Photocatalytic fabrics based on reduced graphene oxide and TiO2 coatings

Abstract

a b s t r a c tThe purpose of this work is to obtain photocatalytic fabrics based on reduced graphene oxide (RGO) and TiO 2 coatings on polyester fabrics. The influence of the applied number of RGO coatings on properties such as light absorption, conductivity, electroactivity and photocatalytic properties of the fabrics was established. An improvement of these properties with the number of RGO coatings applied was obtained. FESEM, EDX, XPS and FTIR-ATR showed the incorporation of the TiO 2 nanoparticles on the fabrics. FTIR-ATR showed the formation of a bidentate carboxylic ligand with titanium atoms. The photocatalytic properties of the fabrics were tested with Rhodamine B dye solutions. Photocatalytic efficiency increased with the number of RGO coatings, due to the increased light absorption, and better electrical properties. The charge transfer resistance (R ct ) and its time constant ( ) decreased, indicating a better electron transfer which helps to increase the lifetime of the pair electron/hole.

Graphene Modified Multifunctional Personal Protective Clothing

“…Most of the reported research followed facile “immersion and drying” technique. Based on fiber chemistry many modification approach has got attentions for better interaction and bonding between fiber and GO, such as use of adhesives,133a,115 coupling agents, plasma treatment, chemical activation, grafting via esterification,110b,116,119 microwave‐assist polymerization (MAP), thiol–ene click chemistry, doping of GO with different metal ions for chemical crosslinking, etc. Moreover, antimicrobial nanoparticles like silver, ammonium salts and TiO 2 has also been used with graphene 115b,122.…”

Graphene-based fabrics and their applications: a review

“…have been deposited to obtain photocatalytic fabrics [54,56,57]. Under irradiation, Molina et al [57] developed RGO-coated PES fabrics and coated them with commercial…”

“…Under irradiation, Molina et al [57] developed RGO-coated PES fabrics and coated them with commercial…”

“…The application of semiconducting nanoparticles on G fabrics should be studied in more depth, since mainly TiO2 nanoparticles have been applied [54,56,57,74]. With the functionalization by other semiconductors, G fabrics could be employed as photocatalytic materials or could be integrated in solar cells to increase the energy conversion efficiency [61,87,95].…”

“…BSA, which is a pH sensitive protein, has been widely employed for this objective [37,40,45,49,57,58,62]. Below pH 4.9 it has positive charge and above pH 4.9 negative charge.…”