Preparation of Fluorescent GOs and Its Application in Heavy Metal Ions Detection

Abstract

Tea contains catechins, cholestones, caffeine, inositol, folic acid, pantothenic acid and other ingredients, can improve human health. Therefore, the tea is loved by the "one of the world's three drinks" reputation. But now, some unscrupulous traders in the tea by adding copper ions, want to change the old tea tea. Copper ion is one of the essential trace elements in the human body, but when it is too high, it will bring a lot of damage to the human body. Therefore, we want to use fluorescent oxide graphene to detect copper ions, because copper ions have fluorescence quenching properties. And many heavy metals have similar properties, if the fluorescent oxide graphene can detect copper ions, it must be able to detect many other heavy metal ions.

To graphite as raw material, after several oxidation, the final product of fluorescent oxide graphene. In the first pre-oxidation, the first 8000-purpose graphene and potassium persulfate and phosphorus pentoxide in concentrated sulfuric acid catalyzed reaction, the pre-oxidation products. And then pre-oxidation products through concentrated sulfuric acid and potassium permanganate oxidation of the first oxidation products. The first oxidation product was treated with Piranha solution, and the resulting second oxidation product was fluorinated graphene. The resulting fluorescent oxide graphene in the face of copper ions and other heavy metal ions, will make it fluorescence quenching, so as to achieve the purpose of detection.