eprintid: 14987
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/49/87
datestamp: 2023-11-10 03:29:35
lastmod: 2023-11-10 03:29:35
status_changed: 2023-11-10 01:58:20
type: article
metadata_visibility: show
creators_name: John, P.
creators_name: Johari, K.
creators_name: Gnanasundaram, N.
creators_name: Appusamy, A.
creators_name: Thanabalan, M.
title: Enhanced photocatalytic performance of visible light driven TiO2/g-C3N4 for degradation of diclofenac in aqueous solution
ispublished: pub
keywords: Degradation; Efficiency; Effluents; Hole mobility; Optical properties; Oxide minerals; Photocatalytic activity; Photodegradation; Sewage treatment plants; Titanium dioxide; Wastewater treatment, Degradation efficiency; Emerging contaminant; Independent variables; Photocatalytic performance; Photodegradation efficiency; Pseudo-first order reactions; Response surface methodology; Wastewater treatment plants, Light
note: cited By 37
abstract: Emerging contaminants such as diclofenac is frequently detected in wastewater treatment plants as they are not specifically designed for the removal of pharmaceutical effluents, which results in poor removal efficiency. Even though photocatalyst has emerged as an excellent alternative, most of the reported photocatalyst portrays fast recombination rate of electron�hole pair and has slow electron mobility. In order to overcome these shortcomings, in the present work, visible light-driven TiO 2/g-C3N4 photocatalyst was synthesized for the photodegradation of diclofenac in aqueous solution. The morphological and optical properties of the photocatalyst were analysed. The photodegradation efficiency was highly improved even at low g-C3N4 loading, indicating the Z-scheme photocatalyst, successfully overcame the electron�hole pair's fast recombination rate. The photodegradation efficiency was represented as a function of all independent variables, using a second-order quadratic model. Response surface methodology (RSM) was used to optimize the degradation process. A maximum degradation efficiency (93.49) was achieved at the optimum conditions (irradiation time = 90 min, initial solution pH = 5, initial DCF concentration = 5 ppm and g-C3N4 loading = 0.3g/g TiO 2). The as developed photocatalyst is found to be highly stable as it showed a satisfactory recyclability. The process followed a pseudo-first-order reaction. Photodegradation of diclofenac also resulted in ten intermediates as identified using LCMS analysis. © 2021 Elsevier B.V.
date: 2021
publisher: Elsevier B.V.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101748071&doi=10.1016%2fj.eti.2021.101412&partnerID=40&md5=216452044bf782da933692a1ef5460b0
id_number: 10.1016/j.eti.2021.101412
full_text_status: none
publication: Environmental Technology and Innovation
volume: 22
refereed: TRUE
issn: 23521864
citation:   John, P. and Johari, K. and Gnanasundaram, N. and Appusamy, A. and Thanabalan, M.  (2021) Enhanced photocatalytic performance of visible light driven TiO2/g-C3N4 for degradation of diclofenac in aqueous solution.  Environmental Technology and Innovation, 22.   ISSN 23521864