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Abstract
Hexagonal ZnO nanoparticles doped with Mn and supported with a minor amount of carbon nanotubes (CNTs) were synthesized through a simple coprecipitation-ultrasonication process with high yield. The effect of Mn doping, as well as CNTs addition on structure, surface morphology and texture, optical and electronic properties, was studied. We found that just 1% Mn doping and 1% CNT addition on ZnO showed the best crystallinity, highest surface area, improved visible light absorption, and a lowest estimated band gap of 2.6 eV with minimum charge recombination as revealed from photoluminescence spectra. The application of the optimum composition of the synthesized sample for the photodegradation of malachite green dye showed enhanced photocatalytic activity > 95% under visible light irradiation within 120 min at a minimum dosage of 0.1 g L−1 without any using of hole scavenger or changing the pH. This work highlighting the humble preparation procedure and develops photocatalysis research for real industrial applications.
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