TY - JOUR
T1 - Selective synthesis of monoclinic bismuth vanadate powders by surfactant-assisted co-precipitation method: Study of their electrochemical and photocatalytic properties
AU - García-Pérez, U. M.
AU - Sepúlveda-Guzmán, S.
AU - Martínez- de la Cruz, A.
AU - Peral, J.
PY - 2012/12/1
Y1 - 2012/12/1
N2 - Monoclinic bismuth vanadate powders were selectively synthesized by surfactant-assisted co-precipitation method. The triblock copolymers EO19PO19EO19 (Pluronic P-123) and EO100PO65EO100 (Pluronic F-127) were utilized as morphology-directing templates. The as-synthesized samples were characterized by means of techniques such as X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and nitrogen adsorption-desorption isotherms (BET method). The quasi-Fermi potential of electrons of samples was determined through pH dependent photovoltage measurements. Moreover, the influence and effect of concentration of the surfactant on the morphology of the obtained materials were investigated. Experimental results indicate that self-assembling balls of m-BiVO4 particles with an average size of 800 nm can be obtained at 200°C by using Pluronic P-123 in the co-precipitation process. The mechanism of formation of the as-prepared m-BiVO4 samples has also been proposed. Rhodamine B photodegradation was used to evaluate the photoactivity of the samples under visible-light irradiation. © 2012 by ESG.
AB - Monoclinic bismuth vanadate powders were selectively synthesized by surfactant-assisted co-precipitation method. The triblock copolymers EO19PO19EO19 (Pluronic P-123) and EO100PO65EO100 (Pluronic F-127) were utilized as morphology-directing templates. The as-synthesized samples were characterized by means of techniques such as X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and nitrogen adsorption-desorption isotherms (BET method). The quasi-Fermi potential of electrons of samples was determined through pH dependent photovoltage measurements. Moreover, the influence and effect of concentration of the surfactant on the morphology of the obtained materials were investigated. Experimental results indicate that self-assembling balls of m-BiVO4 particles with an average size of 800 nm can be obtained at 200°C by using Pluronic P-123 in the co-precipitation process. The mechanism of formation of the as-prepared m-BiVO4 samples has also been proposed. Rhodamine B photodegradation was used to evaluate the photoactivity of the samples under visible-light irradiation. © 2012 by ESG.
KW - BiVO 4
KW - Co-precipitation
KW - Heterogeneous photocatalysis
KW - Quasi-Fermi potential
M3 - Article
SN - 1452-3981
VL - 7
SP - 9622
EP - 9632
JO - International Journal of Electrochemical Science
JF - International Journal of Electrochemical Science
IS - 10
ER -