Preparation of the Cotton Fiber Coated with MnO2 Catalyst for Formaldehyde Removal Application

Abstract

This research aim was to prepare cotton fiber coated with a manganese dioxide (MnO₂) catalyst for formaldehyde removal. The cotton fiber obtained from the natural fiber was soaked with a mixing solution of potassium permanganate and ammonium oxalate at the different soaking times to prepare the cotton fiber coated with MnO₂ catalyst. The crystal structure, chemical composition, and adhesion of MnO₂ catalysts on cotton fiber were investigated. The results show that the pure phase of MnO₂ can be prepared from the mixing solution. The adhesion of MnO₂ catalyst on cotton fiber increased with increasing the soaking time. The cotton fiber coated with MnO₂ catalyst was tested the formaldehyde removal with initial formaldehyde concentration at 5 ppm in the closed chamber. The behavior of formaldehyde removal was exponential decay in the range of 0 to 90 mins. In addition, the formaldehyde removal efficiency of cotton fiber coated with MnO₂ catalyst was higher than 90%