Nickel doped zinc oxide with improved photocatalytic activity for Malachite Green Dye degradation and parameters affecting the degradation

Zinc oxide and zinc oxide doped with tin oxide (ZnO-SnO2) particles were synthesized and successfully incorporated into a polymeric matrix by the photopolymerization reaction in the presence of Irg819 as the photoinitiator. The obtained samples were investigated by means of XRD, ESEM/EDX, TEM, FTIR, and Raman spectroscopy. The ZnO particles were obtained in the form of rods agglomerated in flower (or star) structures with lengths of 2–4 μm and widths between 30 and 100 nm, while ZnO-SnO2 samples evolved in the form of cubes, with sides of 350 nm. The prepared composite films with ZnO and ZnO-SnO2 particles were tested in the photocatalytic degradation of malachite green (MG) dye. While the ZnO-based composite film showed a fairly high photocatalytic activity, the hybrid film containing ZnO doped with SnO2 displayed 100% photocatalytic activity after only 45 min of irradiation, being among the most efficient photocatalysts known for MG degradation. In addition, the recycling tests demonstrated that this film displayed high stability during the photocatalysis reaction since no decrease in the photocatalytic performance was noticed after the first three cycles, indicating its suitability for dyes removal and wastewater purification.

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Photo-catalytic Study of Malachite Green Dye Degradation Using Rice Straw Extracted Activated Carbon Supported ZnO Nano-particles

Nanoscience &Nanotechnology-Asia ◽

10.2174/2210681209666190722121926 ◽

2020 ◽

Vol 10 (6) ◽

pp. 849-859

Author(s):

Radwa A. El-Salamony ◽

Abeer A. Emam ◽

Nagwa A. Badawy ◽

Sara F. El-Morsi

Keyword(s):

Activated Carbon ◽

Visible Light ◽

Rice Straw ◽

Malachite Green ◽

Dye Degradation ◽

Nano Particles ◽

Oh Radicals ◽

Impregnation Method ◽

Photo Degradation ◽

Malachite Green Dye

Objective: ZnO nanoparticles were synthesized using wet impregnation method, and activated carbon from rice straw (RS) prepared through chemical route. Methods: The nano-composites ZnO-AC series were prepared with different ZnO:AC ratio of 10, 20, 50, and 70% to optimize the zinc oxide nanoparticles used. The obtained composites were characterized by FE-SEM, XRD, SBET, and optical techniques then used for the photo-degradation of Malachite green dye (MG) under visible light. Results: It was found that 10ZnO-AC exhibited excellent visible light photo-catalytic performance. The ·OH radicals’ formation is matching with photo-activity of the prepared composites. The photo-degradation efficiency of MG increased from 63% to 93%, when the 10ZnO-AC photocatalyst amount was increased from 0.5 to 6 g/L. Conclusion: The GC-MS technique was used to analyze the intermediates formed; up to 15 kinds of chemicals were identified as the degradation products.

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

Ceramics International ◽

10.1016/j.ceramint.2015.11.052 ◽

2016 ◽

Vol 42 (4) ◽

pp. 4672-4678 ◽

Cited By ~ 20

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

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Synthesis and Characterization of Nickel Cobalt Vanadate (NiCo2V2O8) Nanostructures: Photocatalytic and Supercapacitor Applications

Asian Journal of Chemistry ◽

10.14233/ajchem.2021.23416 ◽

2021 ◽

Vol 33 (11) ◽

pp. 2831-2838

Author(s):

Lakshmana Naik R. ◽

T. Bala Narsaiah ◽

C.R. Ravikumar ◽

A. Naveen Kumar ◽

K. Vinutha ◽

...

Keyword(s):

Photocatalytic Activity ◽

Transition Metal ◽

Malachite Green ◽

Electrochemical Behaviour ◽

Specific Capacity ◽

Photocatalytic Property ◽

Ultra Violet ◽

Hydrothermal Route ◽

Malachite Green Dye ◽

Nickel Cobalt

With the emerging newer energy storage applications, transition metal vanadates are booming up as better catalysts. Among all the transition metal vanadates, nickel cobalt vanadate nanomaterials (NiCo2V2O8 NP), are being considered as a promising material with electrocatalytic and photocatalytic activity. In this article, the synthesis of circular and ovular structured NiCo2V2O8 nanostructures by the hydrothermal route without using any capping agent is reported. The crystallinity, physical structure and morphology of the prepared nanomaterial were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared (FT-IR) spectroscopy. The photocatalytic property of NiCo2V2O8 nanostructures was studied by decolorizing industrially hazardous dye such as malachite green dye under ultra-violet light conditions for a regular interval of time (10 min) up to 60 min. The experiments showed decolorization efficiencies as 52.43 for malachite green dye. The electrochemical behaviour of the prepared compound was studied and energy specific capacity was elucidated as 218.4 F g-1 with high reversibility property the material. The NiCo2V2O8 nanostructures showed better electrochemical activity and photocatalytic activity, which could be utilized for supercapacitor and pollutant remediation applications.

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