Open AccessPhotocatalytic Behaviour of TiO2-geopolymer Paste under Sunlight
Author(s) -
Siti Norsaffirah Zailan,
Norsuria Mahmed,
Mohd Mustafa Al Bakri Abdullah
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/957/1/012006
Subject(s) - photocatalysis , sodium silicate , geopolymer , materials science , titanium dioxide , sodium hydroxide , photodegradation , titanium oxide , chemical engineering , nuclear chemistry , sunlight , composite material , fly ash , chemistry , catalysis , organic chemistry , engineering , physics , astronomy
The photocatalytic degradation of methylene blue (MB) of the geopolymer paste with addition nanoparticles titanium dioxide (TiO 2 ) was investigated under illumination of sunlight radiation. In this work, TiO 2 -based geopolymer paste was prepare by dry mixing of Class F fly ash (FA) and different amount of nano-TiO 2 (0, 2.5, 5.0, 10.0 & 15.0 wt%). Then, the alkali activator, which is combination of sodium hydroxide solution with sodium silicate was added to the dry mix FA-TiO 2 with ratio of 2.5. All the sample was cured at room temperature and aged for 28 days. The photocatalytic behaviour of nano-TiO 2 was evaluated and compared through photocatalytic testing and surface degradation testing by measuring the photodegradation of MB under sunlight rays. The experimental results revealed that the addition of nano-TiO 2 to the geopolymer paste shows excellent result on photocatalytic degradation of MB after exposure to sunlight up to 150 minutes.