An Outward
Coating Route to CuO/MnO<sub>2</sub> Nanorod
Array Films and Their Efficient Catalytic Oxidation of Acid Fuchsin Dye
- Publication date
- Publisher
Abstract
An outward coating
method has been successfully employed to prepare
CuO/MnO<sub>2</sub> nanorod array films based on the impregnation
of Cu(OH)<sub>2</sub> nanorod array films with manganese nitrate aqueous
solution and heat post-treatment. The as-prepared CuO/MnO<sub>2</sub> nanorod array films as heterogeneous catalysts successfully address
such issues as easy agglomeration, difficult separation, and possible
secondary pollution related to powder catalysts. Furthermore, they
exhibit catalytic oxidation activity for the degradation of acid fuchsin
(AF) dye in aqueous solution superior to that of bare CuO nanorod
array films in the presence of H<sub>2</sub>O<sub>2</sub>, because
of the synergistic effects of both CuO and MnO<sub>2</sub>. The effects
of the initial concentration of aqueous AF solution and H<sub>2</sub>O<sub>2</sub> dosage on the catalytic oxidation performance were
evaluated, indicating that the degradation ratio of AF can reach up
to 94.05%. Life-cycle performance and scaleup of the catalytic oxidative
degradation process demonstrate the durability and potential engineering
application of CuO/MnO<sub>2</sub> nanorod array films in dye wastewater
treatment
