Robust CA-GO-TiO2/PTFE Photocatalytic Membranes for the Degradation of the Azithromycin Formulation from Wastewaters

We have developed an innovative thin-film nanocomposite membrane that contains cellulose acetate (CA) with small amounts of TiO2-decorated graphene oxide (GO) (ranging from 0.5 wt.% to 2 wt.%) sandwiched between two polytetrafluoroethylene (PTFE)-like thin films. The PTFE-like films succeeded in mai...

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Published inPolymers Vol. 16; no. 10; p. 1368
Main Authors Satulu, Veronica, Pandele, Andreea Madalina, Ionica, Giovanina-Iuliana, Bobirică, Liliana, Bonciu, Anca Florina, Scarlatescu, Alexandra, Bobirică, Constantin, Orbeci, Cristina, Voicu, Stefan Ioan, Mitu, Bogdana, Dinescu, Gheorghe
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 10.05.2024
Subjects
Antibiotics
azithromycin formulation
Carbon
Catalytic activity
Cellulose acetate
cellulose acetate with TiO2-decorated graphene oxide membranes
Chemical bonds
Chemical composition
Consumption
Coronaviruses
Efficiency
Fluorine
Graphene
Light
Membranes
Nanocomposites
Nanoparticles
Oxidation
Pandemics
Pharmaceutical industry
Photocatalysis
Photodegradation
Pollutants
polytetrafluorethylene thin films
Polytetrafluoroethylene
Process controls
Thin films
Titanium dioxide
wastewater treatment
Water treatment
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Summary:We have developed an innovative thin-film nanocomposite membrane that contains cellulose acetate (CA) with small amounts of TiO2-decorated graphene oxide (GO) (ranging from 0.5 wt.% to 2 wt.%) sandwiched between two polytetrafluoroethylene (PTFE)-like thin films. The PTFE-like films succeeded in maintaining the bulk porosity of the support while increasing the thermal and chemical robustness of the membrane and boosting the catalytic activity of TiO2 nanoparticles. The membranes exhibited a specific chemical composition and bonding, with predominant carbon–oxygen bonds from CA and GO in the bulk, and carbon–fluorine bonds on their PTFE-like coated sides. We have also tested the membranes’ photocatalytic activities on azithromycin-containing wastewaters, demonstrating excellent efficiency with more than 80% degradation for 2 wt.% TiO2-decorated GO in the CA-GO-TiO2/PTFE-like membranes. The degradation of the azithromycin formulation occurs in two steps, with reaction rates being correlated to the amount of GO-TiO2 in the membranes.
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ISSN:2073-4360
2073-4360
DOI:10.3390/polym16101368