Cheap and sustainable photocatalyst reduces nitrogen oxides using sunlight to decontaminate the air

https://www.eurekalert.org/news-releases/1067858

"reaction accelerated by visible light... oxidizes nitrogen oxides converting into nitrates/ nitrites... combining carbon nitride (enabling reaction to visible light) and lamellar double hydroxides (catalyzes)... easily scalable, converts 65% of nitrogen oxides, like with other photocatalysts, but using safer, cheaper magnesium or aluminum instead of cadmium, lead or graphene"