroscopic studies of the behavior of polyelectrolyte/surfactant mixtures at the water/TiO2 interface using attenuated total internal reflection Fourier transform infrared spectroscopy (ATR-FTIR) and multivariate least squares data analysis.

ATR-FTIR spectra of SiO2 at Different Steps in the Surface Modification Polyelectrolyte Derivatized SiO2 Surface 0.06

0.05 0.04

Pr

0.03 0.02

1800

1700

1600

A Un

1500

Wavenumber (cm-1)

1400

Amine Derivatized SiO2 Surface

0.01 0 1300

Bare SiO2 Surface

Increasing Surfactant Concentration

Cartoon of surface modified SiO2 interacting with surfactant (pink lines) and dye (dots). The pink domain is the polyelectrolyte/surfactant complex domain that can interact with the dyes and remove them from solution.

Dr. Dion Rivera Department of Chemistry Central Washington University Ellensburg, WA

Dye Removal: For Bromothymol Blue 1x10-6 M to