화학공학소재연구정보센터
Current Applied Physics, Vol.20, No.1, 23-28, 2020
Tailoring titanium dioxide by silver particles for photocatalysis
Titanium dioxide-silver (TiO2-Ag) composites are synthesized by using the hydrothermal method with different weight ratios for photocatalyst applications. With the introduction of Ag, the composites exhibited absorbance in visible region, and the bandgap also decreased by 0.45 eV. The TiO2-Ag composite with 5:7 ratio shows the best photocatalytic degradation of methylene blue, the highest photocurrent response, and the lowest electrochemical impedance, thus exhibiting the best photocatalytic performance. The introduction of Ag into TiO2 retards the recombination time of the photo-generated electrons and holes as well as increases the charge transfer rate at interfaces of the composites.