Deposition of sorption and photocatalytic material on nanofibers and fabric by controlled sublimation

EasyChair Preprint 399

Abstract

This paper presents a new method of deposition of photocatalytic sorbent on nanofibers. This deposition uses controlled sublimation of water molecules from the vacuum-gel that is patent-protected. Silica gel nanostructures are precipitated by heterogeneous nucleation on the surface of nanofibres from an aqueous suspension of silicate nanoparticles and semiconductor graphitic carbon nitride or garaphene nanosheets. After gel rapid solidification of at least 104 K/s, the nanofibers coated with the silica gel dispersion gC3N4, or graphene are subjected to controlled sublimation at - 41 oC. This technology has produced a nanofibrous material, which is stably coated with a highly porous silicate sorbent with dispersed photocatalytic nanoparticles. This textile material has a total sorption surface area of the order of hundreds m2/g. Unlike conventional sorbents, it is capable, thanks to dispersed photocatalytic nanoparticles, to regenerate sorption capacity by the absorption of visible light. The results of the preliminary research confirm the high application potential of new controlled sublimation technology in the production of regenerable photocatalytic sorption fabrics.

Keyphrases: Nanofibers, Photocatalysis, controlled sublimation, deposition, fabric, sorption, sorption fabric

@booklet{EasyChair:399,
  author    = {Richard Dvorsky and Ladislav Svoboda and Jiří Bednar and Pavel Mancik and Dalibor Matysek and Marketa Pomiklova},
  title     = {Deposition of sorption and photocatalytic material on nanofibers and fabric by controlled sublimation},
  doi       = {10.29007/wmp3},
  howpublished = {EasyChair Preprint 399},
  year      = {EasyChair, 2018}}