Dr. Carla Vilela

Abstract:

Cellulose is the most abundant natural polymer and, as a result of its renewability, abundance, low cost and fascinating structure and properties, is being investigated to produce materials for water remediation [1]. Although cellulose is mostly used in the form of fibers and nanofibers, it can also be utilized in the form of particles at the micro and nanoscales [2], exhibiting large surface area and abundant surface hydroxyl groups that enable a variety of physical and chemical modifications [3]. In the present study, cellulose-based beads incorporating magnetic and catalytic nanoparticles (NPs) were developed for enhanced water treatment applications. The cellulose beads from wood pulp fibers were produced using a dual-fluid system, with one hemisphere functionalized with magnetite (Fe₃O₄) NPs and the other with platinum (Pt) NPs. Scanning electron microscopy (SEM) confirmed their spherical shape and the two distinct surface topographies. Additionally, the resulting beads exhibited magnetic properties, auto-propulsion, and the potential to reduce the levels of organic pollutants, such as Rhodamine B. This dual-functional material presents a promising approach for advanced water treatment by combining magnetic and catalytic properties to enhance pollutant removal.