Tin Decorated Zinc Sulphide Nanoparticles for Photocatalytic Degradation of Bromophenol Blue Dye and Their Therapeutic Applications: A Kinetic and Thermodynamic Approach

Abstract

Zinc sulphide (ZnS) and Tin-doped Zinc sulphide (Sn-ZnS) nanoparticles (NPs) were synthesized by co precipitation method. The produced NPs were characterized using UV-Vis spectroscopy, XRD, EDX,SEM, FTIR, TGA and Photoluminescence (PL) spectroscopy. With the addition of 3% Sn the band gap of ZnS reduced from 3.50 to 3.10 eV. TGA study revealed that synthesized NPs are very stable to temperature and the total weight loss was only 22.8% and 21.5% in ZnS and Sn-ZnS nanocatalyst. The photoluminescence (PL) intensity showed that with Tin-doping the peak in Sn-ZnS shifted to longer wavelength. The degradation of Bromophenol blue over both catalysts followed first order kinetics. The activation energy calculated for the photodegradation reaction was 53.2 and 67.55 kj/mol using pure ZnS and Sn-ZnS NPs, respectively. About 86% and 96% dye degradation was noticed in 300 minutes. A high percentage of dye degradation was found at low concentration (10 ppm) and at optimal dosage (0.03 g) of the catalyst. The rate of Bromophenol blue dye degradation was found to increase with increase in temperature (up to 70°C) and pH (9.5) of the medium. Sn-ZnS NPs showed good antibacterial and antioxidant activities compared to bare ZnS. Both nanoparticles are found to be non biocompatible.

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

“…Shah U. et al in their recent study 48 researched BPB photocatalytic degradation on two catalysts: zinc sulphide (ZnS) and tin-doped zinc sulphide (Sn–ZnS). About 86% and 96% dye degradation was observed in 300 min.…”

“…The degradation processes shown in papers [47][48][49][50] rely on photo-oxidation undergoing upon the UV-irradiation of highlyengineered nanomaterials. While our approach, based on photo-reduction, offers similar effectiveness of deuorination on material absorbing both UV and visible light.…”

Bi-functional role of high charge mobility with 2D/2D interactions for effective PEC and visible photocatalysis in NiO/MoS2 nanocomposites

“…The removal of dye during four cycles is 89.9%. [55][56][57][58][59][60][61] The degradation of colorless pollutant phenol was performed using 15.0% NiO/MoS 2 nanocomposite in order to eliminate the doubts of self-degradation and photosensitization. The degradation of phenol was performed for 5 h. The 15.0% NiO/MoS 2 nanocomposite degraded 64.0% phenol.…”

Porous Geopolymer/ZnTiO3/TiO2 Composite for Adsorption and Photocatalytic Degradation of Methylene Blue Dye

“…The bandgap energy is the energy difference of the valence band and the conduction band of a photocatalyst [ 14 ]. Among the semiconductors used in this process we have cadmium sulfide (CdS), titanium oxide (TiO 2 ), zinc oxide (ZnO) and zinc sulfide (ZnS) [ 15 ].…”

“…96-900-9231. On the other hand, Muscovite was determined to be monoclinic phase with unit cell parameters of a = 5.18 Å, b = 8.99 Å, and c = 20.23 Å, and space group C12/c1(15) according to the standard COD card No. 96-900-1058.…”