Green synthesis of copper oxide nanoparticles using black, green and tarragon tea and investigation of their photocatalytic activity for methylene blue

In this study, copper oxide nanoparticles (CuO-NPs) were obtained by biosynthesis using aqueous extracts of black tea (BT), green tea (GT) and tarragon tea (TT). The effect of extracts from leaves of plants on the reduction mechanism has been investigated. The amount of polyphenol as using reducing agent in the extracts from the plants was determined according to the Folin-Ciocalteu’s method. Total phenolic acid amounts of the extracts of BT, GT and TT were found as 59.18, 42.81 and 49.83 mg/L, respectively. Properties of synthesized CuO-NPs using these extracts were examined by UV-visible spectroscopy, Fourier infrared transformation spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray spectroscopy (EDX) and Atomic Force Microscopy (AFM) analysis. In addition, prepared CuO-NPs were used in methylene blue (MB) removal as a photocatalyst. According to AFM results, average size of CuO-NPs was determined ranging from 10 to 12 nm. Regarding photocatalytic activity, prepared CuO-NPs from BT, GT and TT removed 89%, 87% and 90% of dye in 360 min, respectively. In the photocatalytic removal study, the reaction kinetics were investigated with zero, first and second order kinetics.

Siyah çay, yeþil çay ve tarhun çayý kullanarak bakýr oksit nanoparçacýklarýn yeþil sentezi ve metilen mavisi için fotokatalitik aktivitelerinin araþtýrýlmasý

Bu çalýþmada, bakýr oksit nanopartiküller (CuO-NP'ler), siyah çay (BT), yeþil çay (GT) ve tarhun çayý (TT) sulu ekstraktlarý kullanýlarak biyosentez yoluyla elde edildi. Bitkilerin yapraklarýndan elde edilen ekstrelerin indirgeme mekanizmasýna etkisi araþtýrýlmýþtýr. Bitkilerden elde edilen ekstraktlarda indirgeyici ajan olarak kullanýlan polifenol miktarý Folin-Ciocalteu'nun yöntemine göre belirlendi. BT, GT ve TT ekstrelerinin toplam fenolik asit miktarlarý sýrasýyla 59.18, 42.81 ve 49.83 mg / L olarak bulundu. Bu özütler kullanýlarak sentezlenen CuO-NP'lerin özellikleri UV-görünür spektroskopi, Fourier kýzýlötesi dönüþüm spektroskopisi (FTIR), Taramalý Elektron Mikroskobu (SEM), Enerji Daðýtýcý X-ýþýný spektroskopisi (EDX) ve Atomik Kuvvet Mikroskobu (AFM) analizi ile incelenmiþtir. Ayrýca hazýrlanan CuO-NP'ler metilen mavisi (MB) gideriminde fotokatalizör olarak kullanýlmýþtýr. AFM sonuçlarýna göre, CuO-NP'lerin ortalama boyutu 10 ila 12 nm arasýnda belirlendi. Fotokatalitik aktivite ile ilgili olarak, BT, GT ve TT'den hazýrlanan CuO-NP'ler sýrasýyla 360 dakikada% 89,% 87 ve % 90 oranýnda boyayý giderdi. Fotokatalitik giderim çalýþmasýnda reaksiyon kinetiði sýfýr, birinci ve ikinci dereceden kinetik ile incelendi.