Ying  Pei Lim, Ying  Chin Lim, Devagi  Kanakaraju, Huey  Ling Tan, 
    Enhanced Photocatalytic Degradation of Methyl Orange using
Ag-Doped TiO<SUB>2</SUB> Photocatalyst,
    Journal of Engineering and Applied Sciences,
    Volume 13,Issue 12,
    2018,
    Pages 4406-4413,
    ISSN 1816-949x,
    jeasci.2018.4406.4413,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2018.4406.4413)
    Abstract: In the present study, Ag-doped Titanium dioxide (Ag-TiO<SUB>2</SUB> ) photocatalyst was prepared by wet 
impregnation method. The effect of dopant concentration, incubation temperature and incubation time on the
photocatalytic degradation of Methyl Orange (MO) in aqueous suspension under Ultra Violet (UV) light
irradiation were studied systematically. The synthesized photocatalyst was characterized using XRD and
SEM-EDX mapping. The characterization results confirmed that Ag was successfully doped into TiO<SUB>2</SUB> with 
anatase phase structure. The Ag-TiO<SUB>2</SUB> photocatalyst exhibited the highest dye removal of 85% efficiency with 
5 wt.% dopant concentration when the incubation temperature and time were 70°C and 8 h, respectively. The
kinetic study revealed that photocatalytic reaction follows Langmuir Hinshelwood (L-H) Model and
pseudo-first order law with the highest regression coefficient of 0.992. Ag-TiO<SUB>2</SUB> was found to be an 
efficient photocatalyst showing enhanced photocatalytic activity for MO decolorization under UV
irradiation.
    Keywords: Dye;titanium oxide;doping;photocatalyst;photodegradation;Ag-TiO2