TY - JOUR
T1 - Photoreduction of Cr(VI) in water using Bi2O3- ZrO2 nanocomposite under visible light irradiation
AU - Vignesh, Kumaravel
AU - Priyanka, Rajarajan
AU - Rajarajan, Muthuramalingam
AU - Suganthi, Ayyadurai
PY - 2013/2/1
Y1 - 2013/2/1
N2 - Chromium(VI) is a common heavy metal pollutant and extensively used in variety of industrial processes. In the present study, bismuth oxide-zirconium oxide nanocomposite (Bi2O3-ZrO2) was synthesized to improve photoreduction of Cr(VI) under visible light irradiation. The synthesized photocatalyst was characterized by UV-visible-diffuse reflectance spectroscopy (UV-vis-DRS), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), Brunauer-Emmett-Teller (B.E.T) surface area analysis and photoluminescence spectroscopy (PL). Bi2O 3-ZrO2 was found to be more photoactive than Bi 2O3, ZrO2, TiO2 and ZnO for the reduction of Cr (VI). The influences of various reaction parameters like the effect of catalyst concentration, initial Cr(VI) concentration and addition of inorganic salts on the photocatalytic activity have been investigated in detail. Meanwhile, the stability of Bi2O3-ZrO2 was investigated by repeatedly performing Cr(VI) photoreducing experiments.
AB - Chromium(VI) is a common heavy metal pollutant and extensively used in variety of industrial processes. In the present study, bismuth oxide-zirconium oxide nanocomposite (Bi2O3-ZrO2) was synthesized to improve photoreduction of Cr(VI) under visible light irradiation. The synthesized photocatalyst was characterized by UV-visible-diffuse reflectance spectroscopy (UV-vis-DRS), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), Brunauer-Emmett-Teller (B.E.T) surface area analysis and photoluminescence spectroscopy (PL). Bi2O 3-ZrO2 was found to be more photoactive than Bi 2O3, ZrO2, TiO2 and ZnO for the reduction of Cr (VI). The influences of various reaction parameters like the effect of catalyst concentration, initial Cr(VI) concentration and addition of inorganic salts on the photocatalytic activity have been investigated in detail. Meanwhile, the stability of Bi2O3-ZrO2 was investigated by repeatedly performing Cr(VI) photoreducing experiments.
KW - Cr(VI) reduction
KW - Nanocomposite
KW - Photocatalysis
KW - Visible light
UR - http://www.scopus.com/inward/record.url?scp=84870914224&partnerID=8YFLogxK
U2 - 10.1016/j.mseb.2012.10.035
DO - 10.1016/j.mseb.2012.10.035
M3 - Article
AN - SCOPUS:84870914224
SN - 0921-5107
VL - 178
SP - 149
EP - 157
JO - Materials Science and Engineering: B
JF - Materials Science and Engineering: B
IS - 2
ER -