Reusable Mn-Doped ZnS Magnetic Nanocomposite for Photodegradation of Textile Dyes

• Published in: Journal of nano research Vol. 33; pp. 72 - 82
• Main Authors: Luu Thi, My Dung, Nguyen, Van Cuong, Nguyen, Thi Oanh
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.06.2015
• Subjects: Degradation; Dyes; Manganese; Nanostructure; Photodegradation; Reusable; Zinc; Zinc sulfides; Photodegaradation; Mn-Doped ZnS Nanoparticle; Nanocomposites; Wastewater; Textile Dye
• ISSN: 1662-5250; 1661-9897; 1661-9897
• DOI: 10.4028/www.scientific.net/JNanoR.33.72

Magnetic nanoparticles of manganese doped ZnS has been synthesized with different molar ratios of manganese and zinc by co-precipitation method. Structure of the prepared nanocomposite was investigated using FT-IR, XRD, TEM and VSM. The most excellent photodegradation efficiency of Reactive Blue 198 (RB198) was observed with the molar ratio of Mn-doped ZnS/Fe3O4 and it was 1:1 in which molar percentage of Mn2+ was 9%. The experiments of dye degradation were carried out under visible light and UV radiation. Results shown that the degradation efficiency of RB198 was up to 100% at the concentration of 200 ppm for 10 minutes when the amount of catalyst was 0.2g/l. Additionally, the effect of various parameters including initial concentration, illumination time and pH to the photodegradation efficiency of dye was also carried out. More interestingly, the reusable experiments showed that the nanocomposited exhibited high photodegradation capacity after three cycles and can be recycled conveniently from water with the assist of an external magnet because of its exceptional properties.