Preparation of porous silica spheres with self-dispersing properties--颗粒学报PARTICUOLOGY

Li, Y., Zou, B., Wang, X., & Wang, Z. (2013). Preparation of porous silica spheres with self-dispersing properties. Particuology, 11(6), 723–727. https://doi.org/10.1016/j.partic.2013.01.002

Preparation of porous silica spheres with self-dispersing properties

Yujiao Li, Bo Zou, Xiaofeng Wang^*, Zichen Wang

College of Chemistry, Jilin University, Changchun 130012, China

10.1016/j.partic.2013.01.002

Volume 11, Issue 6, December 2013, Pages 723-727

Received 3 October 2012, Revised 13 December 2012, Accepted 7 January 2013, Available online 26 February 2013.

E-mail: Wangxf103@jlu.edu.cn

Highlights

► Porous silica spheres were synthesized in a water/oil emulsion.

► Surface area and pore volume of the product could reach 772.3 m²/g and 0.663 cm³/g.

► Electrolyte washing process conferred self-dispersal properties to the product.

► Oil phase could be readily recycled to reduce chemical cost.

Abstract

A sol–gel procedure in a water/oil emulsion was introduced for the synthesis of porous silica spheres. Tetraethoxysilane was used as the silica source. The specific surface area and total pore volume of the product reached 772.3 m²/g and 0.663 cm³/g, respectively. The electrolyte washing process conferred a surface charge to the product, which displayed self-dispersal properties in water. The porous spheres have potential applications in the fields of drug delivery, controlled release capsules, indoor air pollutant scavengers, and hydrogen storage agents. The oil phase, which accounts for over 80% of the chemical cost of the procedure, could largely be recycled by filtering, standing, and layering. The whole procedure is suitable for application as an industrial process.

Graphical abstract

Keywords

Porous material; Silica sphere; Emulsion; Self-dispersal

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