TY - JOUR
T1 - Sonochemical synthesis of WS2 nanosheets and its application in sonocatalytic removal of organic dyes from water solution
AU - Khataee, Alireza
AU - Eghbali, Paria
AU - Irani-Nezhad, Mahsa Haddad
AU - Hassani, Aydin
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/11
Y1 - 2018/11
N2 - 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. [rad]OH played a more prominent role than h+ and O2 -∙ 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.
AB - 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. [rad]OH played a more prominent role than h+ and O2 -∙ 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.
KW - Organic dyes
KW - Sonocatalyst
KW - Sonocatalytic removal
KW - Wastewater treatment
KW - Water solution
KW - WS nanosheets
UR - http://www.scopus.com/inward/record.url?scp=85049059267&partnerID=8YFLogxK
U2 - 10.1016/j.ultsonch.2018.06.003
DO - 10.1016/j.ultsonch.2018.06.003
M3 - Article
C2 - 30080558
AN - SCOPUS:85049059267
SN - 1350-4177
VL - 48
SP - 329
EP - 339
JO - Ultrasonics Sonochemistry
JF - Ultrasonics Sonochemistry
ER -
