Sonochemical synthesis of WS2 nanosheets and its application in sonocatalytic removal of organic dyes from water solution
| Autor: | Paria Eghbali, Aydin Hassani, Mahsa Haddad Irani-nezhad, Alireza Khataee |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Diffuse reflectance infrared fourier transform Scanning electron microscope Organic Chemistry Tungsten disulfide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis Inorganic Chemistry chemistry.chemical_compound chemistry Chemical Engineering (miscellaneous) Environmental Chemistry Radiology Nuclear Medicine and imaging Fourier transform infrared spectroscopy 0210 nano-technology High-resolution transmission electron microscopy Spectroscopy Methylene blue Nuclear chemistry |
| Zdroj: | Ultrasonics Sonochemistry. 48:329-339 |
| ISSN: | 1350-4177 |
| DOI: | 10.1016/j.ultsonch.2018.06.003 |
| Popis: | In this research, tungsten disulfide (WS2) nanosheets as sonocatalyst were synthesized through a sonochemical route. Characterization of as-synthesized sonocatalyst was carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM), electron dispersive X-ray spectroscopy (EDX), Dot-mapping, high resolution transmission electron microscopy (HRTEM), Brunauer-Emmett-Teller (BET), Fourier transform infrared spectroscopy (FTIR), and ultraviolet-visible diffuse reflectance spectroscopy (UV–vis DRS) analysis. WS2 nanosheets were evaluated for their sonocatalytic performance in order to remove basic violet 10 (BV10) under ultrasonic irradiation. The removal efficiency was maximized (94.01%) via the use of 1 g L−1 catalyst and 10 mg L−1 BV10 at pH = 4.5 and an ultrasonic power of 400 W within a reaction time of 150 min. In addition to BV10, the sonocatalytic elimination for a number of organic dyes viz. direct blue 71, acid blue 92, methylene blue, basic orange 2 and basic red 46 was examined to demonstrate the performance of WS2 nanosheets under the ultrasonic irradiation. The experimentation of trapping was conducted using edetate disodium (EDTA-2Na), tert-butyl alcohol (t-BuOH), and benzoquinone (BQ). According to the results, all radicals participated in the sonocatalytic activity. OH played a more prominent role than h+ and O 2 - ∙ in the process of BV10 separation. Following five repetitive runs, the nanocomposites revealed a reusability of circa 18% drop in the elimination efficiency. The main removal intermediates were recognized by GC–MS technique. |
| Databáze: | OpenAIRE |
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