Ultrasonic degradation of selected dyes using Ti3C2Tx MXene as a sonocatalyst

Byung Moon Jun, Jonghun Han, Chang Min Park, Yeomin Yoon

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47 Scopus citations

Abstract

MXene, a new family of two dimensional materials, was utilized as a sonocatalyst in an ultrasonic treatment (US) process for removal of methylene blue (MB) and acid blue 80 (AB). The physico-chemical properties of MXene were characterized using scanning electron microscopy, transmission electron microscopy, porosimetry, and a zeta potential analyzer. Degradation of dyes by US was systemically investigated under several experimental conditions including: power density of US (45, 90, 135, and 180 W L−1), frequency of US (28 and 970 kHz), pH of dye solution (3.5, 7, and 10.5), solution temperature (293, 303, and 313 K), and addition of hydroxyl radical promotor (H2O2) and scavenger (t-BuOH) to concentrations of 25 mM. Based on the experimental results, the quantity of H2O2, which was used as an indicator of hydroxyl radical concentration, was an important factor in determining the degradation rate of MB and AB in this US study. Additionally, synergetic indices for removal of both dyes were higher than 1.0 in all cases, indicating the outstanding efficiency of MXene as a sonocatalyst in the US reactor for removal of both, due to an increase in both (i) the quantity of H2O2 in the US reactor and (ii) active sites for adsorbates from dispersion effects. A stability test on MXene in the US process was conducted using X-ray diffraction and five-cycle recycling performance tests. Based on our experimental data, MXene can be utilized as a sonocatalyst in the US process for a high removal rate for dyes (e.g., MB).

Original languageEnglish
Article number104993
JournalUltrasonics Sonochemistry
Volume64
DOIs
StatePublished - Jun 2020

Bibliographical note

Funding Information:
This research was funded by the Korea Ministry of Environment (The SEM projects; 2018002470005, South Korea). This research was also supported by the Korea Environment Industry & Technology Institute (KEITI) through Plant Research Program, funded by Korea Ministry of Environment (MOE) (1485016267, South Korea).

Funding Information:
This research was funded by the Korea Ministry of Environment (The SEM projects; 2018002470005 , South Korea). This research was also supported by the Korea Environment Industry & Technology Institute ( KEITI ) through Plant Research Program, funded by Korea Ministry of Environment (MOE) ( 1485016267 , South Korea).

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

  • Acid blue 80
  • Methylene blue
  • MXene
  • Sonocatalytic degradation
  • Wastewater treatment

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