TY  - JOUR
SN  - 00986445
N2  - 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 = 2.3â??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 1â??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 5â??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.
IS  - 4
KW  - Chromium compounds; Crystals; Equilibrium constants; Image enhancement; Irradiation; Light; Nanocrystalline materials; Photocatalysts; Photocatalytic activity; Photodegradation; Rate constants; Scanning electron microscopy; Tungstate minerals
KW  -  Adsorption equilibrium constants; BiVO4; Crystal violet; Hydrothermal methods; Langmuir-Hinshelwood models; UV-vis diffuse reflectance spectra; Visible light; Visible-light irradiation
KW  -  Bismuth compounds
TI  - Crystal violet degradation over BiVO4 photocatalyst under visible light irradiation
ID  - scholars16040
EP  - 538
SP  - 530
PB  - Taylor and Francis Ltd.
AV  - none
Y1  - 2021///
N1  - cited By 5
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076457821&doi=10.1080%2f00986445.2019.1674823&partnerID=40&md5=44e13b1ada55e052dca3e136318155d0
A1  - Nong, L.X.
A1  - Nguyen, V.H.
A1  - Bach, L.G.
A1  - Tran, T.V.
A1  - Hong, S.S.
A1  - Abdullah, B.
A1  - Hien, N.K.
A1  - Nguyen, T.D.
JF  - Chemical Engineering Communications
VL  - 208
ER  -