Multifunctional Photocatalytic Degradation of Methylene Blue Using LaMnO3/Fe3O4 Nanocomposite on Different Types of Graphene

5th International Conference on Science & Engineering in Mathematics, Chemistry and Physics 2017

数学;化学;物理学

Susanti, Yulia Dwi^1,2 ; Afifah, Nur^1,2 ; Saleh, Rosari^1,2

Departemen Fisika, Fakultas MIPA, Universitas Indonesia, Kampus UI Depok, 16424, Indonesia^1

Integrated Laboratory of Energy and Environment, Fakultas MIPA, Universitas Indonesia, Kampus UI Depok, 16424, Indonesia^2

关键词: Coprecipitation method;    Electron-hole recombination;    Graphite structures;    High separation efficiency;    Orthorhombic structures;    Photo catalytic degradation;    Photocatalytic efficiency;    Photocatalytic process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/820/1/012021/pdf
DOI  :  10.1088/1742-6596/820/1/012021

来源: IOP

【 摘 要 】

This study added different types of graphene (GN-1 and GN-2) in to LaMnO3/Fe3O4nanocomposite to degrade MB as an organic pollutant. LaMnO3/Fe3O4/GN-1 and LaMnO3/Fe3O4/GN-2 composites were synthesized using the co-precipitation method in a constant 5 wt% of GN. The as-prepared samples were characterized using XRD and TGA. The LaMnO3/Fe3O4/GN-1 and LaMnO3/Fe3O4/GN-2 composites showed the orthorhombic structure of LaMnO3nanoparticles and the cubic spinel of Fe3O4nanoparticles, as well as of GN-1 and GN-2. The graphite structure of NGP in LaMnO3/Fe3O4/GN-1 composites was confirmed. However, the peak of graphene in LaMnO3/Fe3O4/GN-2 could not be identified. The photocatalytic efficiency of the LaMnO3/Fe3O4/GN-2 was higher than that of LaMnO3/Fe3O4/GN-1. The enhancement of the photocatalytic light activity can be attributed to the high separation efficiency of electron-hole recombination and to the large surface contact between LaMnO3/Fe3O4and graphene, which can improve the transfer efficiency of the photocatalytic process. In addition, the effects of catalyst dosage, rate constant, and scavengers were investigated and discussed.