Successive Photocatalytic Degradation of Methylene Blue by ZnO, CuO and ZnO/CuO Synthesized from Coriandrum sativum Plant Extract via Green Synthesis Technique

Abstract

In this study, successful synthesis of ZnO nanoparticles (NPs), CuO NPs, and ZnO/CuO nanocomposite through an eco-friendly method using Corriandrum sativum leaf extract as a capping agent is reported. Using XRD, FTIR, UV-Vis, and SEM techniques, the synthesized materials were characterized for structural analysis, functional groups identification, spectroscopic measurements, and morphological analysis. The percentage composition and purity of the samples were determined by using Energy Dispersive X-ray (EDX), which showed the synthesis of materials. Morphological analysis was done by Scanning Electron Microscopy (SEM) which reflected that the CuO NPs, ZnO NPs and ZnO/CuO nanocomposite were spherical, and the average size calculated by using Image J software was around 25 nm, 55 nm, and 11 nm, respectively. FTIR and UV-Vis analyses were used for synthetic confirmation through characteristic peaks of materials. The synthesized (ZnO, CuO, and CuO/ZnO) nanomaterials were evaluated for photocatalytic activity using methylene blue (MB) dye. Among all three photocatalysts, the composite showed maximum photodegradation compared to the other two materials. The present work could lead to a pathway for the decontamination of harmful dyes of wastewater released from different industries.

Green Synthesis of TiO2 Using Impatiens rothii Hook.f. Leaf Extract for Efficient Removal of Methylene Blue Dye

“…The extraction was done following the method reported by Basit and colleagues with modification . The fresh leaves of Impatiens rothii Hook.f.…”

“…The pH values were adjusted by adding 0.1 M NaOH solution. The percent removal of MB dye by IL–TiO 2 NPs was calculated using the formula in eq % degradation = C 0 − C C 0 × 100 = A 0 − A A 0 × 100 where C 0 and A 0 are dye concentration and absorbance, respectively, before irradiation.…”

“…The extraction was done following the method reported by Basit and colleagues with modification. 40 The fresh leaves of Impatiens rothii Hook.f. were collected from Menz Gera Midir, Amhara regional state, Ethiopia.…”

Biologically Reduced Zinc Oxide Nanosheets Using Phyllanthus emblica Plant Extract for Antibacterial and Dye Degradation Studies

“…ZnO nanoparticles produce ROS under UV light. Te primary uses of zinc oxide in the chemical, cosmetics, and pharmaceutical sectors are for its photocatalytic and antibacterial properties [19]. Zinc oxide nanoparticles' antibacterial capabilities have been widely investigated [20,21], and the development of oxidative stress linked to the particles' photocatalytic activity is thought to be the main cause of toxicity [22].…”

Synthesis of PVP-capped trimetallic nanoparticles and their efficient catalytic degradation of organic dyes

“…Due to the abovementioned facts, scientists turned their attention to the possibility of treating industrial wastewater effluents with dyes and exploring innovative treatment methods. Many methods have been reported in the literature previously such as microbial degradation, 7 photo-catalytic degradation, [8][9][10][11][12][13][14][15][16][17] occulation, 18 activated carbon sorption, 19 redox treatment, 20 electrocoagulation, etc. All the reported methods are expensive, ineffective, and time-consuming and the generation of by-products is the main drawback of using these methods.…”