Evaluation of the photocatalytic activity of iron oxide nanoparticles functionalized with titanium dioxide

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Herrera, A.^1 ; Reyes, A.^1 ; Colina-Márquez, J.^1

Universidad de Cartagena, Cartagena, Colombia^1

关键词: Coprecipitation method;    Iron oxide nanoparticle;    Magnetic nano-particles;    Phenol photodegradation;    Photocatalytic activities;    Polysiloxane matrixes;    TiO2 nano-particles;    UV irradiation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012034/pdf
DOI  :  10.1088/1742-6596/687/1/012034

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Photocatalytic activity of iron oxide (IO) nanoparticles functionalized with TiO2was evaluated through photodegradation of phenol under UV irradiation. For this, magnetic nanoparticles were synthesized by co-precipitation method obtaining aggregates with a size of 46nm. The IO nanoparticles were encapsulated in a polysiloxane matrix and then functionalized with TiO2at 25°C (sample A: 0.1g TiO2and B: 0.3g TiO2). Photodegradation experiments were carried out for six hours at pH 3.0 using concentrations of IO-TiO2nanoparticles of 0.2, 0.5, and 1.0g/L. A maximum amount of 89% of phenol photodegradation was achieved by using 0.2g/L of the IO-TiO2-B sample. In addition, it was evaluated the possibility to re-using the nanomaterial after magnetic separation. For this, 0.2g/L of B sample were submitted for five cycles of photodegradation. A stable photocatalytic activity was observed as well as the nanoparticles were regenerated by calcination among cycles, which suggests the versatility of these nanoparticles for the photodegradation of organic pollutants.