TITLE:
Synthesis of Al2S3/MoS2 Nanocomposite by Electrochemical Method: Correlation for Photodegradation of Trichloroacetic Acid, Chloroacetic Acid, Acetic Acid and Study of Antibacterial Efficiency
AUTHORS:
Hiremarali Sathyanarayana Sindhushree, Kodenakoppalu Mahadevappa Chaithra, Rayapura Thimmegowda Radhika, Bellale Marigowda Venkatesha
KEYWORDS:
Electrochemical Method, Al2S3/MoS2, Nanoparticles, Carboxylic Acids, LFER, Antibacterial Activity
JOURNAL NAME:
Modern Research in Catalysis,
Vol.12 No.1,
January
31,
2023
ABSTRACT: Al2S3/MoS2 nanocomposite has been synthesized through electrochemical method and characterized by UV-Visible spectroscopy, XRD, SEM and EDAX data. UV-Visible spectroscopy measurements
reveal that the Al2S3/MoS2 nanocomposite has maximum absorption at 353.04 nm and this peak position
reflects the band gap of particles and it is found to be 2.51 eV which was
calculated using Tauc plot. X-Ray diffraction (XRD) reveals crystaline size to
be 49.85 nm which was calculated using Williamson-Hall (W-H) plot method. Photocatalytic
degradation of acetic acid, chloroacetic acid and trichloroacetic acid has been
studied by volumetric method using NaOH solution. Photocatalytic degradation of
chloroacetic acid and acetic acid follows first order kinetics. The
photodegradation efficiency for Al2S3/MoS2 nanocomposite was found to be ≈97.8%. A Taft linear free energy relationship is
noted for the catalysed reaction with ρ* = 0.233 and indicating electron
withdrawing groups enhance the rate. An isokinetic relation is observed
with β = 358 K indicating that enthalpy factor controls the reaction rate.
The result of this paper suggests the possibility of degradation of
organic compounds, industrial effluants and toxic organic compounds by
photodegradation process by ecofriendly Al2S3/ MoS2.
The antibacterial activity of Al2S3/MoS2 nanocomposite was investigated. These particles were shown to have an effective
bactericide.