Page 13 - Book of Abstracts

th
8 Biannual Conference on Chemistry - CHEM 08

Cu2O/TiO2 Enhanced Self-cleaning, Antibacterial Activity,
and UV Protection of Cotton Fiber under Sunlight
Mohamed M. Ibrahim

Taif University, College of Science, Chemistry Department
Corresponding author: ibrahim652001@yahoo.com

ABSTRACT

A facile synthesis of high
thermally stable nanocrystalline
anatase TiO2 NPs doped with
Cu2O NPs. A Z-scheme
mechanism was used to account
for the enhanced photocatalytic
activity exhibited by these
materials. Also, the
nanocomposite was impregnated
in cotton fabric to obtain a modified fiber with high thermal stability, self-
cleaning, enhanced UV protection, and antibacterial activity. The as-
prepared nanomaterials and the coated fabric were characterized by

various physicochemical techniques such as XRD, EDXRF, TGA, TEM,
HRTEM, and SEM. The Cu2O/TiO2 molar ratio in the nanocomposite was
found to possess a pronounced impact on the crystalline structure, size
and morphology of TiO2 NPs. The XRD revealed proper substitutions of
the few Ti sites by Cu ions in TiO2 host lattice. Optical measurements
4+
2+
showed that the plasmonic peak of the Cu2O/TiO2 nanocomposite was
affected by the copper-doping concentration, enhancing self-cleaning of
Cu2O/TiO2 under direct sunlight. The TiO2/fiber self-cleaning efficiency
(12 hrs for MB removal) was increased by the in situ growing of Cu2O (5.5
hrs). Antibacterial activity studies revealed high potential activity
of Cu2O/TiO2 against both Gram-positive (Staphylococcus aureus)
and Gram-negative (Escherichia Coli, Kleissella pneumonia, Saccharomyces
sp.) bacteria. The promising photocatalytic and biocidal activity of our
synthesized Cu2O/TiO2 nanocomposites was ascribed to the reactive
oxygen species generated by the Z-scheme mechanism under direct
Sunlight.
.

BOOK OF ABSTRACTS CHEM 08 (2020) Page 12