- Correction to: Surface and porous textural properties of silica-wollastonite composites prepared by sol-gel process (vol 90, pg 113, 2019) doi link

Auteur(s): Larreal de Hernandez Lismarihen, Anez-Borges Liz, Woignier Thierry, Alaoui Adil Hafidi, Etienne-Calas S., Despetis F., Bonnet L., Colaiocco B., Tahir S., Dieudonne-George P.(Corresp.)

(Article) Publié: Journal Of Sol-Gel Science And Technology, vol. 90 p.126-126 (2019)
Texte intégral en Openaccess : openaccess

Ref HAL: hal-02367687_v1
DOI: 10.1007/s10971-019-04952-1
WoS: WOS:000466160600014
Exporter : BibTex | endNote

Silica-wollastonite xerogel composites (xerocomposites) with different wollastonite filler content were obtained after classical drying of silica-wollastonite gels. Two different silica precursors were used, TEOS and colloidal LUDOX, for composites named TW and LW, respectively. We utilized SAXS experiments, N2 adsorption-desorption, and SEM techniques to determine the textural and structural properties of these porous materials. For both the TW and LW composites, it was shown that a macroporosity and a mesoporosity coexist. We argue that the proportion of macroporosity directly depends on the proportion of wollastonite fillers in the composite. We propose a unique two-stage drying mechanism to explain the formation of macropores. We additionally found that the surface of wollastonite fillers was covered by a dense multilayer packing of silica colloids in LUDOX LW xerocomposites. We believe that these surface-modified wollastonite fillers could improve the carbonation kinetics of wollastonite when used as a precursor for aqueous mineral carbonation, a promising route for safe and durable carbon sequestration.