Environmentally Friendly Preparation of Zinc Oxide, Study Catalytic Performance of Photodegradation by Sunlight for Rhodamine B Dye

Abstract

This study includes the photocatalytic degradation of Rhodamine B (Rh.B) employing a heterogeneous photocatalytic process by using ZnO nanoparticles that was prepared by green sol-gel process. The structural, morphological, and its optical properties of ZnO Photocatalyst was studied using different characterization techniques such as Xray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), The influencing factors studied were the amount of the catalyst, the concentration of dye and pH on photocatalytic degradation of Rhodamine B. The experiments were carried out by irradiating the aqueous solutions of dyes containing photocatalysts with Sunlight. The rate of decolorization was estimated from residual concentration spectrophotometrically. Similar experiments were carried out by varying pH (3-11), amount of catalyst (0.25-2.0 g/L) and initial concentration of dye (5-50 mg/L). The experimental results indicated that the maximum degradation (71%) of dyes was achieved using ZnO photocatalyst at pH 10 after 240 min.

Green Method, Optical and Structural Characterization of ZnO Nanoparticles Synthesized Using Leaves Extract of M. oleifera

“…Crystallinity parameters of bulk, unannealed and annealed at 600°C of ZnO-NPs dry state, this quality is essential to maintain its properties such as reactivity, electrostatic charge, qualities surface, among others, that must be considered for various applications. Different works associated with the development of nanoparticles of different kinds show in their morphological analyzes this type of agglomeration in different degrees at similar scales[53][54][55].…”

Nanoengineered biomimetic hydrogels: A major advancement to fabricate 3D‐printed constructs for regenerative medicine

“…0D nano‐reinforcing agents enhancing the performance of inks based on natural hydrogels: (a) TEM image of HAp nanoparticles, (a′) the addition of HAp nanoparticles improves the mechanical properties of an alginate/gelatin 3D printed hydrogel; (b) SEM micrograph of SiO 2 nanoparticles, (b′) increased ALP activity is observed for SiO 2 ‐nano‐reinforced inks; (c) SEM image of bioglass nanoparticles, (c′) X‐ray diffractogram shows crystalline peaks of HAp, thus confirming the mineralization of bioglass‐supplemented printing formulations; (d) TEM image of Fe 2 O 3 nanoparticles, (d′) the self‐healing efficiency of 3D printed hydrogels elevates with the increase of Fe 2 O 3 nanoparticles addition; (e) FESEM micrograph of ZnO nanoparticles, (e′) the antibacterial activity of 3D printed gelatin hydrogels containing ZnO nanoparticles is intensified. (a) reprinted from Chang et al (2013) Copyright (2013) with permission from Elsevier, (a′) reproduced from (Fan et al, 2019) (licensed under CC BY 3.0), (b) reproduced from M. A. Ahmed et al (2015) (licensed under CC BY 4.0), (b′) reproduced from Roopavath et al (2019) (licensed under CC BY 3.0), (c) reproduced from X. Wang et al (2014) (licensed under CC BY 4.0), (c′) reproduced from Montalbano, Borciani, et al (2020) (licensed under CC BY 4.0), (d) adapted with permission from Tognato et al (2019), (d′) reprinted from Ko et al (2020) Copyright (2020) with permission from Elsevier, (e) reproduced from Al‐Bedairy and Habeeb Als (2018) (licensed under CC BY 4.0), (e′) reprinted from Ahmed, Mulla, Joseph, et al (2020) Copyright (2020) with permission from Elsevier. 0D, zero‐dimensional; ALP, alkaline phosphatase; HAp, hydroxyapatite nanoparticles; SEM, scanning electron microscope; TEM, transmission electron microscopy…”

A new phase transfer nanocatalyst NiFe2O4–PEG for removal of dibenzothiophene by an ultrasound assisted oxidative process: kinetics, thermodynamic study and experimental design

“…12, aer three regeneration cycles, the conversion rate of DBT has decreased from 85% to 78%, which could be due to the deposition of the produced sulfone on the nanocatalyst active sites, which results in a decrease in the catalyst activity. 43,44,46…”