Table 1.

Comparison of ammonia removal efficiency (%) using various photocatalysts.

Photocatalysts	Light	Removal efficiency (%)	Main products	Time(h)	Ref.
TiO2/perlite	UV	68	N2	3	Shavisi et al., 2014
Pd/N/ TiO2	Vis	80	N2	2	Sun et al., 2015
La/Fe/ TiO2	UV	64.6	${\text{NO}}_3^{-}$, ${\text{NO}}_2^{-}$, N2	5	Luo et al., 2015
ZnFe2O4/rGO	Vis	92.3	N2	4	Liu et al., 2017
SL g-C3N4	UV	80	${\text{NO}}_3^{-}$	6	Wang et al., 2014
TiO2-ZnO/LECA	Vis	95.2	/	3	Mohammadi et al., 2016
Cu/ZnO/rGO	Vis	83.2	N2	2	This work