Abstract
The influence of dye laser Rhodamine 6G (R6G) on the molecular structure of silica aerogel prepared by normal drying method is reported. The study also tests the effect of dye concentration on morphological and physical properties. Fourier Transform Infrared Spectroscopy (FTIR) was used to examine this effect, in addition to Field Emission Scanning Electron Microscopy (FESEM), contact angle, and surface area measurement. It was found from FTIR data that the dye laser stays with the inner structure of samples and, at high concentration, it gives a good influence by reducing (OH) band and increasing (CH) band, leading to changing the contact angle from (123á´¼) to (145á´¼). Whereas particle size varied from 22 nm to 47 nm after doping, resulting in a decrease in surface area from 673 m2/gm before doping to 357 m2/gm after doping. It was also found that the samples became lightweighted through the noticeable decrease in the amount of density from 0.28 to 0.17 gm/cm3.
Highlights
Aerogels indicate dry gels with a very high virtual or specific pore volume, high surface area, low electricity, and high specific transparency [1, 2]
Others succeeded to prepare silica aerogel doped in Coumarin dye
Whereas one research studied the effect of Alumina nanoparticles prepared by using the sol-gel method on photoluminescence of Rhodamine 110 dye laser solution [20]
Summary
Aerogels indicate dry gels with a very high virtual or specific pore volume, high surface area, low electricity, and high specific transparency [1, 2]. Pore liquid must be substituted by low surface tension solvent to decrease related drying shrinkage and capillary stress [17]. Others succeeded to prepare silica aerogel doped in Coumarin dye They observed that the compatibility of this dyes with silica gel gives a good homogeneity and transparency [19]. Hydrophobic aerogel prepared with excellent specifications in terms of low density, shrinkage-free, and high surface area, was synthesized via normal drying method; Rhodamine 6G was dissolved in ethanol for doping, using tetraethylorthosilicate (TEOS) as a precursor and trimethylchlorosilan (TMCS) and n-hexane for surface modification
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