Fig. 4: Van Krevelen plot showing the correlation between H/C ratio and N/C ratio.

The N-containing compounds detected in heterogeneous reaction of NO2 with GA/Fe(III)/NO3− ([NO3−] = 0.05 mol L−1) in the dark.

The N-containing compounds detected in heterogeneous reaction of NO2 with GA/Fe(III)/NO3− ([NO3−] = 0.05 mol L−1) in the dark.