eprintid: 14467
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/44/67
datestamp: 2023-11-10 03:29:03
lastmod: 2023-11-10 03:29:03
status_changed: 2023-11-10 01:56:59
type: article
metadata_visibility: show
creators_name: Steven, T.
creators_name: Nawaz, R.
creators_name: Sahrin, N.T.
creators_name: Lee, K.M.
creators_name: Bianchi, C.L.
creators_name: Kait, C.F.
title: H2O2-assisted sonophotocatalytic degradation of diclofenac using a visible light-active flower-like micron-sized TiO2 photocatalyst
ispublished: pub
note: cited By 5
abstract: The recovery of TiO2nanoparticles after utilization is a major challenge that hinders the wide-scale implementation of photocatalytic technology in wastewater treatment. In this study, an easily recoverable flower-shaped micron-sized TiO2(MST) photocatalyst was synthesized from nano-sized TiO2seeds via a hydrothermal process. The synthesized MST photocatalyst displayed an average particle size of 1.577 μm with 2.7 eV bandgap energy and 100.18 m2/g surface area. The photocatalytic performance of the synthesized material was evaluated for the degradation of diclofenac (DCF) from aqueous solution under visible light. The degradation efficiency under visible light reached 52.87 in 120 min. When photocatalysis was coupled with ultrasonication (US), namely sonophotocatalysis, the DCF degradation efficiency increased to 62.61. The highest DCF degradation efficiency (86.92) was achieved under the optimized conditions of 30 kHz US frequency, 0.4 g/L of TiO2loading, 10 ppm initial concentration of DCF, and 1.0 mM H2O2dosage. The synergy index of sonophotocatalysis was 1.25, indicating the synergistic effects of both sonocatalysis and photocatalysis on DCF degradation efficiency. The MST photocatalyst was easily recovered through centrifugation after reaction and reused for another two cycles of sonophotocatalysis. The photocatalyst was significantly stable under these process conditions, with only a 5.19 decrease in degradation after three consecutive cycles. © 2021 Malaysian Institute of Chemistry. All rights reserved.
date: 2021
publisher: Malaysian Institute of Chemistry
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117833843&partnerID=40&md5=92354b56cf21889d79ec4c74a8b56d15
full_text_status: none
publication: Malaysian Journal of Chemistry
volume: 23
number: 3
pagerange: 108-125
refereed: TRUE
issn: 15112292
citation:   Steven, T. and Nawaz, R. and Sahrin, N.T. and Lee, K.M. and Bianchi, C.L. and Kait, C.F.  (2021) H2O2-assisted sonophotocatalytic degradation of diclofenac using a visible light-active flower-like micron-sized TiO2 photocatalyst.  Malaysian Journal of Chemistry, 23 (3).  pp. 108-125.  ISSN 15112292