Photocatalytic activity of layered MoS2 in the reductive degradation of bromophenol blue

Joanna Kisała; Ana M. Ferraria; Nataliya Mitina; Bogumił Cieniek; Piotr Krzemiński; Dariusz Pogocki; Roman Nebesnyi; Oleksandr Zaichenko; Yaroslav Bobitski

doi:10.1039/D2RA03362C

Photocatalytic activity of layered MoS₂ in the reductive degradation of bromophenol blue†

Joanna Kisała,

*^a Ana M. Ferraria,

^bc Nataliya Mitina,^d Bogumił Cieniek,

^e Piotr Krzemiński,

^f Dariusz Pogocki,

^g Roman Nebesnyi,^h Oleksandr Zaichenko^d and Yaroslav Bobitski^fi

Author affiliations

* Corresponding authors

^a Department of Biology, Institute of Biology and Biotechnology, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland
E-mail: jkisala@ur.edu.pl

^b BSIRG-iBB-Institute for Bioengineering and Biosciences, Universidade de Lisboa, 1049-001 Lisbon, Portugal

^c Associate Laboratory i4HB—Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal

^d Department of Organic Chemistry, Institute of Chemistry and Chemical Technologies, Lviv Polytechnic National University, 79013 Lviv, Ukraine

^e Institute of Materials Science, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-959 Rzeszow, Poland

^f Centre for Microelectronics and Nanotechnology, Institute of Physics, University of Rzeszow, Pigonia 1, 35-959 Rzeszow, Poland

^g Institute of Nuclear Chemistry and Technology, Dorodna 16, Warsaw, Poland

^h Technology of Organic Products Department, Lviv Polytechnic National University, 12S. Bandera St., Lviv, Ukraine

ⁱ Department of Photonics, Lviv Polytechnic National University, 1 Sviatoho Yura Sq., 79013 Lviv, Ukraine

Abstract

Molybdenum disulphide (MoS₂) is a layered material with interesting photocatalytic properties. In this study, a layered MoS₂ was produced using a hydrothermal method. The obtained material was characterised by XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), SEM (scanning electron microscopy), UV-Vis spectroscopy, DLS (dynamic light scattering), and zeta potential analysis. For the evaluation of the photocatalytic properties of layered MoS₂, a solution of bromophenol blue (BPB) and the catalyst was illuminated for 120 minutes. According to the experimental results, MoS₂ exhibited excellent catalytic activity in BPB degradation. The MoS₂ preparation method enabled improved light harvesting, avoided fast charge recombination (related to bulk MoS₂), and created a large number of suitable electron transfer sites for photocatalytic reactions. Simulation of BPB decay and bromide production was carried out for a further understanding of MoS₂ photocatalytic action. The simulation results proved the reduction mechanism of BPB photodegradation.

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Photocatalytic activity of layered MoS₂ in the reductive degradation of bromophenol blue†

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