Akademik Veri Yönetim Sistemi
Global Summit on Advanced Materials and Sustainable Energy (G-AMSE22) , Van, Türkiye, 3 - 04 Ekim 2022, ss.116
In this study, the efficiency
of α-Fe2O3/Kaolin nanocomposite on
malachite green (MG) decolorization by
heterogeneous fenton (HF) process was
investigated. α-Fe2O3/Kaolin nanocomposite
was synthesized via precipitation method
and characterized by FTIR and SEM/EDX
techniques. Operating parameters were
pH (3-9), catalyst dose (0.25-1.7 g/L) and
H2O2 dose (0.5-3.5 g/L). The catalytic
performance of nanocomposite was
evaluated via adsorption, H2O2 oxidation,
and HF processes. According to the SEM
analysis, α-Fe2O3 nanoparticles were well
decorated on the hexagonal platelet
structure of kaolin. According to the EDX
analysis C, O, Al, Si, and Fe were present in
the catalyst as 10.36%, 47.62%, 15.90%, 16.64%,
and 8.25% by weight, respectively. After the
HF process, the Fe ratio reduced to 3.63%
by weight, which shows the contribution of
iron to the Fenton oxidation reactions. Si-
OH, Si-O-Al, Si-O-Si, and Fe-O characteristic
bonds were observed via FTIR analysis. The
adsorption, H2O2, and HF processes were
efficient for the decolorization of MG with
67.1%, 70.09%, and 98.00%, respectively,
which verifies the catalytic activity of
nanocomposite. The optimum operating
conditions were determined as pH of 3,
catalyst dose of 1.2 g/L, and H2O2 dose of 1
g/L. Under optimum conditions, 98.00%
MG decolorization was achieved by the HF
process. The Kaolin provided a good surface
area for doped α-Fe2O3 nanoparticles, and
α-Fe2O3 contributed to HF oxidation with
the Fe3+/Fe2+ redox cycle. The satisfactory
decolorization of MG is possible with α-Fe2O3/
Kaolin nanocomposite with the HF process.