Photocatalytic Behaviour of Zinc Oxide/Polystyrene Nanocomposite for Removal of Malachite Green Dye under UV-Light

2020 ◽  
Author(s):  
Katerina Zaharieva ◽  
Silvia Dimova ◽  
Mariya Kyulavska ◽  
Filip Ublekov ◽  
Irina Stambolova ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Malachite Green ◽  
Uv Light ◽  
Malachite Green Dye

scholarly journals Photocatalytic Degradation of a Basic Dye Using Zinc Oxide Nanocatalyst

2019 ◽  
Vol 81 ◽  
pp. 18-26 ◽  
Author(s):  
Maureen O. Chijioke-Okere ◽  
Nnaemeka John Okorocha ◽  
Basil N. Anukam ◽  
Emeka E. Oguzie
Keyword(s):  
Zinc Oxide ◽  
Malachite Green ◽  
Uv Light ◽  
Degradation Kinetics ◽  
Catalyst Loading ◽  
Order Kinetic ◽  
X Ray Diffraction ◽  
First Order ◽  
Malachite Green Dye ◽  
Order Kinetic Model

The potential of Calcinated and uncalcinated zinc oxide as effective Photocatatlyst for the degradation of malachite green dye, MG from aqueous medium using UV light has been identified. The photocatalysts were characterized using scanning electron microscope, SEM and x-ray diffraction, XRD. The SEM investigations of the calcinated ZnO revealed highly dispersed nanomaterials and the particles were of nanometer size in agreement with the XRD result. The uncalcinated zinc oxide, ZnO revealed some pronounced nanoparticles. The degradation of MG by the photocatalyst was found to be influenced by adsorbent loading and irradiating time. The optimum degradation was obtained at 0.5g catalyst loading of both calcinated and uncalcinated zinc oxide which is 98.48% and 96.31 % respectively at 150 minutes. The degradation kinetics conformed to the pseudo-first-order kinetic model. The present study showed that calcinated and uncalcinated zinc oxide ZnO can be effectively used as efficient photocatalyst for the degradation of Malachite green dyes from aqueous solutions and effluents.

Fluorine doped zinc oxide nanowires: Enhanced photocatalysts degrade malachite green dye under visible light conditions

2016 ◽  
Vol 42 (4) ◽  
pp. 4672-4678 ◽  
Author(s):  
Mohammad W. Kadi ◽  
David McKinney ◽  
Reda M. Mohamed ◽  
Ibraheem. A. Mkhalid ◽  
Wolfgang Sigmund
Keyword(s):  
Zinc Oxide ◽  
Visible Light ◽  
Malachite Green ◽  
Light Conditions ◽  
Zinc Oxide Nanowires ◽  
Oxide Nanowires ◽  
Malachite Green Dye

scholarly journals Photocatalytic Properties of Microwave-Synthesized TiO2 and ZnO Nanoparticles Using Malachite Green Dye

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
A. K. Singh ◽  
Umesh T. Nakate
Keyword(s):  
Malachite Green ◽  
Zno Nanoparticles ◽  
Uv Light ◽  
Hexagonal Wurtzite Structure ◽  
Stoichiometric Ratio ◽  
X Ray Diffraction ◽  
Zno Nps ◽  
Malachite Green Dye ◽  
Photodegradation Rate ◽  
Scherrer Formula

TiO2 and ZnO nanoparticles (NPs) were synthesized using microwave-assisted method. Synthesized NPs were characterized for their structure, morphology, and elemental composition using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). The crystallite size of synthesized NPs of TiO2 and ZnO was about 12.3 and 18.7 nm as obtained from the Scherrer formula from the most intense XRD peak. The synthesized NPs have been found to be in stoichiometric ratio having anatase and hexagonal wurtzite structure for TiO2 and ZnO, respectively, and are spherical in shape. Surface area of TiO2 and ZnO NPs was found to be about 43.52 m2/g and 7.7 m2/g. Photocatalytic (PC) properties of synthesized NPs were studied for malachite green (MG) dye under UV light. TiO2 NPs were found to be highly photocatalytically active among the two, having efficiency and apparent photodegradation rate of 49.35% and , respectively.

scholarly journals Photocatalytic degradation of malachite green dye using zero valent iron doped polypyrrole

2021 ◽  
Vol 27 (2) ◽  
pp. 200638-0
Author(s):  
Bircan HASPULAT TAYMAZ ◽  
Handan KAMIŞ ◽  
Özge YOLDAŞ
Keyword(s):  
Malachite Green ◽  
Uv Light ◽  
Irradiation Time ◽  
Oxidative Polymerization ◽  
Zero Valent Iron ◽  
Point Of Zero Charge ◽  
Light Illumination ◽  
X Ray ◽  
Malachite Green Dye ◽  
Iron Doped

The zero valent iron doped polypyrrole (Ppy/Fe) was synthesized via chemical oxidative polymerization method in diethylene glycol medium for the first time in this study. The characterization of synthesized Ppy and Ppy/Fe composites was realized by using fourier transform infrared spectrometer (FTIR), UV-visible diffuse reflectance spectrometer (DRS), scanning electron microscope (SEM), elemental dispersion X-ray analysis (EDX), four point probe electrical conductivity X-Ray diffraction spectroscopy (XRD) and pH at point of zero charge (pHpzc) methods. These characterizations show that there is an interaction between zero valent iron (Fe0) and Ppy polymer. The photocatalytic activity of synthesized Ppy and Ppy/Fe composite were investigated by degradation of malachite green (MG) dye under UV light irradiation. Ppy/Fe composite was achieved complete degradation within 60 min, which is 5.92 times faster than pure Ppy. The effect of irradiation time, ratio of Ppy and Fe0 in the synthesized composites, photocatalyst amount to photocatalytic efficiency of Ppy/Fe is studied. Also, the photocatalytic stability of Ppy/Fe is investigated under UV light illumination for degradation MG dye.

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