Comparison of the properties of silica aerogel doped with two different laser dyes: Crystal violet and Rhodamine B
In this paper, silica aerogel was doped with two types of laser dyes, Crystal Violet and Rhodamine B, dissolved in ethanol. All samples were prepared in two different ways, with different concentrations. The first way, named (CV1, RH1), the modification occurs after the samples are converted to gel. The second way, called (CV2, RH2), the modification procedure, starts by adding the modified solution to the sol. TEOS were used as precursors in a two-step acid-based catalysis, and silanol group TMCS + n-hexane was used as a surface modification. The comparison of the characterization and structural properties between the two dyes was made by FTER, FESEM, XRD, BET, and contact angle measurements. Results indicate that crystal violet gives much better results than Rhodamine B, as the measurement of the contact angle was 153° and the surface area reached 970 m2/gm, while for Rhodamine B, the maximum contact angle reached by the samples was 146° and the largest surface area reached 899 m2/gm. The total pour volume was 1.066 cm3/gm in crystal violet, while it was equal to 1.6 cm3/gm in Rhodamine B.