Sains Malaysiana, 2017;46:1390-1316.

Abstract

Nitrogen doped titanium dioxide (N-doped TiO2
) was synthesized by microwave using urea as nitrogen sources with
commercially available TiO2
-P25. The N-doped TiO2
was compared with unmodified TiO2
by carrying out the investigation
on its properties using x-ray diffraction (XRD) analysis, Brunauer-Emmett-Teller (BET), Fourier transformed infrared
spectroscopy (FTIR) and diffuse reflectance spectroscopy (UV-Vis DRS). The photocatalytic activities of N-doped TiO2
and unmodified TiO2 were studied for photodegradation of reactive red 4 (RR4) under light emitting diode (LED) light
irradiation. An active photoresponse under LED light irradiation was observed from N-doped TiO2
with 60 min of time
irradiation to complete RR4 color removal while no photocatalytic degradation was observed from unmodified.