AUTHOR=Fu Ning , Ren Xue-chang 

TITLE=Synthesis of Double-Shell Hollow TiO2@ZIF-8 Nanoparticles With Enhanced Photocatalytic Activities

JOURNAL=Frontiers in Chemistry

VOLUME=8

YEAR=2020

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.578847

DOI=10.3389/fchem.2020.578847

ISSN=2296-2646

ABSTRACT=<p>Synthesis of semiconductor-MOF heterostructure photocatalysts has attracted considerable attention for their thermal stability, controllable crystallinity, and enhanced photocatalytic activity. In this work, the hollow nanostructure of anatase TiO<sub>2</sub> was prepared by etching SiO<sub>2</sub> from core–shell SiO<sub>2</sub>@TiO<sub>2</sub> nanoparticles. ZIF-8, one of the metal-organic frameworks (MOFs), was hybrid synthesized on the surface of hollow TiO<sub>2</sub> and formed double-shell hollow nanoparticles. The photocatalytic activity of the double-shell hollow TiO<sub>2</sub>@ZIF-8 nanoparticles toward methylene blue (MB) under UV light irradiation was processed, and the highest photocatalytic efficiency of 99.1% was shown compared with TiO<sub>2</sub> and SiO<sub>2</sub>@TiO<sub>2</sub> nanoparticles. This study suggests a promising approach to achieve an advanced photocatalytic performance toward dye degradation using MOFs for the surface engineering of semiconductors.</p>