eprintid: 1273
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/12/73
datestamp: 2023-11-09 15:49:26
lastmod: 2023-11-09 15:49:26
status_changed: 2023-11-09 15:39:22
type: article
metadata_visibility: show
creators_name: Saepurahman, 
creators_name: Abdullah, M.A.
creators_name: Chong, F.K.
title: Dual-effects of adsorption and photodegradation of methylene blue by tungsten-loaded titanium dioxide
ispublished: pub
keywords: Adsorption capacities; Calcination temperature; DR-UV-vis; Environmental remediation; First order kinetics; High affinity; Kinetic study; Langmuir models; Methylene blue; Non-linear regression method; Optimum synthesis; Photo catalytic degradation; Photocatalytic activities; Photodegradation of methylene blue; Photoresponses; Surface modification; TiO; UV filter; Visible region, Adsorption; Calcination; Loading; Oxides; Photocatalysis; Photodegradation; Pollution; Titanium; Titanium dioxide, Tungsten
note: cited By 65
abstract: Surface modification of titanium dioxide (TiO2) with tungsten was carried out to increase the photocatalytic degradation of methylene blue (MB). The modified photocatalyst in dark experiment had high affinity towards MB with the amount adsorbed proportional to the tungsten loading and the highest adsorption was at 6.5 mol tungsten loading. The adsorption isotherm study showed that the adsorption followed Langmuir model with maximum adsorption capacity of 95.9 � 10-3 mmol g-1, 8-fold higher than the reported value for unmodified TiO2. Under illumination, the modified photocatalyst also enhanced the degradation of MB as compared to the unmodified one. Kinetic studies on the photocatalytic degradation of MB using linear and non-linear regression methods suggested that the degradation followed first order kinetics. The photocatalytic activity was greatly affected by the amount of tungsten loading, calcination temperature and calcination duration. The optimum synthesis condition was found at 1 mol tungsten loading and calcination at 450 °C for 2 h. Using UV filter, the DRUV-Vis analysis confirmed that the enhancement of the photocatalytic activity was not due to the extension of the photoresponse into the visible region. The presence of UV portion rather enhanced the photocatalytic activity. © 2010 Elsevier B.V. All rights reserved.
date: 2010
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-77649341204&doi=10.1016%2fj.cej.2010.01.010&partnerID=40&md5=6bac0c44bb733375ba090f29fd7e9f37
id_number: 10.1016/j.cej.2010.01.010
full_text_status: none
publication: Chemical Engineering Journal
volume: 158
number: 3
pagerange: 418-425
refereed: TRUE
issn: 13858947
citation:   Saepurahman and Abdullah, M.A. and Chong, F.K.  (2010) Dual-effects of adsorption and photodegradation of methylene blue by tungsten-loaded titanium dioxide.  Chemical Engineering Journal, 158 (3).  pp. 418-425.  ISSN 13858947