Open AccessPhotocatalytic Activity of ZnO-doped Geopolymer Paste
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/864/1/012038
Subject(s) - photocatalysis , geopolymer , materials science , sodium silicate , sodium hydroxide , doping , fly ash , chemical engineering , nanoparticle , nuclear chemistry , composite material , nanotechnology , chemistry , organic chemistry , catalysis , optoelectronics , engineering
This study aims to investigate the photocatalytic activity of ZnO nanoparticles as photocatalyst material which was doped onto a geopolymer paste. ZnO-doped geopolymer paste were prepared by mixing Class F fly ash and various amount of ZnO nanoparticles with alkali activator, which is combination of sodium hydroxide solution with sodium silicate. Meanwhile, geopolymer paste without ZnO was produced by mixing Class F fly ash and alkali activator. Then, both samples were cured in room temperature and aged for 28 days. The photocatalytic activity for geopolymer paste with and without ZnO nanoparticles were evaluated and compared through photocatalytic testing and discolouration testing. The experimental results revealed that, as increasing the amount of addition ZnO nanoparticles, the degradation of methylene blue also was increased. However, mineralogical determination of ZnO-doped geopolymer paste were characterized using X-ray Diffraction (XRD).