Hoạt tính xúc tác quang phân hủy methylene blue bằng vật liệu nano bán dẫn ZnO pha tạp Eu và Mn: Một nghiên cứu so sánh

Abstract

This study was carried out to synthesize Eu- and Mn-doped ZnO nanomaterials with optical properties suitable for catalytic applications. ZnO nanomaterials with 1%, 5%, and 10% mol of dopant were prepared using hydrothermal method. The structural, morphological, optical, and magnetic properties of the as-prepared nanoparticles were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), and X-ray energy dispersion spectroscopy (EDS). The results showed that the Eu-doped ZnO and Mn-doped ZnO nanoparticles exhibited a hexagonal wurtzite structure. The activity of the prepared photocatalysts was evaluated based on the photodegradation of methylene blue (MB) under ultraviolet light UV. ZnO materials doped with 5% mol Eu and ZnO materials doped with 1% mol Mn showed the best photocatalytic activity. Furthermore, the MB photodegradation reaction was observed to follow a first-order reaction. Finally, synthesized metal-doped ZnO materials are easy to recover and highly reusable.