Photocatalytic and antibacterial activities of Tl-Hg-I nanocomposites: sonochemical synthesis and characterization.
Elham AbkarMohammad HassanpourOmid AmiriMojgan GhanbariMasoud Salavati-NiasariPublished in: RSC advances (2021)
Efforts to find new and practical solutions to improve water quality and treatment of industrial effluents are ongoing. In this study, Tl 4 HgI 6 /HgI 2 nanocomposites were synthesized by a rapid ultrasonic method to investigate their photocatalytic and antibacterial activity. Various synthesis conditions such as changes in the ratio of precursors, use of surfactants, and changes in the power and time of sonication to achieve particles with optimal size and morphology were performed. X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) analysis confirmed the purity and formation of the nanocomposite. Optimal nanoparticles in terms of size and morphology were selected by examining the images obtained from scanning electron microscopy (SEM) analysis. The nanocomposites obtained in the presence of PVP (polyvinylpyrrolidone) as a surfactant (sample no. 8) were selected as the optimal sample. Transmission electron microscopy (TEM), differential reflectance spectroscopy (DRS), Raman, N 2 adsorption/desorption analyzes were performed for the optimal sample to evaluate the properties of nanocomposites. The band-gap for Tl 4 HgI 6 /HgI 2 nanocomposites was calculated to be about 2.3 eV for HgI 2 and 3.1 eV for Tl 4 HgI 6 . The optimal sample was used to evaluate the photocatalytic activity for decolorizing an aqueous solution of six different organic dyes. Finally, for rhodamine B, the decolorization was about 80%. Also, Tl 4 HgI 6 /HgI 2 nanocomposite showed a significant inhibition zone in the antibacterial test. The maximum inhibition diameter of 50 mm was obtained against Streptococcus pyogenes . The results showed that Tl 4 HgI 6 /HgI 2 nanocomposites have good potential for many industrial applications.
Keyphrases
- computed tomography
- reduced graphene oxide
- electron microscopy
- visible light
- aqueous solution
- gold nanoparticles
- magnetic resonance imaging
- carbon nanotubes
- wastewater treatment
- high resolution
- heavy metals
- water quality
- silver nanoparticles
- single molecule
- magnetic resonance
- deep learning
- highly efficient
- risk assessment
- staphylococcus aureus
- machine learning
- escherichia coli
- candida albicans
- human health
- fluorescent probe
- anti inflammatory
- essential oil
- sensitive detection
- biofilm formation
- quantum dots
- convolutional neural network
- wound healing
- living cells
- gas chromatography mass spectrometry