TY  - CONF
AU  - Milojković, Natalija
AU  - Simović, Bojana
AU  - Žunić, Milan
AU  - Radovanovic, Lidija
AU  - Dapčević, Aleksandra
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2146
AB  - It is well known that titanium dioxide is usually used as a photocatalyst due to its
nontoxicity, low cost, and stability. Conductive polymer, polypyrrole (PPy) is also
appropriate for photocatalytic application being stable and easy to synthesize. The aim of
this study was to obtain TiO2/PPy composites reaching higher photocatalytic efficiency
compared to pure TiO2. Therefore, TiO2 was synthesized by the hydrothermal route,
while PPy was obtained by the chemical oxidative polymerization method. TiO2/x% PPy
nanocomposites (x = 0, 0.5, 1, 1.5, 3, 5 wt.%) were prepared by hand-mixing of powders
in agate mortar for 30 min in order to find the optimal PPy content. Obtained materials
were characterized by XRD, FTIR, TG/DSC, FESEM, and UV-Vis methods while their
photocatalytic activity was estimated towards degradation of Reactive Orange 16 dye
(RO16). A kinetic study was performed and a detailed mechanism of RO16
photocatalytic degradation in the presence of TiO2/PPy composites was proposed based
on scavenger tests. The results showed that, despite PPy addition, TiO2 was present in
anatase form in all samples with sufficiently small crystallites (around 26 nm) and
preserved structure with no significant deviations in unit cell parameters. The band gap
energy decreased with increasing of PPy content, from 3.14 eV for pure TiO2 to 2.94 eV
for TiO2/5% PPy. All the obtained nanocomposites demonstrated higher photocatalytic
activity than pure TiO2, whereby TiO2/1% PPy nanocomposite was the most efficient by
degrading 99.6% of the dye for 105 min under simulated solar light. Therefore, the
amount of 1 wt.% should be consider as optimal amount of PPy in a composite. It is
established that the photodegradation of RO16 using TiO2/PPy nanocomposites follows
pseudo-first kinetic order. RO16 photocatalytic degradation mechanism in the presence
of TiO2/PPy nanocomposites can be well described by direct Z-scheme heterojunction
which has never been reported for TiO2/PPy system.
PB  - Faculty of Technology, University of Novi Sad, Serbia
C3  - 15th ECerS Conference for Young Scientists in Ceramics, Novi Sad, Serbia
T1  - Photocatalytic degradation of Reactive Orange 16 dye using TiO2/PPy nanocomposites under simulated solar light
SP  - 87
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2146
ER  - 

@conference{
author = "Milojković, Natalija and Simović, Bojana and Žunić, Milan and Radovanovic, Lidija and Dapčević, Aleksandra",
year = "2023",
abstract = "It is well known that titanium dioxide is usually used as a photocatalyst due to its
nontoxicity, low cost, and stability. Conductive polymer, polypyrrole (PPy) is also
appropriate for photocatalytic application being stable and easy to synthesize. The aim of
this study was to obtain TiO2/PPy composites reaching higher photocatalytic efficiency
compared to pure TiO2. Therefore, TiO2 was synthesized by the hydrothermal route,
while PPy was obtained by the chemical oxidative polymerization method. TiO2/x% PPy
nanocomposites (x = 0, 0.5, 1, 1.5, 3, 5 wt.%) were prepared by hand-mixing of powders
in agate mortar for 30 min in order to find the optimal PPy content. Obtained materials
were characterized by XRD, FTIR, TG/DSC, FESEM, and UV-Vis methods while their
photocatalytic activity was estimated towards degradation of Reactive Orange 16 dye
(RO16). A kinetic study was performed and a detailed mechanism of RO16
photocatalytic degradation in the presence of TiO2/PPy composites was proposed based
on scavenger tests. The results showed that, despite PPy addition, TiO2 was present in
anatase form in all samples with sufficiently small crystallites (around 26 nm) and
preserved structure with no significant deviations in unit cell parameters. The band gap
energy decreased with increasing of PPy content, from 3.14 eV for pure TiO2 to 2.94 eV
for TiO2/5% PPy. All the obtained nanocomposites demonstrated higher photocatalytic
activity than pure TiO2, whereby TiO2/1% PPy nanocomposite was the most efficient by
degrading 99.6% of the dye for 105 min under simulated solar light. Therefore, the
amount of 1 wt.% should be consider as optimal amount of PPy in a composite. It is
established that the photodegradation of RO16 using TiO2/PPy nanocomposites follows
pseudo-first kinetic order. RO16 photocatalytic degradation mechanism in the presence
of TiO2/PPy nanocomposites can be well described by direct Z-scheme heterojunction
which has never been reported for TiO2/PPy system.",
publisher = "Faculty of Technology, University of Novi Sad, Serbia",
journal = "15th ECerS Conference for Young Scientists in Ceramics, Novi Sad, Serbia",
title = "Photocatalytic degradation of Reactive Orange 16 dye using TiO2/PPy nanocomposites under simulated solar light",
pages = "87",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2146"
}

Milojković, N., Simović, B., Žunić, M., Radovanovic, L.,& Dapčević, A.. (2023). Photocatalytic degradation of Reactive Orange 16 dye using TiO2/PPy nanocomposites under simulated solar light. in 15th ECerS Conference for Young Scientists in Ceramics, Novi Sad, Serbia
Faculty of Technology, University of Novi Sad, Serbia., 87.
https://hdl.handle.net/21.15107/rcub_rimsi_2146

Milojković N, Simović B, Žunić M, Radovanovic L, Dapčević A. Photocatalytic degradation of Reactive Orange 16 dye using TiO2/PPy nanocomposites under simulated solar light. in 15th ECerS Conference for Young Scientists in Ceramics, Novi Sad, Serbia. 2023;:87.
https://hdl.handle.net/21.15107/rcub_rimsi_2146 .

Milojković, Natalija, Simović, Bojana, Žunić, Milan, Radovanovic, Lidija, Dapčević, Aleksandra, "Photocatalytic degradation of Reactive Orange 16 dye using TiO2/PPy nanocomposites under simulated solar light" in 15th ECerS Conference for Young Scientists in Ceramics, Novi Sad, Serbia (2023):87,
https://hdl.handle.net/21.15107/rcub_rimsi_2146 .