Photocatalytic activity enhanced by photo-thermal conversion with recyclable hollow Fe3O4@TiO2 nanoparticles

9th Edition of the International SOLARIS Conference

Shi, Lei^1 ; He, Yurong^1

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin

1500014, China^1

关键词: High specific surface area;    Hydrothermal methods;    Large-scale applications;    Material consumption;    Photo-thermal conversions;    Photocatalytic nanoparticles;    Solar energy applications;    Solar energy systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/556/1/012030/pdf
DOI  :  10.1088/1757-899X/556/1/012030

来源: IOP

【 摘 要 】

Photocatalytic nanoparticles have been applied in the utilisation of solar energy because of their excellent harvesting of solar energy for wastewater treatment and chemical synthesis. In particular, TiO2 nanoparticles exhibit unique photo-catalytic performance due to their high specific surface areas and distinctive optical properties. However, the presence of nanoparticles in solar energy systems can cause secondary pollution and severely limit large-scale application of the nanoparticles in solar technology. In the present work, recoverable hollow Fe3O4@TiO2 nanoparticles were synthesized via a modified hydrothermal method. The prepared nanoparticles exhibit superior photocatalytic activity for degrading organic pollutants (Rhodamine B), which is 33.1% higher than that of P25, and the effect of photo-thermal conversion in enhancing the photo-catalytic activity of this nanoparticles was studied, which has not been investigated in most of previous reports. This study not only reveals that photo-thermal conversion plays an important role in enhancing photocatalytic activity, but also provides an approach to significantly reduce material consumption in the design of solar devices and facilitate the efficient utilization of solar energy applications.