A Facile One-Pot Hydrothermal Technique of SBA-15 for Their Excellent Dye Adsorption
Keywords:
Mesoporous silica, SBA-15, dye adsorptionAbstract
Mesoporous silica SBA-15 containing Pluronic P123 triblock copolymer as a surfactant framework and tetraethyl orthosilicate--TEOS as an organosilica precursor was prepared by a facile one-step hydrothermal technique at 100 oC for 24 hours, followed by calcination at 500 oC for 12 hours. The neat SBA-15 was characterized by Fourier transform infrared spectroscopy--FT-IR, Transmission Electron Microscopy --TEM, and N2 sorption surface area and porosity analysis (BET). Furthermore, the SBA-15 indicated high adsorption capacity within 40 hours. The dyes and their adsorption rates include Methylene Blue (0.0067 s-1), Methyl Violet (0.0036 s-1), Congo Red (0.0035 s-1), and Rhodamine B (0.0018 s-1). The pore diameter of the material is about 5.0431 nm. The SBA-15 catalyst 5 mg can adsorb 500 ppm dye solutions at 73.80, 82.20, and 100% for Congo Red, Methyl Violet, and Methylene Blue, respectively. The catalysts have a high and fast absorption capacity for these dyes. It has the potential to develop industrial applications.
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