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

RSC Adv. 2022 Aug 11;12(35):22465-22475. doi: 10.1039/d2ra03362c. eCollection 2022 Aug 10.

Authors

Joanna Kisała¹, Ana M Ferraria^{2

3}, Nataliya Mitina⁴, Bogumił Cieniek⁵, Piotr Krzemiński⁶, Dariusz Pogocki⁷, Roman Nebesnyi⁸, Oleksandr Zaichenko⁴, Yaroslav Bobitski^{6

9}

Affiliations

¹ Department of Biology, Institute of Biology and Biotechnology, University of Rzeszow Pigonia 1 35-310 Rzeszow Poland jkisala@ur.edu.pl.
² BSIRG-iBB-Institute for Bioengineering and Biosciences, Universidade de Lisboa 1049-001 Lisbon Portugal.
³ Associate Laboratory i4HB-Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa 1049-001 Lisboa Portugal.
⁴ Department of Organic Chemistry, Institute of Chemistry and Chemical Technologies, Lviv Polytechnic National University 79013 Lviv Ukraine.
⁵ Institute of Materials Science, College of Natural Sciences, University of Rzeszow Pigonia 1 35-959 Rzeszow Poland.
⁶ Centre for Microelectronics and Nanotechnology, Institute of Physics, University of Rzeszow Pigonia 1 35-959 Rzeszow Poland.
⁷ Institute of Nuclear Chemistry and Technology Dorodna 16 03-195 Warsaw Poland.
⁸ Technology of Organic Products Department, Lviv Polytechnic National University 12S. Bandera St. Lviv 79013 Ukraine.
⁹ 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.