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Abstract

A successful synthesis of SBA-15 with semi-spherical morphology and suitable texture properties was achieved using hydrothermal technique. Sodium silicate, derived from silica sand from Iraq, was used as a silica precursor, and Pluronic p123 triblock copolymer was used as a template with a strong acid media (pH < 1). The effect of adding (1–3) g of either polyvinyl alcohol (PVA), Polyvinyl pyrrolidone (PVP -k30), or Sodium dodecyl sulfate (SDS) dispersant agents on the texture properties of the synthesized SBA-15 was studied. The SBA-15 sample underwent various characterization techniques, including X-ray diffraction (XRD), Fourier transform infrared (FTIR), atomic force microscopy (AFM), nitrogen adsorption-desorption using Brunauer Emmett Teller (BET), and field emission scanning electron microscopy (FESEM).

XRD analysis showed a single peak in the 2θ= 20–25°, indicating the presence of pure SBA-15. The FTIR spectroscopy results demonstrated presence of key functional groups like silanone, siloxane, and silanol. Using these dispersant agents had a discernible effect on the dispersion of particles to an average particle size distribution in a nanoscale range producing a high surface area of the prepared SBA-15 material, which ranged between 349 to 871 cm2/g, while not influencing the pore volume, and pore size, which are ranged between 0.17 to 0.43 cm3/g, and between 2 to 2.5 nm, respectively. Also, all prepared samples had a nano-scale range.

The optimum texture properties were obtained using 2 g of PVP-k30 dispersion agent. Finally, it was observed that the spherical shape of SBA-15 particles was distorted by introducing more than 1 g of dispersion agents.

Keywords

Dispersing agents, Polyvinyl pyrrolidone, SBA-15, Sodium dodecyl sulfate, Sodium silicate

Subject Area

Chemistry

Article Type

Article

First Page

2854

Last Page

2863

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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