PROCESS AND MATERIAL MADE BY GREEN CHEMISTRY METHODS FOR CATALYTIC OXIDATION OF EMERGENT MICROPOLLUTANTS

The invention relates to a material with catalytic properties and to a process for preparing the same by using the green chemistry methods, the material being meant to be used for the catalytic oxidation of emergent micropollutants from the category of pharmaceutical products contained by aqueous solutions, at ambient temperature and atmospheric pressure, in semi-continuous system. According to the invention, the material consists of a thin film comprising nanoparticles of Cu oxide with the particle size ranging between 6...70 nm, the Cu oxide nanoparticles being phytosynthesized by using an alcoholic or hydroalcoholic extract prepared from leaves of Rhus typhina L.,1756, by microwave-assisted extraction, at a temperature ranging between 75...105°C, extraction time 1...2 hours, at a variable power of the microwaves, with the plant material : solvent ratio ranging between 1 : 8...1 : 14 and Cu nitrate trihydrate with the concentration 1 x 10-3 M...1 M, with variable extract : solution ratios ranging between 4 : 1...1 : 14. The claimed preparation process is performed in two stages: in the first stage the phytosynthesized Cu oxide nanoparticles are prepared, and in the second stage they are deposited on glass plates by the immersion deposition process, followed by the calcination thereof in an oven, for 2...4 hours, at a temperature ranging between 400...580°C. Invenţia se referă la un material cu proprietăţi catalitice şi la un procedeu de obţinere a acestuia prin metodele chimiei verzi, materialul fiind utilizat pentru oxidarea catalitică a micropoluanţilor emergenţi, din categoria produşilor farmaceutici, conţinuţi în soluţii apoase, la temperatură ambiantă şi presiune atmosferică în sistem semicontinuu. Materialul conform invenţiei este compus dintr-un film subţire conţinând nanoparticule de oxid de Cu cu dimensiunea particulelor cuprinsă între 6...70 nm, nanoparticulele de oxid de Cu fiind fitosintetizate folosind un extract alcoolic sau hidroalcoolic obţinut din frunze de Rhus typhina L.,1756, prin extracţia asistată de microunde, la o temperatură cuprinsă între 75...105°C, timp de extracţie 1...2 ore, la o putere variabilă a microundelor, cu raportul material vegetal : solvent cuprins între 1 : 8...1 : 14 şi azotat de Cu trihidrat de concentraţie 1 x 10-3 M...1 M, în rapoarte variabile de extract : soluţie cuprinse între 4 : 1...1 : 14. Procedeul de obţinere conform invenţiei se realizează în două etape: în prima etapă se obţin nanoparticulele de oxid