TY - JOUR
T1 - Preparation of coupled ZnO/SnO 2 photocatalysts using a rotating packed bed
AU - Lin, Chia Chang
AU - Chiang, Yu Ju
PY - 2012/2/1
Y1 - 2012/2/1
N2 - Zn(OH) 2/Sn(OH) 4 was prepared by continuously pumping two aqueous solutions of ZnSO 4/SnCl 4 and NaOH into a rotating packed bed (RPB), where co-precipitation occurred to form Zn(OH) 2/Sn(OH) 4. Coupled ZnO/SnO 2 photocatalysts were formed by calcining these precursors (Zn(OH) 2/Sn(OH) 4) at 600°C for 10h. The photocatalytic activity of coupled ZnO/SnO 2 photocatalysts, evaluated using the photocatalytic degradation of methylene blue, was found to be related to the molar ratio of zinc salt to tin salt, the concentrations of the reactants, the concentration of the precipitant, the rotating speed of the RPB, the flow rates of the reactants and precipitant, and the zinc source. The photocatalytic activity of coupled ZnO/SnO 2 photocatalysts was highest at ZnSO 4 and SnCl 4 concentrations of 0.10mol/kg and 0.05mol/kg, respectively, an NaOH concentration of 0.40mol/kg, a rotating speed of 600rpm, and flow rates of the solutions of ZnSO 4/SnCl 4 and NaOH of 500mL/min. The photocatalytic degradation of methylene blue using coupled ZnO/SnO 2 photocatalysts obeyed the pseudo-first-order kinetic model.
AB - Zn(OH) 2/Sn(OH) 4 was prepared by continuously pumping two aqueous solutions of ZnSO 4/SnCl 4 and NaOH into a rotating packed bed (RPB), where co-precipitation occurred to form Zn(OH) 2/Sn(OH) 4. Coupled ZnO/SnO 2 photocatalysts were formed by calcining these precursors (Zn(OH) 2/Sn(OH) 4) at 600°C for 10h. The photocatalytic activity of coupled ZnO/SnO 2 photocatalysts, evaluated using the photocatalytic degradation of methylene blue, was found to be related to the molar ratio of zinc salt to tin salt, the concentrations of the reactants, the concentration of the precipitant, the rotating speed of the RPB, the flow rates of the reactants and precipitant, and the zinc source. The photocatalytic activity of coupled ZnO/SnO 2 photocatalysts was highest at ZnSO 4 and SnCl 4 concentrations of 0.10mol/kg and 0.05mol/kg, respectively, an NaOH concentration of 0.40mol/kg, a rotating speed of 600rpm, and flow rates of the solutions of ZnSO 4/SnCl 4 and NaOH of 500mL/min. The photocatalytic degradation of methylene blue using coupled ZnO/SnO 2 photocatalysts obeyed the pseudo-first-order kinetic model.
KW - Methylene blue
KW - Photocatalysts
KW - Rotating packed bed
KW - ZnO/SnO
UR - https://www.scopus.com/pages/publications/84856329804
U2 - 10.1016/j.cej.2011.11.062
DO - 10.1016/j.cej.2011.11.062
M3 - 文章
AN - SCOPUS:84856329804
SN - 1385-8947
VL - 181-182
SP - 196
EP - 205
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -