Nitrogen Oxide
Nitrogen oxides are a group of gases. They are formed by nitric oxide and nitrogen dioxide. They are largely produced by the burning of fossil fuels. They cause harmful effects on the environment and on human health.
The University of Cordoba, specifically a team at the Chemical Institute for Energy and the Environment (IQUEMA) is reducing this gas. They have developed a photocatalytic material, while not unlike previous versions, it is far more economical and sustainable.
The team's work was published in the journal Advanced Sustainable Systems. The presence of light can cause certain chemical reactions to be favored or accelerated. Light energy in the presence of a material that acts like a catalyst makes it possible to turn nitrogen oxides into nitrates and nitrites.
The first author of this research paper is named Laura Marin. She explains that the new techniques involve visible light, and not ultraviolet light, as it is much more abundant and makes up most of the solar spectrum.
The team created a new compound. They mixed carbon nitride and lamellar double hydroxides. The carbon nitrides can be activated in visible light. The lamellar double hydroxides catalyze the reaction and are cheap and easy to upscale.
One of the main researchers in the study is Professor Ivana Pavlovic. She explains that the process can convert 65% of nitrogen oxides using visible light, similar to old projects. However, the new system uses minerals like magnesium and aluminum. The lead researcher points out, "(These are) Cheaper, abundant in nature, and benign, compared to other photocatalysts used to date, which contain cadmium, lead or graphene."

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