Journal Article Epublish
PubMed: 41695405 DOI: 10.1039/d5ra08965d
Pechini synthesis and characterization of Co 2MnO 4 nanostructures and their application as a nano-photocatalyst for degradation of malachite green in contaminated water under sunlight.
RSC Adv 16(10):8709-8719
Authors: Masoumeh Yaqoubi, Mojgan Ghanbari, Elmuez A Dawi, Safaa H Ganduh, Layth S Jasim, Masoud Salavati-Niasari
Affiliations
- Institute of Nano Science and Nano Technology, University of Kashan P. O. Box 87317-51167 Kashan Iran +98 31 55913201 +98 31 55912383.
- College of Humanities and Sciences, Department of Mathematics and Sciences, Ajman University P. O. Box 346 Ajman United Arab Emirates.
- Department of Chemistry Pharmaceutical, College of Pharmacy, University of Al-Qadisiyah Diwaniyah Iraq.
- Department of Chemistry, College of Education, University of Al-Qadisiyah Diwaniyah Iraq.
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Kashan P. O. Box 87317-51167 Kashan Iran.
Abstract
A spinel-type Co 2MnO 4 nanostructure was synthesized under various chelating and polymerizing conditions and systematically investigated for its ability to degrade malachite green (MG) in visible light. The structural, morphological, and optical properties of the samples were analyzed using XRD, FTIR, FESEM, EDX, TEM, BET, and DRS techniques. In this study, the catalyst synthesized from citric acid and propylene glycol (CMO-1) was most effective, with a generally uniform morphology and narrow particle size distribution (100-120 nm), a high surface area and a narrow 1.52 eV bandgap, among all samples examined. Under visible light, CMO-1 minimally degraded MG by 98.6% in 120 minutes with pseudo-first-order kinetics (k = 0.02542 min -1). In scavenger experiments, it was determined that photogenerated holes (h +) contributed the most to degradation. Furthermore, the stability of the catalyst was assessed, in which it maintained 85% activity after 5 consecutive cycles of degradation without deteriorating structurally. A comparison of Co 2MnO 4 with other manganese-based and composite photocatalysts revealed similar or better performance when activated by visible light, demonstrating its potential as an effective and reusable photocatalyst for wastewater treatment.
MeSH
Nanostructures, Sunlight