eprintid: 16040
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/60/40
datestamp: 2023-11-10 03:30:40
lastmod: 2023-11-10 03:30:40
status_changed: 2023-11-10 02:01:03
type: article
metadata_visibility: show
creators_name: Nong, L.X.
creators_name: Nguyen, V.H.
creators_name: Bach, L.G.
creators_name: Tran, T.V.
creators_name: Hong, S.S.
creators_name: Abdullah, B.
creators_name: Hien, N.K.
creators_name: Nguyen, T.D.
title: Crystal violet degradation over BiVO4 photocatalyst under visible light irradiation
ispublished: pub
keywords: Chromium compounds; Crystals; Equilibrium constants; Image enhancement; Irradiation; Light; Nanocrystalline materials; Photocatalysts; Photocatalytic activity; Photodegradation; Rate constants; Scanning electron microscopy; Tungstate minerals, Adsorption equilibrium constants; BiVO4; Crystal violet; Hydrothermal methods; Langmuir-Hinshelwood models; UV-vis diffuse reflectance spectra; Visible light; Visible-light irradiation, Bismuth compounds
note: cited By 5
abstract: Sigle phase scheelite-monoclinic BiVO4 materials with different morphologies were successfully fabricated via a facile hydrothermal process by controlling pH of the precursor. The photocatalytic properties of the as-prepared materials were assessed via the photodecomposition of crystal violet (CV) solution under a 60 W LED (Cree-L6) visible light irradiation. The Langmuir-Hinshelwood model was utilized to present kinetic behavior. The obtained BiVO4 exhibited a monoclinic crystalline structure and narrow bandgap energy (Eg = 2.3�2.6 eV), which were confirmed by the X-ray diffraction (XRD), Raman and UV-vis diffuse reflectance spectra (UV-vis DRS) results. From the scanning electron microscopy (SEM) results, BiVO4 morphologies could be facilely controlled by turning the pH value of the precursor. When pH = 0.3, the BiVO4 products showed spherical morphologies with particle sizes in the range of 1�5 µm. Rod- and spherical like-BiVO4 products were obtained when the pH of the precursor was adjusted to 3. Moreover, BiVO4 with nanoparticles could be prepared under the pH of 5�7, whereas leaf-like morphologies could be achieved when pH = 9. The photocatalytic test showed that the adsorption equilibrium constant depended on the morphologies of the BiVO4 products and the reaction rate constant was reached the highest level at pH = 3. This outcome indicated that the enhanced performance of BiVO4 significantly depended on the morphologies of the BiVO4 products and the effective suppression of photo-excited electrons and holes. © 2019 Taylor & Francis Group, LLC.
date: 2021
publisher: Taylor and Francis Ltd.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076457821&doi=10.1080%2f00986445.2019.1674823&partnerID=40&md5=44e13b1ada55e052dca3e136318155d0
id_number: 10.1080/00986445.2019.1674823
full_text_status: none
publication: Chemical Engineering Communications
volume: 208
number: 4
pagerange: 530-538
refereed: TRUE
issn: 00986445
citation:   Nong, L.X. and Nguyen, V.H. and Bach, L.G. and Tran, T.V. and Hong, S.S. and Abdullah, B. and Hien, N.K. and Nguyen, T.D.  (2021) Crystal violet degradation over BiVO4 photocatalyst under visible light irradiation.  Chemical Engineering Communications, 208 (4).  pp. 530-538.  ISSN 00986445