Iranian Research Organization for Science and Technology Journal of Particle Science and Technology 2423-4087 6 2 2020 09 01 Single-stage solution combustion preparation of ZnFe2O4-ZnS nanoparticles as dye adsorbent: Effect of fuel to oxidant and Zn to Fe molar ratios 113 122 1090 10.22104/JPST.2021.5094.1190 EN Masoud Rafigh Esmaeilzaei Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran Hamideh Saravani Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran Ahmad Reza Abbasian Department of Materials Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran Journal Article 2021 07 22 ZnFe₂O₄-ZnS adsorbent was synthesized by the single-stage solution combustion procedure applying the thiourea at different fuel to oxidant ratios (<em>ϕ</em> = 1, 1.2, 1.4, and 1.6), and different Zn to Fe molar ratios (Zn : Fe = 0.5, 0.6, 0.7, and 0.8). The efficiency of the removal of methyl orange dye by synthesized powders in various conditions was investigated. The best sample, in terms of dye removal, was the synthesized powder at Zn : Fe = 0.6 and <em>ϕ </em>= 1.4. Dye removal was discovered to be extremely pH-dependent. The highest dye removal was observed to be about 94% of methyl orange, which disappears after 20 min in a dark environment. Kinetics investigations were carried out to discover the mechanism of methyl orange elimination and its adsorption rate kinetics. It was found that the elimination of methyl orange by ZnFe₂O₄-ZnS powders follows a pseudo second-order adsorption kinetics model. https://jpst.irost.ir/article_1090_8b4066554730ddfaa0266346bdc1b202.pdf